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DevOps HOME

DevOps isn't a job title — it's a ceasefire between devs who ship code and ops who keep the lights on You got your backend running locally , congrats. Now figure out how to get it to production without waking up to a 3AM PagerDuty alert because someone's Node process OOM-killed itself on a $5 VPS

What DevOps Actually Means for Backend Developers

Forget the buzzword bingo — CI/CD pipelines , containerization , infrastructure as code — these aren't abstract concepts you cram for an interview. They're survival tools when your Express API needs to handle 10k concurrent users and the database connection pool throws in the towel

A backend dev who understands DevOps ships faster , breaks less , and sleeps more That's the whole game

The stack we're covering:

  • Containerization (Docker) — package your app so it runs the same everywhere , kill the "works on my machine" curse forever
  • Orchestration (Docker Compose , Kubernetes) — when one container isn't enough and you need a whole ecosystem of services talking to each other without stabbing each other in the back
  • CI/CD — automate the boring shit so every commit goes through lint , test , build , deploy without you babysitting it
  • Infrastructure as Code — your servers defined in YAML so you can version control , review , and reproduce your entire infrastructure with one command
  • DevSecOps — security baked in from the start instead of bolted on after someone drops a database

The Big Picture

flowchart TD
    Dev[Developer commits code to git repo]
    CI[CI Pipeline triggers - lint, test, build]
    Docker[Build Docker image - Push to registry]
    CD[CD Pipeline deploys to staging/production]
    Monitor[Monitoring & Alerting - logs, metrics, trace]

    Dev --> CI
    CI --> Docker
    Docker --> CD
    CD --> Monitor

What You'll Know After This Section

  • Docker — build images , write Dockerfiles , use Docker Compose for multi-service setups
  • Container Security — stop running everything as root , scan your images for known vulns
  • CI/CD — set up GitHub Actions that actually test and deploy your shit properly
  • Environment Management — .env files for days , secrets that stay secret , config per environment
  • Secrets Management — no more API keys hardcoded in git history
  • Scaling — horizontal scaling , database connection pooling , caching layers that actually cache
  • Monitoring — structured logging , Prometheus metrics , health checks , dashboards that don't lie
  • Kubernetes — stay alive for the intro , because K8s is a beast that eats junior devs for breakfast

Prerequisites

Node.js section , Express section — you need to have backend apps worth deploying

next → devops_01_docker_intro.md