Introduce permission check in kubernetes frontend

Signed-off-by: Dominika Zemanovicova <dzemanov@redhat.com>

plugins/kubernetes-cluster/package.json

@@ -47,6 +47,7 @@
     "@backstage/plugin-catalog-react": "workspace:^",
     "@backstage/plugin-kubernetes-common": "workspace:^",
     "@backstage/plugin-kubernetes-react": "workspace:^",
+    "@backstage/plugin-permission-react": "workspace:^",
     "@kubernetes-models/apimachinery": "^2.0.0",
     "@kubernetes-models/base": "^5.0.0",
     "@material-ui/core": "^4.12.2",

plugins/kubernetes-cluster/src/components/KubernetesClusterContent/KubernetesClusterContent.tsx

@@ -24,6 +24,8 @@ import {
   useKubernetesClusterError,
 } from '../KubernetesClusterErrorContext/KubernetesClusterErrorContext';
 import { WarningPanel } from '@backstage/core-components';
+import { useKubernetesClustersPermission } from '../../hooks/useKubernetesClustersPermission';
+import { kubernetesClustersPermission } from '@backstage/plugin-kubernetes-common';
 
 const ContentGrid = () => {
   const { error } = useKubernetesClusterError();
@@ -57,7 +59,15 @@ const ContentGrid = () => {
  * @public
  */
 export const KubernetesClusterContent = () => {
-  return (
+  const hasKubernetesClustersPermission = useKubernetesClustersPermission();
+
+  return !hasKubernetesClustersPermission ? (
+    <WarningPanel
+      title="Permission required"
+      message={`To view Kubernetes objects, contact your administrator to give you the 
+                    '${kubernetesClustersPermission.name}' permission.`}
+    />
+  ) : (
     <KubernetesClusterErrorProvider>
       <ContentGrid />
     </KubernetesClusterErrorProvider>

plugins/kubernetes-cluster/src/hooks/useKubernetesClustersPermission.ts

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2025 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { kubernetesClustersPermission } from '@backstage/plugin-kubernetes-common';
+import { usePermission } from '@backstage/plugin-permission-react';
+
+export const useKubernetesClustersPermission = () => {
+  const kubernetesClustersPermissionResult = usePermission({
+    permission: kubernetesClustersPermission,
+  });
+
+  return kubernetesClustersPermissionResult.allowed;
+};