fix some spelling error

cmd/kubeadm/app/phases/controlplane/manifests.go

@@ -116,10 +116,10 @@ func CreateStaticPodFiles(manifestDir string, cfg *kubeadmapi.ClusterConfigurati
 
 	// creates required static pod specs
 	for _, componentName := range componentNames {
-		// retrives the StaticPodSpec for given component
+		// retrieves the StaticPodSpec for given component
 		spec, exists := specs[componentName]
 		if !exists {
-			return errors.Errorf("couldn't retrive StaticPodSpec for %q", componentName)
+			return errors.Errorf("couldn't retrieve StaticPodSpec for %q", componentName)
 		}
 
 		// writes the StaticPodSpec to disk

cmd/kubeadm/app/phases/kubeconfig/kubeconfig.go

@@ -106,10 +106,10 @@ func createKubeConfigFiles(outDir string, cfg *kubeadmapi.InitConfiguration, kub
 	}
 
 	for _, kubeConfigFileName := range kubeConfigFileNames {
-		// retrives the KubeConfigSpec for given kubeConfigFileName
+		// retrieves the KubeConfigSpec for given kubeConfigFileName
 		spec, exists := specs[kubeConfigFileName]
 		if !exists {
-			return errors.Errorf("couldn't retrive KubeConfigSpec for %s", kubeConfigFileName)
+			return errors.Errorf("couldn't retrieve KubeConfigSpec for %s", kubeConfigFileName)
 		}
 
 		// builds the KubeConfig object

cmd/kubeadm/app/util/config/cluster.go

@@ -105,7 +105,7 @@ func getNodeRegistration(kubeconfigDir string, client clientset.Interface, nodeR
 		return errors.Wrap(err, "failed to get node name from kubelet config")
 	}
 
-	// gets the corresponding node and retrives attributes stored there.
+	// gets the corresponding node and retrieves attributes stored there.
 	node, err := client.CoreV1().Nodes().Get(nodeName, metav1.GetOptions{})
 	if err != nil {
 		return errors.Wrap(err, "failed to get corresponding node")