k3s-cluster/cluster/apps/database/postgresql/service.yaml

apiVersion: v1
kind: Service
metadata:
  name: postgresql
  namespace: database

  labels:
    app: postgresql
    database: postgresql
    kubernetes.io/name: "postgresql"
spec:
  selector:
    app: postgresql
  ports:
  - name: pgsql
    port: 5432
    targetPort: 5432