# Remediation Orchestrator (Alert Remediation Service)

**Version**: v1.1
**Status**: ✅ Design Complete (100% - includes V1.0 approval notification integration)
**Health/Ready Port**: 8080 (`/health`, `/ready` - no auth required)
**Metrics Port**: 9090 (`/metrics` - with auth filter)
**CRD**: RemediationRequest
**Controller**: RemediationRequestReconciler
**Priority**: **P0 - CRITICAL** (Central Orchestrator)
**Effort**: 2 weeks

---

## 🗂️ Documentation Index

| Document | Purpose | Lines | Status |
|----------|---------|-------|--------|
| **[Overview](./overview.md)** | Service purpose, scope, architecture, key decisions | ~380 | ✅ Complete |
| **[CRD Schema](./crd-schema.md)** | RemediationRequest CRD types, validation, examples | ~748 | ✅ Complete |
| **[Controller Implementation](./controller-implementation.md)** | Reconciler logic, phase handling, owner references | ~1,516 | ✅ Complete |
| **[Reconciliation Phases](./reconciliation-phases.md)** | Phase transitions, timeouts, coordination patterns | ~499 | ✅ Complete |
| **[Data Handling Architecture](./data-handling-architecture.md)** | Targeting Data Pattern (unique to central controller) | ~320 | ✅ Complete |
| **[Finalizers & Lifecycle](./finalizers-lifecycle.md)** | Cleanup patterns, CRD lifecycle management, monitoring | ~785 | ✅ Complete |
| **[Testing Strategy](./testing-strategy.md)** | Unit/Integration/E2E tests, mock patterns, anti-patterns | ~1,611 | ✅ **Complete (BEST IN CLASS)** |
| **[Security Configuration](./security-configuration.md)** | RBAC, network policies, secret handling, security context | ~596 | ✅ Complete |
| **[Observability & Logging](./observability-logging.md)** | Structured logging, distributed tracing, correlation IDs | ~928 | ✅ Complete |
| **[Metrics & SLOs](./metrics-slos.md)** | Prometheus metrics, Grafana dashboards, alert rules | ~406 | ✅ Complete |
| **[Database Integration](./database-integration.md)** | Audit storage, PostgreSQL schema, vector DB | ~586 | ✅ Complete |
| **[Integration Points](./integration-points.md)** | Upstream/downstream services, external dependencies | ~724 | ✅ Complete |
| **[Migration & Current State](./migration-current-state.md)** | Existing code, migration path, reusability analysis | ~617 | ✅ Complete |
| **[Implementation Checklist](./implementation-checklist.md)** | APDC-TDD phases, tasks, validation steps | ~159 | ✅ Complete |

**Total**: ~9,875 lines across 14 core specification documents
**Status**: ✅ **100% Complete** - All specification documents fully written

---

## 📁 File Organization

```
05-remediationorchestrator/
├── 📄 README.md (you are here)              - Service index & navigation
├── 📘 overview.md                           - High-level architecture ✅ (380 lines)
├── 🔧 crd-schema.md                         - CRD type definitions ✅ (748 lines)
├── ⚙️  controller-implementation.md         - Reconciler logic ✅ (1,516 lines)
├── 🔄 reconciliation-phases.md              - Phase details & coordination ✅ (499 lines)
├── 🎯 data-handling-architecture.md         - Targeting Data Pattern (unique) ✅ (320 lines)
├── 🧹 finalizers-lifecycle.md               - Cleanup & lifecycle management ✅ (785 lines)
├── 🧪 testing-strategy.md                   - Test patterns ✅ **BEST IN CLASS (1,611 lines)**
├── 🔒 security-configuration.md             - Security patterns ✅ (596 lines)
├── 📊 observability-logging.md              - Logging & tracing ✅ (928 lines)
├── 📈 metrics-slos.md                       - Prometheus & Grafana ✅ (406 lines)
├── 💾 database-integration.md               - Audit storage & schema ✅ (586 lines)
├── 🔗 integration-points.md                 - Service coordination ✅ (724 lines)
├── 🔀 migration-current-state.md            - Existing code & migration ✅ (617 lines)
└── ✅ implementation-checklist.md           - APDC-TDD phases & tasks ✅ (159 lines)
```

**Legend**:
- **(COMMON PATTERN)** = Duplicated across all CRD services with service-specific adaptations
- ✅ = Complete documentation
- 🎯 = Central controller unique file (Targeting Data Pattern)
- **BEST IN CLASS** = Highest quality documentation across all services

---

## 🏗️ Implementation Structure

### **Binary Location**
- **Directory**: `cmd/remediationorchestrator/`
- **Entry Point**: `cmd/remediationorchestrator/main.go`
- **Build Command**: `go build -o bin/remediation-orchestrator ./cmd/remediationorchestrator`

### **Controller Location**
- **Controller**: `internal/controller/remediation/remediationrequest_controller.go`
- **CRD Types**: `api/remediation/v1alpha1/`

### **Business Logic**
- **Package**: `pkg/remediationorchestrator/`
- **Tests**: `test/unit/remediationorchestrator/`

**See Also**: [cmd/ directory structure](../../../../cmd/README.md) for complete binary organization.

---

## 🚀 Quick Start

**For New Developers**:
1. **Understand the Service**: Start with [Overview](./overview.md) (5 min read)
2. **Review the CRD**: See [CRD Schema](./crd-schema.md) (10 min read)
3. **Understand Data Pattern**: Read [Data Handling Architecture](./data-handling-architecture.md) (15 min read)

**For Implementers**:
1. **Check Migration**: Start with [Migration & Current State](./migration-current-state.md)
2. **Follow Checklist**: Use [Implementation Checklist](./implementation-checklist.md)
3. **Review Patterns**: Reference [Controller Implementation](./controller-implementation.md)

**For Reviewers**:
1. **Architecture Review**: Check [Data Handling Architecture](./data-handling-architecture.md)
2. **Security Review**: Validate [Security Configuration](./security-configuration.md)
3. **Integration Review**: Verify [Integration Points](./integration-points.md)

---

## 🔗 Related Services

| Service | Relationship | Purpose |
|---------|--------------|---------|
| **Gateway Service** | Upstream | Creates RemediationRequest CRD from alerts |
| **SignalProcessing Service** | Child (Sibling) | Enriches alert data |
| **AIAnalysis Service** | Child (Sibling) | Provides AI analysis and recommendations |
| **WorkflowExecution Service** | Child (Sibling) | Executes remediation workflow |
| **Notification Service** | External | Sends escalation notifications |
| **Data Storage Service** | External | Persists audit trail for compliance |

**Coordination Pattern**: CRD-based with centralized ownership (flat sibling hierarchy)

---

## 📋 Business Requirements Coverage

| Category | Range | Description |
|----------|-------|-------------|
| **Core** | BR-ORCH-001 to BR-ORCH-034 | Core orchestration (approval, workflow, timeout, notification, deduplication) |
| **Approval** | BR-ORCH-001, BR-ORCH-026 | Approval notification creation and orchestration |
| **Workflow** | BR-ORCH-025 | Workflow data pass-through from AIAnalysis to WorkflowExecution |
| **Timeout** | BR-ORCH-027, BR-ORCH-028 | Global and per-phase timeout management |
| **Notification** | BR-ORCH-029 to BR-ORCH-031 | Notification handling, cancellation, status tracking |
| **Deduplication** | BR-ORCH-032 to BR-ORCH-034 | WE Skipped phase handling, duplicate tracking, bulk notification |

**See**: [BUSINESS_REQUIREMENTS.md](./BUSINESS_REQUIREMENTS.md) and [BR_MAPPING.md](./BR_MAPPING.md) for detailed requirements.

---

## 🎯 Key Architectural Decisions

| Decision | Choice | Rationale | Document |
|----------|--------|-----------|----------|
| **Orchestration Model** | Central controller with flat sibling hierarchy | Decouple service controllers, single owner | [Overview](./overview.md) |
| **Data Pattern** | Targeting Data (snapshot in RemediationRequest) | Immutable context for all child CRDs | [Data Handling Architecture](./data-handling-architecture.md) |
| **State Management** | CRD-based with watch | Watch-based coordination, no HTTP polling | [Controller Implementation](./controller-implementation.md) |
| **Owner References** | RemediationRequest owns all children | Flat sibling hierarchy, cascade deletion | [Finalizers & Lifecycle](./finalizers-lifecycle.md) |
| **Lifecycle** | 24h retention after completion | Audit compliance, historical analysis | [Finalizers & Lifecycle](./finalizers-lifecycle.md) |
| **Escalation** | Notification Service integration | Human intervention for failed/rejected remediations | [Integration Points](./integration-points.md) |

---

## 🏗️ Implementation Status

### Existing Code (Per migration-current-state.md)
- **Location**: `internal/controller/remediation/remediationrequest_controller.go`
- **Status**: ~30% implemented (SignalProcessing creation functional)
- **Entry Point**: `cmd/remediationorchestrator/main.go` ✅

### What Exists (✅)
- ✅ RemediationRequest CRD schema
- ✅ RemediationRequestReconciler controller (basic)
- ✅ SignalProcessing CRD creation logic
- ✅ Field mapping from RemediationRequest to SignalProcessing
- ✅ Owner reference management
- ✅ RBAC permissions (for RR and SP)

### What's Missing (❌)
- ❌ AIAnalysis CRD creation (after SP completes)
- ❌ WorkflowExecution CRD creation (after AI completes)
- ❌ Status watching & phase progression
- ❌ RBAC for AIAnalysis and WorkflowExecution
- ❌ Error handling & retry logic
- ❌ Prometheus metrics
- ❌ Notification Service integration

### Remaining Effort (Per migration-current-state.md)
- **AIAnalysis Integration**: 1-2 days
- **WorkflowExecution Integration**: 1-2 days
- **Status & Error Handling**: 2 days
- **Observability & Metrics**: 1 day
- **Testing & Documentation**: 2 days
- **Total**: ~8-10 days remaining

---

## 🎓 Development Methodology

**Mandatory Process**: Follow APDC-Enhanced TDD workflow per [.cursor/rules/00-kubernaut-core-rules.mdc](../../../../.cursor/rules/00-kubernaut-core-rules.mdc)

**Quick Reference**:
```
ANALYSIS → PLAN → DO-RED → DO-GREEN → DO-REFACTOR → CHECK
```

**See**: [Migration & Current State](./migration-current-state.md) for complete APDC phase breakdown.

---

## 📊 Performance Targets

| Metric | Target | Business Impact |
|--------|--------|----------------|
| **Child CRD Creation** | <2s per child | Fast child service startup |
| **Status Synchronization** | <1s | Real-time phase coordination |
| **Total Orchestration** | <2min for complete flow | Rapid end-to-end remediation |
| **Watch Reactivity** | <500ms | Quick phase transitions |

**Monitoring**: See [Metrics & SLOs](./metrics-slos.md) for Prometheus metrics and Grafana dashboards.

---

## 🎯 Targeting Data Pattern (Unique to Remediation Orchestrator)

**Problem**: Child CRDs need immutable context (alert data, Kubernetes state) that doesn't change during remediation.

**Solution**: RemediationRequest stores complete data snapshot in `.spec.targetingData`.

**Benefits**:
- **Immutability**: Child CRDs always see consistent data
- **Self-Contained**: No external service calls needed
- **Audit Trail**: Complete context preserved for compliance
- **Failure Resilience**: Child retries use original data

**See**: [Data Handling Architecture](./data-handling-architecture.md) for detailed implementation.

---

## 🔍 Common Pitfalls & Best Practices

**Don't**:
- ❌ Let child CRDs own other CRDs (only RemediationRequest owns)
- ❌ Update targeting data after creation (immutable snapshot)
- ❌ Poll child status (use watch-based coordination)
- ❌ Skip escalation notification for failed remediations

**Do**:
- ✅ Use flat sibling hierarchy (RemediationRequest owns all)
- ✅ Implement Targeting Data Pattern for immutable context
- ✅ Emit Kubernetes events for visibility
- ✅ Track phase transitions for observability
- ✅ Integrate with Notification Service for escalation

**See**: Each document's "Common Pitfalls" section for detailed guidance.

---

## 📞 Support & Documentation

- **Binary Structure**: [cmd/ directory structure](../../../../cmd/README.md)
- **Build & Deploy**: [cmd/ build guide](../../../../cmd/README.md#building-services)
- **Architecture Overview**: [docs/architecture/MULTI_CRD_RECONCILIATION_ARCHITECTURE.md](../../../architecture/MULTI_CRD_RECONCILIATION_ARCHITECTURE.md)
- **CRD Design Spec**: [docs/design/CRD/01_REMEDIATION_REQUEST_CRD.md](../../../design/CRD/01_REMEDIATION_REQUEST_CRD.md)
- **Testing Strategy Rule**: [.cursor/rules/03-testing-strategy.mdc](../../../../.cursor/rules/03-testing-strategy.mdc)
- **Owner Reference Architecture**: [docs/architecture/decisions/005-owner-reference-architecture.md](../../../architecture/decisions/005-owner-reference-architecture.md)

---

## 📝 Version History

### **Version 1.2** (2025-12-03)
- ✅ **README audit**: Updated documentation index with accurate line counts
- ✅ **Confirmed all 14 specification documents are complete** (not stubs)
- ✅ **Added dedicated BR files** (BR-ORCH-001, BR-ORCH-025-034)
- ✅ **Added BR_MAPPING.md** for test coverage tracking
- ✅ **API contract alignment** with Gateway, SP, AI, WE teams
- ✅ **Added DD-RO-001** for resource lock deduplication handling
- 📊 **Total documentation**: ~9,875 lines across 14 specification documents

### **Version 1.1** (2025-10-20)
- ✅ **Added V1.0 approval notification CRD schema field** (BR-ORCH-001)
- ✅ **Added Phase 3.5: Approval Notification Triggering to reconciliation phases**
- ✅ **Added controller implementation specifications for AIAnalysis watch and NotificationRequest creation**
- ✅ **Added downstream integration documentation for Notification Service**
- ✅ **Updated from standalone implementation plan to main specification integration**
- 📊 **Design completeness**: 98% → 100%

### **Version 1.0** (2025-10-09)
- Initial Remediation Orchestrator Service specification
- CRD-based orchestration architecture
- Watch-based coordination patterns
- Testing strategy and recovery workflows

---

## 📝 Document Maintenance

**Last Updated**: 2025-12-03
**Document Structure Version**: 1.2
**Status**: ✅ **100% Complete** - All specification documents fully written

**Completion Status**:
- ✅ **Core Documentation**: 100% complete (14/14 files)
- ✅ **Testing Strategy**: **BEST IN CLASS** (1,611 lines)
- ✅ **Controller Implementation**: Exceptional (1,516 lines)
- ✅ **Security Configuration**: Complete (596 lines)
- ✅ **Database Integration**: Complete (586 lines)
- ✅ **Migration & Current State**: Complete (617 lines)
- ✅ **Reconciliation Phases**: Complete (499 lines)

**Total Documentation**: ~9,875 lines across 14 specification documents

**Common Pattern Updates**: When updating common patterns (testing, security, observability, metrics), update all 5 CRD services.

**Critical Note**: This is the **central orchestrator** - all other CRD controllers depend on this service creating their CRDs with proper owner references.

---

**Ready to implement?** Start with [Implementation Checklist](./implementation-checklist.md) 🚀

