kubeadm-upgrade: notify the user of manifest upgrade timeouts

cmd/kubeadm/app/cmd/upgrade/apply.go

@@ -42,8 +42,6 @@ import (
 )
 
 const (
-	upgradeManifestTimeout = 5 * time.Minute
-
 	defaultImagePullTimeout = 15 * time.Minute
 )
 

cmd/kubeadm/app/cmd/upgrade/common.go

@@ -178,7 +178,7 @@ func getWaiter(dryRun bool, client clientset.Interface) apiclient.Waiter {
 	if dryRun {
 		return dryrunutil.NewWaiter()
 	}
-	return apiclient.NewKubeWaiter(client, upgradeManifestTimeout, os.Stdout)
+	return apiclient.NewKubeWaiter(client, upgrade.UpgradeManifestTimeout, os.Stdout)
 }
 
 // InteractivelyConfirmUpgrade asks the user whether they _really_ want to upgrade.

cmd/kubeadm/app/phases/upgrade/staticpods.go

@@ -33,6 +33,11 @@ import (
 	"k8s.io/kubernetes/pkg/util/version"
 )
 
+const (
+	// UpgradeManifestTimeout is timeout of upgrading the static pod manifest
+	UpgradeManifestTimeout = 5 * time.Minute
+)
+
 // StaticPodPathManager is responsible for tracking the directories used in the static pod upgrade transition
 type StaticPodPathManager interface {
 	// MoveFile should move a file from oldPath to newPath
@@ -228,6 +233,7 @@ func upgradeComponent(component string, waiter apiclient.Waiter, pathMgr StaticP
 
 	if waitForComponentRestart {
 		fmt.Println("[upgrade/staticpods] Waiting for the kubelet to restart the component")
+		fmt.Printf("[upgrade/staticpods] This might take a minute or longer depending on the component/version gap (timeout %v\n", UpgradeManifestTimeout)
 
 		// Wait for the mirror Pod hash to change; otherwise we'll run into race conditions here when the kubelet hasn't had time to
 		// notice the removal of the Static Pod, leading to a false positive below where we check that the API endpoint is healthy