Add e2e test for emptyDir

test/e2e/empty_dir.go

+/*
+Copyright 2015 Google Inc. 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"
+	"path"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
+
+	. "github.com/onsi/ginkgo"
+)
+
+var _ = Describe("emptyDir", func() {
+	var (
+		c         *client.Client
+		podClient client.PodInterface
+	)
+
+	BeforeEach(func() {
+		var err error
+		c, err = loadClient()
+		expectNoError(err)
+
+		podClient = c.Pods(api.NamespaceDefault)
+	})
+
+	It("volume on tmpfs should have the correct mode", func() {
+		volumePath := "/test-volume"
+		source := &api.EmptyDirVolumeSource{
+			Medium: api.StorageTypeMemory,
+		}
+		pod := testPodWithVolume(volumePath, source)
+
+		pod.Spec.Containers[0].Args = []string{
+			fmt.Sprintf("--fs_type=%v", volumePath),
+			fmt.Sprintf("--file_mode=%v", volumePath),
+		}
+		testContainerOutput("emptydir r/w on tmpfs", c, pod, []string{
+			"mount type of \"/test-volume\": tmpfs",
+			"mode of file \"/test-volume\": dtrwxrwxrwx", // we expect the sticky bit (mode flag t) to be set for the dir
+		})
+	})
+
+	It("should support r/w on tmpfs", func() {
+		volumePath := "/test-volume"
+		filePath := path.Join(volumePath, "test-file")
+		source := &api.EmptyDirVolumeSource{
+			Medium: api.StorageTypeMemory,
+		}
+		pod := testPodWithVolume(volumePath, source)
+
+		pod.Spec.Containers[0].Args = []string{
+			fmt.Sprintf("--fs_type=%v", volumePath),
+			fmt.Sprintf("--rw_new_file=%v", filePath),
+			fmt.Sprintf("--file_mode=%v", filePath),
+		}
+		testContainerOutput("emptydir r/w on tmpfs", c, pod, []string{
+			"mount type of \"/test-volume\": tmpfs",
+			"mode of file \"/test-volume/test-file\": -rw-r--r--",
+			"content of file \"/test-volume/test-file\": mount-tester new file",
+		})
+	})
+})
+
+const containerName = "test-container"
+const volumeName = "test-volume"
+
+func testPodWithVolume(path string, source *api.EmptyDirVolumeSource) *api.Pod {
+	podName := "pod-" + string(util.NewUUID())
+
+	return &api.Pod{
+		TypeMeta: api.TypeMeta{
+			Kind:       "Pod",
+			APIVersion: "v1beta1",
+		},
+		ObjectMeta: api.ObjectMeta{
+			Name: podName,
+		},
+		Spec: api.PodSpec{
+			Containers: []api.Container{
+				{
+					Name:  containerName,
+					Image: "kubernetes/mounttest:0.1",
+					VolumeMounts: []api.VolumeMount{
+						{
+							Name:      volumeName,
+							MountPath: path,
+						},
+					},
+				},
+			},
+			Volumes: []api.Volume{
+				{
+					Name: volumeName,
+					VolumeSource: api.VolumeSource{
+						EmptyDir: source,
+					},
+				},
+			},
+		},
+	}
+}