Golang volume.NewSpecFromVolume函数代码示例

func (kl *Kubelet) mountExternalVolumes(pod *api.Pod) (volumeMap, error) {
	podVolumes := make(volumeMap)
	for i := range pod.Spec.Volumes {
		volSpec := &pod.Spec.Volumes[i]

		podRef, err := api.GetReference(pod)
		if err != nil {
			glog.Errorf("Error getting object reference for pod: %v", pod, err)
			return nil, err
		}

		rootContext, err := kl.getRootDirContext()
		if err != nil {
			return nil, err
		}

		// Try to use a plugin for this volume.
		internal := volume.NewSpecFromVolume(volSpec)
		builder, err := kl.newVolumeBuilderFromPlugins(internal, podRef, volume.VolumeOptions{rootContext})
		if err != nil {
			glog.Errorf("Could not create volume builder for pod %s: %v", pod.UID, err)
			return nil, err
		}
		if builder == nil {
			return nil, errUnsupportedVolumeType
		}
		err = builder.SetUp()
		if err != nil {
			return nil, err
		}
		podVolumes[volSpec.Name] = builder
	}
	return podVolumes, nil
}

func TestName(t *testing.T) {
	var (
		testPodUID     = types.UID("test_pod_uid")
		testVolumeName = "test_name"
		testNamespace  = "test_metadata_namespace"
		testName       = "test_metadata_name"
	)

	volumeSpec := &api.Volume{
		Name: testVolumeName,
		VolumeSource: api.VolumeSource{
			Metadata: &api.MetadataVolumeSource{
				Items: []api.MetadataFile{
					{Name: "name_file_name", FieldRef: api.ObjectFieldSelector{
						FieldPath: "metadata.name"}}}},
		},
	}

	fake := testclient.NewSimpleFake(&api.Pod{
		ObjectMeta: api.ObjectMeta{
			Name:      testName,
			Namespace: testNamespace,
		},
	})

	pluginMgr := volume.VolumePluginMgr{}
	pluginMgr.InitPlugins(ProbeVolumePlugins(), newTestHost(t, fake))
	plugin, err := pluginMgr.FindPluginByName(metadataPluginName)
	if err != nil {
		t.Errorf("Can't find the plugin by name")
	}
	pod := &api.Pod{ObjectMeta: api.ObjectMeta{UID: testPodUID, Name: testName}}
	builder, err := plugin.NewBuilder(volume.NewSpecFromVolume(volumeSpec), pod, volume.VolumeOptions{}, &mount.FakeMounter{})
	if err != nil {
		t.Errorf("Failed to make a new Builder: %v", err)
	}
	if builder == nil {
		t.Errorf("Got a nil Builder")
	}

	volumePath := builder.GetPath()

	err = builder.SetUp()
	if err != nil {
		t.Errorf("Failed to setup volume: %v", err)
	}

	var data []byte
	data, err = ioutil.ReadFile(path.Join(volumePath, "name_file_name"))
	if err != nil {
		t.Errorf(err.Error())
	}

	if string(data) != testName {
		t.Errorf("Found `%s` expected %s", string(data), testName)
	}

	CleanEverything(plugin, testVolumeName, volumePath, testPodUID, t)

}

func TestPluginLegacy(t *testing.T) {
	plugMgr := volume.VolumePluginMgr{}
	plugMgr.InitPlugins(ProbeVolumePlugins(), volume.NewFakeVolumeHost("/tmp/fake", nil, nil))

	plug, err := plugMgr.FindPluginByName("gce-pd")
	if err != nil {
		t.Errorf("Can't find the plugin by name")
	}
	if plug.Name() != "gce-pd" {
		t.Errorf("Wrong name: %s", plug.Name())
	}
	if plug.CanSupport(&volume.Spec{Name: "foo", VolumeSource: api.VolumeSource{GCEPersistentDisk: &api.GCEPersistentDiskVolumeSource{}}}) {
		t.Errorf("Expected false")
	}

	spec := &api.Volume{VolumeSource: api.VolumeSource{GCEPersistentDisk: &api.GCEPersistentDiskVolumeSource{}}}
	if _, err := plug.NewBuilder(volume.NewSpecFromVolume(spec), &api.ObjectReference{UID: types.UID("poduid")}, volume.VolumeOptions{""}); err == nil {
		t.Errorf("Expected failiure")
	}

	cleaner, err := plug.NewCleaner("vol1", types.UID("poduid"))
	if err != nil {
		t.Errorf("Failed to make a new Cleaner: %v", err)
	}
	if cleaner == nil {
		t.Errorf("Got a nil Cleaner")
	}
}

func TestBuilderAndCleanerTypeAssert(t *testing.T) {
	plugMgr := volume.VolumePluginMgr{}
	plugMgr.InitPlugins(ProbeVolumePlugins(), volume.NewFakeVolumeHost("/tmp/fake", nil, nil))

	plug, err := plugMgr.FindPluginByName("kubernetes.io/aws-ebs")
	if err != nil {
		t.Errorf("Can't find the plugin by name")
	}
	spec := &api.Volume{
		Name: "vol1",
		VolumeSource: api.VolumeSource{
			AWSElasticBlockStore: &api.AWSElasticBlockStoreVolumeSource{
				VolumeID: "pd",
				FSType:   "ext4",
			},
		},
	}

	builder, err := plug.(*awsElasticBlockStorePlugin).newBuilderInternal(volume.NewSpecFromVolume(spec), types.UID("poduid"), &fakePDManager{}, &mount.FakeMounter{})
	if _, ok := builder.(volume.Cleaner); ok {
		t.Errorf("Volume Builder can be type-assert to Cleaner")
	}

	cleaner, err := plug.(*awsElasticBlockStorePlugin).newCleanerInternal("vol1", types.UID("poduid"), &fakePDManager{}, &mount.FakeMounter{})
	if _, ok := cleaner.(volume.Builder); ok {
		t.Errorf("Volume Cleaner can be type-assert to Builder")
	}
}

func TestPluginLegacy(t *testing.T) {
	plugMgr := volume.VolumePluginMgr{}
	plugMgr.InitPlugins(ProbeVolumePlugins(), newTestHost(t))

	plug, err := plugMgr.FindPluginByName("git")
	if err != nil {
		t.Errorf("Can't find the plugin by name")
	}
	if plug.Name() != "git" {
		t.Errorf("Wrong name: %s", plug.Name())
	}
	if plug.CanSupport(&volume.Spec{Name: "foo", VolumeSource: api.VolumeSource{GitRepo: &api.GitRepoVolumeSource{}}}) {
		t.Errorf("Expected false")
	}

	spec := &api.Volume{VolumeSource: api.VolumeSource{GitRepo: &api.GitRepoVolumeSource{}}}
	pod := &api.Pod{ObjectMeta: api.ObjectMeta{UID: types.UID("poduid")}}
	if _, err := plug.NewBuilder(volume.NewSpecFromVolume(spec), pod, volume.VolumeOptions{""}, nil); err == nil {
		t.Errorf("Expected failiure")
	}

	cleaner, err := plug.NewCleaner("vol1", types.UID("poduid"), nil)
	if err != nil {
		t.Errorf("Failed to make a new Cleaner: %v", err)
	}
	if cleaner == nil {
		t.Errorf("Got a nil Cleaner")
	}
}

func TestPluginVolume(t *testing.T) {
	vol := &api.Volume{
		Name:         "vol1",
		VolumeSource: api.VolumeSource{NFS: &api.NFSVolumeSource{"localhost", "/tmp", false}},
	}
	doTestPlugin(t, volume.NewSpecFromVolume(vol))
}

func TestPluginVolume(t *testing.T) {
	vol := &api.Volume{
		Name:         "vol1",
		VolumeSource: api.VolumeSource{Glusterfs: &api.GlusterfsVolumeSource{"ep", "vol", false}},
	}
	doTestPlugin(t, volume.NewSpecFromVolume(vol))
}

func TestPlugin(t *testing.T) {
	plug := makePluginUnderTest(t, "kubernetes.io/empty-dir")

	spec := &api.Volume{
		Name:         "vol1",
		VolumeSource: api.VolumeSource{EmptyDir: &api.EmptyDirVolumeSource{Medium: api.StorageMediumDefault}},
	}
	mounter := mount.FakeMounter{}
	mountDetector := fakeMountDetector{}
	pod := &api.Pod{ObjectMeta: api.ObjectMeta{UID: types.UID("poduid")}}
	builder, err := plug.(*emptyDirPlugin).newBuilderInternal(volume.NewSpecFromVolume(spec), pod, &mounter, &mountDetector, volume.VolumeOptions{""})
	if err != nil {
		t.Errorf("Failed to make a new Builder: %v", err)
	}
	if builder == nil {
		t.Errorf("Got a nil Builder")
	}

	volPath := builder.GetPath()
	if volPath != path.Join(basePath, "pods/poduid/volumes/kubernetes.io~empty-dir/vol1") {
		t.Errorf("Got unexpected path: %s", volPath)
	}

	if err := builder.SetUp(); err != nil {
		t.Errorf("Expected success, got: %v", err)
	}
	if _, err := os.Stat(volPath); err != nil {
		if os.IsNotExist(err) {
			t.Errorf("SetUp() failed, volume path not created: %s", volPath)
		} else {
			t.Errorf("SetUp() failed: %v", err)
		}
	}
	if len(mounter.Log) != 0 {
		t.Errorf("Expected 0 mounter calls, got %#v", mounter.Log)
	}
	mounter.ResetLog()

	cleaner, err := plug.(*emptyDirPlugin).newCleanerInternal("vol1", types.UID("poduid"), &mounter, &fakeMountDetector{})
	if err != nil {
		t.Errorf("Failed to make a new Cleaner: %v", err)
	}
	if cleaner == nil {
		t.Errorf("Got a nil Cleaner")
	}

	if err := cleaner.TearDown(); err != nil {
		t.Errorf("Expected success, got: %v", err)
	}
	if _, err := os.Stat(volPath); err == nil {
		t.Errorf("TearDown() failed, volume path still exists: %s", volPath)
	} else if !os.IsNotExist(err) {
		t.Errorf("SetUp() failed: %v", err)
	}
	if len(mounter.Log) != 0 {
		t.Errorf("Expected 0 mounter calls, got %#v", mounter.Log)
	}
	mounter.ResetLog()
}

// Test the case where the 'ready' file has been created and the pod volume dir
// is a mountpoint.  Mount should not be called.
func TestPluginIdempotent(t *testing.T) {
	var (
		testPodUID     = types.UID("test_pod_uid2")
		testVolumeName = "test_volume_name"
		testNamespace  = "test_secret_namespace"
		testName       = "test_secret_name"

		volumeSpec    = volumeSpec(testVolumeName, testName)
		secret        = secret(testNamespace, testName)
		client        = testclient.NewSimpleFake(&secret)
		pluginMgr     = volume.VolumePluginMgr{}
		rootDir, host = newTestHost(t, client)
	)

	pluginMgr.InitPlugins(ProbeVolumePlugins(), host)

	plugin, err := pluginMgr.FindPluginByName(secretPluginName)
	if err != nil {
		t.Errorf("Can't find the plugin by name")
	}

	podVolumeDir := fmt.Sprintf("%v/pods/test_pod_uid2/volumes/kubernetes.io~secret/test_volume_name", rootDir)
	podMetadataDir := fmt.Sprintf("%v/pods/test_pod_uid2/plugins/kubernetes.io~secret/test_volume_name", rootDir)
	pod := &api.Pod{ObjectMeta: api.ObjectMeta{UID: testPodUID}}
	mounter := &mount.FakeMounter{}
	mounter.MountPoints = []mount.MountPoint{
		{
			Path: podVolumeDir,
		},
	}
	util.SetReady(podMetadataDir)
	builder, err := plugin.NewBuilder(volume.NewSpecFromVolume(volumeSpec), pod, volume.VolumeOptions{}, mounter)
	if err != nil {
		t.Errorf("Failed to make a new Builder: %v", err)
	}
	if builder == nil {
		t.Errorf("Got a nil Builder")
	}

	volumePath := builder.GetPath()
	err = builder.SetUp()
	if err != nil {
		t.Errorf("Failed to setup volume: %v", err)
	}

	if len(mounter.Log) != 0 {
		t.Errorf("Unexpected calls made to mounter: %v", mounter.Log)
	}

	if _, err := os.Stat(volumePath); err != nil {
		if !os.IsNotExist(err) {
			t.Errorf("SetUp() failed unexpectedly: %v", err)
		}
	} else {
		t.Errorf("volume path should not exist: %v", volumePath)
	}
}

func TestPlugin(t *testing.T) {
	plugMgr := volume.VolumePluginMgr{}
	plugMgr.InitPlugins(ProbeVolumePlugins(), newTestHost(t))

	plug, err := plugMgr.FindPluginByName("kubernetes.io/git-repo")
	if err != nil {
		t.Errorf("Can't find the plugin by name")
	}
	spec := &api.Volume{
		Name: "vol1",
		VolumeSource: api.VolumeSource{
			GitRepo: &api.GitRepoVolumeSource{
				Repository: "https://github.com/GoogleCloudPlatform/kubernetes.git",
				Revision:   "2a30ce65c5ab586b98916d83385c5983edd353a1",
			},
		},
	}
	pod := &api.Pod{ObjectMeta: api.ObjectMeta{UID: types.UID("poduid")}}
	builder, err := plug.NewBuilder(volume.NewSpecFromVolume(spec), pod, volume.VolumeOptions{""}, mount.New())
	if err != nil {
		t.Errorf("Failed to make a new Builder: %v", err)
	}
	if builder == nil {
		t.Errorf("Got a nil Builder")
	}

	path := builder.GetPath()
	if !strings.HasSuffix(path, "pods/poduid/volumes/kubernetes.io~git-repo/vol1") {
		t.Errorf("Got unexpected path: %s", path)
	}

	testSetUp(plug, builder, t)
	if _, err := os.Stat(path); err != nil {
		if os.IsNotExist(err) {
			t.Errorf("SetUp() failed, volume path not created: %s", path)
		} else {
			t.Errorf("SetUp() failed: %v", err)
		}
	}

	cleaner, err := plug.NewCleaner("vol1", types.UID("poduid"), mount.New())
	if err != nil {
		t.Errorf("Failed to make a new Cleaner: %v", err)
	}
	if cleaner == nil {
		t.Errorf("Got a nil Cleaner")
	}

	if err := cleaner.TearDown(); err != nil {
		t.Errorf("Expected success, got: %v", err)
	}
	if _, err := os.Stat(path); err == nil {
		t.Errorf("TearDown() failed, volume path still exists: %s", path)
	} else if !os.IsNotExist(err) {
		t.Errorf("SetUp() failed: %v", err)
	}
}

func TestPlugin(t *testing.T) {
	plugMgr := volume.VolumePluginMgr{}
	plugMgr.InitPlugins(ProbeVolumePlugins(), volume.NewFakeVolumeHost("/tmp/fake", nil, nil))
	plug, err := plugMgr.FindPluginByName("kubernetes.io/cephfs")
	if err != nil {
		t.Errorf("Can't find the plugin by name")
	}
	spec := &api.Volume{
		Name: "vol1",
		VolumeSource: api.VolumeSource{
			CephFS: &api.CephFSVolumeSource{
				Monitors:   []string{"a", "b"},
				User:       "user",
				SecretRef:  nil,
				SecretFile: "/etc/ceph/user.secret",
			},
		},
	}

	builder, err := plug.(*cephfsPlugin).newBuilderInternal(volume.NewSpecFromVolume(spec), types.UID("poduid"), &mount.FakeMounter{}, "secrets")
	volumePath := builder.GetPath()
	if err != nil {
		t.Errorf("Failed to make a new Builder: %v", err)
	}
	if builder == nil {
		t.Errorf("Got a nil Builder: %v")
	}
	path := builder.GetPath()
	if path != "/tmp/fake/pods/poduid/volumes/kubernetes.io~cephfs/vol1" {
		t.Errorf("Got unexpected path: %s", path)
	}
	if err := builder.SetUp(); err != nil {
		t.Errorf("Expected success, got: %v", err)
	}
	if _, err := os.Stat(volumePath); err != nil {
		if os.IsNotExist(err) {
			t.Errorf("SetUp() failed, volume path not created: %s", volumePath)
		} else {
			t.Errorf("SetUp() failed: %v", err)
		}
	}
	cleaner, err := plug.(*cephfsPlugin).newCleanerInternal("vol1", types.UID("poduid"), &mount.FakeMounter{})
	if err != nil {
		t.Errorf("Failed to make a new Cleaner: %v", err)
	}
	if cleaner == nil {
		t.Errorf("Got a nil Cleaner: %v")
	}
	if err := cleaner.TearDown(); err != nil {
		t.Errorf("Expected success, got: %v", err)
	}
	if _, err := os.Stat(volumePath); err == nil {
		t.Errorf("TearDown() failed, volume path still exists: %s", volumePath)
	} else if !os.IsNotExist(err) {
		t.Errorf("SetUp() failed: %v", err)
	}
}

// Test the case where the plugin's ready file exists, but the volume dir is not a
// mountpoint, which is the state the system will be in after reboot.  The dir
// should be mounter and the secret data written to it.
func TestPluginReboot(t *testing.T) {
	var (
		testPodUID     = types.UID("test_pod_uid3")
		testVolumeName = "test_volume_name"
		testNamespace  = "test_secret_namespace"
		testName       = "test_secret_name"

		volumeSpec    = volumeSpec(testVolumeName, testName)
		secret        = secret(testNamespace, testName)
		client        = testclient.NewSimpleFake(&secret)
		pluginMgr     = volume.VolumePluginMgr{}
		rootDir, host = newTestHost(t, client)
	)

	pluginMgr.InitPlugins(ProbeVolumePlugins(), host)

	plugin, err := pluginMgr.FindPluginByName(secretPluginName)
	if err != nil {
		t.Errorf("Can't find the plugin by name")
	}

	pod := &api.Pod{ObjectMeta: api.ObjectMeta{UID: testPodUID}}
	builder, err := plugin.NewBuilder(volume.NewSpecFromVolume(volumeSpec), pod, volume.VolumeOptions{}, &mount.FakeMounter{})
	if err != nil {
		t.Errorf("Failed to make a new Builder: %v", err)
	}
	if builder == nil {
		t.Errorf("Got a nil Builder")
	}

	podMetadataDir := fmt.Sprintf("%v/pods/test_pod_uid3/plugins/kubernetes.io~secret/test_volume_name", rootDir)
	util.SetReady(podMetadataDir)
	volumePath := builder.GetPath()
	if !strings.HasSuffix(volumePath, fmt.Sprintf("pods/test_pod_uid3/volumes/kubernetes.io~secret/test_volume_name")) {
		t.Errorf("Got unexpected path: %s", volumePath)
	}

	err = builder.SetUp()
	if err != nil {
		t.Errorf("Failed to setup volume: %v", err)
	}
	if _, err := os.Stat(volumePath); err != nil {
		if os.IsNotExist(err) {
			t.Errorf("SetUp() failed, volume path not created: %s", volumePath)
		} else {
			t.Errorf("SetUp() failed: %v", err)
		}
	}

	doTestSecretDataInVolume(volumePath, secret, t)
	doTestCleanAndTeardown(plugin, testPodUID, testVolumeName, volumePath, t)
}

func TestPluginVolume(t *testing.T) {
	vol := &api.Volume{
		Name: "vol1",
		VolumeSource: api.VolumeSource{
			RBD: &api.RBDVolumeSource{
				CephMonitors: []string{"a", "b"},
				RBDImage:     "bar",
				FSType:       "ext4",
			},
		},
	}
	doTestPlugin(t, volume.NewSpecFromVolume(vol))
}

func TestPluginVolume(t *testing.T) {
	vol := &api.Volume{
		Name: "vol1",
		VolumeSource: api.VolumeSource{
			ISCSI: &api.ISCSIVolumeSource{
				TargetPortal: "127.0.0.1:3260",
				IQN:          "iqn.2014-12.server:storage.target01",
				FSType:       "ext4",
				Lun:          0,
			},
		},
	}
	doTestPlugin(t, volume.NewSpecFromVolume(vol))
}

func TestPluginBackCompat(t *testing.T) {
	plug := makePluginUnderTest(t, "kubernetes.io/empty-dir")

	spec := &api.Volume{
		Name: "vol1",
	}
	builder, err := plug.NewBuilder(volume.NewSpecFromVolume(spec), &api.ObjectReference{UID: types.UID("poduid")}, volume.VolumeOptions{""})
	if err != nil {
		t.Errorf("Failed to make a new Builder: %v", err)
	}
	if builder == nil {
		t.Errorf("Got a nil Builder")
	}

	volPath := builder.GetPath()
	if volPath != path.Join(basePath, "pods/poduid/volumes/kubernetes.io~empty-dir/vol1") {
		t.Errorf("Got unexpected path: %s", volPath)
	}
}