Docker & Kubernetes : Notre workflow de déploiement continu

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

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

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 linter
        run: npm run lint

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

      - name: Build
        run: npm run build

  build-and-push:
    needs: test
    if: github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3

      - name: Login to Docker Hub
        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Build and push
        uses: docker/build-push-action@v4
        with:
          context: .
          push: true
          tags: wapiki/keneya-frontend:${{ github.sha }},wapiki/keneya-frontend:latest

# Build stage
FROM node:18-alpine AS builder

WORKDIR /app

COPY package*.json ./
RUN npm ci --only=production

COPY . .
RUN npm run build

# Production stage
FROM node:18-alpine

WORKDIR /app

COPY --from=builder /app/dist ./dist
COPY --from=builder /app/node_modules ./node_modules
COPY package*.json ./

ENV NODE_ENV=production
EXPOSE 3000

CMD ["node", "dist/main.js"]

# k8s/deployment.yml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: keneya-frontend
  namespace: production
spec:
  replicas: 3
  selector:
    matchLabels:
      app: keneya-frontend
  template:
    metadata:
      labels:
        app: keneya-frontend
    spec:
      containers:
      - name: frontend
        image: wapiki/keneya-frontend:latest
        ports:
        - containerPort: 3000
        env:
        - name: NODE_ENV
          value: "production"
        - name: API_URL
          valueFrom:
            configMapKeyRef:
              name: app-config
              key: api_url
        resources:
          requests:
            memory: "256Mi"
            cpu: "250m"
          limits:
            memory: "512Mi"
            cpu: "500m"
        livenessProbe:
          httpGet:
            path: /health
            port: 3000
          initialDelaySeconds: 30
          periodSeconds: 10
        readinessProbe:
          httpGet:
            path: /ready
            port: 3000
          initialDelaySeconds: 5
          periodSeconds: 5
---
apiVersion: v1
kind: Service
metadata:
  name: keneya-frontend
  namespace: production
spec:
  selector:
    app: keneya-frontend
  ports:
  - port: 80
    targetPort: 3000
  type: ClusterIP

# k8s/ingress.yml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: keneya-ingress
  namespace: production
  annotations:
    cert-manager.io/cluster-issuer: "letsencrypt-prod"
    nginx.ingress.kubernetes.io/ssl-redirect: "true"
spec:
  ingressClassName: nginx
  tls:
  - hosts:
    - keneya.com
    secretName: keneya-tls
  rules:
  - host: keneya.com
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: keneya-frontend
            port:
              number: 80

# k8s/hpa.yml
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: keneya-frontend-hpa
  namespace: production
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: keneya-frontend
  minReplicas: 3
  maxReplicas: 10
  metrics:
  - type: Resource
    resource:
      name: cpu
      target:
        type: Utilization
        averageUtilization: 70

# prometheus/prometheus.yml
global:
  scrape_interval: 15s

scrape_configs:
  - job_name: 'kubernetes-pods'
    kubernetes_sd_configs:
    - role: pod
    relabel_configs:
    - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scrape]
      action: keep
      regex: true

#!/bin/bash
# deploy.sh

# 1. Build and push image
docker build -t wapiki/keneya-frontend:$VERSION .
docker push wapiki/keneya-frontend:$VERSION

# 2. Update Kubernetes
kubectl set image deployment/keneya-frontend \
  frontend=wapiki/keneya-frontend:$VERSION \
  -n production

# 3. Wait for rollout
kubectl rollout status deployment/keneya-frontend -n production

# 4. Health check
kubectl exec -it deployment/keneya-frontend -n production -- curl localhost:3000/health