apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: stateful-app
  namespace: my-app
spec:
  serviceName: "stateful-app"
  replicas: 1
  selector:
    matchLabels:
      app: stateful-app
  template:
    metadata:
      labels:
        app: stateful-app
    spec:
      containers:
        - name: stateful-app-container
          image: antonin193/simple-web-app:latest
          imagePullPolicy: Always
          ports:
            - containerPort: 5000
          env:
            - name: DB_HOST
              value: postgres
            - name: DB_PORT
              value: "5432"
            - name: DB_NAME
              value: postgres
            - name: DB_USER
              value: postgres
            - name: DB_PASS
              value: postgres
          resources:
            requests:
              memory: "64Mi"
              cpu: "100m"
            limits:
              memory: "128Mi"
              cpu: "200m"
          volumeMounts:
            - name: app-storage
              mountPath: /data  
          readinessProbe:
            httpGet:
              path: /
              port: 5000
            initialDelaySeconds: 15
            periodSeconds: 20
  volumeClaimTemplates:
    - metadata:
        name: app-storage
      spec:
        accessModes:
          - ReadWriteOnce
        storageClassName: manual
        resources:
          requests:
            storage: 1Gi