Fixes #75706 - Show warning message when namespace is specified for deleting a cluster-scoped resource

pkg/kubectl/cmd/delete/delete.go

@@ -106,6 +106,7 @@ type DeleteOptions struct {
 	ForceDeletion       bool
 	WaitForDeletion     bool
 	Quiet               bool
+	WarnClusterScope    bool
 
 	GracePeriod int
 	Timeout     time.Duration
@@ -149,6 +150,8 @@ func (o *DeleteOptions) Complete(f cmdutil.Factory, args []string, cmd *cobra.Co
 		return err
 	}
 
+	o.WarnClusterScope = enforceNamespace && !o.DeleteAllNamespaces
+
 	if o.DeleteAll || len(o.LabelSelector) > 0 || len(o.FieldSelector) > 0 {
 		if f := cmd.Flags().Lookup("ignore-not-found"); f != nil && !f.Changed {
 			// If the user didn't explicitly set the option, default to ignoring NotFound errors when used with --all, -l, or --field-selector
@@ -216,6 +219,7 @@ func (o *DeleteOptions) Validate() error {
 	case o.ForceDeletion:
 		fmt.Fprintf(o.ErrOut, "warning: --force is ignored because --grace-period is not 0.\n")
 	}
+
 	return nil
 }
 
@@ -228,6 +232,7 @@ func (o *DeleteOptions) DeleteResult(r *resource.Result) error {
 	if o.IgnoreNotFound {
 		r = r.IgnoreErrors(errors.IsNotFound)
 	}
+	warnClusterScope := o.WarnClusterScope
 	deletedInfos := []*resource.Info{}
 	uidMap := cmdwait.UIDMap{}
 	err := r.Visit(func(info *resource.Info, err error) error {
@@ -247,6 +252,10 @@ func (o *DeleteOptions) DeleteResult(r *resource.Result) error {
 		}
 		options.PropagationPolicy = &policy
 
+		if warnClusterScope && info.Mapping.Scope.Name() == meta.RESTScopeNameRoot {
+			fmt.Fprintf(o.ErrOut, "warning: deleting cluster-scoped resources, not scoped to the provided namespace\n")
+			warnClusterScope = false
+		}
 		response, err := o.deleteResource(info, options)
 		if err != nil {
 			return err

test/cmd/core.sh

@@ -1326,6 +1326,12 @@ run_namespace_tests() {
   output_message=$(! kubectl get ns/my-namespace 2>&1 "${kube_flags[@]}")
   kube::test::if_has_string "${output_message}" ' not found'
 
+  kubectl create namespace my-namespace
+  kube::test::get_object_assert 'namespaces/my-namespace' "{{$id_field}}" 'my-namespace'
+  output_message=$(! kubectl delete namespace -n my-namespace --all 2>&1 "${kube_flags[@]}")
+  kube::test::if_has_string "${output_message}" 'warning: deleting cluster-scoped resources'
+  kube::test::if_has_string "${output_message}" 'namespace "my-namespace" deleted'
+
   ######################
   # Pods in Namespaces #
   ######################

test/cmd/rbac.sh

@@ -30,6 +30,12 @@ run_clusterroles_tests() {
   kube::test::get_object_assert clusterrolebindings/cluster-admin "{{.metadata.name}}" 'cluster-admin'
 
   # test `kubectl create clusterrole`
+  kubectl create "${kube_flags[@]}" clusterrole pod-admin --verb=* --resource=pods
+  kube::test::get_object_assert clusterrole/pod-admin "{{range.rules}}{{range.verbs}}{{.}}:{{end}}{{end}}" '\*:'
+  output_message=$(kubectl delete clusterrole pod-admin -n test 2>&1 "${kube_flags[@]}")
+  kube::test::if_has_string "${output_message}" 'warning: deleting cluster-scoped resources'
+  kube::test::if_has_string "${output_message}" 'clusterrole.rbac.authorization.k8s.io "pod-admin" deleted'
+
   kubectl create "${kube_flags[@]}" clusterrole pod-admin --verb=* --resource=pods
   kube::test::get_object_assert clusterrole/pod-admin "{{range.rules}}{{range.verbs}}{{.}}:{{end}}{{end}}" '\*:'
   kube::test::get_object_assert clusterrole/pod-admin "{{range.rules}}{{range.resources}}{{.}}:{{end}}{{end}}" 'pods:'

test/cmd/storage.sh

@@ -41,6 +41,13 @@ run_persistent_volumes_tests() {
   # Post-condition: no PVs
   kube::test::get_object_assert pv "{{range.items}}{{$id_field}}:{{end}}" ''
 
+  kubectl create -f test/fixtures/doc-yaml/user-guide/persistent-volumes/volumes/local-01.yaml "${kube_flags[@]}"
+  kube::test::get_object_assert pv "{{range.items}}{{$id_field}}:{{end}}" 'pv0001:'
+  output_message=$(kubectl delete pv -n test --all 2>&1 "${kube_flags[@]}")
+  kube::test::if_has_string "${output_message}" 'warning: deleting cluster-scoped resources'
+  kube::test::if_has_string "${output_message}" 'persistentvolume "pv0001" deleted'
+  kube::test::get_object_assert pv "{{range.items}}{{$id_field}}:{{end}}" ''
+
   set +o nounset
   set +o errexit
 }