feat: added openapi doc

- Added transaction support in `add_upstream_target`, `remove_upstream`, `remove_upstream_target`, `update_upstream`, and `update_upstream_target` functions to ensure atomicity of operations.
- Updated the `NginxService` to include methods for validating and applying configurations using the agent service.
- Enhanced error handling in agent service interactions, returning appropriate internal server errors when agent communication fails.
- Introduced mock agent service for testing, allowing for simulation of agent interactions without actual network calls.
- Refactored tests to cover scenarios where agent operations fail, ensuring that internal server errors are returned as expected.

Cargo.lock

@@ -7,7 +7,7 @@ name = "agent_client"
 version = "0.1.0"
 dependencies = [
  "async-trait",
- "mockall",
+ "mockall 0.13.1",
  "reqwest",
  "serde",
  "serde_json",
@@ -292,6 +292,35 @@ dependencies = [
  "syn 2.0.111",
 ]
 
+[[package]]
+name = "axum-test"
+version = "18.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3290e73c56c5cc4701cdd7d46b9ced1b4bd61c7e9f9c769a9e9e87ff617d75d2"
+dependencies = [
+ "anyhow",
+ "axum",
+ "bytes",
+ "bytesize",
+ "cookie",
+ "expect-json",
+ "http",
+ "http-body-util",
+ "hyper",
+ "hyper-util",
+ "mime",
+ "pretty_assertions",
+ "reserve-port",
+ "rust-multipart-rfc7578_2",
+ "serde",
+ "serde_json",
+ "serde_urlencoded",
+ "smallvec",
+ "tokio",
+ "tower",
+ "url",
+]
+
 [[package]]
 name = "base16ct"
 version = "0.2.0"
@@ -509,6 +538,12 @@ version = "1.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b35204fbdc0b3f4446b89fc1ac2cf84a8a68971995d0bf2e925ec7cd960f9cb3"
 
+[[package]]
+name = "bytesize"
+version = "2.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6bd91ee7b2422bcb158d90ef4d14f75ef67f340943fc4149891dcce8f8b972a3"
+
 [[package]]
 name = "cc"
 version = "1.2.45"
@@ -994,6 +1029,12 @@ dependencies = [
  "unicode-xid",
 ]
 
+[[package]]
+name = "diff"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56254986775e3233ffa9c4d7d3faaf6d36a2c09d30b20687e9f88bc8bafc16c8"
+
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -1123,6 +1164,15 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "email_address"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e079f19b08ca6239f47f8ba8509c11cf3ea30095831f7fed61441475edd8c449"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "encoding_rs"
 version = "0.8.35"
@@ -1191,6 +1241,35 @@ dependencies = [
  "pin-project-lite",
 ]
 
+[[package]]
+name = "expect-json"
+version = "1.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "422e7906e79941e5ac58c64dfd2da03e6ae3de62227f87606fbbe125d91080f9"
+dependencies = [
+ "chrono",
+ "email_address",
+ "expect-json-macros",
+ "num",
+ "regex",
+ "serde",
+ "serde_json",
+ "thiserror",
+ "typetag",
+ "uuid",
+]
+
+[[package]]
+name = "expect-json-macros"
+version = "1.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6b515b7f10f1e61bfd938522e9884509b82060af2016153f5b3d6f44d6da89c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.111",
+]
+
 [[package]]
 name = "fastrand"
 version = "2.3.0"
@@ -1925,6 +2004,15 @@ dependencies = [
  "syn 2.0.111",
 ]
 
+[[package]]
+name = "inventory"
+version = "0.3.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc61209c082fbeb19919bee74b176221b27223e27b65d781eb91af24eb1fb46e"
+dependencies = [
+ "rustversion",
+]
+
 [[package]]
 name = "ipnet"
 version = "2.11.0"
@@ -2159,7 +2247,21 @@ dependencies = [
  "cfg-if",
  "downcast",
  "fragile",
- "mockall_derive",
+ "mockall_derive 0.13.1",
+ "predicates",
+ "predicates-tree",
+]
+
+[[package]]
+name = "mockall"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f58d964098a5f9c6b63d0798e5372fd04708193510a7af313c22e9f29b7b620b"
+dependencies = [
+ "cfg-if",
+ "downcast",
+ "fragile",
+ "mockall_derive 0.14.0",
  "predicates",
  "predicates-tree",
 ]
@@ -2176,6 +2278,18 @@ dependencies = [
  "syn 2.0.111",
 ]
 
+[[package]]
+name = "mockall_derive"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca41ce716dda6a9be188b385aa78ee5260fc25cd3802cb2a8afdc6afbe6b6dbf"
+dependencies = [
+ "cfg-if",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.111",
+]
+
 [[package]]
 name = "native-tls"
 version = "0.2.14"
@@ -2741,6 +2855,16 @@ dependencies = [
  "termtree",
 ]
 
+[[package]]
+name = "pretty_assertions"
+version = "1.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3ae130e2f271fbc2ac3a40fb1d07180839cdbbe443c7a27e1e3c13c5cac0116d"
+dependencies = [
+ "diff",
+ "yansi",
+]
+
 [[package]]
 name = "prettyplease"
 version = "0.2.37"
@@ -3115,6 +3239,15 @@ dependencies = [
  "webpki-roots 1.0.4",
 ]
 
+[[package]]
+name = "reserve-port"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "21918d6644020c6f6ef1993242989bf6d4952d2e025617744f184c02df51c356"
+dependencies = [
+ "thiserror",
+]
+
 [[package]]
 name = "rfc6979"
 version = "0.4.0"
@@ -3212,6 +3345,21 @@ dependencies = [
  "ordered-multimap",
 ]
 
+[[package]]
+name = "rust-multipart-rfc7578_2"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c839d037155ebc06a571e305af66ff9fd9063a6e662447051737e1ac75beea41"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "futures-util",
+ "http",
+ "mime",
+ "rand 0.9.2",
+ "thiserror",
+]
+
 [[package]]
 name = "rust_decimal"
 version = "1.39.0"
@@ -4684,6 +4832,30 @@ version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "562d481066bde0658276a35467c4af00bdc6ee726305698a55b86e61d7ad82bb"
 
+[[package]]
+name = "typetag"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be2212c8a9b9bcfca32024de14998494cf9a5dfa59ea1b829de98bac374b86bf"
+dependencies = [
+ "erased-serde",
+ "inventory",
+ "once_cell",
+ "serde",
+ "typetag-impl",
+]
+
+[[package]]
+name = "typetag-impl"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "27a7a9b72ba121f6f1f6c3632b85604cac41aedb5ddc70accbebb6cac83de846"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.111",
+]
+
 [[package]]
 name = "ucd-trie"
 version = "0.1.7"
@@ -5433,6 +5605,7 @@ dependencies = [
  "async-trait",
  "axum",
  "axum-extra",
+ "axum-test",
  "chrono",
  "clap",
  "config",
@@ -5441,11 +5614,13 @@ dependencies = [
  "jsonwebtoken",
  "migration",
  "mime_guess",
+ "mockall 0.14.0",
  "once_cell",
  "reqwest",
  "sea-orm",
  "serde",
  "serde_json",
+ "serde_urlencoded",
  "tempfile",
  "tokio",
  "tower",

apps/api/Cargo.toml

@@ -30,9 +30,13 @@ jsonwebtoken = { version = "10.2.0", features = ["rust_crypto"] }
 uuid = { version = "1.19.0", features = ["v4", "serde", "fast-rng"] }
 tower-http = { version = "0.6.8", features = ["cors"] }
 reqwest = { version = "^0.12", features = ["json", "multipart", "stream"] }
+serde_urlencoded = { version = "0.7.1" }
 
 [dev-dependencies]
 tempfile = "3"
+axum-test = "18.4.1"
+agent_client = { path = "../../public/agent-client", features = ["mockall"] }
+mockall = { version = "0.14.0", features = [] }
 
 [lints.clippy]
 unwrap_used = "deny"

apps/api/src/errors.rs

@@ -1 +1,2 @@
+pub mod api_error;
 pub mod service_error;

apps/api/src/errors/api_error.rs

@@ -0,0 +1,28 @@
+use axum::response::IntoResponse;
+use sea_orm::DbErr;
+
+use crate::errors::service_error::ServiceError;
+
+pub enum ApiError {
+    ServiceError(ServiceError),
+}
+
+impl From<ServiceError> for ApiError {
+    fn from(err: ServiceError) -> Self {
+        ApiError::ServiceError(err)
+    }
+}
+
+impl From<DbErr> for ApiError {
+    fn from(err: DbErr) -> Self {
+        ServiceError::from(err).into()
+    }
+}
+
+impl IntoResponse for ApiError {
+    fn into_response(self) -> axum::response::Response {
+        match self {
+            ApiError::ServiceError(service_error) => service_error.into_response(),
+        }
+    }
+}

apps/api/src/errors/service_error.rs

@@ -1,3 +1,4 @@
+use axum::response::IntoResponse;
 use sea_orm::DbErr;
 
 #[derive(Debug)]
@@ -37,3 +38,23 @@ impl From<DbErr> for ServiceError {
         }
     }
 }
+
+impl IntoResponse for ServiceError {
+    fn into_response(self) -> axum::response::Response {
+        let (status, message) = match &self {
+            ServiceError::NotFound(msg) => (axum::http::StatusCode::NOT_FOUND, msg.clone()),
+            ServiceError::DatabaseError(msg) => {
+                (axum::http::StatusCode::INTERNAL_SERVER_ERROR, msg.clone())
+            }
+            ServiceError::Unauthorized(msg) => (axum::http::StatusCode::UNAUTHORIZED, msg.clone()),
+            ServiceError::InternalError(msg) => {
+                (axum::http::StatusCode::INTERNAL_SERVER_ERROR, msg.clone())
+            }
+            ServiceError::BadRequest(msg) => (axum::http::StatusCode::BAD_REQUEST, msg.clone()),
+        };
+        let body = axum::Json(serde_json::json!({
+            "error": message,
+        }));
+        (status, body).into_response()
+    }
+}

apps/api/src/helpers.rs

@@ -1,2 +1,3 @@
 pub mod constants;
 pub mod database;
+pub mod macros;

apps/api/src/helpers/database.rs

@@ -11,3 +11,16 @@ macro_rules! with_conn {
         }
     }};
 }
+
+pub struct PaginationFilter {
+    pub page: u64,
+    pub per_page: u64,
+}
+
+impl PaginationFilter {
+    pub fn get_offset_limit(&self) -> (u64, u64) {
+        let offset = (self.page - 1) * self.per_page;
+        let limit = self.per_page;
+        (offset, limit)
+    }
+}

apps/api/src/helpers/macros.rs

@@ -0,0 +1,9 @@
+#[macro_export]
+macro_rules! set_if_some {
+    ($field:expr) => {
+        match $field {
+            Some(value) => sea_orm::ActiveValue::Set(value),
+            None => sea_orm::ActiveValue::NotSet,
+        }
+    };
+}

apps/api/src/middlewares/request_info.rs

@@ -1,6 +1,34 @@
+use axum::{extract::FromRequestParts, http::StatusCode};
 use uuid::Uuid;
 
 #[derive(Clone, Debug)]
 pub struct RequestInfo {
     pub user_id: Option<Uuid>,
 }
+
+pub struct AuthenticatedRequestInfo {
+    pub user_id: Uuid,
+}
+
+impl<S> FromRequestParts<S> for AuthenticatedRequestInfo
+where
+    S: Send + Sync,
+{
+    type Rejection = StatusCode;
+
+    async fn from_request_parts(
+        parts: &mut axum::http::request::Parts,
+        _state: &S,
+    ) -> Result<Self, Self::Rejection> {
+        let request_info = parts
+            .extensions
+            .get::<RequestInfo>()
+            .ok_or(StatusCode::UNAUTHORIZED)?;
+
+        if let Some(user_id) = request_info.user_id {
+            Ok(AuthenticatedRequestInfo { user_id })
+        } else {
+            Err(StatusCode::UNAUTHORIZED)
+        }
+    }
+}

apps/api/src/middlewares/require_auth.rs

@@ -68,3 +68,42 @@ async fn handle_unauthenticated() -> Result<Response, StatusCode> {
     // TODO: log unauthenticated access attempts
     Err(StatusCode::UNAUTHORIZED)
 }
+
+#[cfg(test)]
+pub mod mock {
+
+    use super::*;
+
+    pub const REQUEST_AUTH_USER_ID_HEADER: &str = "x-mock-authenticated-user-id";
+    pub const REQUEST_AUTH_USER_INVALID_HEADER: &str = "x-mock-authenticated-invalid";
+
+    pub async fn mock_require_auth(
+        req: Request<axum::body::Body>,
+        next: Next,
+    ) -> Result<Response, StatusCode> {
+        let mut req = req;
+        let invalid_present = req
+            .headers()
+            .get(REQUEST_AUTH_USER_INVALID_HEADER)
+            .is_some();
+        let user_id_header = req.headers().get(REQUEST_AUTH_USER_ID_HEADER).cloned();
+
+        if invalid_present {
+            return handle_unauthenticated().await;
+        }
+
+        let user = req
+            .extensions_mut()
+            .get_or_insert_with(|| RequestInfo { user_id: None });
+        user.user_id = Some(if let Some(user_id_header) = user_id_header {
+            let user_id_str = user_id_header
+                .to_str()
+                .map_err(|_| StatusCode::UNAUTHORIZED)?;
+            Uuid::parse_str(user_id_str).map_err(|_| StatusCode::UNAUTHORIZED)?
+        } else {
+            Uuid::new_v4()
+        });
+
+        Ok(next.run(req).await)
+    }
+}

apps/api/src/routes/api.rs

@@ -1,5 +1,6 @@
 mod auth;
 mod health;
+mod helper;
 mod openapi;
 mod restricted;
 

apps/api/src/routes/api/health/info.rs

@@ -78,24 +78,12 @@ pub async fn get_health_info(
 
 #[cfg(test)]
 mod test {
-    use crate::configs::FromConfig;
-    use crate::services::agent_client::AgentService;
-    use crate::{
-        routes::{AppState, api::health::state::HealthState},
-        services::{
-            auth::{
-                authentication::{
-                    AuthenticationServiceImpl, strategies::password::PasswordStrategy,
-                },
-                user::UserServiceImpl,
-            },
-            server_state::ServerStateService,
-            settings::SettingsService,
-        },
-    };
-
     use super::*;
-    use agent_client::apis::configuration::Configuration;
+
+    use crate::configs::FromConfig;
+    use crate::routes::{AppState, api::health::state::HealthState};
+    use crate::services::get_app_service;
+
     use axum::body::to_bytes;
     use axum::{
         Router,
@@ -116,18 +104,10 @@ mod test {
         let app_state = Arc::new(AppState {
             database_connection: db.clone(),
             config: Arc::new(crate::configs::ProgramSettings::mock()),
-            service: Arc::new(crate::routes::AppService {
+            service: Arc::new(get_app_service(
-                settings: Arc::new(SettingsService::new(db.clone())),
+                &db.clone(),
-                auth_state: crate::routes::AuthState {
+                &crate::configs::ProgramSettings::mock(),
-                    strategy: crate::routes::AuthStrategy {
+            )),
-                        password: Arc::new(PasswordStrategy::new(db.clone())),
-                    },
-                    authentication: Arc::new(AuthenticationServiceImpl::new(None)),
-                },
-                user: Arc::new(UserServiceImpl::new(db.clone())),
-                server_state: Arc::new(ServerStateService::new(db.clone())),
-                agent_client: Arc::new(AgentService::new(Configuration::default())),
-            }),
         });
 
         let app = Router::new()

apps/api/src/routes/api/helper.rs

@@ -0,0 +1 @@
+pub mod pagination;

apps/api/src/routes/api/helper/pagination.rs

@@ -0,0 +1,76 @@
+use axum::{
+    extract::FromRequestParts,
+    http::{StatusCode, request::Parts},
+};
+use serde::{Deserialize, Serialize};
+
+use crate::helpers::database::PaginationFilter;
+
+#[derive(Serialize, Deserialize, utoipa::ToSchema, Clone)]
+/// Pagination parameters for API requests
+pub struct Pagination {
+    /// Page number (1-based)
+    pub page: u32,
+    /// Items per page
+    pub per_page: u32,
+}
+
+impl Default for Pagination {
+    fn default() -> Self {
+        Self {
+            page: 1,
+            per_page: 20,
+        }
+    }
+}
+
+impl From<Pagination> for PaginationFilter {
+    fn from(pagination: Pagination) -> Self {
+        Self {
+            page: pagination.page as u64,
+            per_page: pagination.per_page as u64,
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize, utoipa::ToSchema)]
+/// Pagination information included in API responses
+pub struct PaginationInfo {
+    /// Total number of items
+    pub total_items: u64,
+    /// Total number of pages
+    pub total_pages: u32,
+    /// Current page number
+    pub current_page: u32,
+    /// Items per page
+    pub per_page: u32,
+}
+
+/// Extractor for pagination parameters from query string
+pub struct ExtractPagination(pub Pagination);
+
+impl<S> FromRequestParts<S> for ExtractPagination
+where
+    S: Send + Sync,
+{
+    type Rejection = (StatusCode, &'static str);
+
+    async fn from_request_parts(parts: &mut Parts, _state: &S) -> Result<Self, Self::Rejection> {
+        let query = parts.uri.query().unwrap_or("");
+        let pagination: Pagination = serde_urlencoded::from_str(query).unwrap_or_default();
+
+        // validation
+        if pagination.page == 0 {
+            return Err((StatusCode::BAD_REQUEST, "page must be greater than 0"));
+        }
+
+        if pagination.per_page < 1 || pagination.per_page > 100 {
+            return Err((
+                StatusCode::BAD_REQUEST,
+                "per_page must be between 1 and 100",
+            ));
+        }
+
+        Ok(ExtractPagination(pagination))
+    }
+}

apps/api/src/routes/api/openapi.rs

@@ -3,6 +3,7 @@ pub mod tag {
     pub const HEALTH_TAG: &str = "Health";
     pub const AUTH_TAG: &str = "Authentication";
     pub const USER_TAG: &str = "User";
+    pub const NGINX_TAG: &str = "Nginx";
 }
 
 #[derive(utoipa::OpenApi)]
@@ -14,6 +15,16 @@ pub mod tag {
     crate::routes::api::auth::init_admin::init_admin,
     // User management paths
     crate::routes::api::restricted::user::me::get_user_info,
+    // Nginx upstream management
+    crate::routes::api::restricted::nginx::upstream::create_upstream::create_upstream,
+    crate::routes::api::restricted::nginx::upstream::create_upstream_target::add_upstream_target,
+    crate::routes::api::restricted::nginx::upstream::get_upstream::get_upstream_list,
+    crate::routes::api::restricted::nginx::upstream::get_upstream::get_upstream,
+    crate::routes::api::restricted::nginx::upstream::get_upstream_target::get_upstream_target,
+    crate::routes::api::restricted::nginx::upstream::update_upstream::update_upstream,
+    crate::routes::api::restricted::nginx::upstream::update_upstream_target::update_upstream_target,
+    crate::routes::api::restricted::nginx::upstream::remove_upstream::remove_upstream,
+    crate::routes::api::restricted::nginx::upstream::remove_upstream_target::remove_upstream_target,
   ),
   components(
       schemas(crate::routes::api::health::info::HealthInfo),
@@ -22,11 +33,25 @@ pub mod tag {
       schemas(crate::routes::api::auth::init_admin::AdminInitRequest),
       // User management schemas
       schemas(crate::routes::api::restricted::user::me::UserInfo),
+      // Nginx upstream schemas
+      schemas(crate::routes::api::restricted::nginx::upstream::create_upstream::CreateUpstreamRequestBody),
+      schemas(crate::routes::api::restricted::nginx::upstream::create_upstream_target::CreateUpstreamTargetInfo),
+      schemas(crate::routes::api::restricted::nginx::upstream::get_upstream::GetUpstreamParams),
+      schemas(crate::routes::api::restricted::nginx::upstream::get_upstream_target::GetUpstreamTargetsParams),
+      schemas(crate::routes::api::restricted::nginx::upstream::info::response::UpstreamTargetInfo),
+      schemas(crate::routes::api::restricted::nginx::upstream::info::response::UpstreamInfoResponse),
+      schemas(crate::routes::api::restricted::nginx::upstream::info::response::UpstreamListResponse),
+      schemas(crate::routes::api::restricted::nginx::upstream::info::response::UpstreamTargetInfoResponse),
+      schemas(crate::routes::api::restricted::nginx::upstream::update_upstream::UpdateUpstreamRequestBody),
+      schemas(crate::routes::api::restricted::nginx::upstream::update_upstream_target::UpdateUpstreamTargetRequestBody),
+      schemas(crate::routes::api::restricted::nginx::upstream::info::response::UpdateUpstreamInfoResponse),
+      schemas(crate::routes::api::restricted::nginx::upstream::info::response::UpdateUpstreamTargetInfoResponse),
   ),
   tags(
       (name = tag::HEALTH_TAG, description = "Health information API"),
       (name = tag::AUTH_TAG, description = "Authentication API"),
-      (name = tag::USER_TAG, description = "User management API")
+      (name = tag::USER_TAG, description = "User management API"),
+      (name = tag::NGINX_TAG, description = "Nginx management API")
   )
 )]
 pub struct ApiDoc;

apps/api/src/routes/api/restricted.rs

@@ -1,3 +1,4 @@
+pub mod nginx;
 pub mod user;
 
 use std::sync::Arc;
@@ -9,6 +10,7 @@ use crate::{middlewares::require_auth::require_auth, routes::AppState};
 pub fn get_restricted_router(state: Arc<AppState>) -> Router {
     Router::new()
         .nest("/user", user::get_user_router(state.clone()))
+        .nest("/nginx", nginx::get_nginx_router(state.clone()))
         .layer(axum::middleware::from_fn_with_state(
             state.clone(),
             require_auth,

apps/api/src/routes/api/restricted/nginx.rs

@@ -0,0 +1,11 @@
+pub mod upstream;
+
+use std::sync::Arc;
+
+use axum::Router;
+
+use crate::routes::AppState;
+
+pub fn get_nginx_router(state: Arc<AppState>) -> Router {
+    Router::new().merge(upstream::get_upstream_router(state.clone()))
+}

apps/api/src/routes/api/restricted/nginx/upstream.rs

@@ -0,0 +1,43 @@
+pub mod create_upstream;
+pub mod create_upstream_target;
+pub mod get_upstream;
+pub mod get_upstream_target;
+pub mod info;
+pub mod remove_upstream;
+pub mod remove_upstream_target;
+pub mod update_upstream;
+pub mod update_upstream_target;
+
+use std::sync::Arc;
+
+use axum::{
+    Router,
+    routing::{get, post},
+};
+
+use crate::routes::AppState;
+
+pub fn get_upstream_router(state: Arc<AppState>) -> Router {
+    Router::new()
+        .route(
+            "/upstreams",
+            get(get_upstream::get_upstream_list).post(create_upstream::create_upstream),
+        )
+        .route(
+            "/upstreams/{upstream_id}",
+            get(get_upstream::get_upstream)
+                .patch(update_upstream::update_upstream)
+                .delete(remove_upstream::remove_upstream),
+        )
+        .route(
+            "/upstreams/{upstream_id}/targets",
+            post(create_upstream_target::add_upstream_target),
+        )
+        .route(
+            "/upstream_targets/{upstream_target_id}",
+            get(get_upstream_target::get_upstream_target)
+                .patch(update_upstream_target::update_upstream_target)
+                .delete(remove_upstream_target::remove_upstream_target),
+        )
+        .with_state(state)
+}

apps/api/src/routes/api/restricted/nginx/upstream/create_upstream.rs

@@ -0,0 +1,367 @@
+use std::sync::Arc;
+
+use axum::{Json, extract::State, response::Result as AxumResult};
+use sea_orm::TransactionTrait;
+
+use crate::{
+    errors::api_error::ApiError,
+    middlewares::request_info::AuthenticatedRequestInfo,
+    routes::{
+        AppState,
+        api::{
+            openapi::tag::NGINX_TAG,
+            restricted::nginx::upstream::info::response::UpstreamInfoResponse,
+        },
+    },
+    services::nginx::info::upstream::UpstreamCreateInfo,
+};
+
+#[derive(serde::Deserialize, utoipa::ToSchema, serde::Serialize)]
+pub struct UpstreamTargetInfo {
+    pub host: String,
+    pub port: i64,
+    pub weight: Option<i64>,
+    pub is_backup: Option<bool>,
+    pub enabled: Option<bool>,
+}
+
+pub struct ConcreteUpstreamTargetInfo {
+    pub host: String,
+    pub port: i64,
+    pub weight: i64,
+    pub is_backup: bool,
+    pub enabled: bool,
+}
+
+impl From<UpstreamTargetInfo> for ConcreteUpstreamTargetInfo {
+    fn from(info: UpstreamTargetInfo) -> Self {
+        Self {
+            host: info.host,
+            port: info.port,
+            weight: info.weight.unwrap_or(1),
+            is_backup: info.is_backup.unwrap_or(false),
+            enabled: info.enabled.unwrap_or(true),
+        }
+    }
+}
+
+#[derive(serde::Deserialize, utoipa::ToSchema, serde::Serialize)]
+pub struct CreateUpstreamRequestBody {
+    pub name: String,
+    pub protocol: String,
+    pub algorithm: Option<String>,
+    pub sticky_session: Option<bool>,
+    pub upstream_targets: Vec<UpstreamTargetInfo>,
+}
+
+struct ConcreteCreateUpstreamRequestBody {
+    pub name: String,
+    pub protocol: String,
+    pub algorithm: String,
+    pub sticky_session: bool,
+    pub upstream_targets: Vec<ConcreteUpstreamTargetInfo>,
+}
+
+impl From<CreateUpstreamRequestBody> for ConcreteCreateUpstreamRequestBody {
+    fn from(payload: CreateUpstreamRequestBody) -> Self {
+        Self {
+            name: payload.name,
+            protocol: payload.protocol,
+            algorithm: payload
+                .algorithm
+                .unwrap_or_else(|| "round_robin".to_string()),
+            sticky_session: payload.sticky_session.unwrap_or(false),
+            upstream_targets: payload
+                .upstream_targets
+                .into_iter()
+                .map(|target| target.into())
+                .collect(),
+        }
+    }
+}
+
+#[axum::debug_handler]
+#[utoipa::path(
+    post,
+    path = "/api/upstreams",
+    request_body = CreateUpstreamRequestBody,
+    responses(
+        (status = 200, description = "Upstream created successfully", body = UpstreamInfoResponse),
+        (status = 401, description = "Unauthorized"),
+        (status = 422, description = "Invalid request"),
+        (status = 500, description = "Internal server error"),
+    ),
+    tag = NGINX_TAG,
+)]
+pub async fn create_upstream(
+    request_info: AuthenticatedRequestInfo,
+    State(state): State<Arc<AppState>>,
+    Json(payload): Json<CreateUpstreamRequestBody>,
+) -> AxumResult<Json<UpstreamInfoResponse>, ApiError> {
+    let upstream_service = &state.service.nginx.get_upstream_service();
+    let concrete_payload: ConcreteCreateUpstreamRequestBody = payload.into();
+
+    let create_info = UpstreamCreateInfo {
+        name: concrete_payload.name,
+        protocol: concrete_payload.protocol,
+        algorithm: concrete_payload.algorithm,
+        sticky_session: concrete_payload.sticky_session,
+        created_by: Some(request_info.user_id),
+        upstream_targets: concrete_payload
+            .upstream_targets
+            .into_iter()
+            .map(
+                |target| crate::services::nginx::info::upstream_target::UpstreamTargetCreateInfo {
+                    target_host: target.host,
+                    target_port: target.port,
+                    weight: target.weight,
+                    is_backup: target.is_backup,
+                    enabled: target.enabled,
+                    upstream_id: uuid::Uuid::nil(), // Placeholder, will be set in service
+                },
+            )
+            .collect(),
+    };
+
+    let mut tx = state.database_connection.begin().await?;
+    let upstream_info = upstream_service
+        .create_upstream(create_info, Some(&mut tx))
+        .await?;
+
+    state
+        .service
+        .nginx
+        .regenerate_and_apply_config(state.service.agent_client.clone(), Some(&mut tx))
+        .await?;
+
+    tx.commit().await?;
+
+    Ok(Json(upstream_info.into()))
+}
+
+#[cfg(test)]
+mod tests {
+    use std::sync::Arc;
+
+    use axum::http::StatusCode;
+    use axum_test::TestServer;
+    use sea_orm::{DatabaseBackend, DatabaseConnection, MockDatabase};
+
+    use database::generated::entities::{upstream, upstream_target};
+
+    use crate::{
+        configs::{FromConfig, ProgramSettings},
+        middlewares::require_auth::mock::REQUEST_AUTH_USER_INVALID_HEADER,
+        routes::api::restricted::nginx::upstream::{
+            create_upstream::{CreateUpstreamRequestBody, UpstreamTargetInfo as ReqTarget},
+            get_upstream_router,
+        },
+        services::{agent_client::MockAgentService, get_mock_app_service},
+    };
+
+    fn get_router_with_state(db: DatabaseConnection) -> axum::Router {
+        let program_settings = ProgramSettings::mock();
+        let mut mock = MockAgentService::new();
+        mock.expect_validate().returning(|_cfg| Ok(()));
+        mock.expect_apply().returning(|_cfg| Ok(()));
+        let mock_agent = Arc::new(mock);
+        let app_service =
+            get_mock_app_service(&Arc::new(db.clone()), &program_settings, mock_agent);
+        let state = Arc::new(crate::routes::AppState {
+            database_connection: Arc::new(db),
+            service: Arc::new(app_service),
+            config: Arc::new(program_settings),
+        });
+        get_upstream_router(state).layer(axum::middleware::from_fn(
+            crate::middlewares::require_auth::mock::mock_require_auth,
+        ))
+    }
+
+    #[tokio::test]
+    async fn handler_create_upstream_succeeds_returns_created() {
+        let up_id = uuid::Uuid::new_v4();
+
+        let up_model = upstream::Model {
+            id: up_id,
+            name: "new_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "round_robin".to_string(),
+            sticky_session: false,
+            created_by: Some(uuid::Uuid::new_v4()),
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let target_id = uuid::Uuid::new_v4();
+        let target_model = upstream_target::Model {
+            id: target_id,
+            upstream_id: up_id,
+            target_host: "127.0.0.1".to_string(),
+            target_port: 8080,
+            weight: 1,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        // service will likely perform an insert and then query to return created models
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![vec![up_model.clone()]])
+            .append_query_results(vec![vec![target_model.clone()]])
+            // additional query result for regenerate_and_apply_config -> generate_config
+            // `find_with_related` returns rows of `(upstream, Option<target>)` which
+            // the mock DB expects as `(Model, Option<Model>)` per row.
+            .append_query_results(vec![vec![(up_model.clone(), Some(target_model.clone()))]])
+            .into_connection();
+
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let payload = CreateUpstreamRequestBody {
+            name: "new_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: None,
+            sticky_session: None,
+            upstream_targets: vec![ReqTarget {
+                host: "127.0.0.1".to_string(),
+                port: 8080,
+                weight: None,
+                is_backup: None,
+                enabled: None,
+            }],
+        };
+
+        let res = server.post("/upstreams").json(&payload).await;
+
+        res.assert_status_ok();
+        let text = res.text();
+        let body: crate::routes::api::restricted::nginx::upstream::info::response::UpstreamInfoResponse =
+            serde_json::from_str(&text).expect("failed to parse json");
+
+        assert_eq!(body.id, up_id);
+        assert_eq!(body.name, "new_upstream");
+        assert_eq!(body.protocol, "http");
+        assert_eq!(body.upstream_targets.len(), 1);
+        assert_eq!(body.upstream_targets[0].id, target_id);
+    }
+
+    #[tokio::test]
+    async fn handler_create_upstream_invalid_payload_returns_bad_request() {
+        let db = MockDatabase::new(DatabaseBackend::Sqlite).into_connection();
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        // missing required fields -> send empty object
+        let res = server.post("/upstreams").json(&serde_json::json!({})).await;
+        res.assert_status(StatusCode::UNPROCESSABLE_ENTITY);
+    }
+
+    #[tokio::test]
+    async fn handler_create_upstream_agent_error_returns_internal() {
+        let up_id = uuid::Uuid::new_v4();
+
+        let up_model = upstream::Model {
+            id: up_id,
+            name: "new_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "round_robin".to_string(),
+            sticky_session: false,
+            created_by: Some(uuid::Uuid::new_v4()),
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let target_id = uuid::Uuid::new_v4();
+        let target_model = upstream_target::Model {
+            id: target_id,
+            upstream_id: up_id,
+            target_host: "127.0.0.1".to_string(),
+            target_port: 8080,
+            weight: 1,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        // configure mock agent to error on apply
+        let mut mock = MockAgentService::new();
+        mock.expect_validate().returning(|_cfg| Ok(()));
+        mock.expect_apply().returning(|_cfg| {
+            Err(
+                crate::services::agent_client::AgentError::ApplicationFailed(
+                    "internal".to_string(),
+                    "Failed to communicate with the agent.".to_string(),
+                ),
+            )
+        });
+        let mock_agent = Arc::new(mock);
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![vec![up_model.clone()]])
+            .append_query_results(vec![vec![target_model.clone()]])
+            .append_query_results(vec![vec![(up_model.clone(), Some(target_model.clone()))]])
+            .into_connection();
+
+        let program_settings = ProgramSettings::mock();
+        let app_service =
+            get_mock_app_service(&Arc::new(db.clone()), &program_settings, mock_agent);
+        let state = Arc::new(crate::routes::AppState {
+            database_connection: Arc::new(db),
+            service: Arc::new(app_service),
+            config: Arc::new(program_settings),
+        });
+
+        let router = get_upstream_router(state).layer(axum::middleware::from_fn(
+            crate::middlewares::require_auth::mock::mock_require_auth,
+        ));
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let payload = CreateUpstreamRequestBody {
+            name: "new_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: None,
+            sticky_session: None,
+            upstream_targets: vec![ReqTarget {
+                host: "127.0.0.1".to_string(),
+                port: 8080,
+                weight: None,
+                is_backup: None,
+                enabled: None,
+            }],
+        };
+
+        let res = server.post("/upstreams").json(&payload).await;
+        res.assert_status(axum::http::StatusCode::INTERNAL_SERVER_ERROR);
+    }
+
+    #[tokio::test]
+    async fn handler_create_upstream_unauthenticated_returns_unauthorized() {
+        let db = MockDatabase::new(DatabaseBackend::Sqlite).into_connection();
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let payload = CreateUpstreamRequestBody {
+            name: "new_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: None,
+            sticky_session: None,
+            upstream_targets: vec![ReqTarget {
+                host: "127.0.0.1".to_string(),
+                port: 8080,
+                weight: None,
+                is_backup: None,
+                enabled: None,
+            }],
+        };
+
+        let res = server
+            .post("/upstreams")
+            .add_header(REQUEST_AUTH_USER_INVALID_HEADER, "true")
+            .json(&payload)
+            .await;
+
+        res.assert_status(StatusCode::UNAUTHORIZED);
+    }
+}

apps/api/src/routes/api/restricted/nginx/upstream/create_upstream_target.rs

@@ -0,0 +1,310 @@
+use std::sync::Arc;
+
+use axum::{Json, extract::State, response::Result as AxumResult};
+use sea_orm::TransactionTrait;
+
+use crate::{
+    errors::api_error::ApiError,
+    middlewares::request_info::AuthenticatedRequestInfo,
+    routes::{
+        AppState,
+        api::{
+            openapi::tag::NGINX_TAG,
+            restricted::nginx::upstream::info::response::UpstreamTargetInfoResponse,
+        },
+    },
+    services::nginx::info::upstream_target::UpstreamTargetCreateInfo,
+};
+
+#[derive(serde::Deserialize, utoipa::ToSchema, serde::Serialize)]
+pub struct CreateUpstreamTargetInfo {
+    pub upstream_id: uuid::Uuid,
+    pub host: String,
+    pub port: i64,
+    pub weight: Option<i64>,
+    pub is_backup: Option<bool>,
+    pub enabled: Option<bool>,
+}
+
+pub struct ConcreteCreateUpstreamTargetInfo {
+    pub upstream_id: uuid::Uuid,
+    pub host: String,
+    pub port: i64,
+    pub weight: i64,
+    pub is_backup: bool,
+    pub enabled: bool,
+}
+
+impl From<CreateUpstreamTargetInfo> for ConcreteCreateUpstreamTargetInfo {
+    fn from(info: CreateUpstreamTargetInfo) -> Self {
+        Self {
+            upstream_id: info.upstream_id,
+            host: info.host,
+            port: info.port,
+            weight: info.weight.unwrap_or(1),
+            is_backup: info.is_backup.unwrap_or(false),
+            enabled: info.enabled.unwrap_or(true),
+        }
+    }
+}
+
+#[axum::debug_handler]
+#[utoipa::path(
+    post,
+    path = "/api/upstreams/{upstream_id}/targets",
+    request_body = CreateUpstreamTargetInfo,
+    responses(
+        (status = 200, description = "Upstream target created successfully", body = UpstreamTargetInfoResponse),
+        (status = 401, description = "Unauthorized"),
+        (status = 422, description = "Invalid request"),
+        (status = 500, description = "Internal server error"),
+    ),
+    tag = NGINX_TAG,
+)]
+pub async fn add_upstream_target(
+    _request_info: AuthenticatedRequestInfo,
+    State(state): State<Arc<AppState>>,
+    Json(payload): Json<CreateUpstreamTargetInfo>,
+) -> AxumResult<Json<UpstreamTargetInfoResponse>, ApiError> {
+    let upstream_service = &state.service.nginx.get_upstream_service();
+    let concrete_payload: ConcreteCreateUpstreamTargetInfo = payload.into();
+
+    let create_info = UpstreamTargetCreateInfo {
+        weight: concrete_payload.weight,
+        is_backup: concrete_payload.is_backup,
+        enabled: concrete_payload.enabled,
+        target_host: concrete_payload.host,
+        target_port: concrete_payload.port,
+        upstream_id: concrete_payload.upstream_id,
+    };
+
+    let mut tx = state.database_connection.begin().await?;
+    let upstream_info = upstream_service
+        .create_upstream_target(create_info, Some(&mut tx))
+        .await?;
+
+    state
+        .service
+        .nginx
+        .regenerate_and_apply_config(state.service.agent_client.clone(), Some(&mut tx))
+        .await?;
+
+    tx.commit().await?;
+
+    Ok(Json(upstream_info.into()))
+}
+
+#[cfg(test)]
+mod tests {
+    use std::sync::Arc;
+
+    use axum::http::StatusCode;
+    use axum_test::TestServer;
+    use sea_orm::{DatabaseBackend, DatabaseConnection, MockDatabase};
+
+    use database::generated::entities::{upstream, upstream_target};
+
+    use crate::{
+        configs::{FromConfig, ProgramSettings},
+        middlewares::require_auth::mock::REQUEST_AUTH_USER_INVALID_HEADER,
+        routes::api::restricted::nginx::upstream::{
+            create_upstream_target::CreateUpstreamTargetInfo, get_upstream_router,
+        },
+        services::{agent_client::MockAgentService, get_mock_app_service},
+    };
+
+    fn get_router_with_state(db: DatabaseConnection) -> axum::Router {
+        let program_settings = ProgramSettings::mock();
+        let mut mock = MockAgentService::new();
+        mock.expect_validate().returning(|_cfg| Ok(()));
+        mock.expect_apply().returning(|_cfg| Ok(()));
+        let mock_agent = Arc::new(mock);
+        let app_service =
+            get_mock_app_service(&Arc::new(db.clone()), &program_settings, mock_agent);
+        let state = Arc::new(crate::routes::AppState {
+            database_connection: Arc::new(db),
+            service: Arc::new(app_service),
+            config: Arc::new(program_settings),
+        });
+        get_upstream_router(state).layer(axum::middleware::from_fn(
+            crate::middlewares::require_auth::mock::mock_require_auth,
+        ))
+    }
+
+    #[tokio::test]
+    async fn handler_add_upstream_target_agent_error_returns_internal() {
+        let up_id = uuid::Uuid::new_v4();
+
+        let target_id = uuid::Uuid::new_v4();
+        let target_model = upstream_target::Model {
+            id: target_id,
+            upstream_id: up_id,
+            target_host: "127.0.0.1".to_string(),
+            target_port: 8080,
+            weight: 1,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let up_model = upstream::Model {
+            id: up_id,
+            name: "test_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "round_robin".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        // configure mock agent to return an error on apply
+        let mut mock = MockAgentService::new();
+        mock.expect_validate().returning(|_cfg| Ok(()));
+        mock.expect_apply().returning(|_cfg| {
+            Err(
+                crate::services::agent_client::AgentError::ApplicationFailed(
+                    "internal".to_string(),
+                    "Failed to communicate with the agent.".to_string(),
+                ),
+            )
+        });
+        let mock_agent = Arc::new(mock);
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![vec![target_model.clone()]])
+            .append_query_results(vec![vec![(up_model.clone(), Some(target_model.clone()))]])
+            .into_connection();
+
+        let program_settings = ProgramSettings::mock();
+        let app_service =
+            get_mock_app_service(&Arc::new(db.clone()), &program_settings, mock_agent);
+        let state = Arc::new(crate::routes::AppState {
+            database_connection: Arc::new(db),
+            service: Arc::new(app_service),
+            config: Arc::new(program_settings),
+        });
+
+        let router = get_upstream_router(state).layer(axum::middleware::from_fn(
+            crate::middlewares::require_auth::mock::mock_require_auth,
+        ));
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let payload = CreateUpstreamTargetInfo {
+            upstream_id: up_id,
+            host: "127.0.0.1".to_string(),
+            port: 8080,
+            weight: None,
+            is_backup: None,
+            enabled: None,
+        };
+
+        let res = server
+            .post(&format!("/upstreams/{}/targets", up_id))
+            .json(&payload)
+            .await;
+
+        res.assert_status(axum::http::StatusCode::INTERNAL_SERVER_ERROR);
+    }
+
+    #[tokio::test]
+    async fn handler_add_upstream_target_succeeds_returns_created() {
+        let up_id = uuid::Uuid::new_v4();
+
+        let target_id = uuid::Uuid::new_v4();
+        let target_model = upstream_target::Model {
+            id: target_id,
+            upstream_id: up_id,
+            target_host: "127.0.0.1".to_string(),
+            target_port: 8080,
+            weight: 1,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let up_model = upstream::Model {
+            id: up_id,
+            name: "test_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "round_robin".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![vec![target_model.clone()]])
+            // additional query result for regenerate_and_apply_config -> generate_config
+            .append_query_results(vec![vec![(up_model.clone(), Some(target_model.clone()))]])
+            .into_connection();
+
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let payload = CreateUpstreamTargetInfo {
+            upstream_id: up_id,
+            host: "127.0.0.1".to_string(),
+            port: 8080,
+            weight: None,
+            is_backup: None,
+            enabled: None,
+        };
+
+        let res = server
+            .post(&format!("/upstreams/{}/targets", up_id))
+            .json(&payload)
+            .await;
+
+        res.assert_status_ok();
+        let text = res.text();
+        let body: crate::routes::api::restricted::nginx::upstream::info::response::UpstreamTargetInfoResponse =
+            serde_json::from_str(&text).expect("failed to parse json");
+
+        assert_eq!(body.id, target_id);
+        assert_eq!(body.host, "127.0.0.1");
+        assert_eq!(body.port, 8080);
+        assert_eq!(body.upstream_id, up_id);
+    }
+
+    #[tokio::test]
+    async fn handler_add_upstream_target_invalid_payload_returns_bad_request() {
+        let db = MockDatabase::new(DatabaseBackend::Sqlite).into_connection();
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let res = server
+            .post(&format!("/upstreams/{}/targets", uuid::Uuid::new_v4()))
+            .json(&serde_json::json!({}))
+            .await;
+
+        res.assert_status(StatusCode::UNPROCESSABLE_ENTITY);
+    }
+
+    #[tokio::test]
+    async fn handler_add_upstream_target_unauthenticated_returns_unauthorized() {
+        let db = MockDatabase::new(DatabaseBackend::Sqlite).into_connection();
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let payload = CreateUpstreamTargetInfo {
+            upstream_id: uuid::Uuid::new_v4(),
+            host: "127.0.0.1".to_string(),
+            port: 8080,
+            weight: None,
+            is_backup: None,
+            enabled: None,
+        };
+
+        let res = server
+            .post(&format!("/upstreams/{}/targets", payload.upstream_id))
+            .add_header(REQUEST_AUTH_USER_INVALID_HEADER, "true")
+            .json(&payload)
+            .await;
+
+        res.assert_status(StatusCode::UNAUTHORIZED);
+    }
+}

apps/api/src/routes/api/restricted/nginx/upstream/get_upstream.rs

@@ -0,0 +1,308 @@
+use std::sync::Arc;
+
+use axum::{
+    Json,
+    extract::{Path, Query, State},
+    response::Result as AxumResult,
+};
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+use crate::{
+    errors::{api_error::ApiError, service_error::ServiceError},
+    routes::{
+        AppState,
+        api::{
+            helper::pagination::{ExtractPagination, PaginationInfo},
+            openapi::tag::NGINX_TAG,
+            restricted::nginx::upstream::info::response::{
+                UpstreamInfoResponse, UpstreamListResponse,
+            },
+        },
+    },
+    services::nginx::upstream::GetUpstreamOptions,
+};
+
+#[derive(Serialize, Deserialize, utoipa::ToSchema)]
+pub struct GetUpstreamParams {
+    pub include_targets: Option<bool>,
+}
+
+pub struct ConcreteGetUpstreamParams {
+    pub include_targets: bool,
+}
+
+impl From<GetUpstreamParams> for ConcreteGetUpstreamParams {
+    fn from(params: GetUpstreamParams) -> Self {
+        Self {
+            include_targets: params.include_targets.unwrap_or(false),
+        }
+    }
+}
+
+#[utoipa::path(
+    get,
+    path = "/api/upstreams",
+    responses(
+        (status = 200, description = "List upstreams", body = UpstreamListResponse),
+        (status = 500, description = "Internal server error"),
+    ),
+    tag = NGINX_TAG,
+)]
+pub async fn get_upstream_list(
+    ExtractPagination(pagination): ExtractPagination,
+    State(state): State<Arc<AppState>>,
+) -> AxumResult<Json<UpstreamListResponse>, ServiceError> {
+    let upstream_service = &state.service.nginx.get_upstream_service();
+    let upstreams = upstream_service
+        .get_upstreams(Some(pagination.clone().into()), None)
+        .await?;
+
+    //
+    Ok(Json(UpstreamListResponse {
+        items: upstreams.into_iter().map(|u| u.into()).collect(),
+        pagination: PaginationInfo {
+            total_items: 0,
+            total_pages: 0,
+            current_page: pagination.page,
+            per_page: pagination.per_page,
+        },
+    }))
+}
+
+#[utoipa::path(
+    get,
+    path = "/api/upstreams/{upstream_id}",
+    responses(
+        (status = 200, description = "Get upstream info", body = UpstreamInfoResponse),
+        (status = 404, description = "Not found"),
+        (status = 500, description = "Internal server error"),
+    ),
+    tag = NGINX_TAG,
+)]
+pub async fn get_upstream(
+    Path(upstream_id): Path<Uuid>,
+    Query(params): Query<GetUpstreamParams>,
+    State(_state): State<Arc<AppState>>,
+) -> AxumResult<Json<UpstreamInfoResponse>, ApiError> {
+    let concrete_params: ConcreteGetUpstreamParams = params.into();
+    let upstream_service = &_state.service.nginx.get_upstream_service();
+    let upstream_info = if concrete_params.include_targets {
+        upstream_service
+            .get_upstream(
+                upstream_id,
+                Some(GetUpstreamOptions {
+                    include_targets: true,
+                }),
+                None,
+            )
+            .await?
+    } else {
+        upstream_service
+            .get_upstream(upstream_id, None, None)
+            .await?
+    };
+
+    //
+    Ok(Json(upstream_info.into()))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::sync::Arc;
+
+    use axum::http::StatusCode;
+    use axum_test::TestServer;
+    use sea_orm::{DatabaseBackend, DatabaseConnection, MockDatabase};
+
+    use database::generated::entities::{upstream, upstream_target};
+
+    use crate::configs::{FromConfig, ProgramSettings};
+
+    use crate::routes::api::restricted::nginx::upstream::get_upstream_router;
+    use crate::routes::api::restricted::nginx::upstream::info::response::UpstreamInfoResponse;
+    use crate::services::get_app_service;
+
+    fn get_router_with_state(db: DatabaseConnection) -> axum::Router {
+        let program_settings = ProgramSettings::mock();
+        let app_service = get_app_service(&Arc::new(db.clone()), &program_settings);
+        let state = Arc::new(crate::routes::AppState {
+            database_connection: Arc::new(db),
+            service: Arc::new(app_service),
+            config: Arc::new(program_settings),
+        });
+        get_upstream_router(state)
+    }
+
+    #[tokio::test]
+    async fn handler_get_upstream_list_returns_list() {
+        let u1 = upstream::Model {
+            id: uuid::Uuid::new_v4(),
+            name: "u1".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "rr".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+        let u2 = upstream::Model {
+            id: uuid::Uuid::new_v4(),
+            name: "u2".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "rr".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![vec![u1.clone(), u2.clone()]])
+            .into_connection();
+
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let res = server.get("/upstreams").await;
+        res.assert_status_ok();
+        let body = res.json::<UpstreamListResponse>();
+        assert_eq!(body.items.len(), 2);
+        assert_eq!(body.pagination.current_page, 1u32);
+    }
+
+    #[tokio::test]
+    async fn handler_get_upstream_with_targets_returns_targets() {
+        let up_id = uuid::Uuid::new_v4();
+
+        let up_model = upstream::Model {
+            id: up_id,
+            name: "with_targets".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "least_conn".to_string(),
+            sticky_session: true,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let target_model = upstream_target::Model {
+            id: uuid::Uuid::new_v4(),
+            upstream_id: up_id,
+            target_host: "127.0.0.1".to_string(),
+            target_port: 8080,
+            weight: 1,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            // find_by_id -> returns upstream model
+            .append_query_results(vec![vec![up_model.clone()]])
+            // find targets -> returns the target(s)
+            .append_query_results(vec![vec![target_model.clone()]])
+            .into_connection();
+
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let url = format!("/upstreams/{}?include_targets=true", up_id);
+        let res = server.get(&url).await;
+        res.assert_status_ok();
+        let body = res.json::<UpstreamInfoResponse>();
+        assert_eq!(body.id, up_id);
+        assert_eq!(body.upstream_targets.len(), 1);
+        assert_eq!(body.upstream_targets[0].target_host, "127.0.0.1");
+    }
+
+    #[tokio::test]
+    async fn extractor_pagination_validation_rejects_bad_values() {
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![Vec::<sea_orm::MockRow>::new()])
+            .into_connection();
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        // page = 0 should be rejected
+        let res = server.get("/upstreams?page=0&per_page=10").await;
+        res.assert_status(StatusCode::BAD_REQUEST);
+
+        // per_page out of range should be rejected
+        let res = server.get("/upstreams?page=1&per_page=0").await;
+        res.assert_status(StatusCode::BAD_REQUEST);
+
+        // valid values accepted
+        let res = server.get("/upstreams?page=2&per_page=5").await;
+        res.assert_status_ok();
+        let body = res.json::<UpstreamListResponse>();
+        assert_eq!(body.pagination.current_page, 2u32);
+        assert_eq!(body.pagination.per_page, 5u32);
+    }
+
+    #[tokio::test]
+    async fn handler_get_upstream_not_found_returns_service_error() {
+        let up_id = uuid::Uuid::new_v4();
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![Vec::<sea_orm::MockRow>::new()])
+            .into_connection();
+
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let url = format!("/upstreams/{}?include_targets=false", up_id);
+        let res = server.get(&url).await;
+        res.assert_status(StatusCode::NOT_FOUND);
+    }
+
+    #[tokio::test]
+    async fn handler_get_upstream_without_targets_returns_info() {
+        let up_id = uuid::Uuid::new_v4();
+
+        let up_model = upstream::Model {
+            id: up_id,
+            name: "simple_up".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "rr".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            // find_by_id -> returns upstream model
+            .append_query_results(vec![vec![up_model.clone()]])
+            .into_connection();
+
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        // include_targets omitted -> should not include targets
+        let url = format!("/upstreams/{}", up_id);
+        let res = server.get(&url).await;
+        res.assert_status_ok();
+        let body = res.json::<UpstreamInfoResponse>();
+        assert_eq!(body.id, up_id);
+        assert!(body.upstream_targets.is_empty());
+    }
+
+    #[tokio::test]
+    async fn handler_get_upstream_list_empty_returns_empty_items() {
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![Vec::<sea_orm::MockRow>::new()])
+            .into_connection();
+
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let res = server.get("/upstreams?page=3&per_page=10").await;
+        res.assert_status_ok();
+        let body = res.json::<UpstreamListResponse>();
+        assert_eq!(body.items.len(), 0);
+        assert_eq!(body.pagination.current_page, 3u32);
+        assert_eq!(body.pagination.per_page, 10u32);
+    }
+}

apps/api/src/routes/api/restricted/nginx/upstream/get_upstream_target.rs

@@ -0,0 +1,193 @@
+use std::sync::Arc;
+
+use axum::{
+    Json,
+    extract::{Path, Query, State},
+    response::Result as AxumResult,
+};
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+use crate::{
+    errors::api_error::ApiError,
+    routes::{
+        AppState,
+        api::{
+            openapi::tag::NGINX_TAG,
+            restricted::nginx::upstream::info::response::UpstreamTargetInfo,
+        },
+    },
+};
+
+#[derive(Serialize, Deserialize, utoipa::ToSchema)]
+pub struct GetUpstreamTargetsParams {
+    pub include_upstream: Option<bool>,
+}
+
+pub struct ConcreteGetUpstreamTargetsParams {
+    pub include_upstream: bool,
+}
+
+impl From<GetUpstreamTargetsParams> for ConcreteGetUpstreamTargetsParams {
+    fn from(params: GetUpstreamTargetsParams) -> Self {
+        Self {
+            include_upstream: params.include_upstream.unwrap_or(false),
+        }
+    }
+}
+
+#[utoipa::path(
+    get,
+    path = "/api/upstream_targets/{upstream_target_id}",
+    responses(
+        (status = 200, description = "Get upstream target info", body = UpstreamTargetInfo),
+        (status = 404, description = "Not found"),
+        (status = 500, description = "Internal server error"),
+    ),
+    tag = NGINX_TAG,
+)]
+pub async fn get_upstream_target(
+    Path(upstream_target_id): Path<Uuid>,
+    Query(params): Query<GetUpstreamTargetsParams>,
+    State(_state): State<Arc<AppState>>,
+) -> AxumResult<Json<UpstreamTargetInfo>, ApiError> {
+    let concrete_params: ConcreteGetUpstreamTargetsParams = params.into();
+    let upstream_service = &_state.service.nginx.get_upstream_service();
+    let upstream_target_info = upstream_service
+        .get_upstream_target(
+            upstream_target_id,
+            if concrete_params.include_upstream {
+                Some(crate::services::nginx::upstream::GetUpstreamTargetOptions {
+                    include_upstream: true,
+                })
+            } else {
+                None
+            },
+            None,
+        )
+        .await?;
+    Ok(Json(upstream_target_info.into()))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::sync::Arc;
+
+    use axum::http::StatusCode;
+    use axum_test::TestServer;
+    use sea_orm::{DatabaseBackend, DatabaseConnection, MockDatabase};
+
+    use database::generated::entities::{upstream, upstream_target};
+
+    use crate::configs::{FromConfig, ProgramSettings};
+
+    use crate::routes::api::restricted::nginx::upstream::get_upstream_router;
+    use crate::services::get_app_service;
+
+    fn get_router_with_state(db: DatabaseConnection) -> axum::Router {
+        let program_settings = ProgramSettings::mock();
+        let app_service = get_app_service(&Arc::new(db.clone()), &program_settings);
+        let state = Arc::new(crate::routes::AppState {
+            database_connection: Arc::new(db),
+            service: Arc::new(app_service),
+            config: Arc::new(program_settings),
+        });
+        get_upstream_router(state)
+    }
+
+    #[tokio::test]
+    async fn handler_get_upstream_target_with_upstream_returns_upstream() {
+        let up_id = uuid::Uuid::new_v4();
+
+        let up_model = upstream::Model {
+            id: up_id,
+            name: "with_targets".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "least_conn".to_string(),
+            sticky_session: true,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let target_id = uuid::Uuid::new_v4();
+        let target_model = upstream_target::Model {
+            id: target_id,
+            upstream_id: up_id,
+            target_host: "127.0.0.1".to_string(),
+            target_port: 8080,
+            weight: 1,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            // query returns joined (upstream_target, upstream)
+            .append_query_results(vec![vec![(target_model.clone(), Some(up_model.clone()))]])
+            .into_connection();
+
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let url = format!("/upstream_targets/{}?include_upstream=true", target_id);
+        let res = server.get(&url).await;
+        res.assert_status_ok();
+        let text = res.text();
+        let body: UpstreamTargetInfo = serde_json::from_str(&text).expect("failed to parse json");
+        assert_eq!(body.upstream_id, up_id);
+        assert!(body.upstream.is_some());
+        let upstream = body.upstream.expect("upstream to be present");
+        assert_eq!(upstream.id, up_id);
+        assert_eq!(upstream.name, "with_targets");
+    }
+
+    #[tokio::test]
+    async fn handler_get_upstream_target_without_upstream_returns_info() {
+        let target_id = uuid::Uuid::new_v4();
+
+        let target_model = upstream_target::Model {
+            id: target_id,
+            upstream_id: uuid::Uuid::new_v4(),
+            target_host: "10.0.0.1".to_string(),
+            target_port: 9090,
+            weight: 5,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![vec![target_model.clone()]])
+            .into_connection();
+
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let url = format!("/upstream_targets/{}", target_id);
+        let res = server.get(&url).await;
+        res.assert_status_ok();
+        let text = res.text();
+        let body: UpstreamTargetInfo = serde_json::from_str(&text).expect("failed to parse json");
+        assert_eq!(body.id, target_id);
+        assert!(body.upstream.is_none());
+    }
+
+    #[tokio::test]
+    async fn handler_get_upstream_target_not_found_returns_service_error() {
+        let target_id = uuid::Uuid::new_v4();
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![Vec::<sea_orm::MockRow>::new()])
+            .into_connection();
+
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let url = format!("/upstream_targets/{}?include_upstream=false", target_id);
+        let res = server.get(&url).await;
+        res.assert_status(StatusCode::NOT_FOUND);
+    }
+}

apps/api/src/routes/api/restricted/nginx/upstream/info.rs

@@ -0,0 +1 @@
+pub mod response;

apps/api/src/routes/api/restricted/nginx/upstream/info/response.rs

@@ -0,0 +1,232 @@
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+use crate::routes::api::helper::pagination::PaginationInfo;
+
+#[derive(Serialize, Deserialize, utoipa::ToSchema)]
+pub struct UpstreamTargetInfo {
+    pub id: uuid::Uuid,
+    pub target_host: String,
+    pub target_port: i64,
+    pub enabled: bool,
+    pub is_backup: bool,
+    pub weight: i32,
+    //
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+    //
+    pub upstream_id: Uuid,
+    pub upstream: Option<UpstreamBasicInfo>,
+}
+
+#[derive(Serialize, Deserialize, utoipa::ToSchema)]
+pub struct UpstreamBasicInfo {
+    pub id: Uuid,
+    pub name: String,
+    pub protocol: String,
+    //
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+}
+
+impl From<crate::services::nginx::info::upstream_target::UpstreamTargetInfo>
+    for UpstreamTargetInfo
+{
+    fn from(info: crate::services::nginx::info::upstream_target::UpstreamTargetInfo) -> Self {
+        Self {
+            id: info.id,
+            target_host: info.target_host,
+            target_port: info.target_port,
+            enabled: info.enabled,
+            is_backup: info.is_backup,
+            weight: info.weight as i32,
+            //
+            created_at: info.created_at,
+            updated_at: info.updated_at,
+            //
+            upstream_id: info.upstream_id,
+            upstream: info.upstream.map(|u| UpstreamBasicInfo {
+                id: u.id,
+                name: u.name,
+                protocol: u.protocol,
+                created_at: u.created_at,
+                updated_at: u.updated_at,
+            }),
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize, utoipa::ToSchema)]
+pub struct UpstreamTargetBasicInfo {
+    pub id: uuid::Uuid,
+    pub target_host: String,
+    pub target_port: i64,
+    pub enabled: bool,
+    pub is_backup: bool,
+    pub weight: i32,
+    //
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+}
+
+impl From<crate::services::nginx::info::upstream_target::UpstreamTargetInfo>
+    for UpstreamTargetBasicInfo
+{
+    fn from(info: crate::services::nginx::info::upstream_target::UpstreamTargetInfo) -> Self {
+        Self {
+            id: info.id,
+            target_host: info.target_host,
+            target_port: info.target_port,
+            enabled: info.enabled,
+            is_backup: info.is_backup,
+            weight: info.weight as i32,
+            //
+            created_at: info.created_at,
+            updated_at: info.updated_at,
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize, utoipa::ToSchema)]
+pub struct UpstreamInfoResponse {
+    pub id: uuid::Uuid,
+    pub name: String,
+    pub protocol: String,
+    pub algorithm: String,
+    pub sticky_session: bool,
+    pub created_by: Option<uuid::Uuid>,
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+    //
+    pub upstream_targets: Vec<UpstreamTargetBasicInfo>,
+}
+
+impl From<crate::services::nginx::info::upstream::UpstreamInfo> for UpstreamInfoResponse {
+    fn from(info: crate::services::nginx::info::upstream::UpstreamInfo) -> Self {
+        Self {
+            id: info.id,
+            name: info.name,
+            protocol: info.protocol,
+            algorithm: info.algorithm,
+            sticky_session: info.sticky_session,
+            created_by: info.created_by,
+            created_at: info.created_at,
+            updated_at: info.updated_at,
+            upstream_targets: info
+                .upstream_targets
+                .into_iter()
+                .map(|t| t.into())
+                .collect(),
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize, utoipa::ToSchema)]
+pub struct UpstreamListResponse {
+    pub items: Vec<UpstreamInfoResponse>,
+    pub pagination: PaginationInfo,
+}
+
+#[derive(Serialize, Deserialize, utoipa::ToSchema)]
+pub struct UpstreamTargetInfoResponse {
+    pub id: uuid::Uuid,
+    pub host: String,
+    pub port: i64,
+    pub enabled: bool,
+    pub is_backup: bool,
+    pub weight: i32,
+    //
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+    //
+    pub upstream_id: Uuid,
+}
+
+impl From<crate::services::nginx::info::upstream_target::UpstreamTargetInfo>
+    for UpstreamTargetInfoResponse
+{
+    fn from(info: crate::services::nginx::info::upstream_target::UpstreamTargetInfo) -> Self {
+        Self {
+            id: info.id,
+            host: info.target_host,
+            port: info.target_port,
+            enabled: info.enabled,
+            is_backup: info.is_backup,
+            weight: info.weight as i32,
+            //
+            created_at: info.created_at,
+            updated_at: info.updated_at,
+            //
+            upstream_id: info.upstream_id,
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize, utoipa::ToSchema)]
+pub struct UpdateUpstreamInfoResponse {
+    pub id: uuid::Uuid,
+    pub name: String,
+    pub protocol: String,
+    pub algorithm: String,
+    pub sticky_session: bool,
+    pub created_by: Option<uuid::Uuid>,
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+    //
+    pub upstream_targets: Vec<UpstreamTargetBasicInfo>,
+}
+
+impl From<crate::services::nginx::info::upstream::UpstreamInfo> for UpdateUpstreamInfoResponse {
+    fn from(info: crate::services::nginx::info::upstream::UpstreamInfo) -> Self {
+        Self {
+            id: info.id,
+            name: info.name,
+            protocol: info.protocol,
+            algorithm: info.algorithm,
+            sticky_session: info.sticky_session,
+            created_by: info.created_by,
+            created_at: info.created_at,
+            updated_at: info.updated_at,
+            upstream_targets: info
+                .upstream_targets
+                .into_iter()
+                .map(|t| t.into())
+                .collect(),
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize, utoipa::ToSchema)]
+pub struct UpdateUpstreamTargetInfoResponse {
+    pub id: uuid::Uuid,
+    pub host: String,
+    pub port: i64,
+    pub enabled: bool,
+    pub is_backup: bool,
+    pub weight: i32,
+    //
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+    //
+    pub upstream_id: Uuid,
+}
+
+impl From<crate::services::nginx::info::upstream_target::UpstreamTargetInfo>
+    for UpdateUpstreamTargetInfoResponse
+{
+    fn from(info: crate::services::nginx::info::upstream_target::UpstreamTargetInfo) -> Self {
+        Self {
+            id: info.id,
+            host: info.target_host,
+            port: info.target_port,
+            enabled: info.enabled,
+            is_backup: info.is_backup,
+            weight: info.weight as i32,
+            //
+            created_at: info.created_at,
+            updated_at: info.updated_at,
+            upstream_id: info.upstream_id,
+        }
+    }
+}

apps/api/src/routes/api/restricted/nginx/upstream/remove_upstream.rs

@@ -0,0 +1,238 @@
+use std::sync::Arc;
+
+use axum::{
+    Json,
+    extract::{Path, State},
+    response::Result as AxumResult,
+};
+use sea_orm::TransactionTrait;
+use uuid::Uuid;
+
+use crate::{
+    errors::api_error::ApiError,
+    middlewares::request_info::AuthenticatedRequestInfo,
+    routes::{AppState, api::openapi::tag::NGINX_TAG},
+};
+
+#[utoipa::path(
+    delete,
+    path = "/api/upstreams/{upstream_id}",
+    responses(
+        (status = 200, description = "Upstream removed successfully", body = ()),
+        (status = 401, description = "Unauthorized"),
+        (status = 404, description = "Not found"),
+        (status = 500, description = "Internal server error"),
+    ),
+    tag = NGINX_TAG,
+)]
+pub async fn remove_upstream(
+    _request_info: AuthenticatedRequestInfo,
+    Path(upstream_id): Path<Uuid>,
+    State(state): State<Arc<AppState>>,
+) -> AxumResult<Json<()>, ApiError> {
+    let upstream_service = &state.service.nginx.get_upstream_service();
+
+    let mut tx = state.database_connection.begin().await?;
+    upstream_service
+        .delete_upstream(upstream_id, Some(&mut tx))
+        .await?;
+
+    state
+        .service
+        .nginx
+        .regenerate_and_apply_config(state.service.agent_client.clone(), Some(&mut tx))
+        .await?;
+
+    tx.commit().await?;
+
+    Ok(Json(()))
+}
+
+#[cfg(test)]
+mod tests {
+    use std::sync::Arc;
+
+    use axum::http::StatusCode;
+    use axum_test::TestServer;
+    use sea_orm::{DatabaseBackend, DatabaseConnection, MockDatabase, MockExecResult};
+
+    use database::generated::entities::{upstream, upstream_target};
+
+    use crate::{
+        configs::{FromConfig, ProgramSettings},
+        middlewares::require_auth::mock::REQUEST_AUTH_USER_INVALID_HEADER,
+        routes::api::restricted::nginx::upstream::get_upstream_router,
+        services::{agent_client::MockAgentService, get_mock_app_service},
+    };
+
+    fn get_router_with_state(db: DatabaseConnection) -> axum::Router {
+        let program_settings = ProgramSettings::mock();
+        let mut mock = MockAgentService::new();
+        mock.expect_validate().returning(|_cfg| Ok(()));
+        mock.expect_apply().returning(|_cfg| Ok(()));
+        let mock_agent = Arc::new(mock);
+        let app_service =
+            get_mock_app_service(&Arc::new(db.clone()), &program_settings, mock_agent);
+        let state = Arc::new(crate::routes::AppState {
+            database_connection: Arc::new(db),
+            service: Arc::new(app_service),
+            config: Arc::new(program_settings),
+        });
+        get_upstream_router(state).layer(axum::middleware::from_fn(
+            crate::middlewares::require_auth::mock::mock_require_auth,
+        ))
+    }
+
+    #[tokio::test]
+    async fn handler_remove_upstream_succeeds_returns_ok() {
+        let up_id = uuid::Uuid::new_v4();
+
+        let existing = upstream::Model {
+            id: up_id,
+            name: "todelete".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "rr".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let target_model = upstream_target::Model {
+            id: uuid::Uuid::new_v4(),
+            upstream_id: up_id,
+            target_host: "127.0.0.1".to_string(),
+            target_port: 8080,
+            weight: 1,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![vec![existing.clone()]])
+            .append_exec_results(vec![
+                MockExecResult {
+                    rows_affected: 1,
+                    last_insert_id: 0,
+                },
+                MockExecResult {
+                    rows_affected: 1,
+                    last_insert_id: 0,
+                },
+            ])
+            // additional query result for regenerate_and_apply_config -> generate_config
+            .append_query_results(vec![vec![(existing.clone(), Some(target_model.clone()))]])
+            .into_connection();
+
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let res = server.delete(&format!("/upstreams/{}", up_id)).await;
+
+        res.assert_status_ok();
+    }
+
+    #[tokio::test]
+    async fn handler_remove_upstream_agent_error_returns_internal() {
+        let up_id = uuid::Uuid::new_v4();
+
+        let existing = upstream::Model {
+            id: up_id,
+            name: "todelete".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "rr".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let target_model = upstream_target::Model {
+            id: uuid::Uuid::new_v4(),
+            upstream_id: up_id,
+            target_host: "127.0.0.1".to_string(),
+            target_port: 8080,
+            weight: 1,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let mut mock = MockAgentService::new();
+        mock.expect_validate().returning(|_cfg| Ok(()));
+        mock.expect_apply().returning(|_cfg| {
+            Err(
+                crate::services::agent_client::AgentError::ApplicationFailed(
+                    "internal".to_string(),
+                    "Failed to communicate with the agent.".to_string(),
+                ),
+            )
+        });
+        let mock_agent = Arc::new(mock);
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![vec![existing.clone()]])
+            .append_exec_results(vec![
+                MockExecResult {
+                    rows_affected: 1,
+                    last_insert_id: 0,
+                },
+                MockExecResult {
+                    rows_affected: 1,
+                    last_insert_id: 0,
+                },
+            ])
+            .append_query_results(vec![vec![(existing.clone(), Some(target_model.clone()))]])
+            .into_connection();
+
+        let program_settings = ProgramSettings::mock();
+        let app_service =
+            get_mock_app_service(&Arc::new(db.clone()), &program_settings, mock_agent);
+        let state = Arc::new(crate::routes::AppState {
+            database_connection: Arc::new(db),
+            service: Arc::new(app_service),
+            config: Arc::new(program_settings),
+        });
+
+        let router = get_upstream_router(state).layer(axum::middleware::from_fn(
+            crate::middlewares::require_auth::mock::mock_require_auth,
+        ));
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let res = server.delete(&format!("/upstreams/{}", up_id)).await;
+        res.assert_status(axum::http::StatusCode::INTERNAL_SERVER_ERROR);
+    }
+
+    #[tokio::test]
+    async fn handler_remove_upstream_unauthenticated_returns_unauthorized() {
+        let db = MockDatabase::new(DatabaseBackend::Sqlite).into_connection();
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let res = server
+            .delete(&format!("/upstreams/{}", uuid::Uuid::new_v4()))
+            .add_header(REQUEST_AUTH_USER_INVALID_HEADER, "true")
+            .await;
+
+        res.assert_status(StatusCode::UNAUTHORIZED);
+    }
+
+    #[tokio::test]
+    async fn handler_remove_upstream_not_found_returns_not_found() {
+        let empty_results: Vec<Vec<upstream::Model>> = vec![Vec::<upstream::Model>::new()];
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(empty_results)
+            .into_connection();
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let res = server
+            .delete(&format!("/upstreams/{}", uuid::Uuid::new_v4()))
+            .await;
+
+        res.assert_status(StatusCode::NOT_FOUND);
+    }
+}

apps/api/src/routes/api/restricted/nginx/upstream/remove_upstream_target.rs

@@ -0,0 +1,230 @@
+use std::sync::Arc;
+
+use axum::{
+    Json,
+    extract::{Path, State},
+    response::Result as AxumResult,
+};
+use sea_orm::TransactionTrait;
+use uuid::Uuid;
+
+use crate::{
+    errors::api_error::ApiError,
+    middlewares::request_info::AuthenticatedRequestInfo,
+    routes::{AppState, api::openapi::tag::NGINX_TAG},
+};
+
+#[utoipa::path(
+    delete,
+    path = "/api/upstream_targets/{upstream_target_id}",
+    responses(
+        (status = 200, description = "Upstream target removed successfully", body = ()),
+        (status = 401, description = "Unauthorized"),
+        (status = 404, description = "Not found"),
+        (status = 500, description = "Internal server error"),
+    ),
+    tag = NGINX_TAG,
+)]
+pub async fn remove_upstream_target(
+    _request_info: AuthenticatedRequestInfo,
+    Path(upstream_target_id): Path<Uuid>,
+    State(state): State<Arc<AppState>>,
+) -> AxumResult<Json<()>, ApiError> {
+    let upstream_service = &state.service.nginx.get_upstream_service();
+
+    let mut tx = state.database_connection.begin().await?;
+    upstream_service
+        .delete_upstream_target(upstream_target_id, Some(&mut tx))
+        .await?;
+
+    state
+        .service
+        .nginx
+        .regenerate_and_apply_config(state.service.agent_client.clone(), Some(&mut tx))
+        .await?;
+
+    tx.commit().await?;
+
+    Ok(Json(()))
+}
+
+#[cfg(test)]
+mod tests {
+    use std::sync::Arc;
+
+    use axum::http::StatusCode;
+    use axum_test::TestServer;
+    use sea_orm::{DatabaseBackend, DatabaseConnection, MockDatabase, MockExecResult};
+
+    use database::generated::entities::{upstream, upstream_target};
+
+    use crate::{
+        configs::{FromConfig, ProgramSettings},
+        middlewares::require_auth::mock::REQUEST_AUTH_USER_INVALID_HEADER,
+        routes::api::restricted::nginx::upstream::get_upstream_router,
+        services::{agent_client::MockAgentService, get_mock_app_service},
+    };
+
+    fn get_router_with_state(db: DatabaseConnection) -> axum::Router {
+        let program_settings = ProgramSettings::mock();
+        let mut mock = MockAgentService::new();
+        mock.expect_validate().returning(|_cfg| Ok(()));
+        mock.expect_apply().returning(|_cfg| Ok(()));
+        let mock_agent = Arc::new(mock);
+        let app_service =
+            get_mock_app_service(&Arc::new(db.clone()), &program_settings, mock_agent);
+        let state = Arc::new(crate::routes::AppState {
+            database_connection: Arc::new(db),
+            service: Arc::new(app_service),
+            config: Arc::new(program_settings),
+        });
+        get_upstream_router(state).layer(axum::middleware::from_fn(
+            crate::middlewares::require_auth::mock::mock_require_auth,
+        ))
+    }
+
+    #[tokio::test]
+    async fn handler_remove_upstream_target_succeeds_returns_ok() {
+        let ut_id = uuid::Uuid::new_v4();
+
+        let current_model = upstream_target::Model {
+            id: ut_id,
+            upstream_id: uuid::Uuid::new_v4(),
+            target_host: "127.0.0.1".to_string(),
+            target_port: 8080,
+            weight: 1,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        // first find_by_id, then delete (delete typically doesn't return models)
+        let up_model = upstream::Model {
+            id: current_model.upstream_id,
+            name: "test_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "round_robin".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let first: Vec<Vec<upstream_target::Model>> = vec![vec![current_model.clone()]];
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(first)
+            .append_exec_results(vec![MockExecResult {
+                rows_affected: 1,
+                last_insert_id: 0,
+            }])
+            // additional query result for regenerate_and_apply_config -> generate_config
+            .append_query_results(vec![vec![(up_model.clone(), Some(current_model.clone()))]])
+            .into_connection();
+
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let res = server.delete(&format!("/upstream_targets/{}", ut_id)).await;
+
+        res.assert_status_ok();
+    }
+
+    #[tokio::test]
+    async fn handler_remove_upstream_target_agent_error_returns_internal() {
+        let ut_id = uuid::Uuid::new_v4();
+
+        let current_model = upstream_target::Model {
+            id: ut_id,
+            upstream_id: uuid::Uuid::new_v4(),
+            target_host: "127.0.0.1".to_string(),
+            target_port: 8080,
+            weight: 1,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let up_model = upstream::Model {
+            id: current_model.upstream_id,
+            name: "test_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "round_robin".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let mut mock = MockAgentService::new();
+        mock.expect_validate().returning(|_cfg| Ok(()));
+        mock.expect_apply().returning(|_cfg| {
+            Err(
+                crate::services::agent_client::AgentError::ApplicationFailed(
+                    "internal".to_string(),
+                    "Failed to communicate with the agent.".to_string(),
+                ),
+            )
+        });
+        let mock_agent = Arc::new(mock);
+
+        let first: Vec<Vec<upstream_target::Model>> = vec![vec![current_model.clone()]];
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(first)
+            .append_exec_results(vec![MockExecResult {
+                rows_affected: 1,
+                last_insert_id: 0,
+            }])
+            .append_query_results(vec![vec![(up_model.clone(), Some(current_model.clone()))]])
+            .into_connection();
+
+        let program_settings = ProgramSettings::mock();
+        let app_service =
+            get_mock_app_service(&Arc::new(db.clone()), &program_settings, mock_agent);
+        let state = Arc::new(crate::routes::AppState {
+            database_connection: Arc::new(db),
+            service: Arc::new(app_service),
+            config: Arc::new(program_settings),
+        });
+
+        let router = get_upstream_router(state).layer(axum::middleware::from_fn(
+            crate::middlewares::require_auth::mock::mock_require_auth,
+        ));
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let res = server.delete(&format!("/upstream_targets/{}", ut_id)).await;
+        res.assert_status(axum::http::StatusCode::INTERNAL_SERVER_ERROR);
+    }
+
+    #[tokio::test]
+    async fn handler_remove_upstream_target_unauthenticated_returns_unauthorized() {
+        let db = MockDatabase::new(DatabaseBackend::Sqlite).into_connection();
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let res = server
+            .delete(&format!("/upstream_targets/{}", uuid::Uuid::new_v4()))
+            .add_header(REQUEST_AUTH_USER_INVALID_HEADER, "true")
+            .await;
+
+        res.assert_status(StatusCode::UNAUTHORIZED);
+    }
+
+    #[tokio::test]
+    async fn handler_remove_upstream_target_not_found_returns_not_found() {
+        let empty_results: Vec<Vec<upstream_target::Model>> =
+            vec![Vec::<upstream_target::Model>::new()];
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(empty_results)
+            .into_connection();
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let res = server
+            .delete(&format!("/upstream_targets/{}", uuid::Uuid::new_v4()))
+            .await;
+
+        res.assert_status(StatusCode::NOT_FOUND);
+    }
+}

apps/api/src/routes/api/restricted/nginx/upstream/update_upstream.rs

@@ -0,0 +1,318 @@
+use std::sync::Arc;
+
+use axum::{
+    Json,
+    extract::{Path, State},
+    response::Result as AxumResult,
+};
+use sea_orm::TransactionTrait;
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+use crate::{
+    errors::api_error::ApiError,
+    middlewares::request_info::AuthenticatedRequestInfo,
+    routes::{
+        AppState, api::openapi::tag::NGINX_TAG,
+        api::restricted::nginx::upstream::info::response::UpdateUpstreamInfoResponse,
+    },
+    services::nginx::info::upstream::UpdateUpstreamInfo,
+};
+
+#[derive(Deserialize, utoipa::ToSchema, Serialize)]
+pub struct UpstreamTargetBasicUpdateInfo {
+    pub id: i64,
+    pub enabled: bool,
+}
+
+#[derive(Deserialize, utoipa::ToSchema, Serialize)]
+pub struct UpdateUpstreamRequestBody {
+    pub name: Option<String>,
+    pub protocol: Option<String>,
+    pub algorithm: Option<String>,
+    pub sticky_session: Option<bool>,
+    // only updates upstream targets' enabled status for now
+    pub upstream_targets: Option<Vec<UpstreamTargetBasicUpdateInfo>>,
+}
+
+impl From<UpdateUpstreamRequestBody> for UpdateUpstreamInfo {
+    fn from(val: UpdateUpstreamRequestBody) -> Self {
+        Self {
+            name: val.name,
+            protocol: val.protocol,
+            algorithm: val.algorithm,
+            sticky_session: val.sticky_session,
+            //
+            upstream_targets: None,
+        }
+    }
+}
+
+#[utoipa::path(
+    patch,
+    path = "/api/upstreams/{upstream_id}",
+    request_body = UpdateUpstreamRequestBody,
+    responses(
+        (status = 200, description = "Upstream updated successfully", body = UpdateUpstreamInfoResponse),
+        (status = 401, description = "Unauthorized"),
+        (status = 404, description = "Not found"),
+        (status = 422, description = "Invalid request"),
+        (status = 500, description = "Internal server error"),
+    ),
+    tag = NGINX_TAG,
+)]
+pub async fn update_upstream(
+    _request_info: AuthenticatedRequestInfo,
+    Path(upstream_id): Path<Uuid>,
+    State(state): State<Arc<AppState>>,
+    Json(payload): Json<UpdateUpstreamRequestBody>,
+) -> AxumResult<Json<UpdateUpstreamInfoResponse>, ApiError> {
+    let upstream_service = &state.service.nginx.get_upstream_service();
+    let update_info: UpdateUpstreamInfo = payload.into();
+
+    let mut tx = state.database_connection.begin().await?;
+    let r = upstream_service
+        .update_upstream(upstream_id, update_info, Some(&mut tx))
+        .await?;
+
+    state
+        .service
+        .nginx
+        .regenerate_and_apply_config(state.service.agent_client.clone(), Some(&mut tx))
+        .await?;
+
+    tx.commit().await?;
+
+    Ok(Json(r.into()))
+}
+
+#[cfg(test)]
+mod tests {
+    use std::sync::Arc;
+
+    use axum::http::StatusCode;
+    use axum_test::TestServer;
+    use sea_orm::{DatabaseBackend, DatabaseConnection, MockDatabase};
+
+    use database::generated::entities::{upstream, upstream_target};
+
+    use super::UpdateUpstreamRequestBody;
+    use crate::{
+        configs::{FromConfig, ProgramSettings},
+        middlewares::require_auth::mock::REQUEST_AUTH_USER_INVALID_HEADER,
+        routes::api::restricted::nginx::upstream::get_upstream_router,
+        services::{agent_client::MockAgentService, get_mock_app_service},
+    };
+
+    fn get_router_with_state(db: DatabaseConnection) -> axum::Router {
+        let program_settings = ProgramSettings::mock();
+        let mut mock = MockAgentService::new();
+        mock.expect_validate().returning(|_cfg| Ok(()));
+        mock.expect_apply().returning(|_cfg| Ok(()));
+        let mock_agent = Arc::new(mock);
+        let app_service =
+            get_mock_app_service(&Arc::new(db.clone()), &program_settings, mock_agent);
+        let state = Arc::new(crate::routes::AppState {
+            database_connection: Arc::new(db),
+            service: Arc::new(app_service),
+            config: Arc::new(program_settings),
+        });
+        get_upstream_router(state).layer(axum::middleware::from_fn(
+            crate::middlewares::require_auth::mock::mock_require_auth,
+        ))
+    }
+
+    #[tokio::test]
+    async fn handler_update_upstream_succeeds_returns_ok() {
+        let up_id = uuid::Uuid::new_v4();
+
+        let current_model = upstream::Model {
+            id: up_id,
+            name: "old_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "round_robin".to_string(),
+            sticky_session: false,
+            created_by: Some(uuid::Uuid::new_v4()),
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let updated_model = upstream::Model {
+            id: up_id,
+            name: "updated_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "round_robin".to_string(),
+            sticky_session: false,
+            created_by: Some(uuid::Uuid::new_v4()),
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        // first find_by_id, then update returns updated model
+        let up_model = current_model.clone();
+        let first: Vec<Vec<upstream::Model>> = vec![vec![current_model.clone()]];
+        let second: Vec<Vec<upstream::Model>> = vec![vec![updated_model.clone()]];
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(first)
+            .append_query_results(second)
+            // additional query result for regenerate_and_apply_config -> generate_config
+            .append_query_results(vec![vec![(
+                up_model.clone(),
+                Option::<upstream_target::Model>::None,
+            )]])
+            .into_connection();
+
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let payload = UpdateUpstreamRequestBody {
+            name: Some("updated_upstream".to_string()),
+            protocol: None,
+            algorithm: None,
+            sticky_session: None,
+            upstream_targets: None,
+        };
+
+        let res = server
+            .patch(&format!("/upstreams/{}", up_id))
+            .json(&payload)
+            .await;
+
+        res.assert_status_ok();
+        let text = res.text();
+        let body: crate::routes::api::restricted::nginx::upstream::info::response::UpdateUpstreamInfoResponse =
+            serde_json::from_str(&text).expect("failed to parse json");
+
+        assert_eq!(body.id, up_id);
+        assert_eq!(body.name, "updated_upstream");
+    }
+
+    #[tokio::test]
+    async fn handler_update_upstream_agent_error_returns_internal() {
+        let up_id = uuid::Uuid::new_v4();
+
+        let current_model = upstream::Model {
+            id: up_id,
+            name: "old_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "round_robin".to_string(),
+            sticky_session: false,
+            created_by: Some(uuid::Uuid::new_v4()),
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let updated_model = upstream::Model {
+            id: up_id,
+            name: "updated_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "round_robin".to_string(),
+            sticky_session: false,
+            created_by: Some(uuid::Uuid::new_v4()),
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let up_model = current_model.clone();
+
+        let mut mock = MockAgentService::new();
+        mock.expect_validate().returning(|_cfg| Ok(()));
+        mock.expect_apply().returning(|_cfg| {
+            Err(
+                crate::services::agent_client::AgentError::ApplicationFailed(
+                    "internal".to_string(),
+                    "Failed to communicate with the agent.".to_string(),
+                ),
+            )
+        });
+        let mock_agent = Arc::new(mock);
+
+        let first: Vec<Vec<upstream::Model>> = vec![vec![current_model.clone()]];
+        let second: Vec<Vec<upstream::Model>> = vec![vec![updated_model.clone()]];
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(first)
+            .append_query_results(second)
+            .append_query_results(vec![vec![(
+                up_model.clone(),
+                Option::<upstream_target::Model>::None,
+            )]])
+            .into_connection();
+
+        let program_settings = ProgramSettings::mock();
+        let app_service =
+            get_mock_app_service(&Arc::new(db.clone()), &program_settings, mock_agent);
+        let state = Arc::new(crate::routes::AppState {
+            database_connection: Arc::new(db),
+            service: Arc::new(app_service),
+            config: Arc::new(program_settings),
+        });
+
+        let router = get_upstream_router(state).layer(axum::middleware::from_fn(
+            crate::middlewares::require_auth::mock::mock_require_auth,
+        ));
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let payload = UpdateUpstreamRequestBody {
+            name: Some("updated_upstream".to_string()),
+            protocol: None,
+            algorithm: None,
+            sticky_session: None,
+            upstream_targets: None,
+        };
+
+        let res = server
+            .patch(&format!("/upstreams/{}", up_id))
+            .json(&payload)
+            .await;
+
+        res.assert_status(axum::http::StatusCode::INTERNAL_SERVER_ERROR);
+    }
+
+    #[tokio::test]
+    async fn handler_update_upstream_unauthenticated_returns_unauthorized() {
+        let db = MockDatabase::new(DatabaseBackend::Sqlite).into_connection();
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let payload = UpdateUpstreamRequestBody {
+            name: Some("updated_upstream".to_string()),
+            protocol: None,
+            algorithm: None,
+            sticky_session: None,
+            upstream_targets: None,
+        };
+
+        let res = server
+            .patch(&format!("/upstreams/{}", uuid::Uuid::new_v4()))
+            .add_header(REQUEST_AUTH_USER_INVALID_HEADER, "true")
+            .json(&payload)
+            .await;
+
+        res.assert_status(StatusCode::UNAUTHORIZED);
+    }
+
+    #[tokio::test]
+    async fn handler_update_upstream_not_found_returns_not_found() {
+        let empty_results: Vec<Vec<upstream::Model>> = vec![Vec::<upstream::Model>::new()];
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(empty_results)
+            .into_connection();
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let payload = UpdateUpstreamRequestBody {
+            name: Some("updated_upstream".to_string()),
+            protocol: None,
+            algorithm: None,
+            sticky_session: None,
+            upstream_targets: None,
+        };
+
+        let res = server
+            .patch(&format!("/upstreams/{}", uuid::Uuid::new_v4()))
+            .json(&payload)
+            .await;
+
+        res.assert_status(StatusCode::NOT_FOUND);
+    }
+}

apps/api/src/routes/api/restricted/nginx/upstream/update_upstream_target.rs

@@ -0,0 +1,348 @@
+use std::sync::Arc;
+
+use axum::{
+    Json,
+    extract::{Path, State},
+    response::Result as AxumResult,
+};
+use sea_orm::TransactionTrait;
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+use crate::{
+    errors::api_error::ApiError,
+    middlewares::request_info::AuthenticatedRequestInfo,
+    routes::{
+        AppState, api::openapi::tag::NGINX_TAG,
+        api::restricted::nginx::upstream::info::response::UpdateUpstreamTargetInfoResponse,
+    },
+    services::nginx::info::upstream_target::UpdateUpstreamTargetInfo,
+};
+
+#[derive(Deserialize, utoipa::ToSchema, Serialize)]
+pub struct UpdateUpstreamTargetRequestBody {
+    pub host: Option<String>,
+    pub port: Option<i64>,
+    pub enabled: Option<bool>,
+    pub is_backup: Option<bool>,
+    pub weight: Option<i32>,
+}
+
+impl From<UpdateUpstreamTargetRequestBody> for UpdateUpstreamTargetInfo {
+    fn from(val: UpdateUpstreamTargetRequestBody) -> Self {
+        Self {
+            target_host: val.host,
+            target_port: val.port,
+            enabled: val.enabled,
+            is_backup: val.is_backup,
+            weight: val.weight.map(|w| w as i64),
+        }
+    }
+}
+
+#[utoipa::path(
+    patch,
+    path = "/api/upstream_targets/{upstream_target_id}",
+    request_body = UpdateUpstreamTargetRequestBody,
+    responses(
+        (status = 200, description = "Upstream target updated successfully", body = UpdateUpstreamTargetInfoResponse),
+        (status = 401, description = "Unauthorized"),
+        (status = 404, description = "Not found"),
+        (status = 422, description = "Invalid request"),
+        (status = 500, description = "Internal server error"),
+    ),
+    tag = NGINX_TAG,
+)]
+pub async fn update_upstream_target(
+    _request_info: AuthenticatedRequestInfo,
+    Path(upstream_target_id): Path<Uuid>,
+    State(state): State<Arc<AppState>>,
+    Json(payload): Json<UpdateUpstreamTargetRequestBody>,
+) -> AxumResult<Json<UpdateUpstreamTargetInfoResponse>, ApiError> {
+    let upstream_service = &state.service.nginx.get_upstream_service();
+    let update_info: UpdateUpstreamTargetInfo = payload.into();
+
+    let mut tx = state.database_connection.begin().await?;
+    let r = upstream_service
+        .update_upstream_target(upstream_target_id, update_info, Some(&mut tx))
+        .await?;
+
+    state
+        .service
+        .nginx
+        .regenerate_and_apply_config(state.service.agent_client.clone(), Some(&mut tx))
+        .await?;
+
+    tx.commit().await?;
+
+    Ok(Json(r.into()))
+}
+
+#[cfg(test)]
+mod tests {
+    use std::sync::Arc;
+
+    use axum::http::StatusCode;
+    use axum::routing::patch;
+    use axum_test::TestServer;
+    use sea_orm::{DatabaseBackend, DatabaseConnection, MockDatabase};
+
+    use database::generated::entities::{upstream, upstream_target};
+
+    use super::UpdateUpstreamTargetRequestBody;
+    use crate::{
+        configs::{FromConfig, ProgramSettings},
+        middlewares::require_auth::mock::REQUEST_AUTH_USER_INVALID_HEADER,
+        services::{agent_client::MockAgentService, get_mock_app_service},
+    };
+
+    fn get_router_with_state(db: DatabaseConnection) -> axum::Router {
+        let program_settings = ProgramSettings::mock();
+        let mut mock = MockAgentService::new();
+        mock.expect_validate().returning(|_cfg| Ok(()));
+        mock.expect_apply().returning(|_cfg| Ok(()));
+        let mock_agent = Arc::new(mock);
+        let app_service =
+            get_mock_app_service(&Arc::new(db.clone()), &program_settings, mock_agent);
+        let state = Arc::new(crate::routes::AppState {
+            database_connection: Arc::new(db),
+            service: Arc::new(app_service),
+            config: Arc::new(program_settings),
+        });
+
+        axum::Router::new()
+            .route(
+                "/upstream_targets/{upstream_target_id}",
+                patch(crate::routes::api::restricted::nginx::upstream::update_upstream_target::update_upstream_target),
+            )
+            .with_state(state)
+            .layer(axum::middleware::from_fn(
+                crate::middlewares::require_auth::mock::mock_require_auth,
+            ))
+    }
+
+    #[tokio::test]
+    async fn handler_update_upstream_target_succeeds_returns_ok() {
+        let target_id = uuid::Uuid::new_v4();
+
+        let current_model = upstream_target::Model {
+            id: target_id,
+            upstream_id: uuid::Uuid::new_v4(),
+            target_host: "127.0.0.1".to_string(),
+            target_port: 8080,
+            weight: 1,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let updated_model = upstream_target::Model {
+            id: target_id,
+            upstream_id: current_model.upstream_id,
+            target_host: "127.0.0.1".to_string(),
+            target_port: 8081,
+            weight: 2,
+            is_backup: false,
+            enabled: false,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let up_model = upstream::Model {
+            id: current_model.upstream_id,
+            name: "test_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "round_robin".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let first: Vec<Vec<upstream_target::Model>> = vec![vec![current_model.clone()]];
+        let second: Vec<Vec<upstream_target::Model>> = vec![vec![updated_model.clone()]];
+        // additional query result for regenerate_and_apply_config -> generate_config
+        let third: Vec<Vec<(upstream::Model, Option<upstream_target::Model>)>> =
+            vec![vec![(up_model.clone(), Some(updated_model.clone()))]];
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(first)
+            .append_query_results(second)
+            .append_query_results(third)
+            .into_connection();
+
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let payload = UpdateUpstreamTargetRequestBody {
+            host: None,
+            port: Some(8081),
+            enabled: Some(false),
+            is_backup: None,
+            weight: Some(2),
+        };
+
+        let res = server
+            .patch(&format!("/upstream_targets/{}", target_id))
+            .json(&payload)
+            .await;
+
+        res.assert_status_ok();
+        let text = res.text();
+        let body: crate::routes::api::restricted::nginx::upstream::info::response::UpdateUpstreamTargetInfoResponse =
+            serde_json::from_str(&text).expect("failed to parse json");
+
+        assert_eq!(body.id, target_id);
+        assert_eq!(body.port, 8081);
+        assert!(!body.enabled);
+    }
+
+    #[tokio::test]
+    async fn handler_update_upstream_target_unauthenticated_returns_unauthorized() {
+        let db = MockDatabase::new(DatabaseBackend::Sqlite).into_connection();
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let payload = UpdateUpstreamTargetRequestBody {
+            host: None,
+            port: Some(8081),
+            enabled: Some(false),
+            is_backup: None,
+            weight: Some(2),
+        };
+
+        let res = server
+            .patch(&format!("/upstream_targets/{}", uuid::Uuid::new_v4()))
+            .add_header(REQUEST_AUTH_USER_INVALID_HEADER, "true")
+            .json(&payload)
+            .await;
+
+        res.assert_status(StatusCode::UNAUTHORIZED);
+    }
+
+    #[tokio::test]
+    async fn handler_update_upstream_target_not_found_returns_not_found() {
+        let empty_results: Vec<Vec<upstream_target::Model>> =
+            vec![Vec::<upstream_target::Model>::new()];
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(empty_results)
+            .into_connection();
+        let router = get_router_with_state(db.clone());
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let payload = UpdateUpstreamTargetRequestBody {
+            host: None,
+            port: Some(8081),
+            enabled: Some(false),
+            is_backup: None,
+            weight: Some(2),
+        };
+
+        let res = server
+            .patch(&format!("/upstream_targets/{}", uuid::Uuid::new_v4()))
+            .json(&payload)
+            .await;
+
+        res.assert_status(StatusCode::NOT_FOUND);
+    }
+
+    #[tokio::test]
+    async fn handler_update_upstream_target_agent_error_returns_internal() {
+        let target_id = uuid::Uuid::new_v4();
+
+        let current_model = upstream_target::Model {
+            id: target_id,
+            upstream_id: uuid::Uuid::new_v4(),
+            target_host: "127.0.0.1".to_string(),
+            target_port: 8080,
+            weight: 1,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let updated_model = upstream_target::Model {
+            id: target_id,
+            upstream_id: current_model.upstream_id,
+            target_host: "127.0.0.1".to_string(),
+            target_port: 8081,
+            weight: 2,
+            is_backup: false,
+            enabled: false,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let up_model = upstream::Model {
+            id: current_model.upstream_id,
+            name: "test_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "round_robin".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let mut mock = MockAgentService::new();
+        mock.expect_validate().returning(|_cfg| Ok(()));
+        mock.expect_apply().returning(|_cfg| {
+            Err(
+                crate::services::agent_client::AgentError::ApplicationFailed(
+                    "internal".to_string(),
+                    "Failed to communicate with the agent.".to_string(),
+                ),
+            )
+        });
+        let mock_agent = Arc::new(mock);
+
+        let first: Vec<Vec<upstream_target::Model>> = vec![vec![current_model.clone()]];
+        let second: Vec<Vec<upstream_target::Model>> = vec![vec![updated_model.clone()]];
+        let third: Vec<Vec<(upstream::Model, Option<upstream_target::Model>)>> =
+            vec![vec![(up_model.clone(), Some(updated_model.clone()))]];
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(first)
+            .append_query_results(second)
+            .append_query_results(third)
+            .into_connection();
+
+        let program_settings = ProgramSettings::mock();
+        let app_service =
+            get_mock_app_service(&Arc::new(db.clone()), &program_settings, mock_agent);
+        let state = Arc::new(crate::routes::AppState {
+            database_connection: Arc::new(db),
+            service: Arc::new(app_service),
+            config: Arc::new(program_settings),
+        });
+
+        let router = axum::Router::new()
+            .route(
+                "/upstream_targets/{upstream_target_id}",
+                axum::routing::patch(crate::routes::api::restricted::nginx::upstream::update_upstream_target::update_upstream_target),
+            )
+            .with_state(state)
+            .layer(axum::middleware::from_fn(
+                crate::middlewares::require_auth::mock::mock_require_auth,
+            ));
+
+        let server = TestServer::new(router).expect("failed to create test server");
+
+        let payload = UpdateUpstreamTargetRequestBody {
+            host: None,
+            port: Some(8081),
+            enabled: Some(false),
+            is_backup: None,
+            weight: Some(2),
+        };
+
+        let res = server
+            .patch(&format!("/upstream_targets/{}", target_id))
+            .json(&payload)
+            .await;
+
+        res.assert_status(axum::http::StatusCode::INTERNAL_SERVER_ERROR);
+    }
+}

apps/api/src/services.rs

@@ -1,5 +1,6 @@
 pub mod agent_client;
 pub mod auth;
+pub mod nginx;
 pub mod server_state;
 pub mod settings;
 
@@ -7,14 +8,18 @@ use std::sync::Arc;
 
 use ::agent_client::apis::configuration::Configuration;
 
+#[cfg(test)]
+use crate::services::agent_client::MockAgentService;
 use crate::{
     configs::ProgramSettings,
     routes::{self, AuthState},
     services::{
+        agent_client::{AgentService, AgentServiceImpl},
         auth::{
             authentication::{AuthenticationServiceImpl, strategies::password::PasswordStrategy},
             user::{UserService, UserServiceImpl},
         },
+        nginx::NginxService,
         server_state::{ServerStateService, ServerStateStore},
         settings::{SettingsService, SettingsStore},
     },
@@ -28,7 +33,9 @@ pub struct AppService {
     pub user: ServiceState<dyn UserService>,
     pub server_state: ServiceState<dyn ServerStateStore>,
     #[allow(dead_code)]
-    pub agent_client: ServiceState<agent_client::AgentService>,
+    pub nginx: ServiceState<NginxService>,
+    #[allow(dead_code)]
+    pub agent_client: ServiceState<dyn AgentService>,
 }
 
 pub fn get_app_service(
@@ -47,8 +54,32 @@ pub fn get_app_service(
             )),
         },
         user: Arc::new(UserServiceImpl::new(db_connection.clone())),
-        agent_client: Arc::new(agent_client::AgentService::new(Configuration::from(
+        nginx: Arc::new(NginxService::new(db_connection.clone())),
+        agent_client: Arc::new(AgentServiceImpl::new(Configuration::from(
             settings.agent.clone(),
         ))),
     }
 }
+
+#[cfg(test)]
+pub fn get_mock_app_service(
+    db_connection: &Arc<sea_orm::DatabaseConnection>,
+    settings: &ProgramSettings,
+    mock_agent: Arc<MockAgentService>,
+) -> AppService {
+    AppService {
+        server_state: Arc::new(ServerStateService::new(db_connection.clone())),
+        settings: Arc::new(SettingsService::new(db_connection.clone())),
+        auth_state: routes::AuthState {
+            strategy: routes::AuthStrategy {
+                password: Arc::new(PasswordStrategy::new(db_connection.clone())),
+            },
+            authentication: Arc::new(AuthenticationServiceImpl::new(
+                settings.auth.jwt_secret.clone(),
+            )),
+        },
+        user: Arc::new(UserServiceImpl::new(db_connection.clone())),
+        nginx: Arc::new(NginxService::new(db_connection.clone())),
+        agent_client: mock_agent,
+    }
+}

apps/api/src/services/agent_client.rs

@@ -1,21 +1,113 @@
-use std::sync::Arc;
+use std::{os::unix::fs::FileTypeExt, sync::Arc};
 
-use agent_client::apis::{ApiClient, configuration::Configuration};
+use agent_client::{
+    apis::{
+        Api, ApiClient, Error as ApiError, ResponseContent,
+        configuration::Configuration,
+        nginx_agent_api::{ValidateAndReloadParams, ValidateParams, WriteConfigParams},
+    },
+    models::{ValidateAndReloadBody, ValidateBody, WriteConfigBody},
+};
 use tracing::warn;
 
-use crate::configs::agent::AgentSettings;
+use crate::{configs::agent::AgentSettings, errors::service_error::ServiceError};
 
-pub struct AgentService {
+#[derive(Debug)]
+pub enum AgentError {
+    // (internal messages, user-facing messages)
+    #[allow(dead_code)]
+    ValidationFailed(String, String),
+    // (internal messages, user-facing messages)
+    ApplicationFailed(String, String),
+}
+
+impl From<AgentError> for ServiceError {
+    fn from(err: AgentError) -> Self {
+        match err {
+            AgentError::ValidationFailed(_internal, user) => ServiceError::InternalError(user),
+            AgentError::ApplicationFailed(_internal, user) => ServiceError::InternalError(user),
+        }
+    }
+}
+
+impl<T: std::fmt::Debug> From<ResponseContent<T>> for AgentError {
+    fn from(err: ResponseContent<T>) -> Self {
+        let ResponseContent {
+            status,
+            content,
+            entity,
+        } = err;
+        {
+            let entity_str = entity
+                .map(|e| format!("{:?}", e))
+                .unwrap_or_else(|| "<empty>".to_string());
+            AgentError::ApplicationFailed(
+                format!(
+                    "Agent responded with error status {}: {}, entity: {}",
+                    status, content, entity_str
+                ),
+                "Agent reported an error during operation.".to_string(),
+            )
+        }
+    }
+}
+
+impl<T: std::fmt::Debug> From<ApiError<T>> for AgentError {
+    fn from(err: ApiError<T>) -> Self {
+        match err {
+            ApiError::ResponseError(resp) => AgentError::from(resp),
+            ApiError::Io(err) => AgentError::ApplicationFailed(
+                format!("IO error during agent communication: {}", err),
+                "Failed to communicate with the agent.".to_string(),
+            ),
+            ApiError::Reqwest(err) => AgentError::ApplicationFailed(
+                format!("Reqwest error during agent communication: {}", err),
+                "Failed to communicate with the agent.".to_string(),
+            ),
+            ApiError::Serde(err) => AgentError::ApplicationFailed(
+                format!("Serialization error during agent communication: {}", err),
+                "Failed to communicate with the agent.".to_string(),
+            ),
+        }
+    }
+}
+
+#[cfg_attr(test, mockall::automock)]
+#[async_trait::async_trait]
+pub trait AgentService: Send + Sync {
+    #[allow(dead_code)]
+    fn get_client(&self) -> Arc<ApiClient>;
+
+    // TODO: improve error handling and reporting, error reasons
+    // validate configurations that has been created/updated before the given timestamp
+    #[allow(dead_code)]
+    async fn validate(&self, config: &str) -> Result<(), AgentError>;
+    // validate and apply configurations that has been created/updated before the given timestamp
+    async fn apply(&self, config: &str) -> Result<(), AgentError>;
+}
+
+pub struct AgentServiceImpl {
     client: Arc<ApiClient>,
 }
 
+impl AgentServiceImpl {
+    pub fn new(config: impl Into<Arc<Configuration>>) -> Self {
+        let client = ApiClient::new(config.into());
+        AgentServiceImpl {
+            client: Arc::new(client),
+        }
+    }
+}
+
 impl From<AgentSettings> for Configuration {
     fn from(settings: AgentSettings) -> Self {
         let mut config = Configuration::default();
         let mut builder = reqwest::Client::builder();
 
         let url = settings.socket_path;
-        if url.starts_with("unix://") {
+        // check if the url is a unix socket path
+        let is_socket = std::fs::metadata(&url).is_ok_and(|m| m.file_type().is_socket());
+        if is_socket || url.starts_with("unix://") {
             builder = builder.unix_socket(url.to_string());
             config.client = builder.build().expect("Failed to build reqwest client");
         } else {
@@ -27,17 +119,73 @@ impl From<AgentSettings> for Configuration {
     }
 }
 
-impl AgentService {
+#[async_trait::async_trait]
-    pub fn new(config: impl Into<Arc<Configuration>>) -> Self {
+impl AgentService for AgentServiceImpl {
-        let client = ApiClient::new(config.into());
+    fn get_client(&self) -> Arc<ApiClient> {
-        AgentService {
+        Arc::clone(&self.client)
-            client: Arc::new(client),
-        }
     }
 
-    #[allow(dead_code)]
+    async fn validate(&self, config: &str) -> Result<(), AgentError> {
-    pub fn get_client(&self) -> Arc<ApiClient> {
+        let timestamp = chrono::Utc::now().timestamp_millis();
-        Arc::clone(&self.client)
+        let name = Self::get_config_name(true);
+        self._validate(&name, timestamp, config).await
+    }
+
+    async fn apply(&self, config: &str) -> Result<(), AgentError> {
+        let timestamp = chrono::Utc::now().timestamp_millis();
+        let name = Self::get_config_name(false);
+        self._validate(&name, timestamp, config).await?;
+        self._apply(&name, timestamp).await
+    }
+}
+
+impl AgentServiceImpl {
+    fn get_config_name(is_validate_only: bool) -> String {
+        format!(
+            "nginx_config_{}{}",
+            if is_validate_only {
+                "validation_"
+            } else {
+                "application_"
+            },
+            uuid::Uuid::new_v4()
+        )
+    }
+
+    async fn _validate(&self, name: &str, timestamp: i64, config: &str) -> Result<(), AgentError> {
+        let api = self.client.nginx_agent_api();
+
+        api.write_config(WriteConfigParams {
+            write_config_body: WriteConfigBody {
+                config_name: name.to_string(),
+                content: config.to_string(),
+                timestamp,
+            },
+        })
+        .await?;
+
+        api.validate(ValidateParams {
+            validate_body: ValidateBody {
+                config_name: name.to_string(),
+                timestamp,
+            },
+        })
+        .await?;
+
+        Ok(())
+    }
+
+    async fn _apply(&self, name: &str, timestamp: i64) -> Result<(), AgentError> {
+        let api = self.client.nginx_agent_api();
+        api.validate_and_reload(ValidateAndReloadParams {
+            validate_and_reload_body: ValidateAndReloadBody {
+                config_name: name.to_string(),
+                timestamp,
+            },
+        })
+        .await?;
+
+        Ok(())
     }
 }
 
@@ -56,7 +204,7 @@ mod tests {
     #[test]
     fn test_agent_service_creation() {
         let config = Configuration::default();
-        let service = AgentService::new(config);
+        let service = AgentServiceImpl::new(config);
         let client = service.get_client();
         assert!(Arc::ptr_eq(&client, &service.client));
     }

apps/api/src/services/nginx.rs

@@ -0,0 +1,86 @@
+pub mod builder;
+pub mod info;
+pub mod traits;
+
+pub mod upstream;
+
+use std::sync::Arc;
+
+use sea_orm::{DatabaseConnection, DatabaseTransaction};
+
+use crate::{
+    errors::service_error::ServiceError,
+    services::{
+        agent_client::AgentService,
+        nginx::{
+            builder::{NginxConfigBuilder, NginxConfigProvider},
+            upstream::{UpstreamService, UpstreamServiceImpl},
+        },
+    },
+};
+
+pub struct NginxService {
+    #[allow(dead_code)]
+    connection: Arc<DatabaseConnection>,
+    //
+    upstream_service: Arc<dyn UpstreamService>,
+}
+
+impl NginxService {
+    pub fn new(connection: Arc<DatabaseConnection>) -> Self {
+        Self {
+            connection: connection.clone(),
+            //
+            upstream_service: Arc::new(UpstreamServiceImpl::new(connection.clone())),
+        }
+    }
+
+    pub fn get_upstream_service(&self) -> Arc<dyn UpstreamService> {
+        self.upstream_service.clone()
+    }
+
+    #[allow(dead_code)]
+    pub async fn validate_config(
+        &self,
+        agent: Arc<dyn AgentService>,
+        config: &str,
+    ) -> Result<(), ServiceError> {
+        agent.validate(config).await?;
+
+        Ok(())
+    }
+
+    pub async fn apply_changes(
+        &self,
+        agent: Arc<dyn AgentService>,
+        config: &str,
+    ) -> Result<(), ServiceError> {
+        agent.apply(config).await?;
+
+        Ok(())
+    }
+
+    pub async fn generate_config(
+        &self,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<String, ServiceError> {
+        let mut builder = NginxConfigBuilder::default();
+        self.upstream_service
+            .generate_config(&mut builder, tx)
+            .await?;
+
+        Ok(builder.to_nginx_config(None))
+    }
+
+    pub async fn regenerate_and_apply_config(
+        &self,
+        agent: Arc<dyn AgentService>,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<(), ServiceError> {
+        let config = self.generate_config(tx).await?;
+
+        self.apply_changes(agent, &config).await?;
+
+        Ok(())
+    }
+}

apps/api/src/services/nginx/builder.rs

@@ -0,0 +1,42 @@
+use crate::services::nginx::info::upstream::UpstreamInfo;
+
+pub const INDENT_SIZE: usize = 2;
+
+pub trait NginxConfigProvider {
+    fn to_nginx_config(&self, indent: Option<usize>) -> String;
+}
+
+#[derive(Default)]
+pub struct NginxConfigBuilder {
+    upstreams: Vec<UpstreamInfo>,
+}
+
+impl NginxConfigBuilder {
+    pub fn add_upstream(&mut self, upstream: UpstreamInfo) {
+        self.upstreams.push(upstream);
+    }
+
+    pub fn add_upstreams(&mut self, upstreams: Vec<UpstreamInfo>) {
+        for upstream in upstreams {
+            self.add_upstream(upstream);
+        }
+    }
+}
+
+impl NginxConfigProvider for NginxConfigBuilder {
+    fn to_nginx_config(&self, indent: Option<usize>) -> String {
+        let mut config = format!(
+            "# Nginx Config Generated by YANPM at {}",
+            chrono::Utc::now()
+        );
+
+        for upstream in &self.upstreams {
+            config.push('\n');
+            config.push_str(&upstream.to_nginx_config(indent));
+        }
+
+        // TODO: Add other sections like servers, locations, etc.
+
+        config
+    }
+}

apps/api/src/services/nginx/info.rs

@@ -0,0 +1,2 @@
+pub mod upstream;
+pub mod upstream_target;

apps/api/src/services/nginx/info/upstream.rs

@@ -0,0 +1,164 @@
+use chrono::{DateTime, Utc};
+
+use database::generated::entities::{upstream, upstream_target};
+use sea_orm::ActiveValue::{Set, Unchanged};
+use uuid::Uuid;
+
+use crate::{
+    services::nginx::{
+        builder::{INDENT_SIZE, NginxConfigProvider},
+        info::upstream_target as upstream_target_info,
+        traits::indentable::Indentable,
+    },
+    set_if_some,
+};
+
+#[derive(Clone)]
+pub struct UpstreamInfo {
+    pub id: Uuid,
+    pub name: String,
+    pub protocol: String,
+    pub algorithm: String,
+    pub sticky_session: bool,
+    pub created_by: Option<Uuid>,
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+    //
+    pub upstream_targets: Vec<upstream_target_info::UpstreamTargetInfo>,
+}
+
+pub struct UpstreamCreateInfo {
+    pub name: String,
+    pub protocol: String,
+    pub algorithm: String,
+    pub sticky_session: bool,
+    pub created_by: Option<Uuid>,
+    //
+    pub upstream_targets: Vec<upstream_target_info::UpstreamTargetCreateInfo>,
+}
+
+#[derive(Clone)]
+pub struct UpdateUpstreamInfo {
+    pub name: Option<String>,
+    pub protocol: Option<String>,
+    pub algorithm: Option<String>,
+    pub sticky_session: Option<bool>,
+    //
+    pub upstream_targets: Option<Vec<(Uuid, bool)>>,
+}
+
+impl NginxConfigProvider for UpstreamInfo {
+    fn to_nginx_config(&self, indent: Option<usize>) -> String {
+        let targets_config: Vec<String> = self
+            .upstream_targets
+            .iter()
+            .map(|target| target.to_nginx_config(Some(indent.unwrap_or(0) + INDENT_SIZE)))
+            .collect();
+
+        format!(
+            "upstream {} {{\n{}\n}}",
+            self.name,
+            targets_config.join("\n".indent(indent.unwrap_or(0) + INDENT_SIZE).as_str())
+        )
+        .indent(indent.unwrap_or(0))
+    }
+}
+
+impl From<UpstreamCreateInfo> for (upstream::ActiveModel, Vec<upstream_target::ActiveModel>) {
+    fn from(val: UpstreamCreateInfo) -> (upstream::ActiveModel, Vec<upstream_target::ActiveModel>) {
+        let upstream_uuid = Uuid::new_v4();
+        let upstream = upstream::ActiveModel {
+            id: sea_orm::ActiveValue::Set(upstream_uuid),
+            name: sea_orm::ActiveValue::Set(val.name),
+            protocol: sea_orm::ActiveValue::Set(val.protocol),
+            algorithm: sea_orm::ActiveValue::Set(val.algorithm),
+            sticky_session: sea_orm::ActiveValue::Set(val.sticky_session),
+            created_by: sea_orm::ActiveValue::Set(val.created_by),
+            created_at: sea_orm::ActiveValue::Set(chrono::Utc::now()),
+            updated_at: sea_orm::ActiveValue::Set(chrono::Utc::now()),
+        };
+        let upstream_targets = val
+            .upstream_targets
+            .into_iter()
+            .map(|target| {
+                let mut active_model: upstream_target::ActiveModel = target.into();
+                active_model.upstream_id = sea_orm::ActiveValue::Set(upstream_uuid);
+                active_model
+            })
+            .collect();
+        (upstream, upstream_targets)
+    }
+}
+
+impl From<upstream::Model> for UpstreamInfo {
+    fn from(model: upstream::Model) -> Self {
+        Self {
+            id: model.id,
+            name: model.name,
+            protocol: model.protocol,
+            algorithm: model.algorithm,
+            sticky_session: model.sticky_session,
+            created_by: model.created_by,
+            created_at: model.created_at,
+            updated_at: model.updated_at,
+            upstream_targets: Vec::new(),
+        }
+    }
+}
+
+impl From<(upstream::Model, Vec<upstream_target::Model>)> for UpstreamInfo {
+    fn from(data: (upstream::Model, Vec<upstream_target::Model>)) -> Self {
+        let (upstream_model, upstream_target_models) = data;
+
+        Self {
+            id: upstream_model.id,
+            name: upstream_model.name,
+            protocol: upstream_model.protocol,
+            algorithm: upstream_model.algorithm,
+            sticky_session: upstream_model.sticky_session,
+            created_by: upstream_model.created_by,
+            created_at: upstream_model.created_at,
+            updated_at: upstream_model.updated_at,
+            upstream_targets: upstream_target_models
+                .into_iter()
+                .map(upstream_target_info::UpstreamTargetInfo::from)
+                .collect(),
+        }
+    }
+}
+
+impl From<UpstreamInfo> for (upstream::ActiveModel, Vec<upstream_target::ActiveModel>) {
+    fn from(val: UpstreamInfo) -> Self {
+        (
+            upstream::ActiveModel {
+                id: sea_orm::ActiveValue::Set(val.id),
+                name: sea_orm::ActiveValue::Set(val.name),
+                protocol: sea_orm::ActiveValue::Set(val.protocol),
+                algorithm: sea_orm::ActiveValue::Set(val.algorithm),
+                sticky_session: sea_orm::ActiveValue::Set(val.sticky_session),
+                created_by: sea_orm::ActiveValue::Set(val.created_by),
+                created_at: sea_orm::ActiveValue::Set(val.created_at),
+                updated_at: sea_orm::ActiveValue::Set(val.updated_at),
+            },
+            val.upstream_targets
+                .into_iter()
+                .map(|target| target.into())
+                .collect(),
+        )
+    }
+}
+
+impl UpdateUpstreamInfo {
+    pub fn apply_to_model(self, current_model: upstream::Model) -> upstream::ActiveModel {
+        upstream::ActiveModel {
+            id: Unchanged(current_model.id),
+            name: set_if_some!(self.name),
+            protocol: set_if_some!(self.protocol),
+            algorithm: set_if_some!(self.algorithm),
+            sticky_session: set_if_some!(self.sticky_session),
+            created_by: Unchanged(current_model.created_by),
+            created_at: Unchanged(current_model.created_at),
+            updated_at: Set(chrono::Utc::now()),
+        }
+    }
+}

apps/api/src/services/nginx/info/upstream_target.rs

@@ -0,0 +1,161 @@
+use chrono::{DateTime, Utc};
+
+use sea_orm::ActiveValue::{Set, Unchanged};
+use uuid::Uuid;
+
+use database::generated::entities::{upstream, upstream_target};
+
+use crate::{
+    services::nginx::{builder::NginxConfigProvider, traits::indentable::Indentable},
+    set_if_some,
+};
+
+#[derive(Clone)]
+pub struct UpstreamTargetInfo {
+    pub id: uuid::Uuid,
+    pub target_host: String,
+    pub target_port: i64,
+    pub weight: i64,
+    pub is_backup: bool,
+    pub enabled: bool,
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+    //
+    pub upstream_id: uuid::Uuid,
+    pub upstream: Option<UpstreamBasicInfo>,
+}
+
+#[derive(Clone)]
+pub struct UpdateUpstreamTargetInfo {
+    pub target_host: Option<String>,
+    pub target_port: Option<i64>,
+    pub weight: Option<i64>,
+    pub is_backup: Option<bool>,
+    pub enabled: Option<bool>,
+}
+
+#[derive(Clone)]
+pub struct UpstreamBasicInfo {
+    pub id: uuid::Uuid,
+    pub name: String,
+    pub protocol: String,
+    //
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+}
+
+pub struct UpstreamTargetCreateInfo {
+    pub target_host: String,
+    pub target_port: i64,
+    pub weight: i64,
+    pub is_backup: bool,
+    pub enabled: bool,
+    //
+    pub upstream_id: uuid::Uuid,
+}
+
+impl From<upstream_target::Model> for UpstreamTargetInfo {
+    fn from(model: upstream_target::Model) -> Self {
+        Self {
+            id: model.id,
+            target_host: model.target_host,
+            target_port: model.target_port,
+            weight: model.weight,
+            is_backup: model.is_backup,
+            enabled: model.enabled,
+            created_at: model.created_at,
+            updated_at: model.updated_at,
+            upstream_id: model.upstream_id,
+            upstream: None,
+        }
+    }
+}
+
+impl From<(upstream_target::Model, upstream::Model)> for UpstreamTargetInfo {
+    fn from(data: (upstream_target::Model, upstream::Model)) -> Self {
+        let (target_model, up_model) = data;
+        Self {
+            id: target_model.id,
+            target_host: target_model.target_host,
+            target_port: target_model.target_port,
+            weight: target_model.weight,
+            is_backup: target_model.is_backup,
+            enabled: target_model.enabled,
+            created_at: target_model.created_at,
+            updated_at: target_model.updated_at,
+            upstream_id: target_model.upstream_id,
+            upstream: Some(UpstreamBasicInfo {
+                id: up_model.id,
+                name: up_model.name,
+                protocol: up_model.protocol,
+                created_at: up_model.created_at,
+                updated_at: up_model.updated_at,
+            }),
+        }
+    }
+}
+
+impl From<UpstreamTargetInfo> for upstream_target::ActiveModel {
+    fn from(val: UpstreamTargetInfo) -> Self {
+        upstream_target::ActiveModel {
+            id: Set(val.id),
+            target_host: Set(val.target_host),
+            target_port: Set(val.target_port),
+            weight: Set(val.weight),
+            is_backup: Set(val.is_backup),
+            enabled: Set(val.enabled),
+            created_at: Set(val.created_at),
+            updated_at: Set(val.updated_at),
+            upstream_id: Set(val.upstream_id),
+        }
+    }
+}
+
+impl From<UpstreamTargetCreateInfo> for upstream_target::ActiveModel {
+    fn from(val: UpstreamTargetCreateInfo) -> Self {
+        upstream_target::ActiveModel {
+            id: Set(Uuid::new_v4()),
+            target_host: Set(val.target_host),
+            target_port: Set(val.target_port),
+            weight: Set(val.weight),
+            is_backup: Set(val.is_backup),
+            enabled: Set(val.enabled),
+            created_at: Set(chrono::Utc::now()),
+            updated_at: Set(chrono::Utc::now()),
+            upstream_id: Set(val.upstream_id),
+        }
+    }
+}
+
+impl NginxConfigProvider for UpstreamTargetInfo {
+    fn to_nginx_config(&self, indent: Option<usize>) -> String {
+        format!(
+            "{}:{} weight={}{}{}",
+            self.target_host,
+            self.target_port,
+            self.weight,
+            if self.is_backup { " backup" } else { "" },
+            if !self.enabled { " down" } else { "" },
+        )
+        .indent(indent.unwrap_or(0))
+    }
+}
+
+impl UpdateUpstreamTargetInfo {
+    pub fn apply_to_model(
+        self,
+        current_model: upstream_target::Model,
+    ) -> upstream_target::ActiveModel {
+        upstream_target::ActiveModel {
+            id: Unchanged(current_model.id),
+            target_host: set_if_some!(self.target_host),
+            target_port: set_if_some!(self.target_port),
+            weight: set_if_some!(self.weight),
+            is_backup: set_if_some!(self.is_backup),
+            enabled: set_if_some!(self.enabled),
+            created_at: Unchanged(current_model.created_at),
+            updated_at: Set(chrono::Utc::now()),
+            upstream_id: Unchanged(current_model.upstream_id),
+        }
+    }
+}

apps/api/src/services/nginx/traits.rs

@@ -0,0 +1 @@
+pub mod indentable;

apps/api/src/services/nginx/traits/indentable.rs

@@ -0,0 +1,31 @@
+pub trait Indentable<T> {
+    fn indent(&self, spaces: T) -> String;
+}
+
+impl Indentable<usize> for &str {
+    fn indent(&self, spaces: usize) -> String {
+        let indent_str = " ".repeat(spaces);
+        self.lines()
+            .map(|line| format!("{}{}", indent_str, line))
+            .collect::<Vec<String>>()
+            .join("\n")
+    }
+}
+
+impl Indentable<Option<usize>> for String {
+    fn indent(&self, spaces: Option<usize>) -> String {
+        self.as_str().indent(spaces.unwrap_or(0))
+    }
+}
+
+impl Indentable<usize> for String {
+    fn indent(&self, spaces: usize) -> String {
+        self.as_str().indent(spaces)
+    }
+}
+
+impl Indentable<Option<usize>> for &str {
+    fn indent(&self, spaces: Option<usize>) -> String {
+        self.indent(spaces.unwrap_or(0))
+    }
+}

apps/api/src/services/nginx/upstream.rs

@@ -0,0 +1,823 @@
+use std::sync::Arc;
+
+use sea_orm::{
+    ActiveModelTrait, ColumnTrait, DatabaseConnection, DatabaseTransaction, EntityTrait,
+    ModelTrait, QueryFilter, QuerySelect, TransactionTrait,
+};
+
+use database::generated::entities::{upstream, upstream_target};
+
+use crate::{
+    errors::service_error::ServiceError,
+    helpers::database::PaginationFilter,
+    services::nginx::{
+        builder::NginxConfigBuilder,
+        info::{
+            upstream::{UpdateUpstreamInfo, UpstreamCreateInfo, UpstreamInfo},
+            upstream_target::{
+                UpdateUpstreamTargetInfo, UpstreamTargetCreateInfo, UpstreamTargetInfo,
+            },
+        },
+    },
+    with_conn,
+};
+
+#[async_trait::async_trait]
+pub trait UpstreamService: Send + Sync {
+    async fn create_upstream(
+        &self,
+        create_info: UpstreamCreateInfo,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<UpstreamInfo, ServiceError>;
+    async fn get_upstream(
+        &self,
+        upstream_id: uuid::Uuid,
+        options: Option<GetUpstreamOptions>,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<UpstreamInfo, ServiceError>;
+    async fn get_upstreams(
+        &self,
+        pagination: Option<PaginationFilter>,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<Vec<UpstreamInfo>, ServiceError>;
+    async fn update_upstream(
+        &self,
+        id: uuid::Uuid,
+        upstream: UpdateUpstreamInfo,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<UpstreamInfo, ServiceError>;
+    async fn delete_upstream(
+        &self,
+        upstream_id: uuid::Uuid,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<(), ServiceError>;
+    async fn create_upstream_target(
+        &self,
+        create_info: UpstreamTargetCreateInfo,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<UpstreamTargetInfo, ServiceError>;
+    async fn get_upstream_target(
+        &self,
+        target_id: uuid::Uuid,
+        options: Option<GetUpstreamTargetOptions>,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<UpstreamTargetInfo, ServiceError>;
+    #[allow(dead_code)]
+    async fn get_upstream_targets_by_upstream(
+        &self,
+        upstream_id: uuid::Uuid,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<Vec<UpstreamTargetInfo>, ServiceError>;
+    async fn update_upstream_target(
+        &self,
+        id: uuid::Uuid,
+        target: UpdateUpstreamTargetInfo,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<UpstreamTargetInfo, ServiceError>;
+    async fn delete_upstream_target(
+        &self,
+        target_id: uuid::Uuid,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<(), ServiceError>;
+    async fn generate_config(
+        &self,
+        builder: &mut NginxConfigBuilder,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<(), ServiceError>;
+}
+
+pub struct UpstreamServiceImpl {
+    connection: Arc<DatabaseConnection>,
+}
+
+#[derive(Default)]
+pub struct GetUpstreamOptions {
+    pub include_targets: bool,
+}
+
+#[derive(Default)]
+pub struct GetUpstreamTargetOptions {
+    pub include_upstream: bool,
+}
+
+impl UpstreamServiceImpl {
+    pub fn new(connection: Arc<DatabaseConnection>) -> Self {
+        Self { connection }
+    }
+}
+
+#[async_trait::async_trait]
+impl UpstreamService for UpstreamServiceImpl {
+    async fn create_upstream(
+        &self,
+        create_info: UpstreamCreateInfo,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<UpstreamInfo, ServiceError> {
+        let (upstream_model, upstream_target_models): (
+            upstream::ActiveModel,
+            Vec<upstream_target::ActiveModel>,
+        ) = create_info.into();
+
+        // If a transaction was provided use it, otherwise create and own one here.
+        let mut maybe_owned_tx: Option<DatabaseTransaction> = None;
+        let tx_ref: Option<&mut DatabaseTransaction> = if let Some(tx) = tx {
+            Some(tx)
+        } else {
+            maybe_owned_tx = Some(self.connection.begin().await?);
+            maybe_owned_tx.as_mut()
+        };
+
+        let r = with_conn!(&*self.connection, tx_ref, conn, {
+            let created_upstream = upstream_model.insert(*conn).await?;
+            let created_targets = upstream_target::Entity::insert_many(
+                upstream_target_models
+                    .into_iter()
+                    .map(|mut model| {
+                        model.upstream_id = sea_orm::ActiveValue::Set(created_upstream.id);
+                        model
+                    })
+                    .collect::<Vec<upstream_target::ActiveModel>>(),
+            )
+            .exec_with_returning(*conn)
+            .await?;
+            (created_upstream, created_targets)
+        });
+
+        // Commit only if we created the transaction here (we own it).
+        if let Some(t) = maybe_owned_tx.take() {
+            t.commit().await?;
+        }
+        Ok(r.into())
+    }
+
+    async fn get_upstream(
+        &self,
+        upstream_id: uuid::Uuid,
+        options: Option<GetUpstreamOptions>,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<UpstreamInfo, ServiceError> {
+        let concrete_options = options.unwrap_or_default();
+        let info: UpstreamInfo = if concrete_options.include_targets {
+            let (up_model, targets) = with_conn!(&*self.connection, tx, conn, {
+                let up = upstream::Entity::find_by_id(upstream_id)
+                    .one(*conn)
+                    .await?
+                    .ok_or(ServiceError::NotFound(format!(
+                        "Upstream with id {} not found",
+                        upstream_id
+                    )))?;
+                let targets = upstream_target::Entity::find()
+                    .filter(upstream_target::Column::UpstreamId.eq(upstream_id))
+                    .all(*conn)
+                    .await?;
+                (up, targets)
+            });
+            (up_model, targets).into()
+        } else {
+            with_conn!(&*self.connection, tx, conn, {
+                upstream::Entity::find_by_id(upstream_id)
+                    .one(*conn)
+                    .await?
+                    .ok_or(ServiceError::NotFound(format!(
+                        "Upstream with id {} not found",
+                        upstream_id
+                    )))?
+            })
+            .into()
+        };
+        Ok(info)
+    }
+
+    async fn get_upstreams(
+        &self,
+        pagination: Option<PaginationFilter>,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<Vec<UpstreamInfo>, ServiceError> {
+        let r = with_conn!(&*self.connection, tx, conn, {
+            let find_query = upstream::Entity::find();
+            let find_query = if let Some(pagination) = pagination {
+                let (offset, limit) = pagination.get_offset_limit();
+                find_query.offset(offset).limit(limit)
+            } else {
+                find_query
+            };
+            find_query.all(*conn).await?
+        });
+
+        Ok(r.into_iter().map(|m| m.into()).collect())
+    }
+
+    async fn update_upstream(
+        &self,
+        id: uuid::Uuid,
+        upstream: UpdateUpstreamInfo,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<UpstreamInfo, ServiceError> {
+        // If a transaction was provided use it, otherwise create and own one here.
+        let mut maybe_owned_tx: Option<DatabaseTransaction> = None;
+        let tx_ref: Option<&mut DatabaseTransaction> = if let Some(tx) = tx {
+            Some(tx)
+        } else {
+            maybe_owned_tx = Some(self.connection.begin().await?);
+            maybe_owned_tx.as_mut()
+        };
+
+        let current_model = with_conn!(&*self.connection, tx_ref, conn, {
+            upstream::Entity::find_by_id(id)
+                .one(*conn)
+                .await?
+                .ok_or(ServiceError::NotFound(format!(
+                    "Upstream with id {} not found",
+                    id
+                )))?
+        });
+        let upstream_active_model = upstream.clone().apply_to_model(current_model);
+
+        let r = with_conn!(&*self.connection, tx_ref, conn, {
+            let updated_upstream_model = upstream_active_model.update(*conn).await?;
+
+            // update upstream targets if any
+            if let Some(targets) = upstream.upstream_targets {
+                for (target_id, enabled) in targets.into_iter() {
+                    let target_model = upstream_target::Entity::find_by_id(target_id)
+                        .one(*conn)
+                        .await?
+                        .ok_or(ServiceError::NotFound(format!(
+                            "Upstream target with id {} not found",
+                            target_id
+                        )))?;
+                    let mut target_active_model: upstream_target::ActiveModel = target_model.into();
+                    target_active_model.enabled = sea_orm::ActiveValue::Set(enabled);
+
+                    target_active_model.update(*conn).await?;
+                    Ok::<(), ServiceError>(())?;
+                }
+            }
+
+            updated_upstream_model
+        });
+
+        // Commit
+        if let Some(t) = maybe_owned_tx.take() {
+            t.commit().await?;
+        }
+        Ok(r.into())
+    }
+
+    async fn delete_upstream(
+        &self,
+        upstream_id: uuid::Uuid,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<(), ServiceError> {
+        let model = with_conn!(&*self.connection, tx, conn, {
+            upstream::Entity::find_by_id(upstream_id)
+                .one(*conn)
+                .await?
+                .ok_or(ServiceError::NotFound(format!(
+                    "Upstream with id {} not found",
+                    upstream_id
+                )))?
+        });
+        with_conn!(&*self.connection, tx, conn, {
+            // delete all targets belonging to the upstream
+            upstream_target::Entity::delete_many()
+                .filter(upstream_target::Column::UpstreamId.eq(upstream_id))
+                .exec(*conn)
+                .await?;
+            model.delete(*conn).await?;
+            Ok(())
+        })
+    }
+
+    //
+    //
+    async fn create_upstream_target(
+        &self,
+        create_info: UpstreamTargetCreateInfo,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<UpstreamTargetInfo, ServiceError> {
+        let model: upstream_target::ActiveModel = create_info.into();
+        let r = with_conn!(&*self.connection, tx, conn, { model.insert(*conn).await? });
+        Ok(r.into())
+    }
+
+    async fn get_upstream_target(
+        &self,
+        target_id: uuid::Uuid,
+        options: Option<GetUpstreamTargetOptions>,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<UpstreamTargetInfo, ServiceError> {
+        let concrete_options = options.unwrap_or_default();
+        let info: UpstreamTargetInfo = if concrete_options.include_upstream {
+            match with_conn!(&*self.connection, tx, conn, {
+                upstream_target::Entity::find_by_id(target_id)
+                    .find_also_related(upstream::Entity)
+                    .one(*conn)
+                    .await?
+            }) {
+                Some((target_model, Some(upstream_model))) => (target_model, upstream_model).into(),
+                Some((_target_model, None)) => {
+                    return Err(ServiceError::InternalError(format!(
+                        "Inconsistent data: Upstream target with id {} has no associated upstream",
+                        target_id
+                    )));
+                }
+                None => {
+                    return Err(ServiceError::NotFound(format!(
+                        "Upstream target with id {} not found",
+                        target_id
+                    )));
+                }
+            }
+        } else {
+            with_conn!(&*self.connection, tx, conn, {
+                upstream_target::Entity::find_by_id(target_id)
+                    .one(*conn)
+                    .await?
+                    .ok_or(ServiceError::NotFound(format!(
+                        "Upstream target with id {} not found",
+                        target_id
+                    )))?
+            })
+            .into()
+        };
+        Ok(info)
+    }
+
+    async fn get_upstream_targets_by_upstream(
+        &self,
+        upstream_id: uuid::Uuid,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<Vec<UpstreamTargetInfo>, ServiceError> {
+        let r = with_conn!(&*self.connection, tx, conn, {
+            upstream_target::Entity::find()
+                .filter(upstream_target::Column::UpstreamId.eq(upstream_id))
+                .all(*conn)
+                .await?
+        });
+        Ok(r.into_iter().map(|m| m.into()).collect())
+    }
+
+    async fn update_upstream_target(
+        &self,
+        id: uuid::Uuid,
+        target: UpdateUpstreamTargetInfo,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<UpstreamTargetInfo, ServiceError> {
+        let current_model = with_conn!(&*self.connection, tx, conn, {
+            upstream_target::Entity::find_by_id(id)
+                .one(*conn)
+                .await?
+                .ok_or(ServiceError::NotFound(format!(
+                    "Upstream target with id {} not found",
+                    id
+                )))?
+        });
+        let active_model = target.apply_to_model(current_model);
+
+        let r = active_model.update(&*self.connection).await?;
+        Ok(r.into())
+    }
+
+    async fn delete_upstream_target(
+        &self,
+        target_id: uuid::Uuid,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<(), ServiceError> {
+        let model = with_conn!(&*self.connection, tx, conn, {
+            upstream_target::Entity::find_by_id(target_id)
+                .one(*conn)
+                .await?
+                .ok_or(ServiceError::NotFound(format!(
+                    "Upstream target with id {} not found",
+                    target_id
+                )))?
+        });
+        with_conn!(&*self.connection, tx, conn, {
+            model.delete(*conn).await?;
+            Ok(())
+        })
+    }
+
+    async fn generate_config(
+        &self,
+        builder: &mut NginxConfigBuilder,
+        tx: Option<&mut DatabaseTransaction>,
+    ) -> Result<(), ServiceError> {
+        // get all upstreams and their targets
+        let upstreams = with_conn!(&*self.connection, tx, conn, {
+            upstream::Entity::find()
+                .find_with_related(upstream_target::Entity)
+                .all(*conn)
+                .await?
+        });
+        let upstreams_info = upstreams
+            .into_iter()
+            .map(|(up_model, target_models)| (up_model, target_models).into())
+            .collect::<Vec<UpstreamInfo>>();
+        builder.add_upstreams(upstreams_info);
+        Ok(())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::sync::Arc;
+
+    use sea_orm::MockExecResult;
+    use sea_orm::{DatabaseBackend, MockDatabase};
+
+    use database::generated::entities::{upstream, upstream_target};
+
+    #[tokio::test]
+    async fn create_upstream_returns_info() {
+        let up_model = upstream::Model {
+            id: uuid::Uuid::new_v4(),
+            name: "test_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "round_robin".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![vec![up_model.clone()]])
+            .into_connection();
+
+        let svc = UpstreamServiceImpl::new(Arc::new(db));
+
+        let create_info = crate::services::nginx::info::upstream::UpstreamCreateInfo {
+            name: "test_upstream".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "round_robin".to_string(),
+            sticky_session: false,
+            created_by: None,
+            upstream_targets: Vec::new(),
+        };
+
+        let res = svc.create_upstream(create_info, None).await;
+        assert!(res.is_ok());
+        let info = res.expect("Failed to create upstream");
+        assert_eq!(info.name, "test_upstream");
+    }
+
+    #[tokio::test]
+    async fn get_upstream_with_targets_returns_targets() {
+        let up_id = uuid::Uuid::new_v4();
+
+        let up_model = upstream::Model {
+            id: up_id,
+            name: "with_targets".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "least_conn".to_string(),
+            sticky_session: true,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let target_model = upstream_target::Model {
+            id: uuid::Uuid::new_v4(),
+            upstream_id: up_id,
+            target_host: "127.0.0.1".to_string(),
+            target_port: 8080,
+            weight: 1,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            // find_by_id -> returns upstream model
+            .append_query_results(vec![vec![up_model.clone()]])
+            // find targets -> returns the target(s)
+            .append_query_results(vec![vec![target_model.clone()]])
+            .into_connection();
+
+        let svc = UpstreamServiceImpl::new(Arc::new(db));
+
+        let res = svc
+            .get_upstream(
+                up_id,
+                Some(GetUpstreamOptions {
+                    include_targets: true,
+                }),
+                None,
+            )
+            .await;
+
+        assert!(res.is_ok());
+        let info = res.expect("Failed to get upstream with targets");
+        assert_eq!(info.id, up_id);
+        assert_eq!(info.upstream_targets.len(), 1);
+        assert_eq!(info.upstream_targets[0].target_host, "127.0.0.1");
+    }
+
+    #[tokio::test]
+    async fn get_upstream_not_found_returns_not_found() {
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![Vec::<sea_orm::MockRow>::new()])
+            .into_connection();
+
+        let svc = UpstreamServiceImpl::new(Arc::new(db));
+
+        let res = svc.get_upstream(uuid::Uuid::new_v4(), None, None).await;
+
+        assert!(matches!(res, Err(ServiceError::NotFound(_))));
+    }
+
+    #[tokio::test]
+    async fn get_upstreams_returns_list() {
+        let u1 = upstream::Model {
+            id: uuid::Uuid::new_v4(),
+            name: "u1".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "rr".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+        let u2 = upstream::Model {
+            id: uuid::Uuid::new_v4(),
+            name: "u2".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "rr".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![vec![u1.clone(), u2.clone()]])
+            .into_connection();
+
+        let svc = UpstreamServiceImpl::new(Arc::new(db));
+
+        let res = svc.get_upstreams(None, None).await;
+        assert!(res.is_ok());
+        let list = res.expect("Failed to get upstreams");
+        assert_eq!(list.len(), 2);
+    }
+
+    #[tokio::test]
+    async fn get_upstream_targets_by_upstream_returns_targets() {
+        let up_id = uuid::Uuid::new_v4();
+
+        let t = upstream_target::Model {
+            id: uuid::Uuid::new_v4(),
+            upstream_id: up_id,
+            target_host: "10.0.0.1".to_string(),
+            target_port: 80,
+            weight: 10,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![vec![t.clone()]])
+            .into_connection();
+
+        let svc = UpstreamServiceImpl::new(Arc::new(db));
+
+        let res = svc.get_upstream_targets_by_upstream(up_id, None).await;
+        assert!(res.is_ok());
+        let targets = res.expect("Failed to get upstream targets");
+        assert_eq!(targets.len(), 1);
+        assert_eq!(targets[0].target_host, "10.0.0.1");
+    }
+
+    #[tokio::test]
+    async fn update_upstream_success() {
+        let id = uuid::Uuid::new_v4();
+        let existing = upstream::Model {
+            id,
+            name: "old".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "rr".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+        let updated = upstream::Model {
+            id,
+            name: "new".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "rr".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: existing.created_at,
+            updated_at: chrono::Utc::now(),
+        };
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![vec![existing.clone()]]) // find_by_id
+            .append_query_results(vec![vec![updated.clone()]]) // update result
+            .into_connection();
+
+        let svc = UpstreamServiceImpl::new(Arc::new(db));
+
+        let update_info = crate::services::nginx::info::upstream::UpdateUpstreamInfo {
+            name: None,
+            protocol: None,
+            algorithm: None,
+            sticky_session: None,
+            upstream_targets: None,
+        };
+        let res = svc.update_upstream(id, update_info, None).await;
+        assert!(res.is_ok());
+        let got = res.expect("Failed to update upstream");
+        assert_eq!(got.name, "new");
+    }
+
+    #[tokio::test]
+    async fn update_upstream_not_found() {
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![Vec::<sea_orm::MockRow>::new()])
+            .into_connection();
+
+        let svc = UpstreamServiceImpl::new(Arc::new(db));
+
+        let res = svc
+            .update_upstream(
+                uuid::Uuid::new_v4(),
+                crate::services::nginx::info::upstream::UpdateUpstreamInfo {
+                    name: None,
+                    protocol: None,
+                    algorithm: None,
+                    sticky_session: None,
+
+                    upstream_targets: None,
+                },
+                None,
+            )
+            .await;
+
+        assert!(matches!(res, Err(ServiceError::NotFound(_))));
+    }
+
+    #[tokio::test]
+    async fn delete_upstream_success() {
+        let id = uuid::Uuid::new_v4();
+        let existing = upstream::Model {
+            id,
+            name: "todelete".to_string(),
+            protocol: "http".to_string(),
+            algorithm: "rr".to_string(),
+            sticky_session: false,
+            created_by: None,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![vec![existing.clone()]])
+            .append_exec_results(vec![
+                MockExecResult {
+                    rows_affected: 1,
+                    last_insert_id: 0,
+                },
+                MockExecResult {
+                    rows_affected: 1,
+                    last_insert_id: 0,
+                },
+            ])
+            .into_connection();
+
+        let svc = UpstreamServiceImpl::new(Arc::new(db));
+
+        let res = svc.delete_upstream(id, None).await;
+        assert!(res.is_ok());
+    }
+
+    #[tokio::test]
+    async fn delete_upstream_not_found() {
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![Vec::<sea_orm::MockRow>::new()])
+            .into_connection();
+
+        let svc = UpstreamServiceImpl::new(Arc::new(db));
+
+        let res = svc.delete_upstream(uuid::Uuid::new_v4(), None).await;
+        assert!(matches!(res, Err(ServiceError::NotFound(_))));
+    }
+
+    #[tokio::test]
+    async fn create_upstream_target_success() {
+        let id = uuid::Uuid::new_v4();
+        let upstream_id = uuid::Uuid::new_v4();
+        let created = upstream_target::Model {
+            id,
+            upstream_id,
+            target_host: "1.2.3.4".to_string(),
+            target_port: 8080,
+            weight: 5,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![vec![created.clone()]])
+            .into_connection();
+
+        let svc = UpstreamServiceImpl::new(Arc::new(db));
+
+        let create_info = crate::services::nginx::info::upstream_target::UpstreamTargetCreateInfo {
+            target_host: "1.2.3.4".to_string(),
+            target_port: 8080,
+            weight: 5,
+            is_backup: false,
+            enabled: true,
+            upstream_id,
+        };
+
+        let res = svc.create_upstream_target(create_info, None).await;
+        assert!(res.is_ok());
+        let t = res.expect("Failed to create target");
+        assert_eq!(t.target_host, "1.2.3.4");
+    }
+
+    #[tokio::test]
+    async fn update_upstream_target_success() {
+        let id = uuid::Uuid::new_v4();
+        let existing = upstream_target::Model {
+            id,
+            upstream_id: uuid::Uuid::new_v4(),
+            target_host: "old".to_string(),
+            target_port: 80,
+            weight: 1,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+        let updated = upstream_target::Model {
+            id,
+            upstream_id: existing.upstream_id,
+            target_host: "new".to_string(),
+            target_port: 80,
+            weight: 1,
+            is_backup: false,
+            enabled: true,
+            created_at: existing.created_at,
+            updated_at: chrono::Utc::now(),
+        };
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![vec![existing.clone()]])
+            .append_query_results(vec![vec![updated.clone()]])
+            .into_connection();
+
+        let svc = UpstreamServiceImpl::new(Arc::new(db));
+
+        let update_info = crate::services::nginx::info::upstream_target::UpdateUpstreamTargetInfo {
+            target_host: None,
+            target_port: None,
+            weight: None,
+            is_backup: None,
+            enabled: None,
+        };
+        let res = svc.update_upstream_target(id, update_info, None).await;
+        assert!(res.is_ok());
+        let got = res.expect("Failed to update target");
+        assert_eq!(got.target_host, "new");
+    }
+
+    #[tokio::test]
+    async fn delete_upstream_target_success() {
+        let id = uuid::Uuid::new_v4();
+        let existing = upstream_target::Model {
+            id,
+            upstream_id: uuid::Uuid::new_v4(),
+            target_host: "del".to_string(),
+            target_port: 80,
+            weight: 1,
+            is_backup: false,
+            enabled: true,
+            created_at: chrono::Utc::now(),
+            updated_at: chrono::Utc::now(),
+        };
+
+        let db = MockDatabase::new(DatabaseBackend::Sqlite)
+            .append_query_results(vec![vec![existing.clone()]])
+            .append_exec_results(vec![MockExecResult {
+                rows_affected: 1,
+                last_insert_id: 0,
+            }])
+            .into_connection();
+
+        let svc = UpstreamServiceImpl::new(Arc::new(db));
+        let res = svc.delete_upstream_target(id, None).await;
+        assert!(res.is_ok());
+    }
+}

apps/api/swagger.json

@@ -106,6 +106,357 @@
         }
       }
     },
+    "/api/upstream_targets/{upstream_target_id}": {
+      "get": {
+        "tags": [
+          "Nginx"
+        ],
+        "operationId": "get_upstream_target",
+        "parameters": [
+          {
+            "name": "upstream_target_id",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string",
+              "format": "uuid"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Get upstream target info",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/UpstreamTargetInfo"
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "Not found"
+          },
+          "500": {
+            "description": "Internal server error"
+          }
+        }
+      },
+      "delete": {
+        "tags": [
+          "Nginx"
+        ],
+        "operationId": "remove_upstream_target",
+        "parameters": [
+          {
+            "name": "upstream_target_id",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string",
+              "format": "uuid"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Upstream target removed successfully",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "default": null
+                }
+              }
+            }
+          },
+          "401": {
+            "description": "Unauthorized"
+          },
+          "404": {
+            "description": "Not found"
+          },
+          "500": {
+            "description": "Internal server error"
+          }
+        }
+      },
+      "patch": {
+        "tags": [
+          "Nginx"
+        ],
+        "operationId": "update_upstream_target",
+        "parameters": [
+          {
+            "name": "upstream_target_id",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string",
+              "format": "uuid"
+            }
+          }
+        ],
+        "requestBody": {
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/UpdateUpstreamTargetRequestBody"
+              }
+            }
+          },
+          "required": true
+        },
+        "responses": {
+          "200": {
+            "description": "Upstream target updated successfully",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/UpdateUpstreamTargetInfoResponse"
+                }
+              }
+            }
+          },
+          "401": {
+            "description": "Unauthorized"
+          },
+          "404": {
+            "description": "Not found"
+          },
+          "422": {
+            "description": "Invalid request"
+          },
+          "500": {
+            "description": "Internal server error"
+          }
+        }
+      }
+    },
+    "/api/upstreams": {
+      "get": {
+        "tags": [
+          "Nginx"
+        ],
+        "operationId": "get_upstream_list",
+        "responses": {
+          "200": {
+            "description": "List upstreams",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/UpstreamListResponse"
+                }
+              }
+            }
+          },
+          "500": {
+            "description": "Internal server error"
+          }
+        }
+      },
+      "post": {
+        "tags": [
+          "Nginx"
+        ],
+        "operationId": "create_upstream",
+        "requestBody": {
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/CreateUpstreamRequestBody"
+              }
+            }
+          },
+          "required": true
+        },
+        "responses": {
+          "200": {
+            "description": "Upstream created successfully",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/UpstreamInfoResponse"
+                }
+              }
+            }
+          },
+          "401": {
+            "description": "Unauthorized"
+          },
+          "422": {
+            "description": "Invalid request"
+          },
+          "500": {
+            "description": "Internal server error"
+          }
+        }
+      }
+    },
+    "/api/upstreams/{upstream_id}": {
+      "get": {
+        "tags": [
+          "Nginx"
+        ],
+        "operationId": "get_upstream",
+        "parameters": [
+          {
+            "name": "upstream_id",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string",
+              "format": "uuid"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Get upstream info",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/UpstreamInfoResponse"
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "Not found"
+          },
+          "500": {
+            "description": "Internal server error"
+          }
+        }
+      },
+      "delete": {
+        "tags": [
+          "Nginx"
+        ],
+        "operationId": "remove_upstream",
+        "parameters": [
+          {
+            "name": "upstream_id",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string",
+              "format": "uuid"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Upstream removed successfully",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "default": null
+                }
+              }
+            }
+          },
+          "401": {
+            "description": "Unauthorized"
+          },
+          "404": {
+            "description": "Not found"
+          },
+          "500": {
+            "description": "Internal server error"
+          }
+        }
+      },
+      "patch": {
+        "tags": [
+          "Nginx"
+        ],
+        "operationId": "update_upstream",
+        "parameters": [
+          {
+            "name": "upstream_id",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string",
+              "format": "uuid"
+            }
+          }
+        ],
+        "requestBody": {
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/UpdateUpstreamRequestBody"
+              }
+            }
+          },
+          "required": true
+        },
+        "responses": {
+          "200": {
+            "description": "Upstream updated successfully",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/UpdateUpstreamInfoResponse"
+                }
+              }
+            }
+          },
+          "401": {
+            "description": "Unauthorized"
+          },
+          "404": {
+            "description": "Not found"
+          },
+          "422": {
+            "description": "Invalid request"
+          },
+          "500": {
+            "description": "Internal server error"
+          }
+        }
+      }
+    },
+    "/api/upstreams/{upstream_id}/targets": {
+      "post": {
+        "tags": [
+          "Nginx"
+        ],
+        "operationId": "add_upstream_target",
+        "requestBody": {
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/CreateUpstreamTargetInfo"
+              }
+            }
+          },
+          "required": true
+        },
+        "responses": {
+          "200": {
+            "description": "Upstream target created successfully",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/UpstreamTargetInfoResponse"
+                }
+              }
+            }
+          },
+          "401": {
+            "description": "Unauthorized"
+          },
+          "422": {
+            "description": "Invalid request"
+          },
+          "500": {
+            "description": "Internal server error"
+          }
+        }
+      }
+    },
     "/api/user/me": {
       "get": {
         "tags": [
@@ -157,6 +508,102 @@
           }
         }
       },
+      "CreateUpstreamRequestBody": {
+        "type": "object",
+        "required": [
+          "name",
+          "protocol",
+          "upstream_targets"
+        ],
+        "properties": {
+          "algorithm": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "name": {
+            "type": "string"
+          },
+          "protocol": {
+            "type": "string"
+          },
+          "sticky_session": {
+            "type": [
+              "boolean",
+              "null"
+            ]
+          },
+          "upstream_targets": {
+            "type": "array",
+            "items": {
+              "$ref": "#/components/schemas/UpstreamTargetInfo"
+            }
+          }
+        }
+      },
+      "CreateUpstreamTargetInfo": {
+        "type": "object",
+        "required": [
+          "upstream_id",
+          "host",
+          "port"
+        ],
+        "properties": {
+          "enabled": {
+            "type": [
+              "boolean",
+              "null"
+            ]
+          },
+          "host": {
+            "type": "string"
+          },
+          "is_backup": {
+            "type": [
+              "boolean",
+              "null"
+            ]
+          },
+          "port": {
+            "type": "integer",
+            "format": "int64"
+          },
+          "upstream_id": {
+            "type": "string",
+            "format": "uuid"
+          },
+          "weight": {
+            "type": [
+              "integer",
+              "null"
+            ],
+            "format": "int64"
+          }
+        }
+      },
+      "GetUpstreamParams": {
+        "type": "object",
+        "properties": {
+          "include_targets": {
+            "type": [
+              "boolean",
+              "null"
+            ]
+          }
+        }
+      },
+      "GetUpstreamTargetsParams": {
+        "type": "object",
+        "properties": {
+          "include_upstream": {
+            "type": [
+              "boolean",
+              "null"
+            ]
+          }
+        }
+      },
       "HealthInfo": {
         "type": "object",
         "description": "System health information",
@@ -212,6 +659,486 @@
           }
         }
       },
+      "PaginationInfo": {
+        "type": "object",
+        "description": "Pagination information included in API responses",
+        "required": [
+          "total_items",
+          "total_pages",
+          "current_page",
+          "per_page"
+        ],
+        "properties": {
+          "current_page": {
+            "type": "integer",
+            "format": "int32",
+            "description": "Current page number",
+            "minimum": 0
+          },
+          "per_page": {
+            "type": "integer",
+            "format": "int32",
+            "description": "Items per page",
+            "minimum": 0
+          },
+          "total_items": {
+            "type": "integer",
+            "format": "int64",
+            "description": "Total number of items",
+            "minimum": 0
+          },
+          "total_pages": {
+            "type": "integer",
+            "format": "int32",
+            "description": "Total number of pages",
+            "minimum": 0
+          }
+        }
+      },
+      "UpdateUpstreamInfoResponse": {
+        "type": "object",
+        "required": [
+          "id",
+          "name",
+          "protocol",
+          "algorithm",
+          "sticky_session",
+          "created_at",
+          "updated_at",
+          "upstream_targets"
+        ],
+        "properties": {
+          "algorithm": {
+            "type": "string"
+          },
+          "created_at": {
+            "type": "string",
+            "format": "date-time"
+          },
+          "created_by": {
+            "type": [
+              "string",
+              "null"
+            ],
+            "format": "uuid"
+          },
+          "id": {
+            "type": "string",
+            "format": "uuid"
+          },
+          "name": {
+            "type": "string"
+          },
+          "protocol": {
+            "type": "string"
+          },
+          "sticky_session": {
+            "type": "boolean"
+          },
+          "updated_at": {
+            "type": "string",
+            "format": "date-time"
+          },
+          "upstream_targets": {
+            "type": "array",
+            "items": {
+              "$ref": "#/components/schemas/UpstreamTargetBasicInfo"
+            }
+          }
+        }
+      },
+      "UpdateUpstreamRequestBody": {
+        "type": "object",
+        "properties": {
+          "algorithm": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "name": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "protocol": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "sticky_session": {
+            "type": [
+              "boolean",
+              "null"
+            ]
+          },
+          "upstream_targets": {
+            "type": [
+              "array",
+              "null"
+            ],
+            "items": {
+              "$ref": "#/components/schemas/UpstreamTargetBasicUpdateInfo"
+            }
+          }
+        }
+      },
+      "UpdateUpstreamTargetInfoResponse": {
+        "type": "object",
+        "required": [
+          "id",
+          "host",
+          "port",
+          "enabled",
+          "is_backup",
+          "weight",
+          "created_at",
+          "updated_at",
+          "upstream_id"
+        ],
+        "properties": {
+          "created_at": {
+            "type": "string",
+            "format": "date-time"
+          },
+          "enabled": {
+            "type": "boolean"
+          },
+          "host": {
+            "type": "string"
+          },
+          "id": {
+            "type": "string",
+            "format": "uuid"
+          },
+          "is_backup": {
+            "type": "boolean"
+          },
+          "port": {
+            "type": "integer",
+            "format": "int64"
+          },
+          "updated_at": {
+            "type": "string",
+            "format": "date-time"
+          },
+          "upstream_id": {
+            "type": "string",
+            "format": "uuid"
+          },
+          "weight": {
+            "type": "integer",
+            "format": "int32"
+          }
+        }
+      },
+      "UpdateUpstreamTargetRequestBody": {
+        "type": "object",
+        "properties": {
+          "enabled": {
+            "type": [
+              "boolean",
+              "null"
+            ]
+          },
+          "host": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "is_backup": {
+            "type": [
+              "boolean",
+              "null"
+            ]
+          },
+          "port": {
+            "type": [
+              "integer",
+              "null"
+            ],
+            "format": "int64"
+          },
+          "weight": {
+            "type": [
+              "integer",
+              "null"
+            ],
+            "format": "int32"
+          }
+        }
+      },
+      "UpstreamBasicInfo": {
+        "type": "object",
+        "required": [
+          "id",
+          "name",
+          "protocol",
+          "created_at",
+          "updated_at"
+        ],
+        "properties": {
+          "created_at": {
+            "type": "string",
+            "format": "date-time"
+          },
+          "id": {
+            "type": "string",
+            "format": "uuid"
+          },
+          "name": {
+            "type": "string"
+          },
+          "protocol": {
+            "type": "string"
+          },
+          "updated_at": {
+            "type": "string",
+            "format": "date-time"
+          }
+        }
+      },
+      "UpstreamInfoResponse": {
+        "type": "object",
+        "required": [
+          "id",
+          "name",
+          "protocol",
+          "algorithm",
+          "sticky_session",
+          "created_at",
+          "updated_at",
+          "upstream_targets"
+        ],
+        "properties": {
+          "algorithm": {
+            "type": "string"
+          },
+          "created_at": {
+            "type": "string",
+            "format": "date-time"
+          },
+          "created_by": {
+            "type": [
+              "string",
+              "null"
+            ],
+            "format": "uuid"
+          },
+          "id": {
+            "type": "string",
+            "format": "uuid"
+          },
+          "name": {
+            "type": "string"
+          },
+          "protocol": {
+            "type": "string"
+          },
+          "sticky_session": {
+            "type": "boolean"
+          },
+          "updated_at": {
+            "type": "string",
+            "format": "date-time"
+          },
+          "upstream_targets": {
+            "type": "array",
+            "items": {
+              "$ref": "#/components/schemas/UpstreamTargetBasicInfo"
+            }
+          }
+        }
+      },
+      "UpstreamListResponse": {
+        "type": "object",
+        "required": [
+          "items",
+          "pagination"
+        ],
+        "properties": {
+          "items": {
+            "type": "array",
+            "items": {
+              "$ref": "#/components/schemas/UpstreamInfoResponse"
+            }
+          },
+          "pagination": {
+            "$ref": "#/components/schemas/PaginationInfo"
+          }
+        }
+      },
+      "UpstreamTargetBasicInfo": {
+        "type": "object",
+        "required": [
+          "id",
+          "target_host",
+          "target_port",
+          "enabled",
+          "is_backup",
+          "weight",
+          "created_at",
+          "updated_at"
+        ],
+        "properties": {
+          "created_at": {
+            "type": "string",
+            "format": "date-time"
+          },
+          "enabled": {
+            "type": "boolean"
+          },
+          "id": {
+            "type": "string",
+            "format": "uuid"
+          },
+          "is_backup": {
+            "type": "boolean"
+          },
+          "target_host": {
+            "type": "string"
+          },
+          "target_port": {
+            "type": "integer",
+            "format": "int64"
+          },
+          "updated_at": {
+            "type": "string",
+            "format": "date-time"
+          },
+          "weight": {
+            "type": "integer",
+            "format": "int32"
+          }
+        }
+      },
+      "UpstreamTargetBasicUpdateInfo": {
+        "type": "object",
+        "required": [
+          "id",
+          "enabled"
+        ],
+        "properties": {
+          "enabled": {
+            "type": "boolean"
+          },
+          "id": {
+            "type": "integer",
+            "format": "int64"
+          }
+        }
+      },
+      "UpstreamTargetInfo": {
+        "type": "object",
+        "required": [
+          "id",
+          "target_host",
+          "target_port",
+          "enabled",
+          "is_backup",
+          "weight",
+          "created_at",
+          "updated_at",
+          "upstream_id"
+        ],
+        "properties": {
+          "created_at": {
+            "type": "string",
+            "format": "date-time"
+          },
+          "enabled": {
+            "type": "boolean"
+          },
+          "id": {
+            "type": "string",
+            "format": "uuid"
+          },
+          "is_backup": {
+            "type": "boolean"
+          },
+          "target_host": {
+            "type": "string"
+          },
+          "target_port": {
+            "type": "integer",
+            "format": "int64"
+          },
+          "updated_at": {
+            "type": "string",
+            "format": "date-time"
+          },
+          "upstream": {
+            "oneOf": [
+              {
+                "type": "null"
+              },
+              {
+                "$ref": "#/components/schemas/UpstreamBasicInfo"
+              }
+            ]
+          },
+          "upstream_id": {
+            "type": "string",
+            "format": "uuid"
+          },
+          "weight": {
+            "type": "integer",
+            "format": "int32"
+          }
+        }
+      },
+      "UpstreamTargetInfoResponse": {
+        "type": "object",
+        "required": [
+          "id",
+          "host",
+          "port",
+          "enabled",
+          "is_backup",
+          "weight",
+          "created_at",
+          "updated_at",
+          "upstream_id"
+        ],
+        "properties": {
+          "created_at": {
+            "type": "string",
+            "format": "date-time"
+          },
+          "enabled": {
+            "type": "boolean"
+          },
+          "host": {
+            "type": "string"
+          },
+          "id": {
+            "type": "string",
+            "format": "uuid"
+          },
+          "is_backup": {
+            "type": "boolean"
+          },
+          "port": {
+            "type": "integer",
+            "format": "int64"
+          },
+          "updated_at": {
+            "type": "string",
+            "format": "date-time"
+          },
+          "upstream_id": {
+            "type": "string",
+            "format": "uuid"
+          },
+          "weight": {
+            "type": "integer",
+            "format": "int32"
+          }
+        }
+      },
       "UserInfo": {
         "type": "object",
         "description": "System health information",
@@ -245,6 +1172,10 @@
     {
       "name": "User",
       "description": "User management API"
+    },
+    {
+      "name": "Nginx",
+      "description": "Nginx management API"
     }
   ]
 }

apps/frontend/app/generated/api-client/api-client.ts

@@ -1,6 +1,42 @@
 export namespace Schemas {
   // <Schemas>
   export type AdminInitRequest = { password: string; setup_secret: string; username: string };
+  export type UpstreamBasicInfo = {
+    created_at: string;
+    id: string;
+    name: string;
+    protocol: string;
+    updated_at: string;
+  };
+  export type UpstreamTargetInfo = {
+    created_at: string;
+    enabled: boolean;
+    id: string;
+    is_backup: boolean;
+    target_host: string;
+    target_port: number;
+    updated_at: string;
+    upstream?: (null | UpstreamBasicInfo) | undefined;
+    upstream_id: string;
+    weight: number;
+  };
+  export type CreateUpstreamRequestBody = {
+    algorithm?: (string | null) | undefined;
+    name: string;
+    protocol: string;
+    sticky_session?: (boolean | null) | undefined;
+    upstream_targets: Array<UpstreamTargetInfo>;
+  };
+  export type CreateUpstreamTargetInfo = {
+    enabled?: (boolean | null) | undefined;
+    host: string;
+    is_backup?: (boolean | null) | undefined;
+    port: number;
+    upstream_id: string;
+    weight?: (number | null) | undefined;
+  };
+  export type GetUpstreamParams = Partial<{ include_targets: boolean | null }>;
+  export type GetUpstreamTargetsParams = Partial<{ include_upstream: boolean | null }>;
   export type HealthInfo = {
     errors?: (Array<string> | null) | undefined;
     is_initialized: boolean;
@@ -9,6 +45,77 @@ export namespace Schemas {
     version: string;
   };
   export type LoginRequest = { password: string; username: string };
+  export type PaginationInfo = { current_page: number; per_page: number; total_items: number; total_pages: number };
+  export type UpstreamTargetBasicInfo = {
+    created_at: string;
+    enabled: boolean;
+    id: string;
+    is_backup: boolean;
+    target_host: string;
+    target_port: number;
+    updated_at: string;
+    weight: number;
+  };
+  export type UpdateUpstreamInfoResponse = {
+    algorithm: string;
+    created_at: string;
+    created_by?: (string | null) | undefined;
+    id: string;
+    name: string;
+    protocol: string;
+    sticky_session: boolean;
+    updated_at: string;
+    upstream_targets: Array<UpstreamTargetBasicInfo>;
+  };
+  export type UpdateUpstreamRequestBody = Partial<{
+    algorithm: string | null;
+    name: string | null;
+    protocol: string | null;
+    sticky_session: boolean | null;
+    upstream_targets: Array<UpstreamTargetBasicUpdateInfo> | null;
+  }>;
+  export type UpdateUpstreamTargetInfoResponse = {
+    created_at: string;
+    enabled: boolean;
+    host: string;
+    id: string;
+    is_backup: boolean;
+    port: number;
+    updated_at: string;
+    upstream_id: string;
+    weight: number;
+  };
+  export type UpdateUpstreamTargetRequestBody = Partial<{
+    enabled: boolean | null;
+    host: string | null;
+    is_backup: boolean | null;
+    port: number | null;
+    weight: number | null;
+  }>;
+  export type UpstreamInfoResponse = {
+    algorithm: string;
+    created_at: string;
+    created_by?: (string | null) | undefined;
+    id: string;
+    name: string;
+    protocol: string;
+    sticky_session: boolean;
+    updated_at: string;
+    upstream_targets: Array<UpstreamTargetBasicInfo>;
+  };
+  export type UpstreamListResponse = { items: Array<UpstreamInfoResponse>; pagination: PaginationInfo };
+  export type UpstreamTargetBasicUpdateInfo = { enabled: boolean; id: number };
+  export type UpstreamTargetInfoResponse = {
+    created_at: string;
+    enabled: boolean;
+    host: string;
+    id: string;
+    is_backup: boolean;
+    port: number;
+    updated_at: string;
+    upstream_id: string;
+    weight: number;
+  };
   export type UserInfo = { id: string; username: string };
 
   // </Schemas>
@@ -42,6 +149,95 @@ export namespace Endpoints {
     parameters: never;
     responses: { 200: Schemas.HealthInfo; 404: unknown };
   };
+  export type get_Get_upstream_target = {
+    method: "GET";
+    path: "/api/upstream_targets/{upstream_target_id}";
+    requestFormat: "json";
+    parameters: {
+      path: { upstream_target_id: string };
+    };
+    responses: { 200: Schemas.UpstreamTargetInfo; 404: unknown; 500: unknown };
+  };
+  export type delete_Remove_upstream_target = {
+    method: "DELETE";
+    path: "/api/upstream_targets/{upstream_target_id}";
+    requestFormat: "json";
+    parameters: {
+      path: { upstream_target_id: string };
+    };
+    responses: { 200: unknown; 401: unknown; 404: unknown; 500: unknown };
+  };
+  export type patch_Update_upstream_target = {
+    method: "PATCH";
+    path: "/api/upstream_targets/{upstream_target_id}";
+    requestFormat: "json";
+    parameters: {
+      path: { upstream_target_id: string };
+
+      body: Schemas.UpdateUpstreamTargetRequestBody;
+    };
+    responses: {
+      200: Schemas.UpdateUpstreamTargetInfoResponse;
+      401: unknown;
+      404: unknown;
+      422: unknown;
+      500: unknown;
+    };
+  };
+  export type get_Get_upstream_list = {
+    method: "GET";
+    path: "/api/upstreams";
+    requestFormat: "json";
+    parameters: never;
+    responses: { 200: Schemas.UpstreamListResponse; 500: unknown };
+  };
+  export type post_Create_upstream = {
+    method: "POST";
+    path: "/api/upstreams";
+    requestFormat: "json";
+    parameters: {
+      body: Schemas.CreateUpstreamRequestBody;
+    };
+    responses: { 200: Schemas.UpstreamInfoResponse; 401: unknown; 422: unknown; 500: unknown };
+  };
+  export type get_Get_upstream = {
+    method: "GET";
+    path: "/api/upstreams/{upstream_id}";
+    requestFormat: "json";
+    parameters: {
+      path: { upstream_id: string };
+    };
+    responses: { 200: Schemas.UpstreamInfoResponse; 404: unknown; 500: unknown };
+  };
+  export type delete_Remove_upstream = {
+    method: "DELETE";
+    path: "/api/upstreams/{upstream_id}";
+    requestFormat: "json";
+    parameters: {
+      path: { upstream_id: string };
+    };
+    responses: { 200: unknown; 401: unknown; 404: unknown; 500: unknown };
+  };
+  export type patch_Update_upstream = {
+    method: "PATCH";
+    path: "/api/upstreams/{upstream_id}";
+    requestFormat: "json";
+    parameters: {
+      path: { upstream_id: string };
+
+      body: Schemas.UpdateUpstreamRequestBody;
+    };
+    responses: { 200: Schemas.UpdateUpstreamInfoResponse; 401: unknown; 404: unknown; 422: unknown; 500: unknown };
+  };
+  export type post_Add_upstream_target = {
+    method: "POST";
+    path: "/api/upstreams/{upstream_id}/targets";
+    requestFormat: "json";
+    parameters: {
+      body: Schemas.CreateUpstreamTargetInfo;
+    };
+    responses: { 200: Schemas.UpstreamTargetInfoResponse; 401: unknown; 422: unknown; 500: unknown };
+  };
   export type get_Get_user_info = {
     method: "GET";
     path: "/api/user/me";
@@ -58,11 +254,24 @@ export type EndpointByMethod = {
   post: {
     "/api/auth/init_admin": Endpoints.post_Init_admin;
     "/api/auth/login": Endpoints.post_Login;
+    "/api/upstreams": Endpoints.post_Create_upstream;
+    "/api/upstreams/{upstream_id}/targets": Endpoints.post_Add_upstream_target;
   };
   get: {
     "/api/health/info": Endpoints.get_Get_health_info;
+    "/api/upstream_targets/{upstream_target_id}": Endpoints.get_Get_upstream_target;
+    "/api/upstreams": Endpoints.get_Get_upstream_list;
+    "/api/upstreams/{upstream_id}": Endpoints.get_Get_upstream;
     "/api/user/me": Endpoints.get_Get_user_info;
   };
+  delete: {
+    "/api/upstream_targets/{upstream_target_id}": Endpoints.delete_Remove_upstream_target;
+    "/api/upstreams/{upstream_id}": Endpoints.delete_Remove_upstream;
+  };
+  patch: {
+    "/api/upstream_targets/{upstream_target_id}": Endpoints.patch_Update_upstream_target;
+    "/api/upstreams/{upstream_id}": Endpoints.patch_Update_upstream;
+  };
 };
 
 // </EndpointByMethod>
@@ -70,6 +279,8 @@ export type EndpointByMethod = {
 // <EndpointByMethod.Shorthands>
 export type PostEndpoints = EndpointByMethod["post"];
 export type GetEndpoints = EndpointByMethod["get"];
+export type DeleteEndpoints = EndpointByMethod["delete"];
+export type PatchEndpoints = EndpointByMethod["patch"];
 // </EndpointByMethod.Shorthands>
 
 // <ApiClientTypes>
@@ -364,6 +575,68 @@ export class ApiClient {
   }
   // </ApiClient.get>
 
+  // <ApiClient.delete>
+  delete<Path extends keyof DeleteEndpoints, TEndpoint extends DeleteEndpoints[Path]>(
+    path: Path,
+    ...params: MaybeOptionalArg<
+      TEndpoint extends { parameters: infer UParams }
+        ? NotNever<UParams> extends true
+          ? UParams & { overrides?: RequestInit; withResponse?: false; throwOnStatusError?: boolean }
+          : { overrides?: RequestInit; withResponse?: false; throwOnStatusError?: boolean }
+        : { overrides?: RequestInit; withResponse?: false; throwOnStatusError?: boolean }
+    >
+  ): Promise<Extract<InferResponseByStatus<TEndpoint, SuccessStatusCode>, { data: {} }>["data"]>;
+
+  delete<Path extends keyof DeleteEndpoints, TEndpoint extends DeleteEndpoints[Path]>(
+    path: Path,
+    ...params: MaybeOptionalArg<
+      TEndpoint extends { parameters: infer UParams }
+        ? NotNever<UParams> extends true
+          ? UParams & { overrides?: RequestInit; withResponse?: true; throwOnStatusError?: boolean }
+          : { overrides?: RequestInit; withResponse?: true; throwOnStatusError?: boolean }
+        : { overrides?: RequestInit; withResponse?: true; throwOnStatusError?: boolean }
+    >
+  ): Promise<SafeApiResponse<TEndpoint>>;
+
+  delete<Path extends keyof DeleteEndpoints, _TEndpoint extends DeleteEndpoints[Path]>(
+    path: Path,
+    ...params: MaybeOptionalArg<any>
+  ): Promise<any> {
+    return this.request("delete", path, ...params);
+  }
+  // </ApiClient.delete>
+
+  // <ApiClient.patch>
+  patch<Path extends keyof PatchEndpoints, TEndpoint extends PatchEndpoints[Path]>(
+    path: Path,
+    ...params: MaybeOptionalArg<
+      TEndpoint extends { parameters: infer UParams }
+        ? NotNever<UParams> extends true
+          ? UParams & { overrides?: RequestInit; withResponse?: false; throwOnStatusError?: boolean }
+          : { overrides?: RequestInit; withResponse?: false; throwOnStatusError?: boolean }
+        : { overrides?: RequestInit; withResponse?: false; throwOnStatusError?: boolean }
+    >
+  ): Promise<Extract<InferResponseByStatus<TEndpoint, SuccessStatusCode>, { data: {} }>["data"]>;
+
+  patch<Path extends keyof PatchEndpoints, TEndpoint extends PatchEndpoints[Path]>(
+    path: Path,
+    ...params: MaybeOptionalArg<
+      TEndpoint extends { parameters: infer UParams }
+        ? NotNever<UParams> extends true
+          ? UParams & { overrides?: RequestInit; withResponse?: true; throwOnStatusError?: boolean }
+          : { overrides?: RequestInit; withResponse?: true; throwOnStatusError?: boolean }
+        : { overrides?: RequestInit; withResponse?: true; throwOnStatusError?: boolean }
+    >
+  ): Promise<SafeApiResponse<TEndpoint>>;
+
+  patch<Path extends keyof PatchEndpoints, _TEndpoint extends PatchEndpoints[Path]>(
+    path: Path,
+    ...params: MaybeOptionalArg<any>
+  ): Promise<any> {
+    return this.request("patch", path, ...params);
+  }
+  // </ApiClient.patch>
+
   // <ApiClient.request>
   /**
    * Generic request method with full type-safety for any endpoint

apps/frontend/app/generated/api-client/tanstack-client.ts

@@ -43,6 +43,8 @@ const createQueryKey = <TOptions extends EndpointParameters>(
 // <EndpointByMethod.Shorthands>
 export type PostEndpoints = EndpointByMethod["post"];
 export type GetEndpoints = EndpointByMethod["get"];
+export type DeleteEndpoints = EndpointByMethod["delete"];
+export type PatchEndpoints = EndpointByMethod["patch"];
 // </EndpointByMethod.Shorthands>
 
 // <ApiClientTypes>
@@ -130,6 +132,66 @@ export class TanstackQueryApiClient {
   }
   // </ApiClient.get>
 
+  // <ApiClient.delete>
+  delete<Path extends keyof DeleteEndpoints, TEndpoint extends DeleteEndpoints[Path]>(
+    path: Path,
+    ...params: MaybeOptionalArg<TEndpoint["parameters"]>
+  ) {
+    const queryKey = createQueryKey(path as string, params[0]);
+    const query = {
+      /** type-only property if you need easy access to the endpoint params */
+      "~endpoint": {} as TEndpoint,
+      queryKey,
+      queryFn: {} as "You need to pass .queryOptions to the useQuery hook",
+      queryOptions: queryOptions({
+        queryFn: async ({ queryKey, signal }) => {
+          const requestParams = {
+            ...(params[0] || {}),
+            ...(queryKey[0] || {}),
+            overrides: { signal },
+            withResponse: false as const,
+          };
+          const res = await this.client.delete(path, requestParams as never);
+          return res as InferResponseData<TEndpoint, SuccessStatusCode>;
+        },
+        queryKey: queryKey,
+      }),
+    };
+
+    return query;
+  }
+  // </ApiClient.delete>
+
+  // <ApiClient.patch>
+  patch<Path extends keyof PatchEndpoints, TEndpoint extends PatchEndpoints[Path]>(
+    path: Path,
+    ...params: MaybeOptionalArg<TEndpoint["parameters"]>
+  ) {
+    const queryKey = createQueryKey(path as string, params[0]);
+    const query = {
+      /** type-only property if you need easy access to the endpoint params */
+      "~endpoint": {} as TEndpoint,
+      queryKey,
+      queryFn: {} as "You need to pass .queryOptions to the useQuery hook",
+      queryOptions: queryOptions({
+        queryFn: async ({ queryKey, signal }) => {
+          const requestParams = {
+            ...(params[0] || {}),
+            ...(queryKey[0] || {}),
+            overrides: { signal },
+            withResponse: false as const,
+          };
+          const res = await this.client.patch(path, requestParams as never);
+          return res as InferResponseData<TEndpoint, SuccessStatusCode>;
+        },
+        queryKey: queryKey,
+      }),
+    };
+
+    return query;
+  }
+  // </ApiClient.patch>
+
   // <ApiClient.request>
   /**
    * Generic mutation method with full type-safety for any endpoint; it doesnt require parameters to be passed initially

public/database/src/generated/entities/mod.rs

@@ -3,5 +3,7 @@
 pub mod prelude;
 
 pub mod config;
+pub mod upstream;
+pub mod upstream_target;
 pub mod user;
 pub mod user_identity;

public/database/src/generated/entities/prelude.rs

@@ -1,5 +1,7 @@
 //! `SeaORM` Entity, @generated by sea-orm-codegen 2.0.0-rc.18
 
 pub use super::config::Entity as Config;
+pub use super::upstream::Entity as Upstream;
+pub use super::upstream_target::Entity as UpstreamTarget;
 pub use super::user::Entity as User;
 pub use super::user_identity::Entity as UserIdentity;

public/database/src/generated/entities/upstream.rs

@@ -0,0 +1,23 @@
+//! `SeaORM` Entity, @generated by sea-orm-codegen 2.0.0-rc.18
+
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+#[sea_orm::model]
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel, Serialize, Deserialize)]
+#[sea_orm(table_name = "upstream")]
+pub struct Model {
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub id: Uuid,
+    pub name: String,
+    pub protocol: String,
+    pub algorithm: String,
+    pub sticky_session: bool,
+    pub created_by: Option<Uuid>,
+    pub created_at: DateTimeUtc,
+    pub updated_at: DateTimeUtc,
+    #[sea_orm(has_many)]
+    pub upstream_targets: HasMany<super::upstream_target::Entity>,
+}
+
+impl ActiveModelBehavior for ActiveModel {}

public/database/src/generated/entities/upstream_target.rs

@@ -5,25 +5,26 @@ use serde::{Deserialize, Serialize};
 
 #[sea_orm::model]
 #[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel, Serialize, Deserialize)]
-#[sea_orm(table_name = "session")]
+#[sea_orm(table_name = "upstream_target")]
 pub struct Model {
     #[sea_orm(primary_key, auto_increment = false)]
     pub id: Uuid,
-    pub user_id: Uuid,
+    pub upstream_id: Uuid,
-    #[sea_orm(unique)]
+    pub target_host: String,
-    pub refresh_token_hash: Option<String>,
+    pub target_port: i64,
-    pub expires_at: DateTimeUtc,
+    pub weight: i64,
-    pub revoked_at: Option<DateTimeUtc>,
+    pub is_backup: bool,
+    pub enabled: bool,
     pub created_at: DateTimeUtc,
     pub updated_at: DateTimeUtc,
     #[sea_orm(
         belongs_to,
-        from = "user_id",
+        from = "upstream_id",
         to = "id",
         on_update = "Cascade",
         on_delete = "Cascade"
     )]
-    pub user: HasOne<super::user::Entity>,
+    pub upstream: HasOne<super::upstream::Entity>,
 }
 
 impl ActiveModelBehavior for ActiveModel {}

public/migration/doc/nginx-tables.md

@@ -0,0 +1,208 @@
+# Migration Tables → nginx mapping
+
+This document explains the purpose of each migration table added under `public/migration/src/migrations` and how the rows map to generated nginx configuration (HTTP `http {}` and `stream {}` contexts).
+
+Summary of tables covered:
+
+- `upstream`
+- `upstream_target`
+- `proxy_host`
+- `location`
+- `stream_service`
+- `access_list`
+- `access_list_entry`
+- `audit_log`
+
+---
+
+## `upstream`
+
+Purpose: A named backend pool of servers. Shared by HTTP and stream services.
+
+Key fields:
+
+- `id`: UUID primary key
+- `name`: identifier used when generating nginx `upstream <name> {}`
+- `protocol`: `http` | `tcp` | `udp` — determines how nginx will use the pool
+- `algorithm`: load balancing strategy (`round_robin`, `least_conn`, `ip_hash`)
+- `sticky_session`: whether to enable sticky behavior when supported
+- `health_check`: optional JSON describing health probes
+
+nginx mapping (HTTP):
+
+```nginx
+upstream <name> {
+    server 10.0.0.5:8080 weight=2;
+    server 10.0.0.6:8080 backup;
+    # optional LB settings generated from `algorithm` and `sticky_session`
+}
+
+server {
+    listen 80;
+    server_name example.com;
+
+    location / {
+        proxy_pass http://<name>;
+    }
+}
+```
+
+nginx mapping (stream):
+
+```nginx
+stream {
+  upstream <name> {
+    server 10.0.0.5:3306;
+    server 10.0.0.6:3306 backup;
+  }
+
+  server {
+    listen 3306;
+    proxy_pass <name>;
+  }
+}
+```
+
+Notes: `upstream.protocol` selects which block and directive forms to generate;
+
+---
+
+## `upstream_target`
+
+Purpose: One row per backend server in an `upstream` pool.
+
+Key fields:
+
+- `upstream_id`: FK to `upstream`
+- `target_host`, `target_port`
+- `weight`, `is_backup`, `enabled`
+
+nginx mapping: each row becomes a `server` line in the generated `upstream` block (weights and backup flags applied). Disabled targets are omitted.
+
+Example generated line:
+
+```nginx
+server 10.0.0.5:8080 weight=3;
+server 10.0.0.6:8080 backup;
+```
+
+---
+
+## `proxy_host`
+
+Purpose: Represents an HTTP(S) host (a top-level `server` block in nginx `http` context).
+
+Key fields:
+
+- `domain`: `server_name` value (may be a wildcard)
+- `listen_port`: port to listen on (80/443)
+- `scheme`: http|https (informs UI; TLS handled elsewhere)
+- `forward_host/forward_port` or `default_upstream_id`: host-level forwarding fallback
+- `preserve_host_header`: whether to forward original `Host` header
+- `enable_websocket`: toggles websocket header handling
+- `meta`: JSON for optional host-level settings (timeouts, client_max_body_size, custom snippets)
+
+nginx mapping (host-level default):
+
+```nginx
+server {
+  listen <listen_port>;
+  server_name <domain>;
+
+  # host-level fallback if no matching location
+  location / {
+    proxy_pass http://<default_upstream_name>;
+  }
+}
+```
+
+If `forward_host`/`forward_port` is set instead of `default_upstream_id`, generate `proxy_pass http://forward_host:forward_port;`.
+
+`meta` entries are injected into the `server` block (careful: snippets can break reloads).
+
+---
+
+## `location`
+
+Purpose: Path-level routing (`location` blocks inside a `server`). More specific than `proxy_host` default.
+
+Key fields:
+
+- `host_id`: FK to `proxy_host`
+- `path`: `location` match (e.g., `/api`, `~^/assets/`)
+- `match_type`: `prefix` | `exact` | `regex`
+- `upstream_id` or `proxy_pass_host`/`proxy_pass_port`
+- `allowed_methods`: optional method whitelist
+- `custom_config`: raw nginx snippet inserted inside the `location`
+
+nginx mapping:
+
+```nginx
+location /api {
+  proxy_pass http://api_upstream;
+  # optional custom_config injected here
+}
+```
+
+Ordering and match type produce correct nginx `location` selection semantics; `order` field can break ties for equal specificity.
+
+---
+
+## `stream_service`
+
+Purpose: A TCP/UDP service in nginx `stream` context — corresponds to a `server` block inside `stream {}`.
+
+Key fields:
+
+- `listen_host`, `listen_port`
+- `protocol`: `tcp` | `udp`
+- `mode`: `direct` | `upstream` (direct forwards to `forward_host:forward_port`, `upstream` uses `upstream_id` pool)
+- `preserved_client_ip`: whether to enable proxy_protocol or other client-ip forwarding
+- `meta`: JSON for advanced stream options (ssl_preread, proxy_timeout, buffer sizes)
+
+nginx mapping (stream):
+
+```nginx
+stream {
+  upstream <name> {
+    server 10.0.0.5:3306;
+  }
+
+  server {
+    listen 3306;
+    proxy_pass <name>; # or proxy_pass 10.0.0.10:3306 for direct
+  }
+}
+```
+
+Notes: Stream services bypass HTTP processing. Use `meta` for `proxy_protocol` and `ssl_preread` toggles.
+
+---
+
+## `access_list` and `access_list_entry`
+
+Purpose: Nameable allow/deny lists for IP/CIDR or other entry types that can be applied to hosts/locations/stream services.
+
+Key fields (access_list): `id`, `name`, `description`.
+Key fields (entry): `access_list_id`, `entry_type` (e.g., `allow`, `deny`, `note`), `value` (IP or CIDR), `comment`.
+
+nginx mapping (HTTP example):
+
+```nginx
+location /admin {
+  allow 10.0.0.0/24;
+  deny all;
+  proxy_pass http://admin_upstream;
+}
+```
+
+nginx mapping (stream example):
+
+```nginx
+server {
+  listen 3306;
+  allow 10.0.0.0/24;
+  deny all;
+  proxy_pass backend_pool;
+}
+```

public/migration/src/lib.rs

@@ -13,6 +13,8 @@ impl MigratorTrait for Migrator {
             Box::new(m20251011_000001_create_config_table::Migration),
             Box::new(m20251011_000002_create_user_table::Migration),
             Box::new(m20251011_000003_create_user_identity_table::Migration),
+            Box::new(m20251223_000004_create_upstream_table::Migration),
+            Box::new(m20251223_000005_create_upstream_target_table::Migration),
         ]
     }
 }

public/migration/src/migrations.rs

@@ -1,3 +1,5 @@
 pub mod m20251011_000001_create_config_table;
 pub mod m20251011_000002_create_user_table;
 pub mod m20251011_000003_create_user_identity_table;
+pub mod m20251223_000004_create_upstream_table;
+pub mod m20251223_000005_create_upstream_target_table;

public/migration/src/migrations/m20251223_000004_create_upstream_table.rs

@@ -0,0 +1,66 @@
+use sea_orm_migration::{prelude::*, schema::*};
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[forbid(dead_code)]
+#[derive(DeriveIden)]
+pub enum Upstream {
+    Table,
+    Id,
+    Name,
+    Protocol,
+    Algorithm,
+    StickySession,
+    CreatedBy,
+    CreatedAt,
+    UpdatedAt,
+}
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_table(
+                Table::create()
+                    .table(Upstream::Table)
+                    .if_not_exists()
+                    .col(pk_uuid(Upstream::Id))
+                    .col(ColumnDef::new(Upstream::Name).string().not_null())
+                    .col(ColumnDef::new(Upstream::Protocol).string().not_null())
+                    .col(
+                        ColumnDef::new(Upstream::Algorithm)
+                            .string()
+                            .default("round_robin")
+                            .not_null(),
+                    )
+                    .col(
+                        ColumnDef::new(Upstream::StickySession)
+                            .boolean()
+                            .default(false)
+                            .not_null(),
+                    )
+                    .col(ColumnDef::new(Upstream::CreatedBy).uuid().null())
+                    .col(
+                        ColumnDef::new(Upstream::CreatedAt)
+                            .timestamp()
+                            .default(SimpleExpr::Keyword(Keyword::CurrentTimestamp))
+                            .not_null(),
+                    )
+                    .col(
+                        ColumnDef::new(Upstream::UpdatedAt)
+                            .timestamp()
+                            .default(SimpleExpr::Keyword(Keyword::CurrentTimestamp))
+                            .not_null(),
+                    )
+                    .to_owned(),
+            )
+            .await
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_table(Table::drop().table(Upstream::Table).to_owned())
+            .await
+    }
+}

public/migration/src/migrations/m20251223_000005_create_upstream_target_table.rs

@@ -0,0 +1,92 @@
+use sea_orm_migration::{prelude::*, schema::*};
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[forbid(dead_code)]
+#[derive(DeriveIden)]
+pub enum UpstreamTarget {
+    Table,
+    Id,
+    UpstreamId,
+    TargetHost,
+    TargetPort,
+    Weight,
+    IsBackup,
+    Enabled,
+    CreatedAt,
+    UpdatedAt,
+}
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_table(
+                Table::create()
+                    .table(UpstreamTarget::Table)
+                    .if_not_exists()
+                    .col(pk_uuid(UpstreamTarget::Id))
+                    .col(ColumnDef::new(UpstreamTarget::UpstreamId).uuid().not_null())
+                    .foreign_key(
+                        ForeignKey::create()
+                            .name("fk-upstream-target-upstream-id")
+                            .from(UpstreamTarget::Table, UpstreamTarget::UpstreamId)
+                            .to(
+                                super::m20251223_000004_create_upstream_table::Upstream::Table,
+                                super::m20251223_000004_create_upstream_table::Upstream::Id,
+                            )
+                            .on_delete(ForeignKeyAction::Cascade)
+                            .on_update(ForeignKeyAction::Cascade),
+                    )
+                    .col(
+                        ColumnDef::new(UpstreamTarget::TargetHost)
+                            .string()
+                            .not_null(),
+                    )
+                    .col(
+                        ColumnDef::new(UpstreamTarget::TargetPort)
+                            .integer()
+                            .not_null(),
+                    )
+                    .col(
+                        ColumnDef::new(UpstreamTarget::Weight)
+                            .integer()
+                            .default(1)
+                            .not_null(),
+                    )
+                    .col(
+                        ColumnDef::new(UpstreamTarget::IsBackup)
+                            .boolean()
+                            .default(false)
+                            .not_null(),
+                    )
+                    .col(
+                        ColumnDef::new(UpstreamTarget::Enabled)
+                            .boolean()
+                            .default(true)
+                            .not_null(),
+                    )
+                    .col(
+                        ColumnDef::new(UpstreamTarget::CreatedAt)
+                            .timestamp()
+                            .default(SimpleExpr::Keyword(Keyword::CurrentTimestamp))
+                            .not_null(),
+                    )
+                    .col(
+                        ColumnDef::new(UpstreamTarget::UpdatedAt)
+                            .timestamp()
+                            .default(SimpleExpr::Keyword(Keyword::CurrentTimestamp))
+                            .not_null(),
+                    )
+                    .to_owned(),
+            )
+            .await
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_table(Table::drop().table(UpstreamTarget::Table).to_owned())
+            .await
+    }
+}