> ## Documentation Index
> Fetch the complete documentation index at: https://ihub.learnille.com/llms.txt
> Use this file to discover all available pages before exploring further.

# CI/CD Pipeline Overview

> Migrated from the previous Learnille internal documentation hub

> The deployment examples on this page are legacy and are not the current production implementation. Production server deployment is handled through Dokploy; verify frontend hosting and CI automation separately before using these examples.

## Overview

The Learnille platform uses a comprehensive CI/CD pipeline to ensure reliable, automated delivery of software changes from development to production.

## Pipeline Architecture

```
┌─────────────┐    ┌─────────────┐    ┌─────────────┐    ┌─────────────┐
│  Developer  │───▶│    GitHub   │───▶│   GitHub    │───▶│  Staging    │
│   Commit    │    │   Actions   │    │   Actions   │    │ Environment │
└─────────────┘    └─────────────┘    └─────────────┘    └─────────────┘
         │               │                     │               │
         ▼               ▼                     ▼               ▼
┌─────────────┐    ┌─────────────┐    ┌─────────────┐    ┌─────────────┐
│   Testing   │    │   Build     │    │  Security   │    │ Integration │
│   Stage     │    │   Stage     │    │   Scan      │    │   Tests     │
└─────────────┘    └─────────────┘    └─────────────┘    └─────────────┘
                                                                 │
                                                                 ▼
┌─────────────┐    ┌─────────────┐    ┌─────────────┐    ┌─────────────┐
│  Production │◀───│   Manual    │◀───│ Performance│◀───│   Approval  │
│ Environment │    │  Approval   │    │   Tests     │    │             │
└─────────────┘    └─────────────┘    └─────────────┘    └─────────────┘
```

## Pipeline Stages

### 1. Source Control

* **Trigger**: Push to main/develop branches, pull requests
* **Actions**:
  * Code checkout
  * Branch validation
  * Commit message validation
  * Pre-commit hooks execution

### 2. Testing Stage

* **Unit Tests**: Jest for frontend, pytest for backend
* **Integration Tests**: API endpoint testing
* **E2E Tests**: Playwright for critical user journeys
* **Coverage**: Minimum 80% code coverage required

### 3. Build Stage

* **Frontend Build**: TypeScript compilation, asset optimization
* **Backend Build**: Docker image creation
* **Security Scanning**: Snyk for dependency vulnerabilities
* **Artifact Storage**: Docker images pushed to registry

### 4. Staging Deployment

* **Environment**: Mirrors production setup
* **Database**: Isolated staging database
* **Data**: Anonymized production data
* **Monitoring**: Full monitoring stack enabled

### 5. Quality Gates

* **Performance Tests**: Load testing with k6
* **Security Tests**: Penetration testing
* **Compliance Checks**: GDPR, accessibility compliance
* **Manual Review**: QA team approval required

### 6. Production Deployment

* **Strategy**: Blue-green deployment
* **Rollback**: Automated rollback on failure
* **Monitoring**: Real-time health checks
* **Notification**: Team notifications on deployment status

## Tools and Technologies

### CI/CD Platform

* **GitHub Actions**: Primary CI/CD platform
* **Workflows**: YAML-based pipeline definitions
* **Self-hosted Runners**: For performance-intensive tasks

### Containerization

* **Docker**: Application containerization
* **Docker Compose**: Local development environment
* **Kubernetes**: Production container orchestration

### Testing Tools

* **Jest**: JavaScript/TypeScript unit testing
* **Playwright**: End-to-end testing
* **k6**: Performance and load testing
* **Cypress**: Component testing

### Security Tools

* **Snyk**: Dependency vulnerability scanning
* **SonarQube**: Code quality analysis
* **OWASP ZAP**: Dynamic security testing

### Monitoring Tools

* **Prometheus**: Metrics collection
* **Grafana**: Dashboard visualization
* **ELK Stack**: Log aggregation and analysis
* **New Relic**: Application performance monitoring

## Environment Configuration

### Development Environment

```yaml theme={null}
# .github/workflows/dev.yml
name: Development CI
on:
  push:
    branches: [ develop ]
jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Setup Node.js
        uses: actions/setup-node@v3
        with:
          node-version: '18'
      - name: Install dependencies
        run: npm ci
      - name: Run tests
        run: npm test
      - name: Build application
        run: npm run build
```

### Production Environment

```yaml theme={null}
# .github/workflows/prod.yml
name: Production CD
on:
  push:
    branches: [ main ]
jobs:
  deploy:
    runs-on: ubuntu-latest
    environment: production
    steps:
      - uses: actions/checkout@v3
      - name: Deploy to Self-Hosted Server via SSH
        uses: appleboy/ssh-action@master
        with:
          host: ${{ secrets.SERVER_HOST }}
          username: ${{ secrets.SERVER_USER }}
          key: ${{ secrets.SSH_PRIVATE_KEY }}
          script: |
            cd /opt/learnille
            git pull origin main
            cd server && npm install && npm run build
            pm2 reload learnille-api --update-env
```

## Deployment Strategies

### Blue-Green Deployment

* Two identical production environments
* Traffic switched between blue and green
* Zero-downtime deployments
* Instant rollback capability

### Canary Deployment

* Gradual traffic shift to new version
* Monitor metrics during rollout
* Automatic rollback on threshold breach
* A/B testing capabilities

### Feature Flags

* Deploy code without exposing features
* Gradual feature rollout
* Emergency feature disabling
* A/B testing support

## Quality Gates

### Automated Gates

* **Test Coverage**: > 80%
* **Security Scan**: No critical vulnerabilities
* **Performance**: \< 2s response time
* **Code Quality**: Grade A in SonarQube

### Manual Gates

* **Code Review**: Required for all changes
* **QA Approval**: Manual testing sign-off
* **Security Review**: For sensitive changes
* **Product Approval**: Feature validation

## Monitoring and Alerting

### Pipeline Metrics

* Build success rate
* Deployment frequency
* Mean time to recovery
* Change failure rate

### Application Metrics

* Response time
* Error rate
* Throughput
* Resource utilization

### Alerting Rules

* Pipeline failures
* Deployment timeouts
* Performance degradation
* Security incidents

## Rollback Procedures

### Automated Rollback

* Health check failures trigger rollback
* Database migration failures
* Application startup failures
* Performance threshold breaches

### Manual Rollback

* Emergency rollback button in dashboard
* Version selection for rollback target
* Database backup restoration
* Cache invalidation

## Security Considerations

### Pipeline Security

* Secret management with GitHub Secrets
* Dependency scanning
* Container image scanning
* Infrastructure as Code security

### Access Control

* Branch protection rules
* Required reviews for production
* Environment-specific approvals
* Audit logging

## Performance Optimization

### Build Optimization

* Dependency caching
* Parallel job execution
* Incremental builds
* Artifact reuse

### Deployment Optimization

* Image layer caching
* Rolling updates
* Health check optimization
* Resource optimization

## Disaster Recovery

### Backup Strategy

* Database backups every 6 hours
* Configuration backups daily
* Artifact storage with versioning
* Multi-region replication

### Recovery Procedures

* Automated failover to backup region
* Database restoration from backups
* Application redeployment
* Data consistency verification

## Continuous Improvement

### Metrics Tracking

* Deployment frequency
* Lead time for changes
* Change failure rate
* Mean time to recovery

### Process Optimization

* Regular pipeline reviews
* Tool upgrades
* Process documentation updates
* Team training and knowledge sharing


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