devops-expert

DevOps Expert

Expert guidance for DevOps practices, culture, CI/CD pipelines, infrastructure automation, and operational excellence.

Core Concepts

DevOps Culture

• Collaboration and communication
• Shared responsibility
• Continuous improvement
• Breaking down silos
• Blameless culture
• Measuring everything

Automation

• Infrastructure as Code (IaC)
• Configuration management
• Deployment automation
• Testing automation
• Monitoring automation
• Self-service platforms

CI/CD

• Continuous Integration
• Continuous Delivery
• Continuous Deployment
• Pipeline as Code
• Artifact management
• Release strategies

CI/CD Pipeline

# GitHub Actions Example
name: CI/CD Pipeline

on:
  push:
    branches: [main, develop]
  pull_request:
    branches: [main]

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

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3

      - name: Setup Node.js
        uses: actions/setup-node@v3
        with:
          node-version: '18'
          cache: 'npm'

      - name: Install dependencies
        run: npm ci

      - name: Run linting
        run: npm run lint

      - name: Run tests
        run: npm test

      - name: Run security scan
        run: npm audit

      - name: Upload coverage
        uses: codecov/codecov-action@v3

  build:
    needs: test
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - uses: actions/checkout@v3

      - name: Log in to Container Registry
        uses: docker/login-action@v2
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v4
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}

  deploy-staging:
    needs: build
    if: github.ref == 'refs/heads/develop'
    runs-on: ubuntu-latest
    environment: staging

    steps:
      - name: Deploy to staging
        run: |
          kubectl set image deployment/myapp \
            myapp=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }} \
            --namespace=staging

      - name: Wait for rollout
        run: kubectl rollout status deployment/myapp -n staging

      - name: Run smoke tests
        run: npm run test:smoke

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

    steps:
      - name: Deploy to production
        run: |
          kubectl set image deployment/myapp \
            myapp=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }} \
            --namespace=production

      - name: Wait for rollout
        run: kubectl rollout status deployment/myapp -n production