Merge pull request #35491 from pmorie/byebye-getrootcontext

Automatic merge from submit-queue

Remove GetRootContext method from VolumeHost interface

Remove the `GetRootContext` call from the `VolumeHost` interface, since Kubernetes no longer needs to know the SELinux context of the Kubelet directory.

Per #33951 and #35127.

Depends on #33663; only the last commit is relevant to this PR.

pkg/controller/volume/attachdetach/attach_detach_controller.go

@@ -593,10 +593,6 @@ func (adc *attachDetachController) GetHostIP() (net.IP, error) {
 	return nil, fmt.Errorf("GetHostIP() not supported by Attach/Detach controller's VolumeHost implementation")
 }
 
-func (adc *attachDetachController) GetRootContext() string {
-	return ""
-}
-
 func (adc *attachDetachController) GetNodeAllocatable() (api.ResourceList, error) {
 	return api.ResourceList{}, nil
 }

pkg/controller/volume/persistentvolume/volume_host.go

@@ -77,10 +77,6 @@ func (ctrl *PersistentVolumeController) GetHostIP() (net.IP, error) {
 	return nil, fmt.Errorf("PersistentVolumeController.GetHostIP() is not implemented")
 }
 
-func (ctrl *PersistentVolumeController) GetRootContext() string {
-	return ""
-}
-
 func (ctrl *PersistentVolumeController) GetNodeAllocatable() (api.ResourceList, error) {
 	return api.ResourceList{}, nil
 }

pkg/kubelet/BUILD

@@ -29,7 +29,6 @@ go_library(
         "pod_container_deletor.go",
         "pod_workers.go",
         "reason_cache.go",
-        "root_context_linux.go",
         "runonce.go",
         "runtime.go",
         "util.go",
@@ -122,7 +121,6 @@ go_library(
         "//vendor:github.com/google/cadvisor/events",
         "//vendor:github.com/google/cadvisor/info/v1",
         "//vendor:github.com/google/cadvisor/info/v2",
-        "//vendor:github.com/opencontainers/runc/libcontainer/selinux",
     ],
 )
 

pkg/kubelet/root_context_linux.go

@@ -1,35 +0,0 @@
-// +build linux
-
-/*
-Copyright 2015 The Kubernetes Authors.
-
-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 kubelet
-
-import (
-	"github.com/opencontainers/runc/libcontainer/selinux"
-)
-
-// getRootDirContext gets the SELinux context of the kubelet rootDir
-// or returns an error.
-func (kl *Kubelet) getRootDirContext() (string, error) {
-	// If SELinux is not enabled, return an empty string
-	if !selinux.SelinuxEnabled() {
-		return "", nil
-	}
-
-	// Get the SELinux context of the rootDir.
-	return selinux.Getfilecon(kl.getRootDir())
-}

pkg/kubelet/root_context_unsupported.go

@@ -1,24 +0,0 @@
-// +build !linux
-
-/*
-Copyright 2015 The Kubernetes Authors.
-
-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 kubelet
-
-func (kl *Kubelet) getRootDirContext() (string, error) {
-	// For now, just return a blank security context on unsupported platforms
-	return "", nil
-}

pkg/kubelet/volume_host.go

@@ -132,12 +132,3 @@ func (kvh *kubeletVolumeHost) GetNodeAllocatable() (api.ResourceList, error) {
 	}
 	return node.Status.Allocatable, nil
 }
-
-func (kvh *kubeletVolumeHost) GetRootContext() string {
-	rootContext, err := kvh.kubelet.getRootDirContext()
-	if err != nil {
-		return ""
-	}
-
-	return rootContext
-}

pkg/kubelet/volumemanager/volume_manager_test.go

@@ -184,7 +184,7 @@ func newTestVolumeManager(
 	plug := &volumetest.FakeVolumePlugin{PluginName: "fake", Host: nil}
 	fakeRecorder := &record.FakeRecorder{}
 	plugMgr := &volume.VolumePluginMgr{}
-	plugMgr.InitPlugins([]volume.VolumePlugin{plug}, volumetest.NewFakeVolumeHost(tmpDir, kubeClient, nil, "" /* rootContext */))
+	plugMgr.InitPlugins([]volume.VolumePlugin{plug}, volumetest.NewFakeVolumeHost(tmpDir, kubeClient, nil))
 
 	vm, err := NewVolumeManager(
 		true,

pkg/volume/aws_ebs/attacher_test.go

@@ -169,7 +169,7 @@ func TestAttachDetach(t *testing.T) {
 // newPlugin creates a new gcePersistentDiskPlugin with fake cloud, NewAttacher
 // and NewDetacher won't work.
 func newPlugin() *awsElasticBlockStorePlugin {
-	host := volumetest.NewFakeVolumeHost("/tmp", nil, nil, "")
+	host := volumetest.NewFakeVolumeHost("/tmp", nil, nil)
 	plugins := ProbeVolumePlugins()
 	plugin := plugins[0]
 	plugin.Init(host)

pkg/volume/aws_ebs/aws_ebs_test.go

@@ -39,7 +39,7 @@ func TestCanSupport(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/aws-ebs")
 	if err != nil {
@@ -63,7 +63,7 @@ func TestGetAccessModes(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPersistentPluginByName("kubernetes.io/aws-ebs")
 	if err != nil {
@@ -112,7 +112,7 @@ func TestPlugin(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/aws-ebs")
 	if err != nil {
@@ -250,7 +250,7 @@ func TestPersistentClaimReadOnlyFlag(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, clientset, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, clientset, nil))
 	plug, _ := plugMgr.FindPluginByName(awsElasticBlockStorePluginName)
 
 	// readOnly bool is supplied by persistent-claim volume source when its mounter creates other volumes
@@ -270,7 +270,7 @@ func TestMounterAndUnmounterTypeAssert(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/aws-ebs")
 	if err != nil {

pkg/volume/azure_dd/azure_dd_test.go

@@ -39,7 +39,7 @@ func TestCanSupport(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName(azureDataDiskPluginName)
 	if err != nil {
@@ -106,7 +106,7 @@ func TestPlugin(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName(azureDataDiskPluginName)
 	if err != nil {

pkg/volume/azure_file/azure_file_test.go

@@ -37,7 +37,7 @@ func TestCanSupport(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/azure-file")
 	if err != nil {
@@ -61,7 +61,7 @@ func TestGetAccessModes(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPersistentPluginByName("kubernetes.io/azure-file")
 	if err != nil {
@@ -88,7 +88,7 @@ func TestPlugin(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/azure-file")
 	if err != nil {
@@ -185,7 +185,7 @@ func TestPersistentClaimReadOnlyFlag(t *testing.T) {
 	client := fake.NewSimpleClientset(pv, claim)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost("/tmp/fake", client, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost("/tmp/fake", client, nil))
 	plug, _ := plugMgr.FindPluginByName(azureFilePluginName)
 
 	// readOnly bool is supplied by persistent-claim volume source when its mounter creates other volumes
@@ -211,7 +211,7 @@ func TestMounterAndUnmounterTypeAssert(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/azure-file")
 	if err != nil {

pkg/volume/cephfs/cephfs_test.go

@@ -36,7 +36,7 @@ func TestCanSupport(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/cephfs")
 	if err != nil {
 		t.Errorf("Can't find the plugin by name")
@@ -59,7 +59,7 @@ func TestPlugin(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/cephfs")
 	if err != nil {
 		t.Errorf("Can't find the plugin by name")

pkg/volume/cinder/attacher_test.go

@@ -219,7 +219,7 @@ func TestAttachDetach(t *testing.T) {
 // newPlugin creates a new gcePersistentDiskPlugin with fake cloud, NewAttacher
 // and NewDetacher won't work.
 func newPlugin() *cinderPlugin {
-	host := volumetest.NewFakeVolumeHost("/tmp", nil, nil, "")
+	host := volumetest.NewFakeVolumeHost("/tmp", nil, nil)
 	plugins := ProbeVolumePlugins()
 	plugin := plugins[0]
 	plugin.Init(host)

pkg/volume/cinder/cinder_test.go

@@ -38,7 +38,7 @@ func TestCanSupport(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/cinder")
 	if err != nil {
@@ -134,7 +134,7 @@ func TestPlugin(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/cinder")
 	if err != nil {

pkg/volume/configmap/configmap_test.go

@@ -244,7 +244,7 @@ func newTestHost(t *testing.T, clientset clientset.Interface) (string, volume.Vo
 		t.Fatalf("can't make a temp rootdir: %v", err)
 	}
 
-	return tempDir, volumetest.NewFakeVolumeHost(tempDir, clientset, empty_dir.ProbeVolumePlugins(), "" /* rootContext */)
+	return tempDir, volumetest.NewFakeVolumeHost(tempDir, clientset, empty_dir.ProbeVolumePlugins())
 }
 
 func TestCanSupport(t *testing.T) {

pkg/volume/downwardapi/downwardapi_test.go

@@ -41,7 +41,7 @@ func newTestHost(t *testing.T, clientset clientset.Interface) (string, volume.Vo
 	if err != nil {
 		t.Fatalf("can't make a temp rootdir: %v", err)
 	}
-	return tempDir, volumetest.NewFakeVolumeHost(tempDir, clientset, empty_dir.ProbeVolumePlugins(), "" /* rootContext */)
+	return tempDir, volumetest.NewFakeVolumeHost(tempDir, clientset, empty_dir.ProbeVolumePlugins())
 }
 
 func TestCanSupport(t *testing.T) {

pkg/volume/empty_dir/empty_dir_test.go

@@ -35,7 +35,7 @@ import (
 // Construct an instance of a plugin, by name.
 func makePluginUnderTest(t *testing.T, plugName, basePath string) volume.VolumePlugin {
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(basePath, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(basePath, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName(plugName)
 	if err != nil {

pkg/volume/fc/fc_test.go

@@ -38,7 +38,7 @@ func TestCanSupport(t *testing.T) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/fc")
 	if err != nil {
@@ -60,7 +60,7 @@ func TestGetAccessModes(t *testing.T) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPersistentPluginByName("kubernetes.io/fc")
 	if err != nil {
@@ -131,7 +131,7 @@ func doTestPlugin(t *testing.T, spec *volume.Spec) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/fc")
 	if err != nil {
@@ -274,7 +274,7 @@ func TestPersistentClaimReadOnlyFlag(t *testing.T) {
 	client := fake.NewSimpleClientset(pv, claim)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, client, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, client, nil))
 	plug, _ := plugMgr.FindPluginByName(fcPluginName)
 
 	// readOnly bool is supplied by persistent-claim volume source when its mounter creates other volumes

pkg/volume/flexvolume/flexvolume_test.go

@@ -182,7 +182,7 @@ func TestCanSupport(t *testing.T) {
 
 	plugMgr := volume.VolumePluginMgr{}
 	installPluginUnderTest(t, "kubernetes.io", "fakeAttacher", tmpDir, execScriptTempl1, nil)
-	plugMgr.InitPlugins(ProbeVolumePlugins(tmpDir), volumetest.NewFakeVolumeHost("fake", nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(tmpDir), volumetest.NewFakeVolumeHost("fake", nil, nil))
 	plugin, err := plugMgr.FindPluginByName("kubernetes.io/fakeAttacher")
 	if err != nil {
 		t.Errorf("Can't find the plugin by name")
@@ -210,7 +210,7 @@ func TestGetAccessModes(t *testing.T) {
 
 	plugMgr := volume.VolumePluginMgr{}
 	installPluginUnderTest(t, "kubernetes.io", "fakeAttacher", tmpDir, execScriptTempl1, nil)
-	plugMgr.InitPlugins(ProbeVolumePlugins(tmpDir), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(tmpDir), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plugin, err := plugMgr.FindPersistentPluginByName("kubernetes.io/fakeAttacher")
 	if err != nil {
@@ -233,7 +233,7 @@ func contains(modes []api.PersistentVolumeAccessMode, mode api.PersistentVolumeA
 func doTestPluginAttachDetach(t *testing.T, spec *volume.Spec, tmpDir string) {
 	plugMgr := volume.VolumePluginMgr{}
 	installPluginUnderTest(t, "kubernetes.io", "fakeAttacher", tmpDir, execScriptTempl1, nil)
-	plugMgr.InitPlugins(ProbeVolumePlugins(tmpDir), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(tmpDir), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 	plugin, err := plugMgr.FindPluginByName("kubernetes.io/fakeAttacher")
 	if err != nil {
 		t.Errorf("Can't find the plugin by name")
@@ -314,7 +314,7 @@ func doTestPluginMountUnmount(t *testing.T, spec *volume.Spec, tmpDir string) {
 
 	plugMgr := volume.VolumePluginMgr{}
 	installPluginUnderTest(t, "kubernetes.io", "fakeMounter", tmpDir, execScriptTempl2, nil)
-	plugMgr.InitPlugins(ProbeVolumePlugins(tmpDir), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(tmpDir), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 	plugin, err := plugMgr.FindPluginByName("kubernetes.io/fakeMounter")
 	if err != nil {
 		t.Errorf("Can't find the plugin by name")

pkg/volume/flocker/flocker_test.go

@@ -127,7 +127,7 @@ func newInitializedVolumePlugMgr(t *testing.T) (*volume.VolumePluginMgr, string)
 	plugMgr := &volume.VolumePluginMgr{}
 	dir, err := utiltesting.MkTmpdir("flocker")
 	assert.NoError(t, err)
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(dir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(dir, nil, nil))
 	return plugMgr, dir
 }
 
@@ -138,7 +138,7 @@ func TestPlugin(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/flocker")
 	if err != nil {

pkg/volume/flocker/flocker_volume_test.go

@@ -34,7 +34,7 @@ func newTestableProvisioner(assert *assert.Assertions, options volume.VolumeOpti
 	assert.NoError(err, fmt.Sprintf("can't make a temp dir: %v", err))
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName(pluginName)
 	assert.NoError(err, "Can't find the plugin by name")

pkg/volume/gce_pd/attacher_test.go

@@ -202,8 +202,7 @@ func newPlugin() *gcePersistentDiskPlugin {
 	host := volumetest.NewFakeVolumeHost(
 		"/tmp", /* rootDir */
 		nil,    /* kubeClient */
-		nil,    /* plugins */
-		"" /* rootContext */)
+		nil /* plugins */)
 	plugins := ProbeVolumePlugins()
 	plugin := plugins[0]
 	plugin.Init(host)

pkg/volume/gce_pd/gce_pd_test.go

@@ -38,7 +38,7 @@ func TestCanSupport(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/gce-pd")
 	if err != nil {
@@ -62,7 +62,7 @@ func TestGetAccessModes(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPersistentPluginByName("kubernetes.io/gce-pd")
 	if err != nil {
@@ -105,7 +105,7 @@ func TestPlugin(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/gce-pd")
 	if err != nil {
@@ -243,7 +243,7 @@ func TestPersistentClaimReadOnlyFlag(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, client, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, client, nil))
 	plug, _ := plugMgr.FindPluginByName(gcePersistentDiskPluginName)
 
 	// readOnly bool is supplied by persistent-claim volume source when its mounter creates other volumes

pkg/volume/git_repo/git_repo_test.go

@@ -38,7 +38,7 @@ func newTestHost(t *testing.T) (string, volume.VolumeHost) {
 	if err != nil {
 		t.Fatalf("can't make a temp rootdir: %v", err)
 	}
-	return tempDir, volumetest.NewFakeVolumeHost(tempDir, nil, empty_dir.ProbeVolumePlugins(), "" /* rootContext */)
+	return tempDir, volumetest.NewFakeVolumeHost(tempDir, nil, empty_dir.ProbeVolumePlugins())
 }
 
 func TestCanSupport(t *testing.T) {

pkg/volume/glusterfs/glusterfs_test.go

@@ -42,7 +42,7 @@ func TestCanSupport(t *testing.T) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/glusterfs")
 	if err != nil {
 		t.Errorf("Can't find the plugin by name")
@@ -66,7 +66,7 @@ func TestGetAccessModes(t *testing.T) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPersistentPluginByName("kubernetes.io/glusterfs")
 	if err != nil {
@@ -94,7 +94,7 @@ func doTestPlugin(t *testing.T, spec *volume.Spec) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/glusterfs")
 	if err != nil {
 		t.Errorf("Can't find the plugin by name")
@@ -227,7 +227,7 @@ func TestPersistentClaimReadOnlyFlag(t *testing.T) {
 	client := fake.NewSimpleClientset(pv, claim, ep)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, client, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, client, nil))
 	plug, _ := plugMgr.FindPluginByName(glusterfsPluginName)
 
 	// readOnly bool is supplied by persistent-claim volume source when its mounter creates other volumes

pkg/volume/host_path/host_path_test.go

@@ -35,7 +35,7 @@ import (
 
 func TestCanSupport(t *testing.T) {
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost("fake", nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost("fake", nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/host-path")
 	if err != nil {
@@ -57,7 +57,7 @@ func TestCanSupport(t *testing.T) {
 
 func TestGetAccessModes(t *testing.T) {
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost("/tmp/fake", nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost("/tmp/fake", nil, nil))
 
 	plug, err := plugMgr.FindPersistentPluginByName("kubernetes.io/host-path")
 	if err != nil {
@@ -70,7 +70,7 @@ func TestGetAccessModes(t *testing.T) {
 
 func TestRecycler(t *testing.T) {
 	plugMgr := volume.VolumePluginMgr{}
-	pluginHost := volumetest.NewFakeVolumeHost("/tmp/fake", nil, nil, "" /* rootContext */)
+	pluginHost := volumetest.NewFakeVolumeHost("/tmp/fake", nil, nil)
 	plugMgr.InitPlugins([]volume.VolumePlugin{&hostPathPlugin{nil, volumetest.NewFakeRecycler, nil, nil, volume.VolumeConfig{}}}, pluginHost)
 
 	spec := &volume.Spec{PersistentVolume: &api.PersistentVolume{Spec: api.PersistentVolumeSpec{PersistentVolumeSource: api.PersistentVolumeSource{HostPath: &api.HostPathVolumeSource{Path: "/foo"}}}}}
@@ -100,7 +100,7 @@ func TestDeleter(t *testing.T) {
 	}
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost("/tmp/fake", nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost("/tmp/fake", nil, nil))
 
 	spec := &volume.Spec{PersistentVolume: &api.PersistentVolume{Spec: api.PersistentVolumeSpec{PersistentVolumeSource: api.PersistentVolumeSource{HostPath: &api.HostPathVolumeSource{Path: tempPath}}}}}
 	plug, err := plugMgr.FindDeletablePluginBySpec(spec)
@@ -134,7 +134,7 @@ func TestDeleterTempDir(t *testing.T) {
 
 	for name, test := range tests {
 		plugMgr := volume.VolumePluginMgr{}
-		plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost("/tmp/fake", nil, nil, "" /* rootContext */))
+		plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost("/tmp/fake", nil, nil))
 		spec := &volume.Spec{PersistentVolume: &api.PersistentVolume{Spec: api.PersistentVolumeSpec{PersistentVolumeSource: api.PersistentVolumeSource{HostPath: &api.HostPathVolumeSource{Path: test.path}}}}}
 		plug, _ := plugMgr.FindDeletablePluginBySpec(spec)
 		deleter, _ := plug.NewDeleter(spec)
@@ -155,7 +155,7 @@ func TestProvisioner(t *testing.T) {
 
 	plugMgr := volume.VolumePluginMgr{}
 	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{ProvisioningEnabled: true}),
-		volumetest.NewFakeVolumeHost("/tmp/fake", nil, nil, "" /* rootContext */))
+		volumetest.NewFakeVolumeHost("/tmp/fake", nil, nil))
 	spec := &volume.Spec{PersistentVolume: &api.PersistentVolume{Spec: api.PersistentVolumeSpec{PersistentVolumeSource: api.PersistentVolumeSource{HostPath: &api.HostPathVolumeSource{Path: tempPath}}}}}
 	plug, err := plugMgr.FindCreatablePluginBySpec(spec)
 	if err != nil {
@@ -193,7 +193,7 @@ func TestProvisioner(t *testing.T) {
 
 func TestPlugin(t *testing.T) {
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost("fake", nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost("fake", nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/host-path")
 	if err != nil {
@@ -265,7 +265,7 @@ func TestPersistentClaimReadOnlyFlag(t *testing.T) {
 	client := fake.NewSimpleClientset(pv, claim)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost("/tmp/fake", client, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost("/tmp/fake", client, nil))
 	plug, _ := plugMgr.FindPluginByName(hostPathPluginName)
 
 	// readOnly bool is supplied by persistent-claim volume source when its mounter creates other volumes

pkg/volume/iscsi/iscsi_test.go

@@ -38,7 +38,7 @@ func TestCanSupport(t *testing.T) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/iscsi")
 	if err != nil {
@@ -60,7 +60,7 @@ func TestGetAccessModes(t *testing.T) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPersistentPluginByName("kubernetes.io/iscsi")
 	if err != nil {
@@ -131,7 +131,7 @@ func doTestPlugin(t *testing.T, spec *volume.Spec) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/iscsi")
 	if err != nil {
@@ -274,7 +274,7 @@ func TestPersistentClaimReadOnlyFlag(t *testing.T) {
 	client := fake.NewSimpleClientset(pv, claim)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, client, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, client, nil))
 	plug, _ := plugMgr.FindPluginByName(iscsiPluginName)
 
 	// readOnly bool is supplied by persistent-claim volume source when its mounter creates other volumes

pkg/volume/nfs/nfs_test.go

@@ -38,7 +38,7 @@ func TestCanSupport(t *testing.T) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/nfs")
 	if err != nil {
 		t.Errorf("Can't find the plugin by name")
@@ -65,7 +65,7 @@ func TestGetAccessModes(t *testing.T) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPersistentPluginByName("kubernetes.io/nfs")
 	if err != nil {
@@ -84,7 +84,7 @@ func TestRecycler(t *testing.T) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins([]volume.VolumePlugin{&nfsPlugin{nil, newMockRecycler, volume.VolumeConfig{}}}, volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins([]volume.VolumePlugin{&nfsPlugin{nil, newMockRecycler, volume.VolumeConfig{}}}, volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	spec := &volume.Spec{PersistentVolume: &api.PersistentVolume{Spec: api.PersistentVolumeSpec{PersistentVolumeSource: api.PersistentVolumeSource{NFS: &api.NFSVolumeSource{Path: "/foo"}}}}}
 	plug, err := plugMgr.FindRecyclablePluginBySpec(spec)
@@ -141,7 +141,7 @@ func doTestPlugin(t *testing.T, spec *volume.Spec) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/nfs")
 	if err != nil {
 		t.Errorf("Can't find the plugin by name")
@@ -269,7 +269,7 @@ func TestPersistentClaimReadOnlyFlag(t *testing.T) {
 	client := fake.NewSimpleClientset(pv, claim)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost(tmpDir, client, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost(tmpDir, client, nil))
 	plug, _ := plugMgr.FindPluginByName(nfsPluginName)
 
 	// readOnly bool is supplied by persistent-claim volume source when its mounter creates other volumes

pkg/volume/plugins.go

@@ -212,12 +212,6 @@ type VolumeHost interface {
 	// Returns host IP or nil in the case of error.
 	GetHostIP() (net.IP, error)
 
-	// Returns the rootcontext to use when performing mounts for a volume.
-	// This is a temporary measure in order to set the rootContext of tmpfs
-	// mounts correctly. It will be replaced and expanded on by future
-	// SecurityContext work.
-	GetRootContext() string
-
 	// Returns node allocatable
 	GetNodeAllocatable() (api.ResourceList, error)
 }

pkg/volume/quobyte/quobyte_test.go

@@ -38,7 +38,7 @@ func TestCanSupport(t *testing.T) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, ""))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/quobyte")
 	if err != nil {
 		t.Errorf("Can't find the plugin by name")
@@ -62,7 +62,7 @@ func TestGetAccessModes(t *testing.T) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, ""))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPersistentPluginByName("kubernetes.io/quobyte")
 	if err != nil {
@@ -90,7 +90,7 @@ func doTestPlugin(t *testing.T, spec *volume.Spec) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, ""))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/quobyte")
 	if err != nil {
 		t.Errorf("Can't find the plugin by name")
@@ -186,7 +186,7 @@ func TestPersistentClaimReadOnlyFlag(t *testing.T) {
 
 	client := fake.NewSimpleClientset(pv, claim)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, client, nil, ""))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, client, nil))
 	plug, _ := plugMgr.FindPluginByName(quobytePluginName)
 
 	// readOnly bool is supplied by persistent-claim volume source when its mounter creates other volumes

pkg/volume/rbd/rbd_test.go

@@ -38,7 +38,7 @@ func TestCanSupport(t *testing.T) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/rbd")
 	if err != nil {
@@ -103,7 +103,7 @@ func doTestPlugin(t *testing.T, spec *volume.Spec) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/rbd")
 	if err != nil {
@@ -227,7 +227,7 @@ func TestPersistentClaimReadOnlyFlag(t *testing.T) {
 	client := fake.NewSimpleClientset(pv, claim)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, client, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, client, nil))
 	plug, _ := plugMgr.FindPluginByName(rbdPluginName)
 
 	// readOnly bool is supplied by persistent-claim volume source when its mounter creates other volumes

pkg/volume/secret/secret_test.go

@@ -247,7 +247,7 @@ func newTestHost(t *testing.T, clientset clientset.Interface) (string, volume.Vo
 		t.Fatalf("can't make a temp rootdir: %v", err)
 	}
 
-	return tempDir, volumetest.NewFakeVolumeHost(tempDir, clientset, empty_dir.ProbeVolumePlugins(), "" /* rootContext */)
+	return tempDir, volumetest.NewFakeVolumeHost(tempDir, clientset, empty_dir.ProbeVolumePlugins())
 }
 
 func TestCanSupport(t *testing.T) {

pkg/volume/testing/testing.go

@@ -42,17 +42,16 @@ import (
 
 // fakeVolumeHost is useful for testing volume plugins.
 type fakeVolumeHost struct {
-	rootDir     string
-	kubeClient  clientset.Interface
-	pluginMgr   VolumePluginMgr
-	cloud       cloudprovider.Interface
-	mounter     mount.Interface
-	writer      io.Writer
-	rootContext string
+	rootDir    string
+	kubeClient clientset.Interface
+	pluginMgr  VolumePluginMgr
+	cloud      cloudprovider.Interface
+	mounter    mount.Interface
+	writer     io.Writer
 }
 
-func NewFakeVolumeHost(rootDir string, kubeClient clientset.Interface, plugins []VolumePlugin, rootContext string) *fakeVolumeHost {
-	host := &fakeVolumeHost{rootDir: rootDir, kubeClient: kubeClient, cloud: nil, rootContext: rootContext}
+func NewFakeVolumeHost(rootDir string, kubeClient clientset.Interface, plugins []VolumePlugin) *fakeVolumeHost {
+	host := &fakeVolumeHost{rootDir: rootDir, kubeClient: kubeClient, cloud: nil}
 	host.mounter = &mount.FakeMounter{}
 	host.writer = &io.StdWriter{}
 	host.pluginMgr.InitPlugins(plugins, host)
@@ -123,10 +122,6 @@ func (f *fakeVolumeHost) GetHostIP() (net.IP, error) {
 	return nil, fmt.Errorf("GetHostIP() not implemented")
 }
 
-func (f *fakeVolumeHost) GetRootContext() string {
-	return f.rootContext
-}
-
 func (f *fakeVolumeHost) GetNodeAllocatable() (api.ResourceList, error) {
 	return api.ResourceList{}, nil
 }
@@ -743,7 +738,6 @@ func GetTestVolumePluginMgr(
 		"",  /* rootDir */
 		nil, /* kubeClient */
 		nil, /* plugins */
-		"",  /* rootContext */
 	)
 	plugins := ProbeVolumePlugins(VolumeConfig{})
 	if err := v.pluginMgr.InitPlugins(plugins, v); err != nil {

pkg/volume/vsphere_volume/attacher_test.go

@@ -165,7 +165,7 @@ func TestAttachDetach(t *testing.T) {
 // newPlugin creates a new vsphereVolumePlugin with fake cloud, NewAttacher
 // and NewDetacher won't work.
 func newPlugin() *vsphereVolumePlugin {
-	host := volumetest.NewFakeVolumeHost("/tmp", nil, nil, "")
+	host := volumetest.NewFakeVolumeHost("/tmp", nil, nil)
 	plugins := ProbeVolumePlugins()
 	plugin := plugins[0]
 	plugin.Init(host)

pkg/volume/vsphere_volume/vsphere_volume_test.go

@@ -37,7 +37,7 @@ func TestCanSupport(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/vsphere-volume")
 	if err != nil {
@@ -83,7 +83,7 @@ func TestPlugin(t *testing.T) {
 	defer os.RemoveAll(tmpDir)
 
 	plugMgr := volume.VolumePluginMgr{}
-	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil, "" /* rootContext */))
+	plugMgr.InitPlugins(ProbeVolumePlugins(), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
 
 	plug, err := plugMgr.FindPluginByName("kubernetes.io/vsphere-volume")
 	if err != nil {

test/integration/persistentvolumes/persistent_volumes_test.go

@@ -1110,7 +1110,7 @@ func createClients(ns *api.Namespace, t *testing.T, s *httptest.Server, syncPeri
 		Burst:         1000000,
 	})
 
-	host := volumetest.NewFakeVolumeHost("/tmp/fake", nil, nil, "" /* rootContext */)
+	host := volumetest.NewFakeVolumeHost("/tmp/fake", nil, nil)
 	plugin := &volumetest.FakeVolumePlugin{
 		PluginName:             provisionerPluginName,
 		Host:                   host,