Add option for global NodeBalancer tags (Closes #220)

cloud/linode/cloud.go

@@ -42,6 +42,7 @@ var Options struct {
 	BGPNodeSelector       string
 	IpHolderSuffix        string
 	LinodeExternalNetwork *net.IPNet
+	NodeBalancerTags      []string
 }
 
 type linodeCloud struct {

cloud/linode/loadbalancers.go

@@ -612,6 +612,8 @@ func (l *loadbalancers) GetLoadBalancerTags(_ context.Context, clusterName strin
 		tags = append(tags, clusterName)
 	}
 
+	tags = append(tags, Options.NodeBalancerTags...)
+
 	tagStr, ok := service.GetAnnotations()[annotations.AnnLinodeLoadBalancerTags]
 	if ok {
 		return append(tags, strings.Split(tagStr, ",")...)

cloud/linode/loadbalancers_test.go

@@ -150,6 +150,10 @@ func TestCCMLoadBalancers(t *testing.T) {
 			name: "Create Load Balancer With Invalid Firewall ACL - NO Allow Or Deny",
 			f:    testCreateNodeBalanceWithNoAllowOrDenyList,
 		},
+		{
+			name: "Create Load Balancer With Global Tags set",
+			f:    testCreateNodeBalancerWithGlobalTags,
+		},
 		{
 			name: "Update Load Balancer - Add Node",
 			f:    testUpdateLoadBalancerAddNode,
@@ -274,7 +278,7 @@ func stubService(fake *fake.Clientset, service *v1.Service) {
 	_, _ = fake.CoreV1().Services("").Create(context.TODO(), service, metav1.CreateOptions{})
 }
 
-func testCreateNodeBalancer(t *testing.T, client *linodego.Client, _ *fakeAPI, annMap map[string]string) error {
+func testCreateNodeBalancer(t *testing.T, client *linodego.Client, _ *fakeAPI, annMap map[string]string, expectedTags []string) error {
 	svc := &v1.Service{
 		ObjectMeta: metav1.ObjectMeta{
 			Name: randString(),
@@ -341,7 +345,9 @@ func testCreateNodeBalancer(t *testing.T, client *linodego.Client, _ *fakeAPI, a
 		t.Logf("actual: %v", nb.ClientConnThrottle)
 	}
 
-	expectedTags := []string{"linodelb", "fake", "test", "yolo"}
+	if len(expectedTags) == 0 {
+		expectedTags = []string{"linodelb", "fake", "test", "yolo"}
+	}
 	if !reflect.DeepEqual(nb.Tags, expectedTags) {
 		t.Error("unexpected Tags")
 		t.Logf("expected: %v", expectedTags)
@@ -366,7 +372,7 @@ func testCreateNodeBalancer(t *testing.T, client *linodego.Client, _ *fakeAPI, a
 }
 
 func testCreateNodeBalancerWithOutFirewall(t *testing.T, client *linodego.Client, f *fakeAPI) {
-	err := testCreateNodeBalancer(t, client, f, nil)
+	err := testCreateNodeBalancer(t, client, f, nil, nil)
 	if err != nil {
 		t.Fatalf("expected a nil error, got %v", err)
 	}
@@ -377,7 +383,7 @@ func testCreateNodeBalanceWithNoAllowOrDenyList(t *testing.T, client *linodego.C
 		annotations.AnnLinodeCloudFirewallACL: `{}`,
 	}
 
-	err := testCreateNodeBalancer(t, client, f, annotations)
+	err := testCreateNodeBalancer(t, client, f, annotations, nil)
 	if err == nil || !stderrors.Is(err, firewall.ErrInvalidFWConfig) {
 		t.Fatalf("expected a %v error, got %v", firewall.ErrInvalidFWConfig, err)
 	}
@@ -395,7 +401,7 @@ func testCreateNodeBalanceWithBothAllowOrDenyList(t *testing.T, client *linodego
 		}`,
 	}
 
-	err := testCreateNodeBalancer(t, client, f, annotations)
+	err := testCreateNodeBalancer(t, client, f, annotations, nil)
 	if err == nil || !stderrors.Is(err, firewall.ErrInvalidFWConfig) {
 		t.Fatalf("expected a %v error, got %v", firewall.ErrInvalidFWConfig, err)
 	}
@@ -410,7 +416,7 @@ func testCreateNodeBalancerWithAllowList(t *testing.T, client *linodego.Client,
 		}`,
 	}
 
-	err := testCreateNodeBalancer(t, client, f, annotations)
+	err := testCreateNodeBalancer(t, client, f, annotations, nil)
 	if err != nil {
 		t.Fatalf("expected a non-nil error, got %v", err)
 	}
@@ -425,7 +431,7 @@ func testCreateNodeBalancerWithDenyList(t *testing.T, client *linodego.Client, f
 		}`,
 	}
 
-	err := testCreateNodeBalancer(t, client, f, annotations)
+	err := testCreateNodeBalancer(t, client, f, annotations, nil)
 	if err != nil {
 		t.Fatalf("expected a non-nil error, got %v", err)
 	}
@@ -435,7 +441,7 @@ func testCreateNodeBalancerWithFirewall(t *testing.T, client *linodego.Client, f
 	annotations := map[string]string{
 		annotations.AnnLinodeCloudFirewallID: "123",
 	}
-	err := testCreateNodeBalancer(t, client, f, annotations)
+	err := testCreateNodeBalancer(t, client, f, annotations, nil)
 	if err != nil {
 		t.Fatalf("expected a nil error, got %v", err)
 	}
@@ -446,12 +452,25 @@ func testCreateNodeBalancerWithInvalidFirewall(t *testing.T, client *linodego.Cl
 		annotations.AnnLinodeCloudFirewallID: "qwerty",
 	}
 	expectedError := "strconv.Atoi: parsing \"qwerty\": invalid syntax"
-	err := testCreateNodeBalancer(t, client, f, annotations)
+	err := testCreateNodeBalancer(t, client, f, annotations, nil)
 	if err.Error() != expectedError {
 		t.Fatalf("expected a %s error, got %v", expectedError, err)
 	}
 }
 
+func testCreateNodeBalancerWithGlobalTags(t *testing.T, client *linodego.Client, f *fakeAPI) {
+	original := Options.NodeBalancerTags
+	defer func() {
+		Options.NodeBalancerTags = original
+	}()
+	Options.NodeBalancerTags = []string{"foobar"}
+	expectedTags := []string{"linodelb", "foobar", "fake", "test", "yolo"}
+	err := testCreateNodeBalancer(t, client, f, nil, expectedTags)
+	if err != nil {
+		t.Fatalf("expected a nil error, got %v", err)
+	}
+}
+
 func testUpdateLoadBalancerAddNode(t *testing.T, client *linodego.Client, f *fakeAPI) {
 	svc := &v1.Service{
 		ObjectMeta: metav1.ObjectMeta{

deploy/chart/templates/daemonset.yaml

@@ -65,6 +65,9 @@ spec:
             {{- end}}
             - --load-balancer-type={{ required "A valid .Values.sharedIPLoadBalancing.loadBalancerType is required for shared IP load-balancing" .Values.sharedIPLoadBalancing.loadBalancerType }}
             {{- end }}
+            {{- if .Values.nodeBalancerTags }}
+            - --nodebalancer-tags={{ join " " .Values.nodeBalancerTags }}
+            {{- end }}
           volumeMounts:
             - mountPath: /etc/kubernetes
               name: k8s

deploy/chart/values.yaml

@@ -64,6 +64,9 @@ env:
 #  - name: EXAMPLE_ENV_VAR
 #    value: "true"
 
+# Linode tags to apply to all NodeBalancers
+nodeBalancerTags: []
+
 # This section adds the ability to pass volumes to the CCM DaemonSet
 volumes:
 #  - name: test-volume

main.go

@@ -86,6 +86,7 @@ func main() {
 	command.Flags().StringVar(&linode.Options.LoadBalancerType, "load-balancer-type", "nodebalancer", "configures which type of load-balancing to use for LoadBalancer Services (options: nodebalancer, cilium-bgp)")
 	command.Flags().StringVar(&linode.Options.BGPNodeSelector, "bgp-node-selector", "", "node selector to use to perform shared IP fail-over with BGP (e.g. cilium-bgp-peering=true")
 	command.Flags().StringVar(&linode.Options.IpHolderSuffix, "ip-holder-suffix", "", "suffix to append to the ip holder name when using shared IP fail-over with BGP (e.g. ip-holder-suffix=my-cluster-name")
+	command.Flags().StringSliceVar(&linode.Options.NodeBalancerTags, "nodebalancer-tags", []string{}, "Linode tags to apply to all NodeBalancers")
 
 	// Set static flags
 	command.Flags().VisitAll(func(fl *pflag.Flag) {