Kubernetes Resources

apiVersion: apps/v1
kind: Deployment
metadata:
  name: web-application
  namespace: production
  labels:
    app: web-application
    tier: frontend
spec:
  replicas: 3
  selector:
    matchLabels:
      app: web-application
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
  template:
    metadata:
      labels:
        app: web-application
        tier: frontend
    spec:
      containers:
      - name: web-application
        image: nginx:1.21-alpine
        imagePullPolicy: Always
        ports:
        - containerPort: 80
          name: http
        resources:
          limits:
            cpu: "500m"
            memory: "512Mi"
          requests:
            cpu: "100m"
            memory: "128Mi"
        livenessProbe:
          httpGet:
            path: /health
            port: http
          initialDelaySeconds: 30
          periodSeconds: 10
        readinessProbe:
          httpGet:
            path: /ready
            port: http
          initialDelaySeconds: 5
          periodSeconds: 5
        env:
        - name: NODE_ENV
          value: "production"
        volumeMounts:
        - name: config-volume
          mountPath: /etc/nginx/conf.d
      volumes:
      - name: config-volume
        configMap:
          name: nginx-config

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: postgres-db
  namespace: database
  labels:
    app: postgres-db
spec:
  serviceName: "postgres"
  replicas: 3
  selector:
    matchLabels:
      app: postgres-db
  template:
    metadata:
      labels:
        app: postgres-db
    spec:
      terminationGracePeriodSeconds: 60
      containers:
      - name: postgres
        image: postgres:14.2
        ports:
        - containerPort: 5432
          name: postgres
        env:
        - name: POSTGRES_USER
          valueFrom:
            secretKeyRef:
              name: postgres-secret
              key: username
        - name: POSTGRES_PASSWORD
          valueFrom:
            secretKeyRef:
              name: postgres-secret
              key: password
        volumeMounts:
        - name: postgres-data
          mountPath: /var/lib/postgresql/data
  volumeClaimTemplates:
  - metadata:
      name: postgres-data
    spec:
      accessModes: [ "ReadWriteOnce" ]
      storageClassName: "longhorn" # Example storage class
      resources:
        requests:
          storage: 10Gi