apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: apicore-postgres
spec:
  serviceName: apicore-postgres
  replicas: 1
  selector:
    matchLabels:
      app: apicore-postgres
  template:
    metadata:
      labels:
        app: apicore-postgres
    spec:
      containers:
        - name: postgres
          image: postgres:18.6-alpine
          ports:
            - containerPort: 5432
          envFrom:
            - secretRef:
                name: apicore-postgres-secret
          env:
            # Unterordner statt Mount-Root: Postgres' initdb verlangt ein
            # leeres Datenverzeichnis, der Mount-Root von PersistentVolumes
            # enthaelt aber oft ein verstecktes "lost+found"-Verzeichnis.
            - name: PGDATA
              value: /var/lib/postgresql/data/pgdata
          volumeMounts:
            - name: data
              mountPath: /var/lib/postgresql/data
          livenessProbe:
            exec:
              command: ["pg_isready", "-U", "$(POSTGRES_USER)", "-d", "$(POSTGRES_DB)"]
            initialDelaySeconds: 30
            periodSeconds: 15
          readinessProbe:
            exec:
              command: ["pg_isready", "-U", "$(POSTGRES_USER)", "-d", "$(POSTGRES_DB)"]
            initialDelaySeconds: 10
            periodSeconds: 10
          resources:
            requests:
              cpu: "0"
              memory: "0"
            limits:
              cpu: "1"
              memory: 1Gi
  volumeClaimTemplates:
    - metadata:
        name: data
      spec:
        accessModes: ["ReadWriteOnce"]
        resources:
          requests:
            storage: 10Gi