Add a simple cloud provider for e2e tests on kubemark

This is needed for cluster autoscaler e2e test to
run on kubemark. We need the ability to add and
remove nodes and operate on nodegroups. Kubemark
does not provide this at the moment.

test/e2e/framework/test_context.go

@@ -27,17 +27,19 @@ import (
 	"k8s.io/client-go/tools/clientcmd"
 	"k8s.io/kubernetes/pkg/apis/componentconfig"
 	"k8s.io/kubernetes/pkg/cloudprovider"
+	"k8s.io/kubernetes/pkg/kubemark"
 )
 
 const defaultHost = "http://127.0.0.1:8080"
 
 type TestContextType struct {
-	KubeConfig         string
-	KubeContext        string
-	KubeAPIContentType string
-	KubeVolumeDir      string
-	CertDir            string
-	Host               string
+	KubeConfig                 string
+	KubemarkExternalKubeConfig string
+	KubeContext                string
+	KubeAPIContentType         string
+	KubeVolumeDir              string
+	CertDir                    string
+	Host                       string
 	// TODO: Deprecating this over time... instead just use gobindata_util.go , see #23987.
 	RepoRoot                string
 	DockershimCheckpointDir string
@@ -158,7 +160,8 @@ type CloudConfig struct {
 	NodeTag           string
 	MasterTag         string
 
-	Provider cloudprovider.Interface
+	Provider           cloudprovider.Interface
+	KubemarkController *kubemark.KubemarkController
 }
 
 var TestContext TestContextType
@@ -201,6 +204,7 @@ func RegisterCommonFlags() {
 func RegisterClusterFlags() {
 	flag.BoolVar(&TestContext.VerifyServiceAccount, "e2e-verify-service-account", true, "If true tests will verify the service account before running.")
 	flag.StringVar(&TestContext.KubeConfig, clientcmd.RecommendedConfigPathFlag, os.Getenv(clientcmd.RecommendedConfigPathEnvVar), "Path to kubeconfig containing embedded authinfo.")
+	flag.StringVar(&TestContext.KubemarkExternalKubeConfig, fmt.Sprintf("%s-%s", "kubemark-external", clientcmd.RecommendedConfigPathFlag), "", "Path to kubeconfig containing embedded authinfo for external cluster.")
 	flag.StringVar(&TestContext.KubeContext, clientcmd.FlagContext, "", "kubeconfig context to use/override. If unset, will use value from 'current-context'")
 	flag.StringVar(&TestContext.KubeAPIContentType, "kube-api-content-type", "application/vnd.kubernetes.protobuf", "ContentType used to communicate with apiserver")
 	flag.StringVar(&TestContext.FederatedKubeContext, "federated-kube-context", "e2e-federation", "kubeconfig context for federation.")