Issue 8433: add third party labels to data mover pods when the same labels exist in node-agent pods (#8487)

* issue 8433: add ask label to data mover pods

Signed-off-by: Lyndon-Li <lyonghui@vmware.com>

* check existence of the same label from node-agent

Signed-off-by: Lyndon-Li <lyonghui@vmware.com>

---------

Signed-off-by: Lyndon-Li <lyonghui@vmware.com>

pkg/controller/data_download_controller.go

@@ -47,7 +47,9 @@ import (
 	"github.com/vmware-tanzu/velero/pkg/datapath"
 	"github.com/vmware-tanzu/velero/pkg/exposer"
 	"github.com/vmware-tanzu/velero/pkg/metrics"
+	"github.com/vmware-tanzu/velero/pkg/nodeagent"
 	"github.com/vmware-tanzu/velero/pkg/uploader"
+	"github.com/vmware-tanzu/velero/pkg/util"
 	"github.com/vmware-tanzu/velero/pkg/util/kube"
 )
 
@@ -178,6 +180,15 @@ func (r *DataDownloadReconciler) Reconcile(ctx context.Context, req ctrl.Request
 		}
 
 		hostingPodLabels := map[string]string{velerov1api.DataDownloadLabel: dd.Name}
+		for _, k := range util.ThirdPartyLabels {
+			if v, err := nodeagent.GetLabelValue(ctx, r.kubeClient, dd.Namespace, k); err != nil {
+				if err != nodeagent.ErrNodeAgentLabelNotFound {
+					log.WithError(err).Warnf("Failed to check node-agent label, skip adding host pod label %s", k)
+				}
+			} else {
+				hostingPodLabels[k] = v
+			}
+		}
 
 		// Expose() will trigger to create one pod whose volume is restored by a given volume snapshot,
 		// but the pod maybe is not in the same node of the current controller, so we need to return it here.

pkg/controller/data_upload_controller.go

@@ -50,6 +50,7 @@ import (
 	"github.com/vmware-tanzu/velero/pkg/metrics"
 	"github.com/vmware-tanzu/velero/pkg/nodeagent"
 	"github.com/vmware-tanzu/velero/pkg/uploader"
+	"github.com/vmware-tanzu/velero/pkg/util"
 	"github.com/vmware-tanzu/velero/pkg/util/kube"
 )
 
@@ -810,11 +811,22 @@ func (r *DataUploadReconciler) setupExposeParam(du *velerov2alpha1api.DataUpload
 			accessMode = exposer.AccessModeBlock
 		}
 
+		hostingPodLabels := map[string]string{velerov1api.DataUploadLabel: du.Name}
+		for _, k := range util.ThirdPartyLabels {
+			if v, err := nodeagent.GetLabelValue(context.Background(), r.kubeClient, du.Namespace, k); err != nil {
+				if err != nodeagent.ErrNodeAgentLabelNotFound {
+					r.logger.WithError(err).Warnf("Failed to check node-agent label, skip adding host pod label %s", k)
+				}
+			} else {
+				hostingPodLabels[k] = v
+			}
+		}
+
 		return &exposer.CSISnapshotExposeParam{
 			SnapshotName:     du.Spec.CSISnapshot.VolumeSnapshot,
 			SourceNamespace:  du.Spec.SourceNamespace,
 			StorageClass:     du.Spec.CSISnapshot.StorageClass,
-			HostingPodLabels: map[string]string{velerov1api.DataUploadLabel: du.Name},
+			HostingPodLabels: hostingPodLabels,
 			AccessMode:       accessMode,
 			OperationTimeout: du.Spec.OperationTimeout.Duration,
 			ExposeTimeout:    r.preparingTimeout,

pkg/nodeagent/node_agent.go

@@ -38,7 +38,8 @@ const (
 )
 
 var (
-	ErrDaemonSetNotFound = errors.New("daemonset not found")
+	ErrDaemonSetNotFound      = errors.New("daemonset not found")
+	ErrNodeAgentLabelNotFound = errors.New("node-agent label not found")
 )
 
 type LoadConcurrency struct {
@@ -161,3 +162,21 @@ func GetConfigs(ctx context.Context, namespace string, kubeClient kubernetes.Int
 
 	return configs, nil
 }
+
+func GetLabelValue(ctx context.Context, kubeClient kubernetes.Interface, namespace string, key string) (string, error) {
+	ds, err := kubeClient.AppsV1().DaemonSets(namespace).Get(ctx, daemonSet, metav1.GetOptions{})
+	if err != nil {
+		return "", errors.Wrap(err, "error getting node-agent daemonset")
+	}
+
+	if ds.Spec.Template.Labels == nil {
+		return "", ErrNodeAgentLabelNotFound
+	}
+
+	val, found := ds.Spec.Template.Labels[key]
+	if !found {
+		return "", ErrNodeAgentLabelNotFound
+	}
+
+	return val, nil
+}

pkg/nodeagent/node_agent_test.go

@@ -331,3 +331,132 @@ func TestGetConfigs(t *testing.T) {
 		})
 	}
 }
+
+func TestGetLabelValue(t *testing.T) {
+	daemonSet := &appsv1.DaemonSet{
+		ObjectMeta: metav1.ObjectMeta{
+			Namespace: "fake-ns",
+			Name:      "node-agent",
+		},
+		TypeMeta: metav1.TypeMeta{
+			Kind: "DaemonSet",
+		},
+	}
+
+	daemonSetWithOtherLabel := &appsv1.DaemonSet{
+		ObjectMeta: metav1.ObjectMeta{
+			Namespace: "fake-ns",
+			Name:      "node-agent",
+		},
+		TypeMeta: metav1.TypeMeta{
+			Kind: "DaemonSet",
+		},
+		Spec: appsv1.DaemonSetSpec{
+			Template: corev1.PodTemplateSpec{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						"fake-other-label": "fake-value-1",
+					},
+				},
+			},
+		},
+	}
+
+	daemonSetWithLabel := &appsv1.DaemonSet{
+		ObjectMeta: metav1.ObjectMeta{
+			Namespace: "fake-ns",
+			Name:      "node-agent",
+		},
+		TypeMeta: metav1.TypeMeta{
+			Kind: "DaemonSet",
+		},
+		Spec: appsv1.DaemonSetSpec{
+			Template: corev1.PodTemplateSpec{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						"fake-label": "fake-value-2",
+					},
+				},
+			},
+		},
+	}
+
+	daemonSetWithEmptyLabel := &appsv1.DaemonSet{
+		ObjectMeta: metav1.ObjectMeta{
+			Namespace: "fake-ns",
+			Name:      "node-agent",
+		},
+		TypeMeta: metav1.TypeMeta{
+			Kind: "DaemonSet",
+		},
+		Spec: appsv1.DaemonSetSpec{
+			Template: corev1.PodTemplateSpec{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						"fake-label": "",
+					},
+				},
+			},
+		},
+	}
+
+	tests := []struct {
+		name          string
+		kubeClientObj []runtime.Object
+		namespace     string
+		expectedValue string
+		expectErr     string
+	}{
+		{
+			name:      "ds get error",
+			namespace: "fake-ns",
+			expectErr: "error getting node-agent daemonset: daemonsets.apps \"node-agent\" not found",
+		},
+		{
+			name:      "no label",
+			namespace: "fake-ns",
+			kubeClientObj: []runtime.Object{
+				daemonSet,
+			},
+			expectErr: ErrNodeAgentLabelNotFound.Error(),
+		},
+		{
+			name:      "no expecting label",
+			namespace: "fake-ns",
+			kubeClientObj: []runtime.Object{
+				daemonSetWithOtherLabel,
+			},
+			expectErr: ErrNodeAgentLabelNotFound.Error(),
+		},
+		{
+			name:      "expecting label",
+			namespace: "fake-ns",
+			kubeClientObj: []runtime.Object{
+				daemonSetWithLabel,
+			},
+			expectedValue: "fake-value-2",
+		},
+		{
+			name:      "expecting empty label",
+			namespace: "fake-ns",
+			kubeClientObj: []runtime.Object{
+				daemonSetWithEmptyLabel,
+			},
+			expectedValue: "",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			fakeKubeClient := fake.NewSimpleClientset(test.kubeClientObj...)
+
+			value, err := GetLabelValue(context.TODO(), fakeKubeClient, test.namespace, "fake-label")
+			if test.expectErr == "" {
+				assert.NoError(t, err)
+				assert.Equal(t, test.expectedValue, value)
+			} else {
+				assert.EqualError(t, err, test.expectErr)
+			}
+		})
+	}
+}

pkg/util/third_party.go

@@ -0,0 +1,21 @@
+/*
+Copyright the Velero contributors.
+
+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.
+*/
+
+package util
+
+var ThirdPartyLabels []string = []string{
+	"azure.workload.identity/use",
+}