diff --git a/core/internal/kubernetes/clusternet/clusternet.go b/core/internal/kubernetes/clusternet/clusternet.go
index e41ba8a..bb1f183 100644
--- a/core/internal/kubernetes/clusternet/clusternet.go
+++ b/core/internal/kubernetes/clusternet/clusternet.go
@@ -202,11 +202,17 @@
 // Run runs the ClusterNet service. See package description for what it does.
 func (s *Service) Run(ctx context.Context) error {
 	logger := supervisor.Logger(ctx)
+	s.logger = logger
 
 	wgClient, err := wgctrl.New()
 	if err != nil {
 		return fmt.Errorf("failed to connect to netlink's WireGuard config endpoint: %w", err)
 	}
+	s.wgClient = wgClient
+
+	if err := s.ensureOnDiskKey(); err != nil {
+		return fmt.Errorf("failed to ensure on-disk key: %w", err)
+	}
 
 	wgInterface := &Wireguard{LinkAttrs: netlink.LinkAttrs{Name: clusterNetDeviceName, Flags: net.FlagUp}}
 	if err := netlink.LinkAdd(wgInterface); err != nil {