This works: apiVersion: apps/v1 kind: Deployment metadata: name: postgres spec: replicas: 1 selector: matchLabels: app: postgres template: metadata: labels: app: postgres spec: containers: - name: postgres image: postgres:17 imagePullPolicy: "IfNotPresent" ports: - containerPort: 5432 envFrom: - configMapRef: name: postgres-config env: - name: PGDATA value: /var/lib/postgresql/data/pgdata volumeMounts: - mountPath: "/var/lib/postgresql/data" name: postgredb volumes: - name: postgredb persistentVolumeClaim: claimName: postgres-pv-claim