Docker Ci Cd

# GitHub Actions Docker Workflow
# Builds, tests, scans, and pushes Docker images

name: Docker Build and Push

on:
  push:
    branches: [main, develop]
    tags: ['v*']
  pull_request:
    branches: [main]

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      security-events: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to Container Registry
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=sha

      - name: Build and push
        uses: docker/build-push-action@v5
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

      - name: Run Trivy vulnerability scanner
        uses: aquasecurity/trivy-action@master
        with:
          image-ref: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }}
          format: 'sarif'
          output: 'trivy-results.sarif'

      - name: Upload Trivy scan results
        uses: github/codeql-action/upload-sarif@v2
        if: always()
        with:
          sarif_file: 'trivy-results.sarif'

  test:
    runs-on: ubuntu-latest
    needs: build
    if: github.event_name != 'pull_request'

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Run container tests
        run: |
          docker run --rm ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }} \
            /bin/sh -c "echo 'Container health check passed'"

  deploy:
    runs-on: ubuntu-latest
    needs: [build, test]
    if: github.ref == 'refs/heads/main'
    environment: production

    steps:
      - name: Deploy to production
        run: |
          echo "Deploying ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }}"
          # Add your deployment commands here


# Docker CI/CD Integration Guide

## GitHub Actions

### Basic Build and Push
```yaml
- name: Build and push
  uses: docker/build-push-action@v5
  with:
    push: true
    tags: user/app:latest
```

### Multi-Platform Build
```yaml
- uses: docker/setup-qemu-action@v3
- uses: docker/setup-buildx-action@v3
- uses: docker/build-push-action@v5
  with:
    platforms: linux/amd64,linux/arm64
```

### Cache Configuration
```yaml
cache-from: type=gha
cache-to: type=gha,mode=max
```

## GitLab CI

### Basic Pipeline
```yaml
build:
  image: docker:24
  services:
    - docker:dind
  script:
    - docker build -t $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA .
    - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
```

## Security Scanning

### Trivy Integration
```yaml
- name: Trivy scan
  uses: aquasecurity/trivy-action@master
  with:
    image-ref: myapp:latest
    format: sarif
```

### Snyk Integration
```yaml
- name: Snyk Container
  uses: snyk/actions/docker@master
  with:
    image: myapp:latest
```

## Best Practices

1. **Use semantic versioning** for image tags
2. **Scan all images** before pushing
3. **Cache layers** for faster builds
4. **Multi-arch support** for ARM compatibility
5. **Sign images** for supply chain security
6. *