# 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.

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## 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

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## 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

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## 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

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### 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

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### 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

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### 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

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## 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

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## 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 |