clustermesh enable: add enable-kvstoremesh flag

This commit extends the `cilium clustermesh enable` command with a new
flag which can be used to enable kvstoremesh (cilium/cilium#26083). The
new flag is supported only when using the new Helm mode, and requires
cilium >= 1.14 (it has no effect on earlier versions).

Signed-off-by: Marco Iorio <marco.iorio@isovalent.com>

clustermesh/clustermesh.go

@@ -479,6 +479,10 @@ type Parameters struct {
 	// EnableExternalWorkloads indicates whether externalWorkloads.enabled Helm value
 	// should be set to true. For Helm mode only.
 	EnableExternalWorkloads bool
+
+	// EnableKVStoreMesh indicates whether kvstoremesh should be enabled.
+	// For Helm mode only.
+	EnableKVStoreMesh bool
 }
 
 func (p Parameters) validateParams() error {
@@ -1901,6 +1905,11 @@ func generateEnableHelmValues(params Parameters, flavor k8s.Flavor) (map[string]
 			},
 		}
 
+	helmVals["clustermesh"].(map[string]interface{})["apiserver"].(map[string]interface{})["kvstoremesh"] =
+		map[string]interface{}{
+			"enabled": params.EnableKVStoreMesh,
+		}
+
 	return helmVals, nil
 }
 

internal/cli/cmd/clustermesh.go

@@ -367,6 +367,7 @@ func newCmdClusterMeshEnableWithHelm() *cobra.Command {
 	}
 
 	cmd.Flags().BoolVar(&params.EnableExternalWorkloads, "enable-external-workloads", false, "Enable support for external workloads, such as VMs")
+	cmd.Flags().BoolVar(&params.EnableKVStoreMesh, "enable-kvstoremesh", false, "Enable kvstoremesh, an extension which caches remote cluster information in the local kvstore (Cilium >=1.14 only)")
 	cmd.Flags().StringVar(&params.ServiceType, "service-type", "", "Type of Kubernetes service to expose control plane { LoadBalancer | NodePort | ClusterIP }")
 
 	return cmd