Adding an e2e test for gce multi cluster ingress

test/e2e/framework/ingress_utils.go

@@ -62,7 +62,12 @@ const (
 	validFor = 365 * 24 * time.Hour
 
 	// Ingress class annotation defined in ingress repository.
-	ingressClass = "kubernetes.io/ingress.class"
+	// TODO: All these annotations should be reused from
+	// ingress-gce/pkg/annotations instead of duplicating them here.
+	IngressClass = "kubernetes.io/ingress.class"
+
+	// Ingress class annotation value for multi cluster ingress.
+	MulticlusterIngressClassValue = "gce-multi-cluster"
 
 	// all cloud resources created by the ingress controller start with this
 	// prefix.
@@ -937,7 +942,7 @@ func (j *IngressTestJig) CreateIngress(manifestPath, ns string, ingAnnotations m
 	j.Ingress, err = manifest.IngressFromManifest(filepath.Join(manifestPath, "ing.yaml"))
 	ExpectNoError(err)
 	j.Ingress.Namespace = ns
-	j.Ingress.Annotations = map[string]string{ingressClass: j.Class}
+	j.Ingress.Annotations = map[string]string{IngressClass: j.Class}
 	for k, v := range ingAnnotations {
 		j.Ingress.Annotations[k] = v
 	}

test/e2e/network/ingress.go

@@ -33,8 +33,9 @@ import (
 )
 
 const (
-	NEGAnnotation    = "alpha.cloud.google.com/load-balancer-neg"
-	NEGUpdateTimeout = 2 * time.Minute
+	NEGAnnotation           = "alpha.cloud.google.com/load-balancer-neg"
+	NEGUpdateTimeout        = 2 * time.Minute
+	instanceGroupAnnotation = "ingress.gcp.kubernetes.io/instance-groups"
 )
 
 var _ = SIGDescribe("Loadbalancing: L7", func() {
@@ -153,6 +154,29 @@ var _ = SIGDescribe("Loadbalancing: L7", func() {
 			// framework.ExpectNoError(jig.verifyURL(fmt.Sprintf("https://%v/", ip), "", 30, 1*time.Second, httpClient))
 		})
 
+		It("multicluster ingress should get instance group annotation", func() {
+			name := "echomap"
+			jig.CreateIngress(filepath.Join(framework.IngressManifestPath, "http"), ns, map[string]string{
+				framework.IngressClass: framework.MulticlusterIngressClassValue,
+			}, map[string]string{})
+
+			By(fmt.Sprintf("waiting for Ingress %s to come up", name))
+			pollErr := wait.Poll(2*time.Second, framework.LoadBalancerPollTimeout, func() (bool, error) {
+				ing, err := f.ClientSet.ExtensionsV1beta1().Ingresses(ns).Get(name, metav1.GetOptions{})
+				framework.ExpectNoError(err)
+				annotations := ing.Annotations
+				if annotations == nil || annotations[instanceGroupAnnotation] == "" {
+					framework.Logf("Waiting for ingress to get %s annotation. Found annotations: %v", instanceGroupAnnotation, annotations)
+					return false, nil
+				}
+				return true, nil
+			})
+			if pollErr != nil {
+				framework.ExpectNoError(fmt.Errorf("Timed out waiting for ingress %s to get %s annotation", name, instanceGroupAnnotation))
+			}
+			// TODO(nikhiljindal): Check the instance group annotation value and verify with a multizone cluster.
+		})
+
 		// TODO: Implement a multizone e2e that verifies traffic reaches each
 		// zone based on pod labels.
 	})