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CI/CD Hands-On Labs

🎯 Overview

Build and deploy applications using GitHub Actions, GitLab CI, and ArgoCD.

📚 Lab 1: GitHub Actions Pipeline

Objective: Create a complete CI/CD pipeline

Setup

mkdir cicd-lab && cd cicd-lab
git init
npm init -y

Create Workflow

# .github/workflows/ci-cd.yml
name: CI/CD Pipeline

on:
  push:
    branches: [main]
  pull_request:

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: 'npm'
      - run: npm ci
      - run: npm test

  build:
    needs: test
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - uses: docker/build-push-action@v5
        with:
          push: true
          tags: ghcr.io/${{ github.repository }}:${{ github.sha }}

  deploy:
    needs: build
    if: github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    environment: production
    steps:
      - name: Deploy
        run: echo "Deploying to production..."

📚 Lab 2: GitOps with ArgoCD

Objective: Deploy using GitOps workflow

Install ArgoCD

kubectl create namespace argocd
kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml

# Get password
kubectl -n argocd get secret argocd-initial-admin-secret -o jsonpath="{.data.password}" | base64 -d

Create Application

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: myapp
  namespace: argocd
spec:
  project: default
  source:
    repoURL: https://github.com/myorg/myapp-manifests
    targetRevision: HEAD
    path: kubernetes
  destination:
    server: https://kubernetes.default.svc
    namespace: default
  syncPolicy:
    automated:
      prune: true
      selfHeal: true

📚 Lab 3: Multi-Environment Deployment

Objective: Deploy to dev/staging/prod

Kustomize Structure

manifests/
├── base/
│   ├── deployment.yaml
│   ├── service.yaml
│   └── kustomization.yaml
└── overlays/
    ├── dev/
    │   └── kustomization.yaml
    ├── staging/
    │   └── kustomization.yaml
    └── prod/
        └── kustomization.yaml

Environment Overlay

# overlays/prod/kustomization.yaml
apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
namespace: production
resources:
  - ../../base
replicas:
  - name: myapp
    count: 3
images:
  - name: myapp
    newTag: v1.0.0

✅ Completion Checklist

  • Lab 1: GitHub Actions pipeline
  • Lab 2: ArgoCD GitOps
  • Lab 3: Multi-environment Kustomize