use kube-system ns uid as cluster id.

Signed-off-by: yy <[email protected]>

controllers/license/cmd/manager/main.go

@@ -35,6 +35,7 @@ import (
 	accountv1 "github.com/labring/sealos/controllers/account/api/v1"
 	licensev1 "github.com/labring/sealos/controllers/license/api/v1"
 	"github.com/labring/sealos/controllers/license/internal/controller"
+	utilid "github.com/labring/sealos/controllers/license/internal/util/clusterid"
 	"github.com/labring/sealos/controllers/license/internal/util/database"
 	//+kubebuilder:scaffold:imports
 )
@@ -101,7 +102,14 @@ func main() {
 	}
 	defer db.Disconnect(context.Background())
 
-	if err = (&controller.LicenseReconciler{ClusterID: os.Getenv("CLUSTER_ID")}).SetupWithManager(mgr, db); err != nil {
+	clusterID, err := utilid.GetClusterID(context.Background(), mgr.GetClient())
+	if err != nil {
+		setupLog.Error(err, "unable to get cluster id")
+		os.Exit(1)
+	}
+	setupLog.Info("cluster id", "id", clusterID)
+
+	if err = (&controller.LicenseReconciler{ClusterID: clusterID}).SetupWithManager(mgr, db); err != nil {
 		setupLog.Error(err, "unable to create controller", "controller", "License")
 		os.Exit(1)
 	}

controllers/license/internal/util/clusterid/cluster_id.go

@@ -1,24 +1,17 @@
 package clusterid
 
-//import (
-//	"context"
-//	"os"
-//
-//	"github.com/labring/sealos/controllers/license/internal/util/database"
-//)
-//
-//func GetClusterID(ctx context.Context, db *database.DataBase) (string, error) {
-//	// TODO get cluster id from database
-//	//id, err := db.GetClusterID(ctx)
-//	//if errors.Is(err, mongo.ErrNoDocuments) {
-//	//	// if cluster id is not set, set it
-//	//	envID := os.Getenv("CLUSTER_ID")
-//	//	if envID == "" {
-//	//		return "", errors.New("cluster id not set")
-//	//	}
-//	//	if err := db.StoreClusterID(ctx, os.Getenv("CLUSTER_ID")); err != nil {
-//	//		return db.GetClusterID(ctx)
-//	//	}
-//	//}
-//	return os.Getenv("CLUSTER_ID"), nil
-//}
+import (
+	"context"
+
+	corev1 "k8s.io/api/core/v1"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+)
+
+func GetClusterID(ctx context.Context, c client.Client) (string, error) {
+	ns := &corev1.Namespace{}
+	err := c.Get(ctx, client.ObjectKey{Name: "kube-system"}, ns)
+	if err != nil {
+		return "", err
+	}
+	return string(ns.UID), nil
+}