devops-patterns

DevOps Patterns

This skill provides comprehensive guidance for implementing DevOps practices, automation, and deployment strategies.

CI/CD Pipeline Design

Pipeline Stages

# Complete CI/CD Pipeline
stages:
  - lint          # Code quality checks
  - test          # Run test suite
  - build         # Build artifacts
  - scan          # Security scanning
  - deploy-dev    # Deploy to development
  - deploy-staging # Deploy to staging
  - deploy-prod   # Deploy to production

Pipeline Best Practices

1. Fast Feedback: Run fastest checks first

jobs:
  # Quick checks first (1-2 minutes)
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - run: npm run lint

  type-check:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - run: npm run type-check

  # Longer tests after (5-10 minutes)
  test:
    needs: [lint, type-check]
    runs-on: ubuntu-latest
    steps:
      - run: npm test

2. Fail Fast: Stop pipeline on first failure 3. Idempotent: Running twice produces same result 4. Versioned: Pipeline config in version control

GitHub Actions Patterns

Basic Workflow Structure

# .github/workflows/ci.yml
name: CI

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

env:
  NODE_VERSION: '18'

jobs:
  test:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Setup Node.js
        uses: actions/setup-node@v3
        with:
          node-version: ${{ env.NODE_VERSION }}
          cache: 'npm'

      - name: Install dependencies
        run: npm ci

      - name: Run tests
        run: npm test

      - name: Upload coverage
        uses: codecov/codecov-action@v3
        with:
          files: ./coverage/coverage-final.json

Reusable Workflows

# .github/workflows/reusable-test.yml
name: Reusable Test Workflow

on:
  workflow_call:
    inputs:
      node-version:
        required: true
        type: string
    secrets:
      DATABASE_URL:
        required: true

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-node@v3
        with:
          node-version: ${{ inputs.node-version }}
      - run: npm ci
      - run: npm test
        env:
          DATABASE_URL: ${{ secrets.DATABASE_URL }}

# Use in another workflow
# .github/workflows/main.yml
jobs:
  call-test:
    uses: ./.github/workflows/reusable-test.yml
    with:
      node-version: '18'
    secrets:
      DATABASE_URL: ${{ secrets.DATABASE_URL }}