apiVersion: apps/v1
kind: Deployment
metadata:
  name: guildhall-postgres
  namespace: guildhall
  labels:
    app.kubernetes.io/name: guildhall-postgres
    app.kubernetes.io/part-of: guildhouse
    app.kubernetes.io/component: database
    app.kubernetes.io/managed-by: manual
spec:
  replicas: 1
  strategy:
    type: Recreate
  selector:
    matchLabels:
      app: guildhall-postgres
  template:
    metadata:
      labels:
        app: guildhall-postgres
        app.kubernetes.io/name: guildhall-postgres
        app.kubernetes.io/part-of: guildhouse
        app.kubernetes.io/component: database
    spec:
      containers:
        - name: postgres
          image: postgres:16
          imagePullPolicy: IfNotPresent
          ports:
            - containerPort: 5432
              name: postgres
          env:
            - name: POSTGRES_DB
              valueFrom:
                secretKeyRef:
                  name: guildhall-db-credentials
                  key: POSTGRES_DB
            - name: POSTGRES_USER
              valueFrom:
                secretKeyRef:
                  name: guildhall-db-credentials
                  key: POSTGRES_USER
            - name: POSTGRES_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: guildhall-db-credentials
                  key: POSTGRES_PASSWORD
            # PGDATA subdir under the mount is the standard fix for the
            # lost+found that some filesystems create at the mount root,
            # which postgres otherwise refuses to initialise into.
            - name: PGDATA
              value: /var/lib/postgresql/data/pgdata
          volumeMounts:
            - name: data
              mountPath: /var/lib/postgresql/data
          # Matches the Keycloak-postgres resource shape from the
          # cluster: memory request 256Mi / limit 512Mi, CPU request
          # 100m, no CPU limit. Guildhall's initial DB load is light
          # so this is over-provisioned for v0.1; can be trimmed later.
          resources:
            requests:
              cpu: 100m
              memory: 256Mi
            limits:
              memory: 512Mi
          readinessProbe:
            exec:
              command:
                - pg_isready
                - -U
                - guildhall
            initialDelaySeconds: 5
            periodSeconds: 10
            timeoutSeconds: 1
            failureThreshold: 3
          livenessProbe:
            exec:
              command:
                - pg_isready
                - -U
                - guildhall
            initialDelaySeconds: 15
            periodSeconds: 20
            timeoutSeconds: 1
            failureThreshold: 3
      volumes:
        - name: data
          persistentVolumeClaim:
            claimName: guildhall-db