Fix could not find WorkloadDefinition issue

When there is spec.type in Workload, an annotation will set for
the workload which can help find the WorkloadDefinition.

Fix issue crossplane#207, related to feature crossplane#195.

Co-authored-by: Sun Jianbo <wonderflow.sun@gmail.com>
Signed-off-by: zzxwill <zzxwill@gmail.com>

README.md

@@ -77,7 +77,7 @@ Or you can install with webhook enabled by following steps:
     kubectl -n oam-system create secret generic webhook-server-cert --from-file=tls.key=./oam-kubernetes-runtime-webhook.key --from-file=tls.crt=./oam-kubernetes-runtime-webhook.pem
     ```
 
-  - Step 3: Get CA Bundle info and install with it's value
+  - Step 3: Get CA Bundle info and install with its value
 
     ```shell script
     caValue=`kubectl config view --raw --minify --flatten -o jsonpath='{.clusters[].cluster.certificate-authority-data}'`

pkg/oam/util/helper.go

@@ -39,6 +39,9 @@ var (
 const (
 	// TraitPrefixKey is prefix of trait name
 	TraitPrefixKey = "trait"
+	// DefinitionAnnotation is one automatically generated annotation of workload and trait to indicate which
+	//workloadDefinition/traitDefinition it is generated by
+	DefinitionAnnotation = "definition.oam.dev/name"
 )
 
 const (
@@ -226,7 +229,13 @@ func PassLabelAndAnnotation(parentObj oam.Object, childObj labelAnnotationObject
 
 // GetCRDName return the CRD name of any resources
 // the format of the CRD of a resource is <kind purals>.<group>
+// Now the CRD name of a resource could also be defined as `definition.oam.dev/name` in `metadata.annotations`
 func GetCRDName(u *unstructured.Unstructured) string {
+	if annotations := u.GetAnnotations(); annotations != nil {
+		if crdName, ok := annotations[DefinitionAnnotation]; ok {
+			return crdName
+		}
+	}
 	group, _ := APIVersion2GroupVersion(u.GetAPIVersion())
 	resources := []string{Kind2Resource(u.GetKind())}
 	if group != "" {

pkg/webhook/v1alpha2/applicationconfiguration/applicationconfiguration.go

@@ -136,7 +136,7 @@ func (h *ValidatingHandler) InjectDecoder(d *admission.Decoder) error {
 	return nil
 }
 
-// Register will regsiter application configuration validation to webhook
+// Register will register application configuration validation to webhook
 func Register(mgr manager.Manager) {
 	server := mgr.GetWebhookServer()
 	server.Register("/validating-core-oam-dev-v1alpha2-applicationconfigurations", &webhook.Admission{Handler: &ValidatingHandler{}})

pkg/webhook/v1alpha2/component/mutating_handler.go

@@ -125,7 +125,9 @@ func (h *MutatingHandler) Mutate(obj *v1alpha2.Component) error {
 		// copy namespace/label/annotation to the workload and add workloadType label
 		workload.SetNamespace(obj.GetNamespace())
 		workload.SetLabels(util.MergeMap(obj.GetLabels(), map[string]string{WorkloadTypeLabel: workloadType}))
-		workload.SetAnnotations(obj.GetAnnotations())
+		// Add another annotation DefinitionAnnotation which can mark the name of WorkloadDefinition
+		workload.SetAnnotations(util.MergeMap(obj.GetAnnotations(), map[string]string{util.DefinitionAnnotation: workloadType}))
+		mutatelog.Info("Set annotation definition.oam.dev/name for workload", "annotation value", workloadType)
 		// copy back the object
 		rawBye, err := json.Marshal(workload.Object)
 		if err != nil {