move registration feature gates to api, can be used by registration-o…

feature/feature.go

@@ -0,0 +1,58 @@
+package feature
+
+import (
+	"k8s.io/component-base/featuregate"
+)
+
+const (
+	// Every feature gate should add method here following this template:
+	//
+	// // owner: @username
+	// // alpha: v1.X
+	// MyFeature featuregate.Feature = "MyFeature"
+
+	// ClusterClaim will start a new controller in the spoke-agent to manage the cluster-claim
+	// resources in the managed cluster.
+	//
+	// The cluster-claim controller is majorly for collecting claims and updating claims field
+	// in managedcluster status. When it exceeds the limit specified by "--max-custom-cluster-claims",
+	// the extra claims will be truncated.
+	//
+	// If it is disabled, the user will see empty claims field in managedcluster status. The
+	// deployer who disable the feature may need to update claim field in managed cluster status
+	// itself to avoid impact to users.
+	ClusterClaim featuregate.Feature = "ClusterClaim"
+
+	// AddonManagement will start new controllers in the spoke-agent to manage the managed cluster addons
+	// registration and maintains the status of managed cluster addons through watching their leases.
+	AddonManagement featuregate.Feature = "AddonManagement"
+
+	// DefaultClusterSet will make registration hub controller to maintain a default cluster set. All clusters
+	// without clusterset label will be automatically added into the default cluster set by adding a label
+	// "cluster.open-cluster-management.io/clusterset=default" to the clusters.
+	DefaultClusterSet featuregate.Feature = "DefaultClusterSet"
+
+	// V1beta1CSRAPICompatibility will make the spoke registration agent to issue CSR requests
+	// via V1beta1 api, so that registration agent can still manage the certificate rotation for the
+	// ManagedCluster and  ManagedClusterAddon.
+	// Note that kubernetes release [1.12, 1.18)'s beta CSR api doesn't have the "signerName" field which
+	// means that all the approved CSR objects will be signed by the built-in CSR controller in
+	// kube-controller-manager.
+	V1beta1CSRAPICompatibility featuregate.Feature = "V1beta1CSRAPICompatibility"
+)
+
+// DefaultSpokeRegistrationFeatureGates consists of all known ocm-registration
+// feature keys for registration agent.  To add a new feature, define a key for it above and
+// add it here.
+var DefaultSpokeRegistrationFeatureGates = map[featuregate.Feature]featuregate.FeatureSpec{
+	ClusterClaim:               {Default: true, PreRelease: featuregate.Beta},
+	AddonManagement:            {Default: false, PreRelease: featuregate.Alpha},
+	V1beta1CSRAPICompatibility: {Default: false, PreRelease: featuregate.Alpha},
+}
+
+// DefaultHubRegistrationFeatureGates consists of all known ocm-registration
+// feature keys for registration hub controller.  To add a new feature, define a key for it above and
+// add it here.
+var DefaultHubRegistrationFeatureGates = map[featuregate.Feature]featuregate.FeatureSpec{
+	DefaultClusterSet: {Default: false, PreRelease: featuregate.Alpha},
+}

go.mod

@@ -12,6 +12,7 @@ require (
 	k8s.io/apimachinery v0.23.0
 	k8s.io/client-go v0.23.0
 	k8s.io/code-generator v0.23.0
+	k8s.io/component-base v0.23.0
 	k8s.io/klog/v2 v2.30.0
 	sigs.k8s.io/controller-runtime v0.11.1
 )