Introduce some plumbing which makes it possible to specify which ingress

test/e2e/framework/nodes_util.go

@@ -74,17 +74,21 @@ func etcdUpgradeGCE(target_storage, target_version string) error {
 }
 
 func ingressUpgradeGCE(isUpgrade bool) error {
-	// Flip glbc image from latest release image to HEAD to simulate an upgrade.
-	// Flip from HEAD to latest release image to simulate a downgrade.
-	// Kubelet should restart glbc automatically.
 	var command string
 	if isUpgrade {
-		// Upgrade
-		command = "sudo sed -i -re 's/(image:)(.*)/\\1 gcr.io\\/k8s-ingress-image-push\\/ingress-gce-e2e-glbc-amd64:latest/' /etc/kubernetes/manifests/glbc.manifest"
+		// User specified image to upgrade to.
+		targetImage := TestContext.IngressUpgradeImage
+		if targetImage != "" {
+			command = fmt.Sprintf("sudo sed -i -re 's|(image:)(.*)|\\1 %s|' /etc/kubernetes/manifests/glbc.manifest", targetImage)
+		} else {
+			// Upgrade to latest HEAD image.
+			command = "sudo sed -i -re 's/(image:)(.*)/\\1 k8s.gcr.io\\/k8s-ingress-image-push\\/ingress-gce-e2e-glbc-amd64:latest/' /etc/kubernetes/manifests/glbc.manifest"
+		}
 	} else {
-		// Downgrade
-		command = "sudo sed -i -re 's/(image:)(.*)/\\1 k8s.gcr.io\\/glbc:0.9.7/' /etc/kubernetes/manifests/glbc.manifest"
+		// Downgrade to latest release image.
+		command = "sudo sed -i -re 's/(image:)(.*)/\\1 k8s.gcr.io\\/google_containers\\/glbc:0.9.7/' /etc/kubernetes/manifests/glbc.manifest"
 	}
+	// Kubelet should restart glbc automatically.
 	sshResult, err := NodeExec(GetMasterHost(), command)
 	LogSSHResult(sshResult)
 	return err

test/e2e/framework/test_context.go

@@ -61,6 +61,7 @@ type TestContextType struct {
 	UpgradeTarget               string
 	EtcdUpgradeStorage          string
 	EtcdUpgradeVersion          string
+	IngressUpgradeImage         string
 	UpgradeImage                string
 	GCEUpgradeScript            string
 	ContainerRuntime            string
@@ -260,6 +261,7 @@ func RegisterClusterFlags() {
 	flag.StringVar(&TestContext.EtcdUpgradeStorage, "etcd-upgrade-storage", "", "The storage version to upgrade to (either 'etcdv2' or 'etcdv3') if doing an etcd upgrade test.")
 	flag.StringVar(&TestContext.EtcdUpgradeVersion, "etcd-upgrade-version", "", "The etcd binary version to upgrade to (e.g., '3.0.14', '2.3.7') if doing an etcd upgrade test.")
 	flag.StringVar(&TestContext.UpgradeImage, "upgrade-image", "", "Image to upgrade to (e.g. 'container_vm' or 'gci') if doing an upgrade test.")
+	flag.StringVar(&TestContext.IngressUpgradeImage, "ingress-upgrade-image", "", "Image to upgrade to if doing an upgrade test for ingress.")
 	flag.StringVar(&TestContext.GCEUpgradeScript, "gce-upgrade-script", "", "Script to use to upgrade a GCE cluster.")
 	flag.BoolVar(&TestContext.CleanStart, "clean-start", false, "If true, purge all namespaces except default and system before running tests. This serves to Cleanup test namespaces from failed/interrupted e2e runs in a long-lived cluster.")
 	flag.BoolVar(&TestContext.GarbageCollectorEnabled, "garbage-collector-enabled", true, "Set to true if the garbage collector is enabled in the kube-apiserver and kube-controller-manager, then some tests will rely on the garbage collector to delete dependent resources.")