kubelet: Remove the deprecated flag --experimental-check-node-capabilities-before-mount

pkg/controller/volume/attachdetach/attach_detach_controller.go

@@ -166,7 +166,6 @@ func NewAttachDetachController(
 			kubeClient,
 			&adc.volumePluginMgr,
 			recorder,
-			false, // flag for experimental binary check for volume mount
 			blkutil))
 	adc.nodeStatusUpdater = statusupdater.NewNodeStatusUpdater(
 		kubeClient, nodeInformer.Lister(), adc.actualStateOfWorld)

pkg/controller/volume/attachdetach/reconciler/reconciler_test.go

@@ -55,7 +55,6 @@ func Test_Run_Positive_DoNothing(t *testing.T) {
 		fakeKubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	informerFactory := informers.NewSharedInformerFactory(fakeKubeClient, controller.NoResyncPeriodFunc())
 	nsu := statusupdater.NewNodeStatusUpdater(
@@ -91,7 +90,6 @@ func Test_Run_Positive_OneDesiredVolumeAttach(t *testing.T) {
 		fakeKubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	nsu := statusupdater.NewFakeNodeStatusUpdater(false /* returnError */)
 	reconciler := NewReconciler(
@@ -143,7 +141,6 @@ func Test_Run_Positive_OneDesiredVolumeAttachThenDetachWithUnmountedVolume(t *te
 		fakeKubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	nsu := statusupdater.NewFakeNodeStatusUpdater(false /* returnError */)
 	reconciler := NewReconciler(
@@ -216,7 +213,6 @@ func Test_Run_Positive_OneDesiredVolumeAttachThenDetachWithMountedVolume(t *test
 		fakeKubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	nsu := statusupdater.NewFakeNodeStatusUpdater(false /* returnError */)
 	reconciler := NewReconciler(
@@ -289,7 +285,6 @@ func Test_Run_Negative_OneDesiredVolumeAttachThenDetachWithUnmountedVolumeUpdate
 		fakeKubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	nsu := statusupdater.NewFakeNodeStatusUpdater(true /* returnError */)
 	reconciler := NewReconciler(
@@ -365,7 +360,6 @@ func Test_Run_OneVolumeAttachAndDetachMultipleNodesWithReadWriteMany(t *testing.
 		fakeKubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	nsu := statusupdater.NewFakeNodeStatusUpdater(false /* returnError */)
 	reconciler := NewReconciler(
@@ -458,7 +452,6 @@ func Test_Run_OneVolumeAttachAndDetachMultipleNodesWithReadWriteOnce(t *testing.
 		fakeKubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	nsu := statusupdater.NewFakeNodeStatusUpdater(false /* returnError */)
 	reconciler := NewReconciler(
@@ -549,7 +542,6 @@ func Test_Run_OneVolumeAttachAndDetachUncertainNodesWithReadWriteOnce(t *testing
 		fakeKubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	nsu := statusupdater.NewFakeNodeStatusUpdater(false /* returnError */)
 	reconciler := NewReconciler(
@@ -611,7 +603,6 @@ func Test_Run_OneVolumeDetachFailNodeWithReadWriteOnce(t *testing.T) {
 		fakeKubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	nsu := statusupdater.NewFakeNodeStatusUpdater(false /* returnError */)
 	reconciler := NewReconciler(
@@ -713,7 +704,6 @@ func Test_Run_OneVolumeAttachAndDetachTimeoutNodesWithReadWriteOnce(t *testing.T
 		fakeKubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	nsu := statusupdater.NewFakeNodeStatusUpdater(false /* returnError */)
 	reconciler := NewReconciler(
@@ -819,7 +809,6 @@ func Test_ReportMultiAttachError(t *testing.T) {
 			fakeKubeClient,
 			volumePluginMgr,
 			fakeRecorder,
-			false, /* checkNodeCapabilitiesBeforeMount */
 			fakeHandler))
 		nsu := statusupdater.NewFakeNodeStatusUpdater(false /* returnError */)
 		rc := NewReconciler(

pkg/controller/volume/expand/expand_controller.go

@@ -143,7 +143,6 @@ func NewExpandController(
 		kubeClient,
 		&expc.volumePluginMgr,
 		expc.recorder,
-		false,
 		blkutil)
 
 	pvcInformer.Informer().AddEventHandler(kcache.ResourceEventHandlerFuncs{

pkg/kubelet/kubelet.go

@@ -349,7 +349,6 @@ func NewMainKubelet(kubeCfg *kubeletconfiginternal.KubeletConfiguration,
 	allowedUnsafeSysctls []string,
 	experimentalMounterPath string,
 	kernelMemcgNotification bool,
-	experimentalCheckNodeCapabilitiesBeforeMount bool,
 	experimentalNodeAllocatableIgnoreEvictionThreshold bool,
 	minimumGCAge metav1.Duration,
 	maxPerPodContainerCount int32,
@@ -772,7 +771,6 @@ func NewMainKubelet(kubeCfg *kubeletconfiginternal.KubeletConfiguration,
 	// If the experimentalMounterPathFlag is set, we do not want to
 	// check node capabilities since the mount path is not the default
 	if len(experimentalMounterPath) != 0 {
-		experimentalCheckNodeCapabilitiesBeforeMount = false
 		// Replace the nameserver in containerized-mounter's rootfs/etc/resolv.conf with kubelet.ClusterDNS
 		// so that service name could be resolved
 		klet.dnsConfigurer.SetupDNSinContainerizedMounter(experimentalMounterPath)
@@ -791,7 +789,6 @@ func NewMainKubelet(kubeCfg *kubeletconfiginternal.KubeletConfiguration,
 		kubeDeps.HostUtil,
 		klet.getPodsDir(),
 		kubeDeps.Recorder,
-		experimentalCheckNodeCapabilitiesBeforeMount,
 		keepTerminatedPodVolumes,
 		volumepathhandler.NewBlockVolumePathHandler())
 

pkg/kubelet/kubelet_test.go

@@ -363,7 +363,6 @@ func newTestKubeletWithImageList(
 		kubelet.hostutil,
 		kubelet.getPodsDir(),
 		kubelet.recorder,
-		false, /* experimentalCheckNodeCapabilitiesBeforeMount*/
 		false, /* keepTerminatedPodVolumes */
 		volumetest.NewBlockVolumePathHandler())
 

pkg/kubelet/kubelet_volumes_test.go

@@ -554,10 +554,6 @@ func (f *stubVolume) GetAttributes() volume.Attributes {
 	return volume.Attributes{}
 }
 
-func (f *stubVolume) CanMount() error {
-	return nil
-}
-
 func (f *stubVolume) SetUp(mounterArgs volume.MounterArgs) error {
 	return nil
 }

pkg/kubelet/runonce_test.go

@@ -114,7 +114,6 @@ func TestRunOnce(t *testing.T) {
 		kb.hostutil,
 		kb.getPodsDir(),
 		kb.recorder,
-		false, /* experimentalCheckNodeCapabilitiesBeforeMount */
 		false, /* keepTerminatedPodVolumes */
 		volumetest.NewBlockVolumePathHandler())
 

pkg/kubelet/volumemanager/reconciler/reconciler_test.go

@@ -76,7 +76,6 @@ func Test_Run_Positive_DoNothing(t *testing.T) {
 		kubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler,
 	))
 	reconciler := NewReconciler(
@@ -121,7 +120,6 @@ func Test_Run_Positive_VolumeAttachAndMount(t *testing.T) {
 		kubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	reconciler := NewReconciler(
 		kubeClient,
@@ -212,7 +210,6 @@ func Test_Run_Positive_VolumeMountControllerAttachEnabled(t *testing.T) {
 		kubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	reconciler := NewReconciler(
 		kubeClient,
@@ -292,7 +289,6 @@ func Test_Run_Negative_VolumeMountControllerAttachEnabled(t *testing.T) {
 		kubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	reconciler := NewReconciler(
 		kubeClient,
@@ -371,7 +367,6 @@ func Test_Run_Positive_VolumeAttachMountUnmountDetach(t *testing.T) {
 		kubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	reconciler := NewReconciler(
 		kubeClient,
@@ -474,7 +469,6 @@ func Test_Run_Positive_VolumeUnmountControllerAttachEnabled(t *testing.T) {
 		kubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	reconciler := NewReconciler(
 		kubeClient,
@@ -598,7 +592,6 @@ func Test_Run_Positive_VolumeAttachAndMap(t *testing.T) {
 		kubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	reconciler := NewReconciler(
 		kubeClient,
@@ -714,7 +707,6 @@ func Test_Run_Positive_BlockVolumeMapControllerAttachEnabled(t *testing.T) {
 		kubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	reconciler := NewReconciler(
 		kubeClient,
@@ -812,7 +804,6 @@ func Test_Run_Positive_BlockVolumeAttachMapUnmapDetach(t *testing.T) {
 		kubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	reconciler := NewReconciler(
 		kubeClient,
@@ -937,7 +928,6 @@ func Test_Run_Positive_VolumeUnmapControllerAttachEnabled(t *testing.T) {
 		kubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	reconciler := NewReconciler(
 		kubeClient,
@@ -1014,8 +1004,7 @@ func Test_GenerateMapVolumeFunc_Plugin_Not_Found(t *testing.T) {
 			oex := operationexecutor.NewOperationExecutor(operationexecutor.NewOperationGenerator(
 				nil, /* kubeClient */
 				volumePluginMgr,
-				nil,   /* fakeRecorder */
-				false, /* checkNodeCapabilitiesBeforeMount */
+				nil, /* fakeRecorder */
 				nil))
 
 			pod := &v1.Pod{
@@ -1065,8 +1054,7 @@ func Test_GenerateUnmapVolumeFunc_Plugin_Not_Found(t *testing.T) {
 			oex := operationexecutor.NewOperationExecutor(operationexecutor.NewOperationGenerator(
 				nil, /* kubeClient */
 				volumePluginMgr,
-				nil,   /* fakeRecorder */
-				false, /* checkNodeCapabilitiesBeforeMount */
+				nil, /* fakeRecorder */
 				nil))
 			volumeMode := v1.PersistentVolumeBlock
 			tmpSpec := &volume.Spec{PersistentVolume: &v1.PersistentVolume{Spec: v1.PersistentVolumeSpec{VolumeMode: &volumeMode}}}
@@ -1108,8 +1096,7 @@ func Test_GenerateUnmapDeviceFunc_Plugin_Not_Found(t *testing.T) {
 			oex := operationexecutor.NewOperationExecutor(operationexecutor.NewOperationGenerator(
 				nil, /* kubeClient */
 				volumePluginMgr,
-				nil,   /* fakeRecorder */
-				false, /* checkNodeCapabilitiesBeforeMount */
+				nil, /* fakeRecorder */
 				nil))
 			var hostutil hostutil.HostUtils
 			volumeMode := v1.PersistentVolumeBlock
@@ -1259,7 +1246,6 @@ func Test_Run_Positive_VolumeFSResizeControllerAttachEnabled(t *testing.T) {
 				kubeClient,
 				volumePluginMgr,
 				fakeRecorder,
-				false, /* checkNodeCapabilitiesBeforeMount */
 				fakeHandler))
 
 			reconciler := NewReconciler(
@@ -1450,7 +1436,6 @@ func Test_UncertainDeviceGlobalMounts(t *testing.T) {
 					kubeClient,
 					volumePluginMgr,
 					fakeRecorder,
-					false, /* checkNodeCapabilitiesBeforeMount */
 					fakeHandler))
 
 				reconciler := NewReconciler(
@@ -1673,7 +1658,6 @@ func Test_UncertainVolumeMountState(t *testing.T) {
 					kubeClient,
 					volumePluginMgr,
 					fakeRecorder,
-					false, /* checkNodeCapabilitiesBeforeMount */
 					fakeHandler))
 
 				reconciler := NewReconciler(
@@ -1985,7 +1969,6 @@ func Test_Run_Positive_VolumeMountControllerAttachEnabledRace(t *testing.T) {
 		kubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false, /* checkNodeCapabilitiesBeforeMount */
 		fakeHandler))
 	reconciler := NewReconciler(
 		kubeClient,

pkg/kubelet/volumemanager/volume_manager.go

@@ -180,7 +180,6 @@ func NewVolumeManager(
 	hostutil hostutil.HostUtils,
 	kubeletPodsDir string,
 	recorder record.EventRecorder,
-	checkNodeCapabilitiesBeforeMount bool,
 	keepTerminatedPodVolumes bool,
 	blockVolumePathHandler volumepathhandler.BlockVolumePathHandler) VolumeManager {
 
@@ -193,7 +192,6 @@ func NewVolumeManager(
 			kubeClient,
 			volumePluginMgr,
 			recorder,
-			checkNodeCapabilitiesBeforeMount,
 			blockVolumePathHandler)),
 	}
 

pkg/kubelet/volumemanager/volume_manager_test.go

@@ -315,7 +315,6 @@ func newTestVolumeManager(t *testing.T, tmpDir string, podManager kubepod.Manage
 		hostutil.NewFakeHostUtil(nil),
 		"",
 		fakeRecorder,
-		false, /* experimentalCheckNodeCapabilitiesBeforeMount */
 		false, /* keepTerminatedPodVolumes */
 		fakePathHandler)
 

pkg/volume/awsebs/aws_ebs.go

@@ -356,13 +356,6 @@ func (b *awsElasticBlockStoreMounter) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *awsElasticBlockStoreMounter) CanMount() error {
-	return nil
-}
-
 // SetUp attaches the disk and bind mounts to the volume path.
 func (b *awsElasticBlockStoreMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return b.SetUpAt(b.GetPath(), mounterArgs)

pkg/volume/azure_file/azure_file.go

@@ -245,13 +245,6 @@ func (b *azureFileMounter) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *azureFileMounter) CanMount() error {
-	return nil
-}
-
 // SetUp attaches the disk and bind mounts to the volume path.
 func (b *azureFileMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return b.SetUpAt(b.GetPath(), mounterArgs)

pkg/volume/azuredd/azure_mounter.go

@@ -62,10 +62,6 @@ func (m *azureDiskMounter) GetAttributes() volume.Attributes {
 	}
 }
 
-func (m *azureDiskMounter) CanMount() error {
-	return nil
-}
-
 func (m *azureDiskMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return m.SetUpAt(m.GetPath(), mounterArgs)
 }

pkg/volume/cephfs/cephfs.go

@@ -212,13 +212,6 @@ func (cephfsVolume *cephfsMounter) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (cephfsVolume *cephfsMounter) CanMount() error {
-	return nil
-}
-
 // SetUp attaches the disk and bind mounts to the volume path.
 func (cephfsVolume *cephfsMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return cephfsVolume.SetUpAt(cephfsVolume.GetPath(), mounterArgs)

pkg/volume/cinder/cinder.go

@@ -377,13 +377,6 @@ func (b *cinderVolumeMounter) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *cinderVolumeMounter) CanMount() error {
-	return nil
-}
-
 func (b *cinderVolumeMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return b.SetUpAt(b.GetPath(), mounterArgs)
 }

pkg/volume/configmap/configmap.go

@@ -173,13 +173,6 @@ func wrappedVolumeSpec() volume.Spec {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *configMapVolumeMounter) CanMount() error {
-	return nil
-}
-
 func (b *configMapVolumeMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return b.SetUpAt(b.GetPath(), mounterArgs)
 }

pkg/volume/csi/csi_mounter.go

@@ -96,10 +96,6 @@ func getTargetPath(uid types.UID, specVolumeID string, host volume.VolumeHost) s
 // volume.Mounter methods
 var _ volume.Mounter = &csiMountMgr{}
 
-func (c *csiMountMgr) CanMount() error {
-	return nil
-}
-
 func (c *csiMountMgr) SetUp(mounterArgs volume.MounterArgs) error {
 	return c.SetUpAt(c.GetPath(), mounterArgs)
 }

pkg/volume/csi/csi_test.go

@@ -444,10 +444,6 @@ func TestCSI_VolumeAll(t *testing.T) {
 				t.Fatalf("csiTest.VolumeAll volPlugin.NewMounter is nil or error: %s", err)
 			}
 
-			if err := mounter.CanMount(); err != nil {
-				t.Fatal("csiTest.VolumeAll mounter.CanMount failed, skipping mount")
-			}
-
 			var fsGroup *int64
 			if pod.Spec.SecurityContext != nil && pod.Spec.SecurityContext.FSGroup != nil {
 				fsGroup = pod.Spec.SecurityContext.FSGroup

pkg/volume/downwardapi/downwardapi.go

@@ -159,13 +159,6 @@ func (d *downwardAPIVolume) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *downwardAPIVolumeMounter) CanMount() error {
-	return nil
-}
-
 // SetUp puts in place the volume plugin.
 // This function is not idempotent by design. We want the data to be refreshed periodically.
 // The internal sync interval of kubelet will drive the refresh of data.

pkg/volume/emptydir/empty_dir.go

@@ -225,13 +225,6 @@ func (ed *emptyDir) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (ed *emptyDir) CanMount() error {
-	return nil
-}
-
 // SetUp creates new directory.
 func (ed *emptyDir) SetUp(mounterArgs volume.MounterArgs) error {
 	return ed.SetUpAt(ed.GetPath(), mounterArgs)

pkg/volume/fc/fc.go

@@ -370,13 +370,6 @@ func (b *fcDiskMounter) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *fcDiskMounter) CanMount() error {
-	return nil
-}
-
 func (b *fcDiskMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return b.SetUpAt(b.GetPath(), mounterArgs)
 }

pkg/volume/flexvolume/mounter-defaults.go

@@ -50,7 +50,3 @@ func (f *mounterDefaults) GetAttributes() volume.Attributes {
 		SupportsSELinux: f.flexVolume.plugin.capabilities.SELinuxRelabel,
 	}
 }
-
-func (f *mounterDefaults) CanMount() error {
-	return nil
-}

pkg/volume/flexvolume/mounter.go

@@ -107,7 +107,3 @@ func (f *flexVolumeMounter) SetUpAt(dir string, mounterArgs volume.MounterArgs)
 func (f *flexVolumeMounter) GetAttributes() volume.Attributes {
 	return (*mounterDefaults)(f).GetAttributes()
 }
-
-func (f *flexVolumeMounter) CanMount() error {
-	return nil
-}

pkg/volume/flocker/flocker.go

@@ -220,13 +220,6 @@ func (b *flockerVolumeMounter) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *flockerVolumeMounter) CanMount() error {
-	return nil
-}
-
 func (b *flockerVolumeMounter) GetPath() string {
 	return getPath(b.podUID, b.volName, b.plugin.host)
 }

pkg/volume/gcepd/gce_pd.go

@@ -360,13 +360,6 @@ func (b *gcePersistentDiskMounter) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *gcePersistentDiskMounter) CanMount() error {
-	return nil
-}
-
 // SetUp bind mounts the disk global mount to the volume path.
 func (b *gcePersistentDiskMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return b.SetUpAt(b.GetPath(), mounterArgs)

pkg/volume/git_repo/git_repo.go

@@ -167,13 +167,6 @@ func (b *gitRepoVolumeMounter) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *gitRepoVolumeMounter) CanMount() error {
-	return nil
-}
-
 // SetUp creates new directory and clones a git repo.
 func (b *gitRepoVolumeMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return b.SetUpAt(b.GetPath(), mounterArgs)

pkg/volume/glusterfs/glusterfs.go

@@ -25,7 +25,6 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
-	"runtime"
 	"strconv"
 	dstrings "strings"
 	"sync"
@@ -73,14 +72,13 @@ var _ volume.Provisioner = &glusterfsVolumeProvisioner{}
 var _ volume.Deleter = &glusterfsVolumeDeleter{}
 
 const (
-	glusterfsPluginName            = "kubernetes.io/glusterfs"
-	volPrefix                      = "vol_"
-	dynamicEpSvcPrefix             = "glusterfs-dynamic"
-	replicaCount                   = 3
-	secretKeyName                  = "key" // key name used in secret
-	gciLinuxGlusterMountBinaryPath = "/sbin/mount.glusterfs"
-	defaultGidMin                  = 2000
-	defaultGidMax                  = math.MaxInt32
+	glusterfsPluginName = "kubernetes.io/glusterfs"
+	volPrefix           = "vol_"
+	dynamicEpSvcPrefix  = "glusterfs-dynamic"
+	replicaCount        = 3
+	secretKeyName       = "key" // key name used in secret
+	defaultGidMin       = 2000
+	defaultGidMax       = math.MaxInt32
 
 	// maxCustomEpNamePrefix is the maximum number of chars.
 	// which can be used as ep/svc name prefix. This number is carved
@@ -257,20 +255,6 @@ func (b *glusterfsMounter) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *glusterfsMounter) CanMount() error {
-	exe := b.plugin.host.GetExec(b.plugin.GetPluginName())
-	switch runtime.GOOS {
-	case "linux":
-		if _, err := exe.Command("test", "-x", gciLinuxGlusterMountBinaryPath).CombinedOutput(); err != nil {
-			return fmt.Errorf("required binary %s is missing", gciLinuxGlusterMountBinaryPath)
-		}
-	}
-	return nil
-}
-
 // SetUp attaches the disk and bind mounts to the volume path.
 func (b *glusterfsMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return b.SetUpAt(b.GetPath(), mounterArgs)

pkg/volume/hostpath/host_path.go

@@ -218,13 +218,6 @@ func (b *hostPathMounter) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *hostPathMounter) CanMount() error {
-	return nil
-}
-
 // SetUp does nothing.
 func (b *hostPathMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	err := validation.ValidatePathNoBacksteps(b.GetPath())

pkg/volume/iscsi/iscsi.go

@@ -352,13 +352,6 @@ func (b *iscsiDiskMounter) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *iscsiDiskMounter) CanMount() error {
-	return nil
-}
-
 func (b *iscsiDiskMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return b.SetUpAt(b.GetPath(), mounterArgs)
 }

pkg/volume/local/local.go

@@ -510,13 +510,6 @@ func (m *localVolumeMounter) GetAttributes() volume.Attributes {
 	}
 }
 
-// CanMount checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (m *localVolumeMounter) CanMount() error {
-	return nil
-}
-
 // SetUp bind mounts the directory to the volume path
 func (m *localVolumeMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return m.SetUpAt(m.GetPath(), mounterArgs)

pkg/volume/nfs/nfs.go

@@ -20,7 +20,6 @@ import (
 	"fmt"
 	netutil "k8s.io/utils/net"
 	"os"
-	"runtime"
 	"time"
 
 	"k8s.io/klog/v2"
@@ -198,28 +197,6 @@ func (nfsVolume *nfs) GetPath() string {
 	return nfsVolume.plugin.host.GetPodVolumeDir(nfsVolume.pod.UID, utilstrings.EscapeQualifiedName(name), nfsVolume.volName)
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (nfsMounter *nfsMounter) CanMount() error {
-	exec := nfsMounter.plugin.host.GetExec(nfsMounter.plugin.GetPluginName())
-	switch runtime.GOOS {
-	case "linux":
-		if _, err := exec.Command("test", "-x", "/sbin/mount.nfs").CombinedOutput(); err != nil {
-			return fmt.Errorf("required binary /sbin/mount.nfs is missing")
-		}
-		if _, err := exec.Command("test", "-x", "/sbin/mount.nfs4").CombinedOutput(); err != nil {
-			return fmt.Errorf("required binary /sbin/mount.nfs4 is missing")
-		}
-		return nil
-	case "darwin":
-		if _, err := exec.Command("test", "-x", "/sbin/mount_nfs").CombinedOutput(); err != nil {
-			return fmt.Errorf("required binary /sbin/mount_nfs is missing")
-		}
-	}
-	return nil
-}
-
 type nfsMounter struct {
 	*nfs
 	server       string

pkg/volume/portworx/portworx.go

@@ -293,13 +293,6 @@ func (b *portworxVolumeMounter) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *portworxVolumeMounter) CanMount() error {
-	return nil
-}
-
 // SetUp attaches the disk and bind mounts to the volume path.
 func (b *portworxVolumeMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return b.SetUpAt(b.GetPath(), mounterArgs)

pkg/volume/projected/projected.go

@@ -175,13 +175,6 @@ func (sv *projectedVolume) GetAttributes() volume.Attributes {
 
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (s *projectedVolumeMounter) CanMount() error {
-	return nil
-}
-
 func (s *projectedVolumeMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return s.SetUpAt(s.GetPath(), mounterArgs)
 }

pkg/volume/quobyte/quobyte.go

@@ -231,13 +231,6 @@ func (mounter *quobyteMounter) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (mounter *quobyteMounter) CanMount() error {
-	return nil
-}
-
 // SetUp attaches the disk and bind mounts to the volume path.
 func (mounter *quobyteMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	pluginDir := mounter.plugin.host.GetPluginDir(utilstrings.EscapeQualifiedName(quobytePluginName))

pkg/volume/rbd/rbd.go

@@ -838,13 +838,6 @@ func (rbd *rbd) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *rbdMounter) CanMount() error {
-	return nil
-}
-
 func (b *rbdMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return b.SetUpAt(b.GetPath(), mounterArgs)
 }

pkg/volume/secret/secret.go

@@ -168,13 +168,6 @@ func (sv *secretVolume) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *secretVolumeMounter) CanMount() error {
-	return nil
-}
-
 func (b *secretVolumeMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return b.SetUpAt(b.GetPath(), mounterArgs)
 }

pkg/volume/storageos/storageos.go

@@ -334,13 +334,6 @@ func (b *storageosMounter) GetAttributes() volume.Attributes {
 	}
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *storageosMounter) CanMount() error {
-	return nil
-}
-
 // SetUp attaches the disk and bind mounts to the volume path.
 func (b *storageosMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	// Need a namespace to find the volume, try pod's namespace if not set.

pkg/volume/testing/testing.go

@@ -692,10 +692,6 @@ func (_ *FakeVolume) GetAttributes() Attributes {
 	}
 }
 
-func (fv *FakeVolume) CanMount() error {
-	return nil
-}
-
 func (fv *FakeVolume) SetUp(mounterArgs MounterArgs) error {
 	fv.Lock()
 	defer fv.Unlock()

pkg/volume/util/operationexecutor/operation_generator.go

@@ -80,11 +80,6 @@ type operationGenerator struct {
 	// recorder is used to record events in the API server
 	recorder record.EventRecorder
 
-	// checkNodeCapabilitiesBeforeMount, if set, enables the CanMount check,
-	// which verifies that the components (binaries, etc.) required to mount
-	// the volume are available on the underlying node before attempting mount.
-	checkNodeCapabilitiesBeforeMount bool
-
 	// blkUtil provides volume path related operations for block volume
 	blkUtil volumepathhandler.BlockVolumePathHandler
 
@@ -95,16 +90,14 @@ type operationGenerator struct {
 func NewOperationGenerator(kubeClient clientset.Interface,
 	volumePluginMgr *volume.VolumePluginMgr,
 	recorder record.EventRecorder,
-	checkNodeCapabilitiesBeforeMount bool,
 	blkUtil volumepathhandler.BlockVolumePathHandler) OperationGenerator {
 
 	return &operationGenerator{
-		kubeClient:                       kubeClient,
-		volumePluginMgr:                  volumePluginMgr,
-		recorder:                         recorder,
-		checkNodeCapabilitiesBeforeMount: checkNodeCapabilitiesBeforeMount,
-		blkUtil:                          blkUtil,
-		translator:                       csitrans.New(),
+		kubeClient:      kubeClient,
+		volumePluginMgr: volumePluginMgr,
+		recorder:        recorder,
+		blkUtil:         blkUtil,
+		translator:      csitrans.New(),
 	}
 }
 
@@ -712,16 +705,6 @@ func (og *operationGenerator) GenerateMountVolumeFunc(
 			}
 		}
 
-		if og.checkNodeCapabilitiesBeforeMount {
-			if canMountErr := volumeMounter.CanMount(); canMountErr != nil {
-				err = fmt.Errorf(
-					"verify that your node machine has the required components before attempting to mount this volume type. %s",
-					canMountErr)
-				eventErr, detailedErr := volumeToMount.GenerateError("MountVolume.CanMount failed", err)
-				return volumetypes.NewOperationContext(eventErr, detailedErr, migrated)
-			}
-		}
-
 		// Execute mount
 		mountErr := volumeMounter.SetUp(volume.MounterArgs{
 			FsUser:              util.FsUserFrom(volumeToMount.Pod),

pkg/volume/util/operationexecutor/operation_generator_test.go

@@ -419,7 +419,6 @@ func getTestOperationGenerator(volumePluginMgr *volume.VolumePluginMgr, objects
 		fakeKubeClient,
 		volumePluginMgr,
 		fakeRecorder,
-		false,
 		fakeHandler)
 	return operationGenerator
 }

pkg/volume/volume.go

@@ -136,17 +136,6 @@ type Mounter interface {
 	// Uses Interface to provide the path for Docker binds.
 	Volume
 
-	// CanMount is called immediately prior to Setup to check if
-	// the required components (binaries, etc.) are available on
-	// the underlying node to complete the subsequent SetUp (mount)
-	// operation. If CanMount returns error, the mount operation is
-	// aborted and an event is generated indicating that the node
-	// does not have the required binaries to complete the mount.
-	// If CanMount succeeds, the mount operation continues
-	// normally. The CanMount check can be enabled or disabled
-	// using the experimental-check-mount-binaries binary flag
-	CanMount() error
-
 	// SetUp prepares and mounts/unpacks the volume to a
 	// self-determined directory path. The mount point and its
 	// content should be owned by `fsUser` or 'fsGroup' so that it can be

pkg/volume/volume_linux_test.go

@@ -43,10 +43,6 @@ func (l *localFakeMounter) GetAttributes() Attributes {
 	return l.attributes
 }
 
-func (l *localFakeMounter) CanMount() error {
-	return nil
-}
-
 func (l *localFakeMounter) SetUp(mounterArgs MounterArgs) error {
 	return nil
 }

pkg/volume/vsphere_volume/vsphere_volume.go

@@ -218,13 +218,6 @@ func (b *vsphereVolumeMounter) SetUp(mounterArgs volume.MounterArgs) error {
 	return b.SetUpAt(b.GetPath(), mounterArgs)
 }
 
-// Checks prior to mount operations to verify that the required components (binaries, etc.)
-// to mount the volume are available on the underlying node.
-// If not, it returns an error
-func (b *vsphereVolumeMounter) CanMount() error {
-	return nil
-}
-
 // SetUp attaches the disk and bind mounts to the volume path.
 func (b *vsphereVolumeMounter) SetUpAt(dir string, mounterArgs volume.MounterArgs) error {
 	klog.V(5).Infof("vSphere volume setup %s to %s", b.volPath, dir)