feat: simplify the schema of NamespacedControllerReconciler

[jingyih]

Example NamespacedControllerReconciler CR:

apiVersion: customize.core.cnrm.cloud.google.com/v1alpha1
kind: NamespacedControllerReconciler
metadata:
  name: cnrm-controller-manager # name should not contain the namespace ID suffix
  namespace: config-control
spec:
  rateLimit:
    qps: 80
    burst: 30

Prior to applying the example NamespacedControllerReconciler CR:

$ kubectl get pods cnrm-controller-manager-o6k4tubitdex7vqqw6xa-0 -n cnrm-system -oyaml
...
uid: bd11f23d-4ab7-4459-a08a-b684b1a8b787
spec:
  containers:
  - args:
    - --scoped-namespace=config-control
    - --prometheus-scrape-endpoint=:8888
    command:
    - /configconnector/manager
    image: gcr.io/gke-release/cnrm/controller:fd4c42c
    imagePullPolicy: Always
    name: manager
    ports:
    - containerPort: 23232
      protocol: TCP
...

After applying the example NamespacedControllerReconciler CR:

$ kubectl get pods cnrm-controller-manager-o6k4tubitdex7vqqw6xa-0 -n cnrm-system -oyaml
...
uid: ba7a7b87-f9ad-4e15-b40c-cf008b70265f
spec:
  containers:
  - args:
    - --qps=80
    - --burst=30
    - --scoped-namespace=config-control
    - --prometheus-scrape-endpoint=:8888
    command:
    - /configconnector/manager
    image: gcr.io/gke-release/cnrm/controller:fd4c42c
    imagePullPolicy: Always
    name: manager
    ports:
    - containerPort: 23232
      protocol: TCP
...

The status of NamespacedControllerReconciler CR:

Spec:
  Rate Limit:
    Burst:  30
    Qps:    80
Status:
  Healthy:  true
Events:     <none>

Applying an invalid CR with the wrong name:

apiVersion: customize.core.cnrm.cloud.google.com/v1alpha1
kind: NamespacedControllerReconciler
metadata:
  name: some-controller  # invalid controller name
  namespace: config-control
spec:
  rateLimit:
    qps: 80

The status of the invalid CR:

Spec:
  Rate Limit:
    Burst:  30
    Qps:    80
Status:
  Errors:
    failed to apply rate limit customization some-controller: rate limit customization for some-controller is not supported. Supported controllers: cnrm-controller-manager
  Healthy:  false
Events:     <none>

[jingyih]

/assign @yuwenma

[yuwenma]

/lgtm /approve

Looks great! I like the new CRD and the error messages.

[google-oss-prow[bot]]

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