Merge pull request kubernetes#77719 from feiskyer/fix-service-tag

Fix some service tags not supported issues for Azure LoadBalancer service

Author: k8s-ci-robot

staging/src/k8s.io/legacy-cloud-providers/azure/azure_loadbalancer.go

@@ -74,6 +74,7 @@ const (
 
 	// ServiceAnnotationAllowedServiceTag is the annotation used on the service
 	// to specify a list of allowed service tags separated by comma
+	// Refer https://docs.microsoft.com/en-us/azure/virtual-network/security-overview#service-tags for all supported service tags.
 	ServiceAnnotationAllowedServiceTag = "service.beta.kubernetes.io/azure-allowed-service-tags"
 
 	// ServiceAnnotationLoadBalancerIdleTimeout is the annotation used on the service
@@ -90,13 +91,6 @@ const (
 	clusterNameKey = "kubernetes-cluster-name"
 )
 
-var (
-	// supportedServiceTags holds a list of supported service tags on Azure.
-	// Refer https://docs.microsoft.com/en-us/azure/virtual-network/security-overview#service-tags for more information.
-	supportedServiceTags = sets.NewString("VirtualNetwork", "VIRTUAL_NETWORK", "AzureLoadBalancer", "AZURE_LOADBALANCER",
-		"Internet", "INTERNET", "AzureTrafficManager", "Storage", "Sql")
-)
-
 // GetLoadBalancer returns whether the specified load balancer exists, and
 // if so, what its status is.
 func (az *Cloud) GetLoadBalancer(ctx context.Context, clusterName string, service *v1.Service) (status *v1.LoadBalancerStatus, exists bool, err error) {
@@ -1028,10 +1022,7 @@ func (az *Cloud) reconcileSecurityGroup(clusterName string, service *v1.Service,
 	if err != nil {
 		return nil, err
 	}
-	serviceTags, err := getServiceTags(service)
-	if err != nil {
-		return nil, err
-	}
+	serviceTags := getServiceTags(service)
 	var sourceAddressPrefixes []string
 	if (sourceRanges == nil || servicehelpers.IsAllowAll(sourceRanges)) && len(serviceTags) == 0 {
 		if !requiresInternalLoadBalancer(service) {
@@ -1609,24 +1600,25 @@ func useSharedSecurityRule(service *v1.Service) bool {
 	return false
 }
 
-func getServiceTags(service *v1.Service) ([]string, error) {
+func getServiceTags(service *v1.Service) []string {
+	if service == nil {
+		return nil
+	}
+
 	if serviceTags, found := service.Annotations[ServiceAnnotationAllowedServiceTag]; found {
+		result := []string{}
 		tags := strings.Split(strings.TrimSpace(serviceTags), ",")
 		for _, tag := range tags {
-			// Storage and Sql service tags support setting regions with suffix ".Region"
-			if strings.HasPrefix(tag, "Storage.") || strings.HasPrefix(tag, "Sql.") {
-				continue
-			}
-
-			if !supportedServiceTags.Has(tag) {
-				return nil, fmt.Errorf("only %q are allowed in service tags", supportedServiceTags.List())
+			serviceTag := strings.TrimSpace(tag)
+			if serviceTag != "" {
+				result = append(result, serviceTag)
 			}
 		}
 
-		return tags, nil
+		return result
 	}
 
-	return nil, nil
+	return nil
 }
 
 func serviceOwnsPublicIP(pip *network.PublicIPAddress, clusterName, serviceName string) bool {

staging/src/k8s.io/legacy-cloud-providers/azure/azure_loadbalancer_test.go

@@ -447,3 +447,60 @@ func TestServiceOwnsPublicIP(t *testing.T) {
 		assert.Equal(t, owns, c.expected, "TestCase[%d]: %s", i, c.desc)
 	}
 }
+
+func TestGetServiceTags(t *testing.T) {
+	tests := []struct {
+		desc     string
+		service  *v1.Service
+		expected []string
+	}{
+		{
+			desc:     "nil should be returned when service is nil",
+			service:  nil,
+			expected: nil,
+		},
+		{
+			desc:     "nil should be returned when service has no annotations",
+			service:  &v1.Service{},
+			expected: nil,
+		},
+		{
+			desc: "single tag should be returned when service has set one annotations",
+			service: &v1.Service{
+				ObjectMeta: metav1.ObjectMeta{
+					Annotations: map[string]string{
+						ServiceAnnotationAllowedServiceTag: "tag1",
+					},
+				},
+			},
+			expected: []string{"tag1"},
+		},
+		{
+			desc: "multiple tags should be returned when service has set multi-annotations",
+			service: &v1.Service{
+				ObjectMeta: metav1.ObjectMeta{
+					Annotations: map[string]string{
+						ServiceAnnotationAllowedServiceTag: "tag1, tag2",
+					},
+				},
+			},
+			expected: []string{"tag1", "tag2"},
+		},
+		{
+			desc: "correct tags should be returned when comma or spaces are included in the annotations",
+			service: &v1.Service{
+				ObjectMeta: metav1.ObjectMeta{
+					Annotations: map[string]string{
+						ServiceAnnotationAllowedServiceTag: ", tag1, ",
+					},
+				},
+			},
+			expected: []string{"tag1"},
+		},
+	}
+
+	for i, c := range tests {
+		tags := getServiceTags(c.service)
+		assert.Equal(t, tags, c.expected, "TestCase[%d]: %s", i, c.desc)
+	}
+}