CI/CD Pipeline Design

How would you design a CI/CD pipeline for a microservices application? What stages would you include?

CI/CDintermediate

// interview question

How would you design a CI/CD pipeline for a microservices application? What stages would you include?

Sample answer

A comprehensive pipeline includes: 1) Build stage - compile code, install dependencies. 2) Test stage - unit tests, integration tests, code coverage. 3) Security scanning - SAST, dependency scanning, container scanning. 4) Artifact creation - build and push Docker images. 5) Deploy to staging - automated deployment with smoke tests. 6) Performance/E2E tests - load testing, end-to-end tests. 7) Deploy to production - with approval gates, canary or blue-green deployment. Include notifications, rollback mechanisms, and artifact versioning throughout.

Why this matters

Pipeline design impacts developer productivity, deployment frequency, and system reliability. A well-designed pipeline catches issues early, provides fast feedback, and enables confident production deployments. This is a core DevOps competency.

Code examples

GitHub Actions pipeline example

yaml

name: CI/CD Pipeline
on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  build-and-test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Run tests
        run: npm test
      - name: Security scan
        run: npm audit

  deploy-staging:
    needs: build-and-test
    if: github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    steps:
      - name: Deploy to staging
        run: ./deploy.sh staging

  deploy-production:
    needs: deploy-staging
    runs-on: ubuntu-latest
    environment: production
    steps:
      - name: Deploy to production
        run: ./deploy.sh production

Common mistakes to avoid

Skipping tests to deploy faster
Not having environment parity between staging and production
Missing rollback mechanisms

Likely follow-ups

How do you handle database migrations in a CI/CD pipeline?
What is the difference between continuous delivery and continuous deployment?
How do you implement rollback in your pipelines?

Answer out loud first, then check yourself against the model answer.

Practice all Mid-Level questions More CI/CD questions

#cicd#pipeline#automation#deployment#devops

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