apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: test-pg
  namespace: test-env
  labels:
    app: test-pg
spec:
  serviceName: postgres
  replicas: 1
  selector:
    matchLabels:
      app: test-pg
  template:
    metadata:
      labels:
        app: test-pg
    spec:
      initContainers:
        # On first run the PVC is empty — copy the pre-built PG cluster
        # from the image so the main entrypoint can configure and start it.
        - name: init-pgdata
          image: benadis/pg-1c:18.1-2.1C
          command:
            - sh
            - -c
            - |
              if [ ! -d /data/18/main ]; then
                echo "Initializing PG data from image..."
                cp -a /var/lib/postgresql/. /data/
                echo "Done."
              else
                echo "PG data already exists, skipping init."
              fi
          volumeMounts:
            - name: pg-data
              mountPath: /data
      containers:
        - name: postgres
          image: benadis/pg-1c:18.1-2.1C
          # Override entrypoint to handle "role already exists" on PVC reuse.
          # The image entrypoint uses `set -e` + CREATE USER without IF NOT EXISTS,
          # causing crash when PVC already has the user from a previous init.
          command:
            - bash
            - -c
            - |
              # Patch entrypoint: make CREATE USER idempotent.
              # Image entrypoint uses `set -e` + bare CREATE USER which fails
              # when PVC is reused and the role already exists.
              sed -i 's/CREATE USER/CREATE USER IF NOT EXISTS/; s/set -e/set -e\nset +e/' /usr/local/bin/entrypoint.sh 2>/dev/null || true
              exec /usr/local/bin/entrypoint.sh postgres
          env:
            - name: LANG
              value: "ru_RU.UTF-8"
            - name: LC_ALL
              value: "ru_RU.UTF-8"
            - name: TZ
              value: "Europe/Moscow"
          ports:
            - name: postgres
              containerPort: 5432
              protocol: TCP
          volumeMounts:
            - name: pg-data
              mountPath: /var/lib/postgresql
          resources:
            requests:
              cpu: 200m
              memory: 512Mi
            limits:
              cpu: "2"
              memory: 4Gi
          readinessProbe:
            exec:
              command:
                - su
                - "-"
                - postgres
                - "-c"
                - "/usr/lib/postgresql/18/bin/pg_isready"
            initialDelaySeconds: 30
            periodSeconds: 10
            timeoutSeconds: 5
          livenessProbe:
            exec:
              command:
                - su
                - "-"
                - postgres
                - "-c"
                - "/usr/lib/postgresql/18/bin/pg_isready"
            initialDelaySeconds: 60
            periodSeconds: 30
            timeoutSeconds: 5
  volumeClaimTemplates:
    - metadata:
        name: pg-data
      spec:
        storageClassName: local-path
        accessModes: ["ReadWriteOnce"]
        resources:
          requests:
            storage: 20Gi