Add project structure and roadmap documentation

- Created `project-structure.md` to outline the directory layout, crate dependencies, design principles, module guidelines, and naming conventions for the NxMesh codebase. - Introduced `roadmap.md` detailing the development phases, milestones, tasks, deliverables, and resource requirements for the NxMesh project, spanning from foundational setup to enterprise features.
2026-03-03 04:13:31 +00:00
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+# NxMesh Project Roadmap
+
+## Overview
+
+This document outlines the development phases and milestones for NxMesh. The project is divided into four major phases, each building upon the previous one.
+
+---
+
+## Phase 1: Foundation (Months 1-3)
+
+**Goal**: Build a working MVP with basic master-agent communication and nginx configuration management.
+
+### Milestone 1.1: Project Setup and Core Infrastructure
+**Target**: Week 2
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | Set up Rust workspace structure (master, agent, shared) | 🔲 |
+| [ ] | Configure CI/CD pipeline (GitHub Actions) | 🔲 |
+| [ ] | Set up database schema with SeaORM migrations | 🔲 |
+| [ ] | Create development environment (devcontainer) | 🔲 |
+| [ ] | Set up testing framework (unit, integration) | 🔲 |
+
+**Deliverables**:
+- Working development environment
+- Database schema for organizations, workspaces, agents
+- CI pipeline with linting and testing
+
+---
+
+### Milestone 1.2: Master - Core API
+**Target**: Week 5
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | Implement Axum-based REST API server | 🔲 |
+| [ ] | JWT authentication middleware | 🔲 |
+| [ ] | CRUD endpoints for Organizations | 🔲 |
+| [ ] | CRUD endpoints for Workspaces | 🔲 |
+| [ ] | CRUD endpoints for Agents | 🔲 |
+| [ ] | PostgreSQL persistence layer | 🔲 |
+
+**Deliverables**:
+- REST API for basic resource management
+- JWT authentication working
+- API documentation (OpenAPI)
+
+---
+
+### Milestone 1.3: Master - Agent Communication
+**Target**: Week 7
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | gRPC server implementation (Tonic) | 🔲 |
+| [ ] | Bidirectional streaming protocol | 🔲 |
+| [ ] | Agent registration flow | 🔲 |
+| [ ] | Token-based authentication for agents | 🔲 |
+| [ ] | Agent heartbeat/health monitoring | 🔲 |
+| [ ] | WebSocket fallback for events | 🔲 |
+
+**Deliverables**:
+- Master can accept agent connections
+- Agent registration and authentication works
+- Health status tracking
+
+---
+
+### Milestone 1.4: Agent - Core Functionality
+**Target**: Week 9
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | Agent CLI and configuration | 🔲 |
+| [ ] | gRPC client for master communication | 🔲 |
+| [ ] | Automatic reconnection with backoff | 🔲 |
+| [ ] | Nginx process management (Docker sidecar PID sharing) | 🔲 |
+| [ ] | Health check reporting | 🔲 |
+| [ ] | Local config caching | 🔲 |
+
+**Deliverables**:
+- Agent binary that connects to master
+- Nginx lifecycle management (Docker sidecar mode)
+- Health reporting
+
+---
+
+### Milestone 1.5: Configuration Management
+**Target**: Week 11
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | VirtualHost CRUD API | 🔲 |
+| [ ] | Upstream CRUD API | 🔲 |
+| [ ] | Handlebars template engine integration | 🔲 |
+| [ ] | Config rendering on agent | 🔲 |
+| [ ] | Nginx config validation (`nginx -t`) | 🔲 |
+| [ ] | Graceful reload on config change | 🔲 |
+
+**Deliverables**:
+- End-to-end config push: Master → Agent → Nginx
+- Basic virtual host and upstream management
+- Template-based nginx config generation
+
+---
+
+### Milestone 1.6: Web Admin Console - Foundation
+**Target**: Week 13
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | React + Vite project setup | 🔲 |
+| [ ] | Authentication UI (login/logout) | 🔲 |
+| [ ] | Dashboard layout and navigation | 🔲 |
+| [ ] | Agent list and detail views | 🔲 |
+| [ ] | Basic virtual host form | 🔲 |
+| [ ] | WebSocket integration for real-time updates | 🔲 |
+
+**Deliverables**:
+- Functional Web UI
+- Agent management via UI
+- Basic configuration editing
+
+---
+
+### Phase 1 Completion Criteria
+- [ ] Master and Agent communicate via gRPC
+- [ ] Nginx configs can be pushed from Master to Agent
+- [ ] Web UI for basic management
+- [ ] Docker sidecar deployment working
+- [ ] Documentation complete
+
+**Estimated Effort**: 3 months
+**Team Size**: 2-3 engineers
+
+---
+
+## Phase 2: Resilience and Observability (Months 4-5)
+
+**Goal**: Make the system production-ready with HA, monitoring, and robust failure handling.
+
+### Milestone 2.1: High Availability - Master Clustering
+**Target**: Week 15
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | Raft consensus integration (raft-rs) | 🔲 |
+| [ ] | Leader election | 🔲 |
+| [ ] | State replication across masters | 🔲 |
+| [ ] | Agent connection failover | 🔲 |
+| [ ] | Cluster health monitoring | 🔲 |
+
+**Deliverables**:
+- Multiple master instances can form a cluster
+- Automatic failover on master failure
+- No single point of failure
+
+---
+
+### Milestone 2.2: Certificate Management
+**Target**: Week 17
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | ACME client integration (acme-rs) | 🔲 |
+| [ ] | Let's Encrypt HTTP-01 challenge | 🔲 |
+| [ ] | Certificate storage (encrypted) | 🔲 |
+| [ ] | Automatic renewal | 🔲 |
+| [ ] | Certificate distribution to agents | 🔲 |
+| [ ] | Expiration monitoring and alerts | 🔲 |
+
+**Deliverables**:
+- Automatic SSL certificate provisioning
+- Certificate renewal before expiry
+- UI for certificate management
+
+---
+
+### Milestone 2.3: Observability Stack
+**Target**: Week 19
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | OpenTelemetry integration | 🔲 |
+| [ ] | Structured logging (tracing) | 🔲 |
+| [ ] | Prometheus metrics endpoint (agent) | 🔲 |
+| [ ] | Custom metrics collection | 🔲 |
+| [ ] | Health check dashboard | 🔲 |
+| [ ] | Alert configuration | 🔲 |
+
+**Deliverables**:
+- Metrics visible in Prometheus
+- Distributed traces for config pushes
+- Health dashboard in Web UI
+
+---
+
+### Milestone 2.4: Enhanced Failure Handling
+**Target**: Week 21
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | Configuration drift detection | 🔲 |
+| [ ] | Auto-healing (config sync) | 🔲 |
+| [ ] | Circuit breaker for master connection | 🔲 |
+| [ ] | Nginx crash detection and restart | 🔲 |
+| [ ] | Config rollback on validation failure | 🔲 |
+| [ ] | Bulk operations and queue management | 🔲 |
+
+**Deliverables**:
+- System self-heals from common failures
+- Config drift automatically corrected
+- Robust reconnection logic
+
+---
+
+### Phase 2 Completion Criteria
+- [ ] Master clustering with Raft
+- [ ] Automatic SSL certificates
+- [ ] Full observability (metrics, logs, traces)
+- [ ] Production-grade failure handling
+- [ ] Performance benchmarks
+
+**Estimated Effort**: 2 months
+**Team Size**: 2-3 engineers
+
+---
+
+## Phase 3: Advanced Traffic Management (Months 6-7)
+
+**Goal**: Add enterprise-grade traffic management features.
+
+### Milestone 3.1: Advanced Load Balancing
+**Target**: Week 23
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | Multiple load balancing algorithms | 🔲 |
+| [ ] | Health checks for upstream servers | 🔲 |
+| [ ] | Circuit breaker for upstreams | 🔲 |
+| [ ] | Retry policies | 🔲 |
+| [ ] | Connection pooling | 🔲 |
+| [ ] | Upstream status dashboard | 🔲 |
+
+**Deliverables**:
+- Advanced upstream configuration
+- Health check visualization
+- Circuit breaker metrics
+
+---
+
+### Milestone 3.2: Rate Limiting and WAF
+**Target**: Week 25
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | Rate limiting rules (IP, user, global) | 🔲 |
+| [ ] | Rate limiting zones | 🔲 |
+| [ ] | Basic WAF rules (ModSecurity integration) | 🔲 |
+| [ ] | IP allowlist/blocklist | 🔲 |
+| [ ] | Geo-blocking | 🔲 |
+| [ ] | Rate limit analytics | 🔲 |
+
+**Deliverables**:
+- Configurable rate limiting
+- Basic WAF protection
+- Security event dashboard
+
+---
+
+### Milestone 3.3: Traffic Routing and Canary
+**Target**: Week 27
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | Header-based routing | 🔲 |
+| [ ] | Weight-based traffic splitting | 🔲 |
+| [ ] | Canary deployment support | 🔲 |
+| [ ] | A/B testing configuration | 🔲 |
+| [ ] | Blue-green deployment | 🔲 |
+| [ ] | Traffic analytics | 🔲 |
+
+**Deliverables**:
+- Advanced traffic routing
+- Canary deployment UI
+- Traffic split visualization
+
+---
+
+### Milestone 3.4: Access Log Aggregation
+**Target**: Week 29
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | Nginx access log parsing | 🔲 |
+| [ ] | Log streaming to master | 🔲 |
+| [ ] | Log storage and indexing | 🔲 |
+| [ ] | Log query interface | 🔲 |
+| [ ] | Real-time log tailing | 🔲 |
+| [ ] | Log-based alerting | 🔲 |
+
+**Deliverables**:
+- Centralized access logs
+- Log search and filtering
+- Log-based metrics
+
+---
+
+### Phase 3 Completion Criteria
+- [ ] Advanced load balancing and health checks
+- [ ] Rate limiting and basic WAF
+- [ ] Canary and A/B testing
+- [ ] Access log aggregation
+- [ ] Traffic analytics dashboard
+
+**Estimated Effort**: 2 months
+**Team Size**: 2-3 engineers
+
+---
+
+## Phase 4: Enterprise Features (Months 8-10)
+
+**Goal**: Enterprise readiness with multi-tenancy, RBAC, and advanced integrations.
+
+### Milestone 4.1: Multi-tenancy and RBAC
+**Target**: Week 31
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | Organization isolation | 🔲 |
+| [ ] | Workspace-scoped resources | 🔲 |
+| [ ] | Role-based access control | 🔲 |
+| [ ] | User management API | 🔲 |
+| [ ] | API key management | 🔲 |
+| [ ] | Audit logging | 🔲 |
+
+**Deliverables**:
+- Full multi-tenancy
+- Granular permissions
+- Audit trail
+
+---
+
+### Milestone 4.2: Kubernetes Integration
+**Target**: Week 33
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | Kubernetes operator | 🔲 |
+| [ ] | CRD definitions | 🔲 |
+| [ ] | Helm chart | 🔲 |
+| [ ] | Service discovery integration | 🔲 |
+| [ ] | Ingress controller mode | 🔲 |
+| [ ] | K8s-native agent deployment | 🔲 |
+
+**Deliverables**:
+- Kubernetes operator
+- Helm chart for easy deployment
+- Ingress controller functionality
+
+---
+
+### Milestone 4.3: External Integrations
+**Target**: Week 35
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | Terraform provider | 🔲 |
+| [ ] | GitOps integration (Git sync) | 🔲 |
+| [ ] | Webhook support | 🔲 |
+| [ ] | Slack/Discord notifications | 🔲 |
+| [ ] | PagerDuty/Opsgenie integration | 🔲 |
+| [ ] | DNS provider integration (Route53, Cloudflare) | 🔲 |
+
+**Deliverables**:
+- Infrastructure as Code support
+- GitOps workflows
+- Notification channels
+
+---
+
+### Milestone 4.4: Performance and Scale
+**Target**: Week 37
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | Connection pooling optimization | 🔲 |
+| [ ] | Config caching improvements | 🔲 |
+| [ ] | Database query optimization | 🔲 |
+| [ ] | Horizontal scaling tests | 🔲 |
+| [ ] | Load testing (10k+ agents) | 🔲 |
+| [ ] | Performance tuning documentation | 🔲 |
+
+**Deliverables**:
+- Performance benchmarks
+- Scaling guidelines
+- Optimization recommendations
+
+---
+
+### Milestone 4.5: Enterprise Security
+**Target**: Week 39
+
+| Task | Description | Status |
+|------|-------------|--------|
+| [ ] | mTLS for all communications | 🔲 |
+| [ ] | Secret encryption at rest | 🔲 |
+| [ ] | HSM integration | 🔲 |
+| [ ] | SSO/SAML integration | 🔲 |
+| [ ] | Security scanning (SAST/DAST) | 🔲 |
+| [ ] | Compliance documentation (SOC2) | 🔲 |
+
+**Deliverables**:
+- Enterprise security features
+- Compliance documentation
+- Security audit
+
+---
+
+### Phase 4 Completion Criteria
+- [ ] Full RBAC and multi-tenancy
+- [ ] Kubernetes operator
+- [ ] External integrations (Terraform, GitOps)
+- [ ] Proven scalability (10k+ agents)
+- [ ] Enterprise security compliance
+
+**Estimated Effort**: 3 months
+**Team Size**: 3-4 engineers
+
+---
+
+## Timeline Summary
+
+```
+Month 1-3:   ████████████████████████████████████████ Phase 1: Foundation
+Month 4-5:   ████████████████████                    Phase 2: Resilience
+Month 6-7:   ████████████████████                    Phase 3: Advanced
+Month 8-10:  ██████████████████████████              Phase 4: Enterprise
+
+Week:        1  2  3  4  5  6  7  8  9  10 11 12 13 14 15 16 17 18 19 20
+             |--M1--|--M2--|--M3--|--M4--|--M5--|--M6--|
+
+Week:        21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
+             |--M7--|--M8--|--M9--|--M10-|--M11-|--M12-|--M13-|--M14-|
+```
+
+---
+
+## Resource Requirements
+
+### Phase 1
+- **Backend Engineers**: 2
+- **Frontend Engineer**: 1
+- **Total Person-Months**: 9
+
+### Phase 2
+- **Backend Engineers**: 2
+- **Frontend Engineer**: 1 (part-time)
+- **DevOps Engineer**: 1 (part-time)
+- **Total Person-Months**: 7
+
+### Phase 3
+- **Backend Engineers**: 2
+- **Frontend Engineer**: 1
+- **Total Person-Months**: 6
+
+### Phase 4
+- **Backend Engineers**: 2
+- **Frontend Engineer**: 1
+- **DevOps Engineer**: 1
+- **Security Engineer**: 1 (part-time)
+- **Total Person-Months**: 10
+
+**Total Project**: ~32 person-months
+
+---
+
+## Risk Assessment
+
+| Risk | Probability | Impact | Mitigation |
+|------|-------------|--------|------------|
+| Raft complexity delays HA | Medium | High | Start with single master, add HA later |
+| gRPC performance issues | Low | Medium | Implement WebSocket fallback early |
+| Nginx reload edge cases | Medium | High | Extensive testing, rollback capability |
+| Team scaling challenges | Medium | Medium | Document architecture, modular design |
+| Integration complexity | Medium | Medium | Clear APIs, contract testing |