cloud initialize node in external cloud controller

cmd/cloud-controller-manager/app/options/options.go

@@ -37,6 +37,9 @@ type CloudControllerManagerServer struct {
 
 	Master     string
 	Kubeconfig string
+
+	// NodeStatusUpdateFrequency is the freuency at which the controller updates nodes' status
+	NodeStatusUpdateFrequency metav1.Duration
 }
 
 // NewCloudControllerManagerServer creates a new ExternalCMServer with a default config.
@@ -56,6 +59,7 @@ func NewCloudControllerManagerServer() *CloudControllerManagerServer {
 			LeaderElection:          leaderelection.DefaultLeaderElectionConfiguration(),
 			ControllerStartInterval: metav1.Duration{Duration: 0 * time.Second},
 		},
+		NodeStatusUpdateFrequency: metav1.Duration{Duration: 5 * time.Minute},
 	}
 	s.LeaderElection.LeaderElect = true
 	return &s
@@ -70,6 +74,7 @@ func (s *CloudControllerManagerServer) AddFlags(fs *pflag.FlagSet) {
 	fs.DurationVar(&s.MinResyncPeriod.Duration, "min-resync-period", s.MinResyncPeriod.Duration, "The resync period in reflectors will be random between MinResyncPeriod and 2*MinResyncPeriod")
 	fs.DurationVar(&s.NodeMonitorPeriod.Duration, "node-monitor-period", s.NodeMonitorPeriod.Duration,
 		"The period for syncing NodeStatus in NodeController.")
+	fs.DurationVar(&s.NodeStatusUpdateFrequency.Duration, "node-status-update-frequency", s.NodeStatusUpdateFrequency.Duration, "Specifies how often the controller updates nodes' status.")
 	fs.StringVar(&s.ServiceAccountKeyFile, "service-account-private-key-file", s.ServiceAccountKeyFile, "Filename containing a PEM-encoded private RSA or ECDSA key used to sign service account tokens.")
 	fs.BoolVar(&s.UseServiceAccountCredentials, "use-service-account-credentials", s.UseServiceAccountCredentials, "If true, use individual service account credentials for each controller.")
 	fs.DurationVar(&s.RouteReconciliationPeriod.Duration, "route-reconciliation-period", s.RouteReconciliationPeriod.Duration, "The period for reconciling routes created for Nodes by cloud provider.")