apiVersion: apps/v1
kind: Deployment
metadata:
  name: myapp
  labels:
    app: myapp
    version: v1
spec:
  replicas: 3
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
  selector:
    matchLabels:
      app: myapp
  template:
    metadata:
      labels:
        app: myapp
        version: v1
    spec:
      containers:
      - name: myapp
        image: your-registry/myapp:latest
        imagePullPolicy: Always
        ports:
        - name: http
          containerPort: 8080
          protocol: TCP
        env:
        - name: APP_ENV
          value: "production"
        - name: PORT
          value: "8080"
        # Environment variables from ConfigMap
        envFrom:
        - configMapRef:
            name: myapp-config
        # Environment variables from Secret
        - secretRef:
            name: myapp-secret
        resources:
          requests:
            memory: "128Mi"
            cpu: "100m"
          limits:
            memory: "256Mi"
            cpu: "200m"
        livenessProbe:
          httpGet:
            path: /health
            port: 8080
          initialDelaySeconds: 30
          periodSeconds: 10
          timeoutSeconds: 5
          failureThreshold: 3
        readinessProbe:
          httpGet:
            path: /ready
            port: 8080
          initialDelaySeconds: 5
          periodSeconds: 5
          timeoutSeconds: 3
          failureThreshold: 3
      # Optional: Image pull secrets
      # imagePullSecrets:
      # - name: registry-secret