Merge pull request #9450 from k8s-infra-cherrypick-robot/cherry-pick-…

…9342-to-release-1.4

[release-1.4] 🐛 Fix KCP Controller reconcile always return error when workload cluster is unreachable

controlplane/kubeadm/internal/cluster.go

@@ -104,7 +104,7 @@ func (m *Management) GetWorkloadCluster(ctx context.Context, clusterKey client.O
 	// TODO(chuckha): memoize this function. The workload client only exists as long as a reconciliation loop.
 	restConfig, err := remote.RESTConfig(ctx, KubeadmControlPlaneControllerName, m.Client, clusterKey)
 	if err != nil {
-		return nil, err
+		return nil, &RemoteClusterConnectionError{Name: clusterKey.String(), Err: err}
 	}
 	restConfig.Timeout = 30 * time.Second
 
@@ -114,12 +114,12 @@ func (m *Management) GetWorkloadCluster(ctx context.Context, clusterKey client.O
 
 	c, err := m.Tracker.GetClient(ctx, clusterKey)
 	if err != nil {
-		return nil, err
+		return nil, &RemoteClusterConnectionError{Name: clusterKey.String(), Err: err}
 	}
 
 	clientConfig, err := m.Tracker.GetRESTConfig(ctx, clusterKey)
 	if err != nil {
-		return nil, err
+		return nil, &RemoteClusterConnectionError{Name: clusterKey.String(), Err: err}
 	}
 
 	// Make sure we use the same CA and Host as the client.