Fix influxdb e2e test failure.

In scalability testing influxdb was recently disabled, but we still
trying to execute corresponidng test, as a result it fails all the time.
Skip test if influxdb is disabled.

hack/ginkgo-e2e.sh

@@ -148,6 +148,7 @@ export PATH=$(dirname "${e2e_test}"):"${PATH}"
   --network="${KUBE_GCE_NETWORK:-${KUBE_GKE_NETWORK:-e2e}}" \
   --node-tag="${NODE_TAG:-}" \
   --master-tag="${MASTER_TAG:-}" \
+  --cluster-monitoring-mode="${KUBE_ENABLE_CLUSTER_MONITORING:-influxdb}" \
   ${KUBE_CONTAINER_RUNTIME:+"--container-runtime=${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

@@ -102,6 +102,8 @@ type TestContextType struct {
 	FeatureGates string
 	// Node e2e specific test context
 	NodeTestContextType
+	// Monitoring solution that is used in current cluster.
+	ClusterMonitoringMode string
 
 	// Indicates what path the kubernetes-anywhere is installed on
 	KubernetesAnywherePath string
@@ -221,6 +223,7 @@ func RegisterClusterFlags() {
 	flag.StringVar(&TestContext.Prefix, "prefix", "e2e", "A prefix to be added to cloud resources created during testing.")
 	flag.StringVar(&TestContext.MasterOSDistro, "master-os-distro", "debian", "The OS distribution of cluster master (debian, trusty, or coreos).")
 	flag.StringVar(&TestContext.NodeOSDistro, "node-os-distro", "debian", "The OS distribution of cluster VM instances (debian, trusty, or coreos).")
+	flag.StringVar(&TestContext.ClusterMonitoringMode, "cluster-monitoring-mode", "influxdb", "The monitoring solution that is used in the cluster.")
 
 	// TODO: Flags per provider?  Rename gce-project/gce-zone?
 	cloudConfig := &TestContext.CloudConfig

test/e2e/framework/util.go

@@ -331,6 +331,12 @@ func SkipUnlessProviderIs(supportedProviders ...string) {
 	}
 }
 
+func SkipUnlessClusterMonitoringModeIs(supportedMonitoring ...string) {
+	if !ClusterMonitoringModeIs(supportedMonitoring...) {
+		Skipf("Only next monitoring modes are supported %v (not %s)", supportedMonitoring, TestContext.ClusterMonitoringMode)
+	}
+}
+
 func SkipUnlessMasterOSDistroIs(supportedMasterOsDistros ...string) {
 	if !MasterOSDistroIs(supportedMasterOsDistros...) {
 		Skipf("Only supported for master OS distro %v (not %s)", supportedMasterOsDistros, TestContext.MasterOSDistro)
@@ -378,6 +384,15 @@ func ProviderIs(providers ...string) bool {
 	return false
 }
 
+func ClusterMonitoringModeIs(monitoringModes ...string) bool {
+	for _, mode := range monitoringModes {
+		if strings.ToLower(mode) == strings.ToLower(TestContext.ClusterMonitoringMode) {
+			return true
+		}
+	}
+	return false
+}
+
 func MasterOSDistroIs(supportedMasterOsDistros ...string) bool {
 	for _, distro := range supportedMasterOsDistros {
 		if strings.ToLower(distro) == strings.ToLower(TestContext.MasterOSDistro) {

test/e2e/instrumentation/monitoring/influxdb.go

@@ -39,6 +39,7 @@ var _ = instrumentation.SIGDescribe("Monitoring", func() {
 
 	BeforeEach(func() {
 		framework.SkipUnlessProviderIs("gce")
+		framework.SkipUnlessClusterMonitoringModeIs("influxdb")
 	})
 
 	It("should verify monitoring pods and all cluster nodes are available on influxdb using heapster.", func() {