Get network name via e2e environment.

hack/ginkgo-e2e.sh

@@ -127,6 +127,7 @@ export PATH=$(dirname "${e2e_test}"):"${PATH}"
   --repo-root="${KUBE_ROOT}" \
   --node-instance-group="${NODE_INSTANCE_GROUP:-}" \
   --prefix="${KUBE_GCE_INSTANCE_PREFIX:-e2e}" \
+  --network="${KUBE_GCE_NETWORK:-${KUBE_GKE_NETWORK:-e2e}}" \
   ${KUBE_CONTAINER_RUNTIME:+"--container-runtime=${KUBE_CONTAINER_RUNTIME}"} \
   ${MASTER_OS_DISTRIBUTION:+"--master-os-distro=${MASTER_OS_DISTRIBUTION}"} \
   ${NODE_OS_DISTRIBUTION:+"--node-os-distro=${NODE_OS_DISTRIBUTION}"} \

test/e2e/framework/test_context.go

@@ -95,6 +95,7 @@ type CloudConfig struct {
 	NodeInstanceGroup string
 	NumNodes          int
 	ClusterTag        string
+	Network           string
 
 	Provider cloudprovider.Interface
 }
@@ -150,6 +151,7 @@ func RegisterClusterFlags() {
 	flag.StringVar(&cloudConfig.Zone, "gce-zone", "", "GCE zone being used, if applicable")
 	flag.StringVar(&cloudConfig.Cluster, "gke-cluster", "", "GKE name of cluster being used, if applicable")
 	flag.StringVar(&cloudConfig.NodeInstanceGroup, "node-instance-group", "", "Name of the managed instance group for nodes. Valid only for gce, gke or aws. If there is more than one group: comma separated list of groups.")
+	flag.StringVar(&cloudConfig.Network, "network", "e2e", "The cloud provider network for this e2e cluster.")
 	flag.IntVar(&cloudConfig.NumNodes, "num-nodes", -1, "Number of nodes in the cluster")
 
 	flag.StringVar(&cloudConfig.ClusterTag, "cluster-tag", "", "Tag used to identify resources.  Only required if provider is aws.")

test/e2e/ingress.go

@@ -159,7 +159,7 @@ var _ = framework.KubeDescribe("Loadbalancing: L7 [Feature:Ingress]", func() {
 			// but we want to allow easy testing where a user might've hand
 			// configured firewalls.
 			if framework.ProviderIs("gce", "gke") {
-				ExpectNoError(gcloudCreate("firewall-rules", fmt.Sprintf("ingress-80-443-%v", ns), framework.TestContext.CloudConfig.ProjectID, "--allow", "tcp:80,tcp:443", "--network", "e2e"))
+				ExpectNoError(gcloudCreate("firewall-rules", fmt.Sprintf("ingress-80-443-%v", ns), framework.TestContext.CloudConfig.ProjectID, "--allow", "tcp:80,tcp:443", "--network", framework.TestContext.CloudConfig.Network))
 			} else {
 				framework.Logf("WARNING: Not running on GCE/GKE, cannot create firewall rules for :80, :443. Assuming traffic can reach the external ips of all nodes in cluster on those ports.")
 			}