mockkubeapiserver: ensure CRDs become ready

Simulate the CRD being accepted into the apiserver and this being
reflected into status, for clients that check status.

Also fix a nil-pointer error due to lack of proper initialization.

mockkubeapiserver/apiserver.go

@@ -51,7 +51,7 @@ func NewMockKubeAPIServer(addr string, options ...Option) (*MockKubeAPIServer, e
 	}
 
 	// These hooks mock behaviour that would otherwise require full controllers
-	s.storage.AddStorageHook(&hooks.CRDHook{})
+	s.storage.AddStorageHook(&hooks.CRDHook{Storage: s.storage})
 	s.storage.AddStorageHook(&hooks.NamespaceHook{})
 	s.storage.AddStorageHook(&hooks.DeploymentHook{})
 

mockkubeapiserver/hooks/crd.go

@@ -17,22 +17,92 @@ limitations under the License.
 package hooks
 
 import (
+	"fmt"
+
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	"k8s.io/klog/v2"
 	"sigs.k8s.io/kubebuilder-declarative-pattern/mockkubeapiserver/storage"
 )
 
 // CRDHook implements functionality for CRD objects (the definitions themselves, not instances of CRDs)
 type CRDHook struct {
-	storage storage.Storage
+	Storage storage.Storage
 }
 
 func (s *CRDHook) OnWatchEvent(ev *storage.WatchEvent) {
 	switch ev.GroupKind() {
 	case schema.GroupKind{Group: "apiextensions.k8s.io", Kind: "CustomResourceDefinition"}:
 		// When a CRD is created, we notify the storage layer so it can store instances of the CRD
-		if err := s.storage.UpdateCRD(ev); err != nil {
+		if err := s.Storage.UpdateCRD(ev); err != nil {
 			klog.Warningf("crd change was invalid: %v", err)
 		}
+
+		if err := s.updateCRDConditions(ev); err != nil {
+			klog.Fatalf("could not update crd status: %v", err)
+		}
+	}
+}
+func (s *CRDHook) updateCRDConditions(ev *storage.WatchEvent) error {
+	u := ev.Unstructured()
+
+	// So that CRDs become ready, we immediately update the status.
+	// We could do something better here, like e.g. a 1 second pause before changing the status
+	statusObj := u.Object["status"]
+	if statusObj == nil {
+		statusObj = make(map[string]interface{})
+		u.Object["status"] = statusObj
 	}
+	status, ok := statusObj.(map[string]interface{})
+	if !ok {
+		return fmt.Errorf("status was of unexpected type %T", statusObj)
+	}
+
+	generation := u.GetGeneration()
+	if generation == 0 {
+		generation = 1
+		u.SetGeneration(generation)
+	}
+
+	var conditions []interface{}
+	conditions = append(conditions, map[string]interface{}{
+		"type":    "NamesAccepted",
+		"status":  "True",
+		"reason":  "NoConflicts",
+		"message": "no conflicts found",
+	})
+	conditions = append(conditions, map[string]interface{}{
+		"type":    "Established",
+		"status":  "True",
+		"reason":  "InitialNamesAccepted",
+		"message": "the initial names have been accepted",
+	})
+	status["conditions"] = conditions
+
+	// TODO: More of status?  Here is an example of the full status
+	// status:
+	//	acceptedNames:
+	//	  kind: VolumeSnapshot
+	//	  listKind: VolumeSnapshotList
+	//	  plural: volumesnapshots
+	//	  singular: volumesnapshot
+	//	conditions:
+	//	- lastTransitionTime: "2023-09-21T01:04:36Z"
+	//	  message: no conflicts found
+	//	  reason: NoConflicts
+	//	  status: "True"
+	//	  type: NamesAccepted
+	//	- lastTransitionTime: "2023-09-21T01:04:36Z"
+	//	  message: the initial names have been accepted
+	//	  reason: InitialNamesAccepted
+	//	  status: "True"
+	//	  type: Established
+	//	- lastTransitionTime: "2023-09-21T01:04:36Z"
+	//	  message: approved in https://github.com/kubernetes-csi/external-snapshotter/pull/419
+	//	  reason: ApprovedAnnotation
+	//	  status: "True"
+	//	  type: KubernetesAPIApprovalPolicyConformant
+	//	storedVersions:
+	//	- v1
+
+	return nil
 }

mockkubeapiserver/storage/memorystorage/crd.go

@@ -62,9 +62,10 @@ func (s *MemoryStorage) UpdateCRD(ev *storage.WatchEvent) error {
 		gr := gvr.GroupResource()
 
 		storage := &resourceStorage{
-			GroupResource: gr,
-			objects:       make(map[types.NamespacedName]*unstructured.Unstructured),
-			parent:        s,
+			GroupResource:        gr,
+			objects:              make(map[types.NamespacedName]*unstructured.Unstructured),
+			parent:               s,
+			resourceVersionClock: &s.resourceVersionClock,
 		}
 
 		// TODO: share storage across different versions