apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: postgres
  namespace: iomodel
spec:
  serviceName: postgres
  replicas: 1
  selector: { matchLabels: { app: postgres } }
  template:
    metadata: { labels: { app: postgres } }
    spec:
      containers:
        - name: postgres
          image: postgres:16
          ports: [{ containerPort: 5432 }]
          volumeMounts:
            - name: pgdata
              mountPath: /var/lib/postgresql/data
  volumeClaimTemplates:
    - metadata: { name: pgdata }
      spec:
        accessModes: ['ReadWriteOnce']
        resources: { requests: { storage: 20Gi } }