Merge pull request kubernetes#107162 from ardaguclu/invalidate-cache-after-delete

Add manually invalidate cache documentation into delete

Author: k8s-ci-robot

hack/testdata/CRD/example-crd-1-cluster-scoped-resource.yaml

@@ -0,0 +1,6 @@
+apiVersion: test.com/v1
+kind: Example
+metadata:
+  name: test
+spec:
+  test: test

hack/testdata/CRD/example-crd-1-cluster-scoped.yaml

@@ -0,0 +1,24 @@
+apiVersion: apiextensions.k8s.io/v1
+kind: CustomResourceDefinition
+metadata:
+  name: examples.test.com
+spec:
+  group: test.com
+  scope: Cluster
+  versions:
+    - name: v1
+      served: true
+      storage: true
+      schema:
+        openAPIV3Schema:
+          type: object
+          properties:
+            spec:
+              type: object
+              properties:
+                test:
+                  type: string
+  names:
+    plural: examples
+    singular: example
+    kind: Example

hack/testdata/CRD/example-crd-1-namespaced-resource.yaml

@@ -0,0 +1,7 @@
+apiVersion: test.com/v1
+kind: Example
+metadata:
+  name: test
+  namespace: default
+spec:
+  test: test

hack/testdata/CRD/example-crd-1-namespaced.yaml

@@ -0,0 +1,24 @@
+apiVersion: apiextensions.k8s.io/v1
+kind: CustomResourceDefinition
+metadata:
+  name: examples.test.com
+spec:
+  group: test.com
+  scope: Namespaced
+  versions:
+    - name: v1
+      served: true
+      storage: true
+      schema:
+        openAPIV3Schema:
+          type: object
+          properties:
+            spec:
+              type: object
+              properties:
+                test:
+                  type: string
+  names:
+    plural: examples
+    singular: example
+    kind: Example

staging/src/k8s.io/kubectl/pkg/cmd/delete/delete.go

@@ -69,7 +69,11 @@ var (
 
 		Note that the delete command does NOT do resource version checks, so if someone submits an
 		update to a resource right when you submit a delete, their update will be lost along with the
-		rest of the resource.`))
+		rest of the resource.
+
+		After a CustomResourceDefinition is deleted, invalidation of discovery cache may take up
+		to 10 minutes. If you don't want to wait, you might want to run "kubectl api-resources"
+		to refresh the discovery cache.`))
 
 	deleteExample = templates.Examples(i18n.T(`
 		# Delete a pod using the type and name specified in pod.json

test/cmd/discovery.sh

@@ -96,6 +96,36 @@ run_resource_aliasing_tests() {
   set +o errexit
 }
 
+run_crd_deletion_recreation_tests() {
+  set -o nounset
+  set -o errexit
+
+  create_and_use_new_namespace
+  kube::log::status "Testing resource creation, deletion, and re-creation"
+
+  output_message=$(kubectl apply -f hack/testdata/CRD/example-crd-1-cluster-scoped.yaml)
+  kube::test::if_has_string "${output_message}" 'created'
+  output_message=$(kubectl apply -f hack/testdata/CRD/example-crd-1-cluster-scoped-resource.yaml)
+  kube::test::if_has_string "${output_message}" 'created'
+  output_message=$(kubectl delete -f hack/testdata/CRD/example-crd-1-cluster-scoped.yaml)
+  kube::test::if_has_string "${output_message}" 'deleted'
+  # Invalidate local cache because cluster scoped CRD in cache is stale.
+  # Invalidation of cache may take up to 10 minutes and we are manually
+  # invalidate cache and expect that scope changed CRD should be created without problem.
+  kubectl api-resources
+  output_message=$(kubectl apply -f hack/testdata/CRD/example-crd-1-namespaced.yaml)
+  kube::test::if_has_string "${output_message}" 'created'
+  output_message=$(kubectl apply -f hack/testdata/CRD/example-crd-1-namespaced-resource.yaml)
+  kube::test::if_has_string "${output_message}" 'created'
+
+  # Cleanup
+  kubectl delete -f hack/testdata/CRD/example-crd-1-namespaced-resource.yaml
+  kubectl delete -f hack/testdata/CRD/example-crd-1-namespaced.yaml
+
+  set +o nounset
+  set +o errexit
+}
+
 run_kubectl_explain_tests() {
   set -o nounset
   set -o errexit

test/cmd/legacy-script.sh

@@ -892,6 +892,13 @@ runTests() {
     record_command run_kubectl_explain_tests
   fi
 
+  ##############################
+  # CRD Deletion / Re-creation #
+  ##############################
+
+  if kube::test::if_supports_resource "${namespaces}" ; then
+      record_command run_crd_deletion_recreation_tests
+  fi
 
   ###########
   # Swagger #