operator: move control plane label to constants

operators/constellation-node-operator/controllers/BUILD.bazel

@@ -81,6 +81,7 @@ go_test(
         "//3rdparty/node-maintenance-operator/api/v1beta1",
         "//internal/constants",
         "//operators/constellation-node-operator/api/v1alpha1",
+        "//operators/constellation-node-operator/internal/constants",
         "@com_github_onsi_ginkgo_v2//:ginkgo",
         "@com_github_onsi_gomega//:gomega",
         "@com_github_stretchr_testify//assert",

operators/constellation-node-operator/internal/constants/constants.go

@@ -19,4 +19,6 @@ const (
 	PlaceholderControlPlaneScalingGroupName = "control-planes-id"
 	// PlaceholderWorkerScalingGroupName name of the worker scaling group used if upgrades are not yet supported.
 	PlaceholderWorkerScalingGroupName = "workers-id"
+	// ControlPlaneRoleLabel label used to identify control plane nodes.
+	ControlPlaneRoleLabel = "node-role.kubernetes.io/control-plane"
 )

operators/constellation-node-operator/internal/controlplane/BUILD.bazel

@@ -18,6 +18,7 @@ go_test(
     srcs = ["controlplane_test.go"],
     embed = [":controlplane"],
     deps = [
+        "//operators/constellation-node-operator/internal/constants",
         "@com_github_stretchr_testify//assert",
         "@com_github_stretchr_testify//require",
         "@io_k8s_api//core/v1:core",

operators/constellation-node-operator/internal/controlplane/controlplane_test.go

@@ -11,6 +11,7 @@ import (
 	"errors"
 	"testing"
 
+	"github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/internal/constants"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	corev1 "k8s.io/api/core/v1"
@@ -29,7 +30,7 @@ func TestListControlPlaneIPs(t *testing.T) {
 			nodes: []corev1.Node{
 				{
 					ObjectMeta: metav1.ObjectMeta{
-						Labels: map[string]string{"node-role.kubernetes.io/control-plane": ""},
+						Labels: map[string]string{constants.ControlPlaneRoleLabel: ""},
 					},
 					Status: corev1.NodeStatus{Addresses: []corev1.NodeAddress{{
 						Type:    corev1.NodeInternalIP,

operators/constellation-node-operator/internal/etcd/BUILD.bazel

@@ -19,6 +19,7 @@ go_test(
     srcs = ["etcd_test.go"],
     embed = [":etcd"],
     deps = [
+        "//operators/constellation-node-operator/internal/constants",
         "@com_github_stretchr_testify//assert",
         "@com_github_stretchr_testify//require",
         "@io_etcd_go_etcd_api_v3//etcdserverpb",

operators/constellation-node-operator/internal/etcd/etcd_test.go

@@ -11,6 +11,7 @@ import (
 	"errors"
 	"testing"
 
+	"github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/internal/constants"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	pb "go.etcd.io/etcd/api/v3/etcdserverpb"
@@ -124,7 +125,7 @@ func TestGetInitialEndpoints(t *testing.T) {
 			nodes: []corev1.Node{
 				{
 					ObjectMeta: metav1.ObjectMeta{
-						Labels: map[string]string{"node-role.kubernetes.io/control-plane": ""},
+						Labels: map[string]string{constants.ControlPlaneRoleLabel: ""},
 					},
 					Status: corev1.NodeStatus{Addresses: []corev1.NodeAddress{{
 						Type:    corev1.NodeInternalIP,

operators/constellation-node-operator/internal/node/BUILD.bazel

@@ -8,6 +8,7 @@ go_library(
     visibility = ["//operators/constellation-node-operator:__subpackages__"],
     deps = [
         "//operators/constellation-node-operator/api/v1alpha1",
+        "//operators/constellation-node-operator/internal/constants",
         "@io_k8s_api//core/v1:core",
     ],
 )
@@ -18,6 +19,7 @@ go_test(
     embed = [":node"],
     deps = [
         "//operators/constellation-node-operator/api/v1alpha1",
+        "//operators/constellation-node-operator/internal/constants",
         "@com_github_stretchr_testify//assert",
         "@com_github_stretchr_testify//require",
         "@io_k8s_api//core/v1:core",

operators/constellation-node-operator/internal/node/node.go

@@ -11,11 +11,10 @@ import (
 	"regexp"
 
 	updatev1alpha1 "github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/api/v1alpha1"
+	"github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/internal/constants"
 	corev1 "k8s.io/api/core/v1"
 )
 
-const controlPlaneRoleLabel = "node-role.kubernetes.io/control-plane"
-
 var reservedHostRegex = regexp.MustCompile(`^(.+\.|)(kubernetes|k8s)\.io(/.*)?$`)
 
 // Ready checks if a kubernetes node has the `NodeReady` condition set to true.
@@ -40,7 +39,7 @@ func VPCIP(node *corev1.Node) (string, error) {
 
 // IsControlPlaneNode returns true if the node is a control plane node.
 func IsControlPlaneNode(node *corev1.Node) bool {
-	_, ok := node.Labels[controlPlaneRoleLabel]
+	_, ok := node.Labels[constants.ControlPlaneRoleLabel]
 	return ok
 }
 

operators/constellation-node-operator/internal/node/node_test.go

@@ -10,6 +10,7 @@ import (
 	"testing"
 
 	updatev1alpha1 "github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/api/v1alpha1"
+	"github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/internal/constants"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	corev1 "k8s.io/api/core/v1"
@@ -69,7 +70,7 @@ func TestIsControlPlaneNode(t *testing.T) {
 		"node with control-plane role label": {
 			node: corev1.Node{
 				ObjectMeta: metav1.ObjectMeta{
-					Labels: map[string]string{controlPlaneRoleLabel: ""},
+					Labels: map[string]string{constants.ControlPlaneRoleLabel: ""},
 				},
 			},
 			wantControlPlane: true,