Display the resources created in ArgoCD associated to a CRD instance

Please, answer some short questions which should help us to understand your problem / question better?

• Which image of the operator are you using?
  registry.opensource.zalan.do/acid/postgres-operator:v1.7.1

• Where do you run it - cloud or metal? Kubernetes or OpenShift?
  AWS K8s EKS

• Are you running Postgres Operator in production?
  yes

• Type of issue?
  feature request

🐛 Current Implementation

• We can see the CRD instance postgres, but we don't see the list of resources
• We don't see the resources created...
  • Endpoints
  • Services
  • Secrets
  • StatefulSet

❓What to display the created resources?

• When we create a database, we see the list of resources created, those are listed in the Events section
  • Endpoints
  • Services
  • Secrets
  • StatefulSet
  • PersistentVolumeClaim

$ kubectl describe postgresqls -n x-aws-sae1-prdt-ppd-dev
Name:         x-postgres-server-aws-sae1-prdt-ppd-dev
Namespace:    x-aws-sae1-prdt-ppd-dev
Labels:       app.kubernetes.io/instance=x-postgres-server-aws-sae1-ppd-dev
              cloud=aws
              env=dev
              product=x
              region=sae1
              segment=ppd
              type=prdt
Annotations:  <none>
API Version:  acid.zalan.do/v1
Kind:         postgresql
Metadata:
  Creation Timestamp:  2022-02-01T00:57:09Z
  Generation:          1
  Managed Fields:
    API Version:  acid.zalan.do/v1
    Fields Type:  FieldsV1
    fieldsV1:
      f:metadata:
        f:annotations:
    Manager:      argocd-application-controller
    Operation:    Update
    Time:         2022-02-01T00:57:09Z
    API Version:  acid.zalan.do/v1
    Fields Type:  FieldsV1
    fieldsV1:
      f:status:
        .:
        f:PostgresClusterStatus:
    Manager:         postgres-operator
    Operation:       Update
    Time:            2022-02-01T00:57:09Z
  Resource Version:  1342972
  UID:               72927efa-5dec-4696-8f84-87452c4da221
Spec:
  Databases:
    x:                  y
  Enable Master Load Balancer:  true
  Node Affinity:
    Required During Scheduling Ignored During Execution:
      Node Selector Terms:
        Match Expressions:
          Key:       x.z-worker_group-name
          Operator:  In
          Values:
            system
  Number Of Instances:  2
  Postgresql:
    Version:  14
  Prepared Databases:
    x:
  Resources:
    Limits:
      Cpu:     750m
      Memory:  1Gi
    Requests:
      Cpu:     750m
      Memory:  1Gi
  Team Id:     xy
  Users:
    xz:
      superuser
      createdb
  Volume:
    Size:  10Gi
Status:
  Postgres Cluster Status:  Creating
Events:
  Type    Reason       Age   From               Message
  ----    ------       ----  ----               -------
  Normal  Create       36s   postgres-operator  Started creation of new cluster resources
  Normal  Endpoints    36s   postgres-operator  Endpoint "x-aws-sae1-prdt-ppd-dev/x-postgres-server-aws-sae1-prdt-ppd-dev" has been successfully created
  Normal  Services     36s   postgres-operator  The service "x-aws-sae1-prdt-ppd-dev/x-postgres-server-aws-sae1-prdt-ppd-dev" for role master has been successfully created
  Normal  Services     36s   postgres-operator  The service "x-aws-sae1-prdt-ppd-dev/x-postgres-server-aws-sae1-prdt-ppd-dev-repl" for role replica has been successfully created
  Normal  Secrets      35s   postgres-operator  The secrets have been successfully created
  Normal  StatefulSet  35s   postgres-operator  Statefulset "x-aws-sae1-prdt-ppd-dev/x-postgres-server-aws-sae1-prdt-ppd-dev" has been successfully created

• In addition, other resources include the PVCs created by the deployment

Volumes:
  pgdata:
    Type:       PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace)
    ClaimName:  pgdata-x-postgres-server-aws-sae1-prdt-ppd-dev-0
    ReadOnly:   false

🎉 What should we see?

• ArgoCD helps visualizing and automating GitOps operations based on the deployment
• All the resources listed and associated with the CRD
  • Endpoints
  • Services
  • Secrets
  • StatefulSet

Events:
  Type    Reason       Age   From               Message
  ----    ------       ----  ----               -------
  Normal  Create       36s   postgres-operator  Started creation of new cluster resources
  Normal  Endpoints    36s   postgres-operator  Endpoint "x-aws-sae1-prdt-ppd-dev/x-postgres-server-aws-sae1-prdt-ppd-dev" has been successfully created
  Normal  Services     36s   postgres-operator  The service "x-aws-sae1-prdt-ppd-dev/x-postgres-server-aws-sae1-prdt-ppd-dev" for role master has been successfully created
  Normal  Services     36s   postgres-operator  The service "x-aws-sae1-prdt-ppd-dev/x-postgres-server-aws-sae1-prdt-ppd-dev-repl" for role replica has been successfully created
  Normal  Secrets      35s   postgres-operator  The secrets have been successfully created
  Normal  StatefulSet  35s   postgres-operator  Statefulset "x-aws-sae1-prdt-ppd-dev/x-postgres-server-aws-sae1-prdt-ppd-dev" has been successfully created

• It should display all of them on the same screen

🔧 Configuration Used

• A configuration in ArgoCD looks like the following:
  • Application.yaml that links a Github Repo resource (Ref, Dir) to a Namespace in a K8S cluster

SEE: https://argo-cd.readthedocs.io/en/stable/operator-manual/declarative-setup/#applications

Start with the ArgoCD Application.yaml configuration described in the issue and the Kubernetes CRD instance shown in the kubectl describe output. Determine how the operator-created Endpoints, Services, Secrets, StatefulSet, and PVCs should be associated with that instance for ArgoCD to display them together. Done means all listed resources appear on the same ArgoCD screen.