Merge pull request #6081 from zhzhuang-zju/unjoin

Restrict the cluster sync mode for the unjoin and unregister command

pkg/karmadactl/unjoin/unjoin.go

@@ -17,17 +17,21 @@ limitations under the License.
 package unjoin
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"time"
 
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	kubeclient "k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/rest"
 	"k8s.io/klog/v2"
 	"k8s.io/kubectl/pkg/util/templates"
 
+	clusterv1alpha1 "github.com/karmada-io/karmada/pkg/apis/cluster/v1alpha1"
 	karmadaclientset "github.com/karmada-io/karmada/pkg/generated/clientset/versioned"
 	"github.com/karmada-io/karmada/pkg/karmadactl/options"
 	cmdutil "github.com/karmada-io/karmada/pkg/karmadactl/util"
@@ -194,8 +198,20 @@ func (j *CommandUnjoinOption) RunUnJoinCluster(controlPlaneRestConfig, clusterCo
 	controlPlaneKarmadaClient := controlPlaneKarmadaClientBuilder(controlPlaneRestConfig)
 	controlPlaneKubeClient := controlPlaneKubeClientBuilder(controlPlaneRestConfig)
 
+	target, err := controlPlaneKarmadaClient.ClusterV1alpha1().Clusters().Get(context.TODO(), j.ClusterName, metav1.GetOptions{})
+	if apierrors.IsNotFound(err) {
+		return fmt.Errorf("no cluster object %s found in karmada control Plane", j.ClusterName)
+	}
+	if err != nil {
+		klog.Errorf("Failed to get cluster object. cluster name: %s, error: %v", j.ClusterName, err)
+		return err
+	}
+	if target.Spec.SyncMode == clusterv1alpha1.Pull {
+		return fmt.Errorf("cluster %s is a %s mode member cluster, please use command `unregister` if you want to continue unregistering the cluster", j.ClusterName, target.Spec.SyncMode)
+	}
+
 	// delete the cluster object in host cluster that associates the unjoining cluster
-	err := cmdutil.DeleteClusterObject(controlPlaneKubeClient, controlPlaneKarmadaClient, j.ClusterName, j.Wait, j.DryRun, j.forceDeletion)
+	err = cmdutil.DeleteClusterObject(controlPlaneKubeClient, controlPlaneKarmadaClient, j.ClusterName, j.Wait, j.DryRun, j.forceDeletion)
 	if err != nil {
 		klog.Errorf("Failed to delete cluster object. cluster name: %s, error: %v", j.ClusterName, err)
 		return err

pkg/karmadactl/unjoin/unjoin_test.go

@@ -111,6 +111,34 @@ func TestRunUnJoinCluster(t *testing.T) {
 		wantErr                               bool
 		errMsg                                string
 	}{
+		{
+			name:                   "RunUnJoinCluster_DeleteClusterObject_PullModeMemberCluster",
+			unjoinOpts:             &CommandUnjoinOption{ClusterName: "member1"},
+			controlPlaneRestConfig: &rest.Config{},
+			clusterConfig:          &rest.Config{},
+			karmadaClient:          fakekarmadaclient.NewSimpleClientset(),
+			prep: func(_ kubeclient.Interface, _ kubeclient.Interface, karmadaClient karmadaclientset.Interface, _ *CommandUnjoinOption) error {
+				karmadaClient.(*fakekarmadaclient.Clientset).Fake.PrependReactor("get", "clusters", func(coretesting.Action) (bool, runtime.Object, error) {
+					return true, &clusterv1alpha1.Cluster{
+						ObjectMeta: metav1.ObjectMeta{
+							Name: "member1",
+						},
+						Spec: clusterv1alpha1.ClusterSpec{
+							SyncMode: clusterv1alpha1.Pull,
+						},
+					}, nil
+				})
+				controlPlaneKarmadaClientBuilder = func(*rest.Config) karmadaclientset.Interface {
+					return karmadaClient
+				}
+				return nil
+			},
+			verify: func(kubeclient.Interface, kubeclient.Interface, karmadaclientset.Interface, *CommandUnjoinOption) error {
+				return nil
+			},
+			wantErr: true,
+			errMsg:  "cluster member1 is a Pull mode member cluster, please use command `unregister` if you want to continue unregistering the cluster",
+		},
 		{
 			name:                   "RunUnJoinCluster_DeleteClusterObject_FailedToDeleteClusterObject",
 			unjoinOpts:             &CommandUnjoinOption{ClusterName: "member1"},
@@ -118,6 +146,16 @@ func TestRunUnJoinCluster(t *testing.T) {
 			clusterConfig:          &rest.Config{},
 			karmadaClient:          fakekarmadaclient.NewSimpleClientset(),
 			prep: func(_ kubeclient.Interface, _ kubeclient.Interface, karmadaClient karmadaclientset.Interface, _ *CommandUnjoinOption) error {
+				karmadaClient.(*fakekarmadaclient.Clientset).Fake.PrependReactor("get", "clusters", func(coretesting.Action) (bool, runtime.Object, error) {
+					return true, &clusterv1alpha1.Cluster{
+						ObjectMeta: metav1.ObjectMeta{
+							Name: "member1",
+						},
+						Spec: clusterv1alpha1.ClusterSpec{
+							SyncMode: clusterv1alpha1.Push,
+						},
+					}, nil
+				})
 				karmadaClient.(*fakekarmadaclient.Clientset).Fake.PrependReactor("delete", "clusters", func(coretesting.Action) (bool, runtime.Object, error) {
 					return true, nil, errors.New("unexpected error: encountered a network issue while deleting the clusters")
 				})

pkg/karmadactl/unregister/unregister.go

@@ -35,6 +35,7 @@ import (
 	"k8s.io/klog/v2"
 	"k8s.io/kubectl/pkg/util/templates"
 
+	clusterv1alpha1 "github.com/karmada-io/karmada/pkg/apis/cluster/v1alpha1"
 	"github.com/karmada-io/karmada/pkg/apis/cluster/validation"
 	karmadaclientset "github.com/karmada-io/karmada/pkg/generated/clientset/versioned"
 	"github.com/karmada-io/karmada/pkg/karmadactl/options"
@@ -310,6 +311,18 @@ func (j *CommandUnregisterOption) getKarmadaAgentConfig(agent *appsv1.Deployment
 
 // RunUnregisterCluster unregister the pull mode cluster from karmada.
 func (j *CommandUnregisterOption) RunUnregisterCluster() error {
+	target, err := j.ControlPlaneClient.ClusterV1alpha1().Clusters().Get(context.TODO(), j.ClusterName, metav1.GetOptions{})
+	if apierrors.IsNotFound(err) {
+		return fmt.Errorf("no cluster object %s found in karmada control Plane", j.ClusterName)
+	}
+	if err != nil {
+		klog.Errorf("Failed to get cluster object. cluster name: %s, error: %v", j.ClusterName, err)
+		return err
+	}
+	if target.Spec.SyncMode == clusterv1alpha1.Push {
+		return fmt.Errorf("cluster %s is a %s mode member cluster, please use command `unjoin` if you want to continue unjoining the cluster", j.ClusterName, target.Spec.SyncMode)
+	}
+
 	if j.DryRun {
 		return nil
 	}
@@ -318,7 +331,7 @@ func (j *CommandUnregisterOption) RunUnregisterCluster() error {
 	// 1. delete the work object from the Karmada control plane
 	// When deleting a cluster, the deletion triggers the removal of executionSpace, which can lead to the deletion of RBAC roles related to work.
 	// Therefore, the deletion of work should be performed before deleting the cluster.
-	err := cmdutil.EnsureWorksDeleted(j.ControlPlaneClient, names.GenerateExecutionSpaceName(j.ClusterName), j.Wait)
+	err = cmdutil.EnsureWorksDeleted(j.ControlPlaneClient, names.GenerateExecutionSpaceName(j.ClusterName), j.Wait)
 	if err != nil {
 		klog.Errorf("Failed to delete works object. cluster name: %s, error: %v", j.ClusterName, err)
 		return err

pkg/karmadactl/unregister/unregister_test.go

@@ -201,10 +201,22 @@ func TestCommandUnregisterOption_RunUnregisterCluster(t *testing.T) {
 		},
 		{
 			name: "cluster exist, but cluster resources not found",
-			clusterObject:    []runtime.Object{&clusterv1alpha1.Cluster{ObjectMeta: metav1.ObjectMeta{Name: clusterName}}},
+			clusterObject: []runtime.Object{&clusterv1alpha1.Cluster{
+				ObjectMeta: metav1.ObjectMeta{Name: clusterName},
+				Spec:       clusterv1alpha1.ClusterSpec{SyncMode: clusterv1alpha1.Pull}},
+			},
 			clusterResources: []runtime.Object{},
 			wantErr:          false,
 		},
+		{
+			name: "push mode member cluster",
+			clusterObject: []runtime.Object{&clusterv1alpha1.Cluster{
+				ObjectMeta: metav1.ObjectMeta{Name: clusterName},
+				Spec:       clusterv1alpha1.ClusterSpec{SyncMode: clusterv1alpha1.Push}},
+			},
+			clusterResources: []runtime.Object{},
+			wantErr:          true,
+		},
 	}
 
 	for _, tt := range tests {