do a vcluster health check before starting informer

internal/tfhandler/tfhandler.go

@@ -59,6 +59,29 @@ func NewInformer(config *rest.Config, clientSetup tfoapiclient.ClientSetup, host
 		log.Fatal(err)
 	}
 
+	// A first time vcluster can take a minute to be available. Wait until the vcluster is available.
+	vclusterReady := false
+	for {
+		if !vclusterReady {
+			clusterHealthResult, err := clientset.Cluster(clientSetup.ClusterName).Health().Read(context.TODO(), nil)
+			if err != nil || !clusterHealthResult.IsSuccess {
+				time.Sleep(60 * time.Second)
+				continue
+			}
+			vclusterReady = true
+			log.Println("VCluster is ready!")
+		}
+
+		tfoHealthResult, err := clientset.Cluster(clientSetup.ClusterName).TFOHealth().Read(context.TODO(), nil)
+		if err != nil || !tfoHealthResult.IsSuccess {
+			time.Sleep(60 * time.Second)
+			continue
+		}
+		log.Println("TFO is ready!")
+		// Both vcluster and tfo are ready
+		break
+	}
+
 	tfhandler := informer{
 		ctx:         context.TODO(),
 		config:      config,
@@ -84,6 +107,8 @@ func (i informer) Run() {
 	stopCh := make(chan struct{})
 	defer close(stopCh)
 	i.backgroundQueueWorker()
+
+	// Start the informer
 	i.Start(stopCh)
 	<-stopCh
 	log.Println("Stopped informer")

pkg/tfoapiclient/client.go

@@ -224,6 +224,14 @@ func (c ClusterClient) SyncDependencies() crudResource {
 	return newCRUDResource(c.Clientset, fmt.Sprintf("%s/api/v1/cluster/%s/sync-dependencies", c.config.Host, c.clientName))
 }
 
+func (c ClusterClient) Health() crudResource {
+	return newCRUDResource(c.Clientset, fmt.Sprintf("%s/api/v1/cluster/%s/health", c.config.Host, c.clientName))
+}
+
+func (c ClusterClient) TFOHealth() crudResource {
+	return newCRUDResource(c.Clientset, fmt.Sprintf("%s/api/v1/cluster/%s/tfohealth", c.config.Host, c.clientName))
+}
+
 func newCRUDResource(c Clientset, url string) crudResource {
 	return crudResource{Clientset: c, url: url}
 }