Merge pull request #24884 from vulpecula/test-local-ssd

test/e2e/gke_local_ssd.go

+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package e2e
+
+import (
+	"fmt"
+	"os/exec"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/unversioned"
+	"k8s.io/kubernetes/pkg/apimachinery/registered"
+	"k8s.io/kubernetes/pkg/util"
+	"k8s.io/kubernetes/test/e2e/framework"
+
+	. "github.com/onsi/ginkgo"
+)
+
+var _ = framework.KubeDescribe("GKE local SSD [Feature:GKELocalSSD]", func() {
+
+	f := framework.NewDefaultFramework("localssd")
+
+	It("should write and read from node local SSD [Feature:GKELocalSSD]", func() {
+		framework.Logf("Start local SSD test")
+		createNodePoolWithLocalSsds("np-ssd")
+		doTestWriteAndReadToLocalSsd(f)
+	})
+})
+
+func createNodePoolWithLocalSsds(nodePoolName string) {
+	framework.Logf("Create node pool: %s with local SSDs in cluster: %s ",
+		nodePoolName, framework.TestContext.CloudConfig.Cluster)
+	out, err := exec.Command("gcloud", "alpha", "container", "node-pools", "create",
+		nodePoolName,
+		fmt.Sprintf("--cluster=%s", framework.TestContext.CloudConfig.Cluster),
+		"--local-ssd-count=1").Output()
+	if err != nil {
+		framework.Failf("Failed to create node pool %s: %v", nodePoolName, err)
+	}
+	framework.Logf("Successfully created node pool %s: %v", nodePoolName, out)
+}
+
+func doTestWriteAndReadToLocalSsd(f *framework.Framework) {
+	var pod = testPodWithSsd("echo 'hello world' > /mnt/ssd0/data  && sleep 1 && cat /mnt/ssd0/data")
+	var msg string
+	var out = []string{"hello world"}
+
+	f.TestContainerOutput(msg, pod, 0, out)
+}
+
+func testPodWithSsd(command string) *api.Pod {
+	containerName := "test-container"
+	volumeName := "test-ssd-volume"
+	path := "/mnt/ssd0"
+	podName := "pod-" + string(util.NewUUID())
+	image := "ubuntu:14.04"
+	return &api.Pod{
+		TypeMeta: unversioned.TypeMeta{
+			Kind:       "Pod",
+			APIVersion: registered.GroupOrDie(api.GroupName).GroupVersion.String(),
+		},
+		ObjectMeta: api.ObjectMeta{
+			Name: podName,
+		},
+		Spec: api.PodSpec{
+			Containers: []api.Container{
+				{
+					Name:    containerName,
+					Image:   image,
+					Command: []string{"/bin/sh"},
+					Args:    []string{"-c", command},
+					VolumeMounts: []api.VolumeMount{
+						{
+							Name:      volumeName,
+							MountPath: path,
+						},
+					},
+				},
+			},
+			RestartPolicy: api.RestartPolicyNever,
+			Volumes: []api.Volume{
+				{
+					Name: volumeName,
+					VolumeSource: api.VolumeSource{
+						HostPath: &api.HostPathVolumeSource{
+							Path: path,
+						},
+					},
+				},
+			},
+			NodeSelector: map[string]string{"cloud.google.com/gke-local-ssd": "true"},
+		},
+	}
+}