Ejemplo n.º 1
0
// 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 := host.GetMounter().(*mount.FakeMounter)
	mounter.MountPoints = []mount.MountPoint{
		{
			Path: podVolumeDir,
		},
	}
	util.SetReady(podMetadataDir)
	builder, err := plugin.NewBuilder(volume.NewSpecFromVolume(volumeSpec), pod, volume.VolumeOptions{})
	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)
	}
}
Ejemplo n.º 2
0
func (b *secretVolumeBuilder) SetUpAt(dir string) error {
	notMnt, err := b.mounter.IsLikelyNotMountPoint(dir)
	// Getting an os.IsNotExist err from is a contingency; the directory
	// may not exist yet, in which case, setup should run.
	if err != nil && !os.IsNotExist(err) {
		return err
	}

	// If the plugin readiness file is present for this volume and
	// the setup dir is a mountpoint, this volume is already ready.
	if volumeutil.IsReady(b.getMetaDir()) && !notMnt {
		return nil
	}

	glog.V(3).Infof("Setting up volume %v for pod %v at %v", b.volName, b.pod.UID, dir)

	// Wrap EmptyDir, let it do the setup.
	wrapped, err := b.plugin.host.NewWrapperBuilder(wrappedVolumeSpec, &b.pod, *b.opts)
	if err != nil {
		return err
	}
	if err := wrapped.SetUpAt(dir); err != nil {
		return err
	}

	kubeClient := b.plugin.host.GetKubeClient()
	if kubeClient == nil {
		return fmt.Errorf("Cannot setup secret volume %v because kube client is not configured", b.volName)
	}

	secret, err := kubeClient.Secrets(b.pod.Namespace).Get(b.secretName)
	if err != nil {
		glog.Errorf("Couldn't get secret %v/%v", b.pod.Namespace, b.secretName)
		return err
	} else {
		totalBytes := totalSecretBytes(secret)
		glog.V(3).Infof("Received secret %v/%v containing (%v) pieces of data, %v total bytes",
			b.pod.Namespace,
			b.secretName,
			len(secret.Data),
			totalBytes)
	}

	for name, data := range secret.Data {
		hostFilePath := path.Join(dir, name)
		glog.V(3).Infof("Writing secret data %v/%v/%v (%v bytes) to host file %v", b.pod.Namespace, b.secretName, name, len(data), hostFilePath)
		err := b.writer.WriteFile(hostFilePath, data, 0444)
		if err != nil {
			glog.Errorf("Error writing secret data to host path: %v, %v", hostFilePath, err)
			return err
		}
	}

	volumeutil.SetReady(b.getMetaDir())

	return nil
}
Ejemplo n.º 3
0
// SetUpAt creates new directory and clones a git repo.
func (b *gitRepoVolumeBuilder) SetUpAt(dir string) error {
	if volumeutil.IsReady(b.getMetaDir()) {
		return nil
	}

	// Wrap EmptyDir, let it do the setup.
	wrapped, err := b.plugin.host.NewWrapperBuilder(wrappedVolumeSpec, &b.pod, b.opts)
	if err != nil {
		return err
	}
	if err := wrapped.SetUpAt(dir); err != nil {
		return err
	}

	if output, err := b.execCommand("git", []string{"clone", b.source}, dir); err != nil {
		return fmt.Errorf("failed to exec 'git clone %s': %s: %v", b.source, output, err)
	}

	files, err := ioutil.ReadDir(dir)
	if err != nil {
		return err
	}
	if len(files) != 1 {
		return fmt.Errorf("unexpected directory contents: %v", files)
	}
	if len(b.revision) == 0 {
		// Done!
		volumeutil.SetReady(b.getMetaDir())
		return nil
	}

	subdir := path.Join(dir, files[0].Name())
	if output, err := b.execCommand("git", []string{"checkout", b.revision}, subdir); err != nil {
		return fmt.Errorf("failed to exec 'git checkout %s': %s: %v", b.revision, output, err)
	}
	if output, err := b.execCommand("git", []string{"reset", "--hard"}, subdir); err != nil {
		return fmt.Errorf("failed to exec 'git reset --hard': %s: %v", output, err)
	}

	volumeutil.SetReady(b.getMetaDir())
	return nil
}
Ejemplo n.º 4
0
// 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{})
	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)
}
Ejemplo n.º 5
0
// SetUpAt creates new directory.
func (ed *emptyDir) SetUpAt(dir string) error {
	notMnt, err := ed.mounter.IsLikelyNotMountPoint(dir)
	// Getting an os.IsNotExist err from is a contingency; the directory
	// may not exist yet, in which case, setup should run.
	if err != nil && !os.IsNotExist(err) {
		return err
	}

	// If the plugin readiness file is present for this volume, and the
	// storage medium is the default, then the volume is ready.  If the
	// medium is memory, and a mountpoint is present, then the volume is
	// ready.
	if volumeutil.IsReady(ed.getMetaDir()) {
		if ed.medium == api.StorageMediumMemory && !notMnt {
			return nil
		} else if ed.medium == api.StorageMediumDefault {
			return nil
		}
	}

	// Determine the effective SELinuxOptions to use for this volume.
	securityContext := ""
	if selinuxEnabled() {
		securityContext = ed.rootContext
	}

	switch ed.medium {
	case api.StorageMediumDefault:
		err = ed.setupDir(dir, securityContext)
	case api.StorageMediumMemory:
		err = ed.setupTmpfs(dir, securityContext)
	default:
		err = fmt.Errorf("unknown storage medium %q", ed.medium)
	}

	if err == nil {
		volumeutil.SetReady(ed.getMetaDir())
	}

	return err
}
Ejemplo n.º 6
0
// doTestPlugin sets up a volume and tears it back down.
func doTestPlugin(t *testing.T, config pluginTestConfig) {
	basePath, err := ioutil.TempDir("/tmp", "emptydir_volume_test")
	if err != nil {
		t.Fatalf("can't make a temp rootdir")
	}

	var (
		volumePath  = path.Join(basePath, "pods/poduid/volumes/kubernetes.io~empty-dir/test-volume")
		metadataDir = path.Join(basePath, "pods/poduid/plugins/kubernetes.io~empty-dir/test-volume")

		plug       = makePluginUnderTest(t, "kubernetes.io/empty-dir", basePath)
		volumeName = "test-volume"
		spec       = &api.Volume{
			Name:         volumeName,
			VolumeSource: api.VolumeSource{EmptyDir: &api.EmptyDirVolumeSource{Medium: config.medium}},
		}

		mounter       = mount.FakeMounter{}
		mountDetector = fakeMountDetector{}
		pod           = &api.Pod{ObjectMeta: api.ObjectMeta{UID: types.UID("poduid")}}
		fakeChconRnr  = &fakeChconRunner{}
	)

	// Set up the SELinux options on the pod
	if config.SELinuxOptions != nil {
		pod.Spec = api.PodSpec{
			Containers: []api.Container{
				{
					SecurityContext: &api.SecurityContext{
						SELinuxOptions: config.SELinuxOptions,
					},
					VolumeMounts: []api.VolumeMount{
						{
							Name: volumeName,
						},
					},
				},
			},
		}
	}

	if config.idempotent {
		mounter.MountPoints = []mount.MountPoint{
			{
				Path: volumePath,
			},
		}
		util.SetReady(metadataDir)
	}

	builder, err := plug.(*emptyDirPlugin).newBuilderInternal(volume.NewSpecFromVolume(spec),
		pod,
		&mounter,
		&mountDetector,
		volume.VolumeOptions{RootContext: config.rootContext},
		fakeChconRnr)
	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 != volumePath {
		t.Errorf("Got unexpected path: %s", volPath)
	}

	if err := builder.SetUp(); err != nil {
		t.Errorf("Expected success, got: %v", err)
	}

	// Stat the directory and check the permission bits
	fileinfo, err := os.Stat(volPath)
	if !config.idempotent {
		if err != nil {
			if os.IsNotExist(err) {
				t.Errorf("SetUp() failed, volume path not created: %s", volPath)
			} else {
				t.Errorf("SetUp() failed: %v", err)
			}
		}
		if e, a := perm, fileinfo.Mode().Perm(); e != a {
			t.Errorf("Unexpected file mode for %v: expected: %v, got: %v", volPath, e, a)
		}
	} else if err == nil {
		// If this test is for idempotency and we were able
		// to stat the volume path, it's an error.
		t.Errorf("Volume directory was created unexpectedly")
	}

	// Check the number of chcons during setup
	if e, a := config.expectedChcons, len(fakeChconRnr.requests); e != a {
		t.Errorf("Expected %v chcon calls, got %v", e, a)
	}
	if config.expectedChcons == 1 {
		if e, a := config.expectedSELinuxContext, fakeChconRnr.requests[0].context; e != a {
			t.Errorf("Unexpected chcon context argument; expected: %v, got: %v", e, a)
		}
		if e, a := volPath, fakeChconRnr.requests[0].dir; e != a {
			t.Errorf("Unexpected chcon path argument: expected: %v, got: %v", e, a)
		}
	}

	// Check the number of mounts performed during setup
	if e, a := config.expectedSetupMounts, len(mounter.Log); e != a {
		t.Errorf("Expected %v mounter calls during setup, got %v", e, a)
	} else if config.expectedSetupMounts == 1 &&
		(mounter.Log[0].Action != mount.FakeActionMount || mounter.Log[0].FSType != "tmpfs") {
		t.Errorf("Unexpected mounter action during setup: %#v", mounter.Log[0])
	}
	mounter.ResetLog()

	// Make a cleaner for the volume
	teardownMedium := mediumUnknown
	if config.medium == api.StorageMediumMemory {
		teardownMedium = mediumMemory
	}
	cleanerMountDetector := &fakeMountDetector{medium: teardownMedium, isMount: config.shouldBeMountedBeforeTeardown}
	cleaner, err := plug.(*emptyDirPlugin).newCleanerInternal(volumeName, types.UID("poduid"), &mounter, cleanerMountDetector)
	if err != nil {
		t.Errorf("Failed to make a new Cleaner: %v", err)
	}
	if cleaner == nil {
		t.Errorf("Got a nil Cleaner")
	}

	// Tear down the volume
	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)
	}

	// Check the number of mounter calls during tardown
	if e, a := config.expectedTeardownMounts, len(mounter.Log); e != a {
		t.Errorf("Expected %v mounter calls during teardown, got %v", e, a)
	} else if config.expectedTeardownMounts == 1 && mounter.Log[0].Action != mount.FakeActionUnmount {
		t.Errorf("Unexpected mounter action during teardown: %#v", mounter.Log[0])
	}
	mounter.ResetLog()
}