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Implement NodeStage and NodeUnstage for rbd

Browse Source 
in NodeStage RPC call  we  have to map the
device to the node plugin and make  sure  the
the device will be mounted to  the global path

in  nodeUnstage request unmount the device from
global path and unmap the device

if the volume mode is block  we will be creating
a file inside a stageTargetPath  and it will be
considered  as the global path

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
This commit is contained in:
Madhu Rajanna 2019-07-03 15:32:36 +05:30 committed by mergify[bot]
parent 7d8f465746
commit f4c80dec9a
20 changed files with 485 additions and 289 deletions
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24
deploy/cephfs/helm/templates/nodeplugin-daemonset.yaml
View File

@ -87,13 +87,13 @@ spec:
volumeMounts:
- name: mount-cache-dir
mountPath: /mount-cache-dir
- name: plugin-dir
- name: socket-dir
mountPath: {{ .Values.socketDir }}
- name: pods-mount-dir
mountPath: /var/lib/kubelet/pods
- name: plugin-dir
mountPath: {{ .Values.pluginDir }}
mountPropagation: "Bidirectional"
- name: plugin-mount-dir
mountPath: {{ .Values.volumeDevicesDir }}
- name: mointpoint-dir
mountPath: /var/lib/kubelet/pods
mountPropagation: "Bidirectional"
- mountPath: /dev
name: host-dev
@ -111,22 +111,22 @@ spec:
volumes:
- name: mount-cache-dir
emptyDir: {}
- name: plugin-dir
- name: socket-dir
hostPath:
path: {{ .Values.socketDir }}
type: DirectoryOrCreate
- name: plugin-mount-dir
hostPath:
path: {{ .Values.volumeDevicesDir }}
type: DirectoryOrCreate
- name: registration-dir
hostPath:
path: {{ .Values.registrationDir }}
type: Directory
- name: pods-mount-dir
- name: plugin-dir
hostPath:
path: {{ .Values.pluginDir }}
type: Directory
- name: mountpoint-dir
hostPath:
path: /var/lib/kubelet/pods
type: Directory
type: DirectoryOrCreate
- name: host-dev
hostPath:
path: /dev

2
deploy/cephfs/helm/values.yaml
View File

@ -16,7 +16,7 @@ serviceAccounts:
socketDir: /var/lib/kubelet/plugins/cephfs.csi.ceph.com
socketFile: csi.sock
registrationDir: /var/lib/kubelet/plugins_registry
volumeDevicesDir: /var/lib/kubelet/plugins/kubernetes.io/csi/volumeDevices
pluginDir: /var/lib/kubelet/plugins
driverName: cephfs.csi.ceph.com
configMapName: ceph-csi-config
attacher:

24
deploy/cephfs/kubernetes/csi-cephfsplugin.yaml
View File

@ -38,7 +38,7 @@ spec:
fieldRef:
fieldPath: spec.nodeName
volumeMounts:
- name: plugin-dir
- name: socket-dir
mountPath: /csi
- name: registration-dir
mountPath: /registration
@ -73,13 +73,13 @@ spec:
volumeMounts:
- name: mount-cache-dir
mountPath: /mount-cache-dir
- name: plugin-dir
- name: socket-dir
mountPath: /csi
- name: csi-plugins-dir
mountPath: /var/lib/kubelet/plugins/kubernetes.io/csi
mountPropagation: "Bidirectional"
- name: pods-mount-dir
- name: mountpoint-dir
mountPath: /var/lib/kubelet/pods
mountPropagation: Bidirectional
- name: plugin-dir
mountPath: /var/lib/kubelet/plugins
mountPropagation: "Bidirectional"
- name: host-sys
mountPath: /sys
@ -93,21 +93,21 @@ spec:
volumes:
- name: mount-cache-dir
emptyDir: {}
- name: plugin-dir
- name: socket-dir
hostPath:
path: /var/lib/kubelet/plugins/cephfs.csi.ceph.com/
type: DirectoryOrCreate
- name: csi-plugins-dir
hostPath:
path: /var/lib/kubelet/plugins/kubernetes.io/csi
type: DirectoryOrCreate
- name: registration-dir
hostPath:
path: /var/lib/kubelet/plugins_registry/
type: Directory
- name: pods-mount-dir
- name: mountpoint-dir
hostPath:
path: /var/lib/kubelet/pods
type: DirectoryOrCreate
- name: plugin-dir
hostPath:
path: /var/lib/kubelet/plugins
type: Directory
- name: host-sys
hostPath:

28
deploy/rbd/helm/templates/nodeplugin-daemonset.yaml
View File

@ -14,6 +14,8 @@ spec:
app: {{ include "ceph-csi-rbd.name" . }}
component: {{ .Values.nodeplugin.name }}
release: {{ .Release.Name }}
updateStrategy:
type: OnDelete
template:
metadata:
labels:
@ -51,7 +53,7 @@ spec:
fieldPath: spec.nodeName
imagePullPolicy: {{ .Values.nodeplugin.registrar.image.pullPolicy }}
volumeMounts:
- name: plugin-dir
- name: socket-dir
mountPath: /csi
- name: registration-dir
mountPath: /registration
@ -84,13 +86,13 @@ spec:
value: "unix:/{{ .Values.socketDir }}/{{ .Values.socketFile }}"
imagePullPolicy: {{ .Values.nodeplugin.plugin.image.pullPolicy }}
volumeMounts:
- name: plugin-dir
- name: socket-dir
mountPath: {{ .Values.socketDir }}
- name: pods-mount-dir
mountPath: /var/lib/kubelet/pods
- name: plugin-dir
mountPath: {{ .Values.pluginDir }}
mountPropagation: "Bidirectional"
- name: plugin-mount-dir
mountPath: {{ .Values.volumeDevicesDir }}
- name: mointpoint-dir
mountPath: /var/lib/kubelet/pods
mountPropagation: "Bidirectional"
- mountPath: /dev
name: host-dev
@ -106,22 +108,22 @@ spec:
resources:
{{ toYaml .Values.nodeplugin.plugin.resources | indent 12 }}
volumes:
- name: plugin-dir
- name: socket-dir
hostPath:
path: {{ .Values.socketDir }}
type: DirectoryOrCreate
- name: plugin-mount-dir
hostPath:
path: {{ .Values.volumeDevicesDir }}
type: DirectoryOrCreate
- name: registration-dir
hostPath:
path: {{ .Values.registrationDir }}
type: Directory
- name: pods-mount-dir
- name: plugin-dir
hostPath:
path: {{ .Values.pluginDir }}
type: Directory
- name: mountpoint-dir
hostPath:
path: /var/lib/kubelet/pods
type: Directory
type: DirectoryOrCreate
- name: host-dev
hostPath:
path: /dev

2
deploy/rbd/helm/values.yaml
View File

@ -16,7 +16,7 @@ serviceAccounts:
socketDir: /var/lib/kubelet/plugins/rbd.csi.ceph.com
socketFile: csi.sock
registrationDir: /var/lib/kubelet/plugins_registry
volumeDevicesDir: /var/lib/kubelet/plugins/kubernetes.io/csi/volumeDevices
pluginDir: /var/lib/kubelet/plugins
driverName: rbd.csi.ceph.com
configMapName: ceph-csi-config

32
deploy/rbd/kubernetes/csi-rbdplugin.yaml
View File

@ -7,6 +7,8 @@ spec:
selector:
matchLabels:
app: csi-rbdplugin
updateStrategy:
type: OnDelete
template:
metadata:
labels:
@ -39,7 +41,7 @@ spec:
fieldRef:
fieldPath: spec.nodeName
volumeMounts:
- name: plugin-dir
- name: socket-dir
mountPath: /csi
- name: registration-dir
mountPath: /registration
@ -69,14 +71,8 @@ spec:
value: unix:///csi/csi.sock
imagePullPolicy: "IfNotPresent"
volumeMounts:
- name: plugin-dir
- name: socket-dir
mountPath: /csi
- name: pods-mount-dir
mountPath: /var/lib/kubelet/pods
mountPropagation: "Bidirectional"
- name: plugin-mount-dir
mountPath: /var/lib/kubelet/plugins/kubernetes.io/csi/volumeDevices/
mountPropagation: "Bidirectional"
- mountPath: /dev
name: host-dev
- mountPath: /rootfs
@ -88,23 +84,29 @@ spec:
readOnly: true
- name: ceph-csi-config
mountPath: /etc/ceph-csi-config/
volumes:
- name: plugin-dir
mountPath: /var/lib/kubelet/plugins
mountPropagation: "Bidirectional"
- name: mountpoint-dir
mountPath: /var/lib/kubelet/pods
mountPropagation: "Bidirectional"
volumes:
- name: socket-dir
hostPath:
path: /var/lib/kubelet/plugins/rbd.csi.ceph.com
type: DirectoryOrCreate
- name: plugin-mount-dir
- name: plugin-dir
hostPath:
path: /var/lib/kubelet/plugins/kubernetes.io/csi/volumeDevices/
path: /var/lib/kubelet/plugins
type: Directory
- name: mountpoint-dir
hostPath:
path: /var/lib/kubelet/pods
type: DirectoryOrCreate
- name: registration-dir
hostPath:
path: /var/lib/kubelet/plugins_registry/
type: Directory
- name: pods-mount-dir
hostPath:
path: /var/lib/kubelet/pods
type: Directory
- name: host-dev
hostPath:
path: /dev

7
e2e/cephfs.go
View File

@ -117,6 +117,13 @@ var _ = Describe("cephfs", func() {
}
})
By("check data persist after recreating pod with same pvc", func() {
err := checkDataPersist(pvcPath, appPath, f)
if err != nil {
Fail(err.Error())
}
})
})
})

7
e2e/rbd.go
View File

@ -189,6 +189,13 @@ var _ = Describe("RBD", func() {
Fail("validate multiple pvc failed")
}
})
By("check data persist after recreating pod with same pvc", func() {
err := checkDataPersist(pvcPath, appPath, f)
if err != nil {
Fail(err.Error())
}
})
})
})

49
e2e/utils.go
View File

@ -759,3 +759,52 @@ func GivePermToCephfsRoot(f *framework.Framework) {
out = execCommandInPod(f, "chmod 777 /mnt/cephfs/", rookNS, &opt)
e2elog.Logf("Setting chmod 777 on the cepfs root %s", out)
}
func checkDataPersist(pvcPath, appPath string, f *framework.Framework) error {
data := "checking data persist"
pvc, err := loadPVC(pvcPath)
if pvc == nil {
return err
}
pvc.Namespace = f.UniqueName
e2elog.Logf("The PVC template %+v", pvc)
app, err := loadApp(appPath)
if err != nil {
return err
}
app.Labels = map[string]string{"app": "validate-data"}
app.Namespace = f.UniqueName
err = createPVCAndApp("", f, pvc, app)
if err != nil {
return err
}
opt := metav1.ListOptions{
LabelSelector: "app=validate-data",
}
// write data to PVC
filePath := app.Spec.Containers[0].VolumeMounts[0].MountPath + "/test"
execCommandInPod(f, fmt.Sprintf("echo %s > %s", data, filePath), app.Namespace, &opt)
// delete app
err = deletePod(app.Name, app.Namespace, f.ClientSet, deployTimeout)
if err != nil {
return err
}
// recreate app and check data persist
err = createApp(f.ClientSet, app, deployTimeout)
if err != nil {
return err
}
persistData := execCommandInPod(f, fmt.Sprintf("cat %s", filePath), app.Namespace, &opt)
if !strings.Contains(persistData, data) {
return fmt.Errorf("data not persistent expected data %s received data %s ", data, persistData)
}
err = deletePVCAndApp("", f, pvc, app)
return err
}

4
examples/rbd/storageclass.yaml
View File

@ -28,8 +28,8 @@ parameters:
# to the 'pool'.
csi.storage.k8s.io/provisioner-secret-name: csi-rbd-secret
csi.storage.k8s.io/provisioner-secret-namespace: default
csi.storage.k8s.io/node-publish-secret-name: csi-rbd-secret
csi.storage.k8s.io/node-publish-secret-namespace: default
csi.storage.k8s.io/node-stage-secret-name: csi-rbd-secret
csi.storage.k8s.io/node-stage-secret-namespace: default
# uncomment the following to use rbd-nbd as mounter on supported nodes
# mounter: rbd-nbd

4
pkg/cephfs/mountcache.go
View File

@ -43,7 +43,7 @@ func initVolumeMountCache(driverName, mountCacheDir string) {
}
func remountCachedVolumes() error {
if err := os.MkdirAll(volumeMountCache.nodeCacheStore.BasePath, 0755); err != nil {
if err := util.CreateMountPoint(volumeMountCache.nodeCacheStore.BasePath); err != nil {
klog.Errorf("mount-cache: failed to create %s: %v", volumeMountCache.nodeCacheStore.BasePath, err)
return err
}
@ -124,7 +124,7 @@ func mountOneCacheEntry(volOptions *volumeOptions, vid *volumeIdentifier, me *vo
return err
}
isMnt, err := isMountPoint(me.StagingPath)
isMnt, err := util.IsMountPoint(me.StagingPath)
if err != nil {
isMnt = false
klog.Infof("mount-cache: failed to check volume mounted %s: %s %v", volID, me.StagingPath, err)

24
pkg/cephfs/nodeserver.go
View File

@ -84,8 +84,8 @@ func (ns *NodeServer) NodeStageVolume(ctx context.Context, req *csi.NodeStageVol
volOptions *volumeOptions
vid *volumeIdentifier
)
if err := validateNodeStageVolumeRequest(req); err != nil {
return nil, status.Error(codes.InvalidArgument, err.Error())
if err := util.ValidateNodeStageVolumeRequest(req); err != nil {
return nil, err
}
// Configuration
@ -115,7 +115,7 @@ func (ns *NodeServer) NodeStageVolume(ctx context.Context, req *csi.NodeStageVol
}
}
if err = createMountPoint(stagingTargetPath); err != nil {
if err = util.CreateMountPoint(stagingTargetPath); err != nil {
klog.Errorf("failed to create staging mount point at %s for volume %s: %v", stagingTargetPath, volID, err)
return nil, status.Error(codes.Internal, err.Error())
}
@ -125,7 +125,7 @@ func (ns *NodeServer) NodeStageVolume(ctx context.Context, req *csi.NodeStageVol
// Check if the volume is already mounted
isMnt, err := isMountPoint(stagingTargetPath)
isMnt, err := util.IsMountPoint(stagingTargetPath)
if err != nil {
klog.Errorf("stat failed: %v", err)
@ -180,8 +180,8 @@ func (*NodeServer) mount(volOptions *volumeOptions, req *csi.NodeStageVolumeRequ
func (ns *NodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublishVolumeRequest) (*csi.NodePublishVolumeResponse, error) {
mountOptions := []string{"bind"}
if err := validateNodePublishVolumeRequest(req); err != nil {
return nil, status.Error(codes.InvalidArgument, err.Error())
if err := util.ValidateNodePublishVolumeRequest(req); err != nil {
return nil, err
}
// Configuration
@ -189,7 +189,7 @@ func (ns *NodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublis
targetPath := req.GetTargetPath()
volID := req.GetVolumeId()
if err := createMountPoint(targetPath); err != nil {
if err := util.CreateMountPoint(targetPath); err != nil {
klog.Errorf("failed to create mount point at %s: %v", targetPath, err)
return nil, status.Error(codes.Internal, err.Error())
}
@ -218,7 +218,7 @@ func (ns *NodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublis
// Check if the volume is already mounted
isMnt, err := isMountPoint(targetPath)
isMnt, err := util.IsMountPoint(targetPath)
if err != nil {
klog.Errorf("stat failed: %v", err)
@ -255,8 +255,8 @@ func (ns *NodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublis
// NodeUnpublishVolume unmounts the volume from the target path
func (ns *NodeServer) NodeUnpublishVolume(ctx context.Context, req *csi.NodeUnpublishVolumeRequest) (*csi.NodeUnpublishVolumeResponse, error) {
var err error
if err = validateNodeUnpublishVolumeRequest(req); err != nil {
return nil, status.Error(codes.InvalidArgument, err.Error())
if err = util.ValidateNodeUnpublishVolumeRequest(req); err != nil {
return nil, err
}
targetPath := req.GetTargetPath()
@ -283,8 +283,8 @@ func (ns *NodeServer) NodeUnpublishVolume(ctx context.Context, req *csi.NodeUnpu
// NodeUnstageVolume unstages the volume from the staging path
func (ns *NodeServer) NodeUnstageVolume(ctx context.Context, req *csi.NodeUnstageVolumeRequest) (*csi.NodeUnstageVolumeResponse, error) {
var err error
if err = validateNodeUnstageVolumeRequest(req); err != nil {
return nil, status.Error(codes.InvalidArgument, err.Error())
if err = util.ValidateNodeUnstageVolumeRequest(req); err != nil {
return nil, err
}
stagingTargetPath := req.GetStagingTargetPath()

79
pkg/cephfs/util.go
View File

@ -19,7 +19,6 @@ package cephfs
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"os"
"os/exec"
@ -30,7 +29,6 @@ import (
"github.com/ceph/ceph-csi/pkg/util"
"github.com/container-storage-interface/spec/lib/go/csi"
"k8s.io/kubernetes/pkg/util/mount"
)
type volumeID string
@ -79,18 +77,6 @@ func execCommandJSON(v interface{}, program string, args ...string) error {
return nil
}
// Used in isMountPoint()
var dummyMount = mount.New("")
func isMountPoint(p string) (bool, error) {
notMnt, err := dummyMount.IsLikelyNotMountPoint(p)
if err != nil {
return false, status.Error(codes.Internal, err.Error())
}
return !notMnt, nil
}
func pathExists(p string) bool {
_, err := os.Stat(p)
return err == nil
@ -127,68 +113,3 @@ func (cs *ControllerServer) validateDeleteVolumeRequest() error {
return nil
}
// Node service request validation
func validateNodeStageVolumeRequest(req *csi.NodeStageVolumeRequest) error {
if req.GetVolumeCapability() == nil {
return errors.New("volume capability missing in request")
}
if req.GetVolumeId() == "" {
return errors.New("volume ID missing in request")
}
if req.GetStagingTargetPath() == "" {
return errors.New("staging target path missing in request")
}
if req.GetSecrets() == nil || len(req.GetSecrets()) == 0 {
return errors.New("stage secrets cannot be nil or empty")
}
return nil
}
func validateNodeUnstageVolumeRequest(req *csi.NodeUnstageVolumeRequest) error {
if req.GetVolumeId() == "" {
return errors.New("volume ID missing in request")
}
if req.GetStagingTargetPath() == "" {
return errors.New("staging target path missing in request")
}
return nil
}
func validateNodePublishVolumeRequest(req *csi.NodePublishVolumeRequest) error {
if req.GetVolumeCapability() == nil {
return errors.New("volume capability missing in request")
}
if req.GetVolumeId() == "" {
return errors.New("volume ID missing in request")
}
if req.GetTargetPath() == "" {
return errors.New("target path missing in request")
}
if req.GetStagingTargetPath() == "" {
return errors.New("staging target path missing in request")
}
return nil
}
func validateNodeUnpublishVolumeRequest(req *csi.NodeUnpublishVolumeRequest) error {
if req.GetVolumeId() == "" {
return errors.New("volume ID missing in request")
}
if req.GetTargetPath() == "" {
return errors.New("target path missing in request")
}
return nil
}

2
pkg/cephfs/volume.go
View File

@ -132,7 +132,7 @@ func mountCephRoot(volID volumeID, volOptions *volumeOptions, adminCr *util.Cred
// Access to cephfs's / is required
volOptions.RootPath = "/"
if err := createMountPoint(cephRoot); err != nil {
if err := util.CreateMountPoint(cephRoot); err != nil {
return err
}

8
pkg/cephfs/volumemounter.go
View File

@ -155,7 +155,7 @@ func mountFuse(mountPoint string, cr *util.Credentials, volOptions *volumeOption
}
func (m *fuseMounter) mount(mountPoint string, cr *util.Credentials, volOptions *volumeOptions) error {
if err := createMountPoint(mountPoint); err != nil {
if err := util.CreateMountPoint(mountPoint); err != nil {
return err
}
@ -186,7 +186,7 @@ func mountKernel(mountPoint string, cr *util.Credentials, volOptions *volumeOpti
}
func (m *kernelMounter) mount(mountPoint string, cr *util.Credentials, volOptions *volumeOptions) error {
if err := createMountPoint(mountPoint); err != nil {
if err := util.CreateMountPoint(mountPoint); err != nil {
return err
}
@ -236,7 +236,3 @@ func unmountVolume(mountPoint string) error {
return nil
}
func createMountPoint(root string) error {
return os.MkdirAll(root, 0750)
}

355
pkg/rbd/nodeserver.go
View File

@ -41,59 +41,15 @@ type NodeServer struct {
mounter mount.Interface
}
// NodePublishVolume mounts the volume mounted to the device path to the target
// path
func (ns *NodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublishVolumeRequest) (*csi.NodePublishVolumeResponse, error) {
targetPath := req.GetTargetPath()
if targetPath == "" {
return nil, status.Error(codes.InvalidArgument, "empty target path in request")
}
if req.GetVolumeCapability() == nil {
return nil, status.Error(codes.InvalidArgument, "empty volume capability in request")
}
if req.GetVolumeId() == "" {
return nil, status.Error(codes.InvalidArgument, "empty volume ID in request")
}
cr, err := util.GetUserCredentials(req.GetSecrets())
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
idLk := targetPathLocker.Lock(targetPath)
defer targetPathLocker.Unlock(idLk, targetPath)
disableInUseChecks := false
isLegacyVolume := false
volName, err := getVolumeName(req)
if err != nil {
// error ErrInvalidVolID may mean this is an 1.0.0 version volume, check for name
// pattern match in addition to error to ensure this is a likely v1.0.0 volume
if _, ok := err.(ErrInvalidVolID); !ok || !isLegacyVolumeID(req.GetVolumeId()) {
return nil, status.Error(codes.InvalidArgument, err.Error())
}
volName, err = getLegacyVolumeName(req)
if err != nil {
return nil, status.Error(codes.InvalidArgument, err.Error())
}
isLegacyVolume = true
}
isBlock := req.GetVolumeCapability().GetBlock() != nil
// Check if that target path exists properly
notMnt, err := ns.createTargetPath(targetPath, isBlock)
if err != nil {
// NodeStageVolume mounts the volume to a staging path on the node.
func (ns *NodeServer) NodeStageVolume(ctx context.Context, req *csi.NodeStageVolumeRequest) (*csi.NodeStageVolumeResponse, error) {
if err := util.ValidateNodeStageVolumeRequest(req); err != nil {
return nil, err
}
if !notMnt {
return &csi.NodePublishVolumeResponse{}, nil
}
stagingTargetPath := req.GetStagingTargetPath()
isBlock := req.GetVolumeCapability().GetBlock() != nil
disableInUseChecks := false
// MULTI_NODE_MULTI_WRITER is supported by default for Block access type volumes
if req.VolumeCapability.AccessMode.Mode == csi.VolumeCapability_AccessMode_MULTI_NODE_MULTI_WRITER {
if isBlock {
@ -104,114 +60,215 @@ func (ns *NodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublis
}
}
volID := req.GetVolumeId()
cr, err := util.GetUserCredentials(req.GetSecrets())
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
isLegacyVolume := false
volName, err := getVolumeName(req.GetVolumeId())
if err != nil {
// error ErrInvalidVolID may mean this is an 1.0.0 version volume, check for name
// pattern match in addition to error to ensure this is a likely v1.0.0 volume
if _, ok := err.(ErrInvalidVolID); !ok || !isLegacyVolumeID(req.GetVolumeId()) {
return nil, status.Error(codes.InvalidArgument, err.Error())
}
volName, err = getLegacyVolumeName(req.GetStagingTargetPath())
if err != nil {
return nil, status.Error(codes.InvalidArgument, err.Error())
}
isLegacyVolume = true
}
if isBlock {
stagingTargetPath += "/" + volID
}
idLk := nodeVolumeIDLocker.Lock(volID)
defer nodeVolumeIDLocker.Unlock(idLk, volID)
// Check if that target path exists properly
isNotMnt, err := ns.createMountPath(stagingTargetPath, isBlock)
if err != nil {
klog.Errorf("stat failed: %v", err)
return nil, status.Error(codes.Internal, err.Error())
}
if !isNotMnt {
klog.Infof("rbd: volume %s is already mounted to %s, skipping", req.GetVolumeId(), stagingTargetPath)
return &csi.NodeStageVolumeResponse{}, nil
}
volOptions, err := genVolFromVolumeOptions(req.GetVolumeContext(), req.GetSecrets(), disableInUseChecks, isLegacyVolume)
if err != nil {
return nil, err
return nil, status.Error(codes.Internal, err.Error())
}
volOptions.RbdImageName = volName
// Mapping RBD image
devicePath, err := attachRBDImage(volOptions, cr)
if err != nil {
return nil, err
return nil, status.Error(codes.Internal, err.Error())
}
klog.V(4).Infof("rbd image: %s/%s was successfully mapped at %s\n", req.GetVolumeId(), volOptions.Pool, devicePath)
// Publish Path
err = ns.mountVolume(req, devicePath)
if err != nil {
return nil, err
}
err = os.Chmod(targetPath, 0777)
// nodeStage Path
err = ns.mountVolumeToStagePath(req, stagingTargetPath, devicePath)
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
err = os.Chmod(stagingTargetPath, 0777)
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
klog.Infof("rbd: successfully mounted volume %s to stagingTargetPath %s", req.GetVolumeId(), stagingTargetPath)
return &csi.NodeStageVolumeResponse{}, nil
}
// NodePublishVolume mounts the volume mounted to the device path to the target
// path
func (ns *NodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublishVolumeRequest) (*csi.NodePublishVolumeResponse, error) {
err := util.ValidateNodePublishVolumeRequest(req)
if err != nil {
return nil, err
}
targetPath := req.GetTargetPath()
isBlock := req.GetVolumeCapability().GetBlock() != nil
stagingPath := req.GetStagingTargetPath()
if isBlock {
stagingPath += "/" + req.GetVolumeId()
}
idLk := targetPathLocker.Lock(targetPath)
defer targetPathLocker.Unlock(idLk, targetPath)
// Check if that target path exists properly
notMnt, err := ns.createMountPath(targetPath, isBlock)
if err != nil {
return nil, err
}
if !notMnt {
return &csi.NodePublishVolumeResponse{}, nil
}
// Publish Path
err = ns.mountVolume(stagingPath, req)
if err != nil {
return nil, err
}
klog.Infof("rbd: successfully mounted stagingPath %s to targetPath %s", stagingPath, targetPath)
return &csi.NodePublishVolumeResponse{}, nil
}
func getVolumeName(req *csi.NodePublishVolumeRequest) (string, error) {
func getVolumeName(volID string) (string, error) {
var vi util.CSIIdentifier
err := vi.DecomposeCSIID(req.GetVolumeId())
err := vi.DecomposeCSIID(volID)
if err != nil {
err = fmt.Errorf("error decoding volume ID (%s) (%s)", err, req.GetVolumeId())
err = fmt.Errorf("error decoding volume ID (%s) (%s)", err, volID)
return "", ErrInvalidVolID{err}
}
return volJournal.NamingPrefix() + vi.ObjectUUID, nil
}
func getLegacyVolumeName(req *csi.NodePublishVolumeRequest) (string, error) {
func getLegacyVolumeName(mountPath string) (string, error) {
var volName string
isBlock := req.GetVolumeCapability().GetBlock() != nil
targetPath := req.GetTargetPath()
if isBlock {
// Get volName from targetPath
s := strings.Split(targetPath, "/")
volName = s[len(s)-1]
} else {
// Get volName from targetPath
if !strings.HasSuffix(targetPath, "/mount") {
return "", fmt.Errorf("rbd: malformed value of target path: %s", targetPath)
}
s := strings.Split(strings.TrimSuffix(targetPath, "/mount"), "/")
if strings.HasSuffix(mountPath, "/globalmount") {
s := strings.Split(strings.TrimSuffix(mountPath, "/globalmount"), "/")
volName = s[len(s)-1]
return volName, nil
}
if strings.HasSuffix(mountPath, "/mount") {
s := strings.Split(strings.TrimSuffix(mountPath, "/mount"), "/")
volName = s[len(s)-1]
return volName, nil
}
// get volume name for block volume
s := strings.Split(mountPath, "/")
if len(s) == 0 {
return "", fmt.Errorf("rbd: malformed value of stage target path: %s", mountPath)
}
volName = s[len(s)-1]
return volName, nil
}
func (ns *NodeServer) mountVolume(req *csi.NodePublishVolumeRequest, devicePath string) error {
func (ns *NodeServer) mountVolumeToStagePath(req *csi.NodeStageVolumeRequest, stagingPath, devicePath string) error {
// Publish Path
fsType := req.GetVolumeCapability().GetMount().GetFsType()
diskMounter := &mount.SafeFormatAndMount{Interface: ns.mounter, Exec: mount.NewOsExec()}
opt := []string{}
isBlock := req.GetVolumeCapability().GetBlock() != nil
var err error
if isBlock {
opt = append(opt, "bind")
err = diskMounter.Mount(devicePath, stagingPath, fsType, opt)
} else {
err = diskMounter.FormatAndMount(devicePath, stagingPath, fsType, opt)
}
if err != nil {
klog.Errorf("failed to mount device path (%s) to staging path (%s) for volume (%s) error %s", devicePath, stagingPath, req.GetVolumeId(), err)
}
return err
}
func (ns *NodeServer) mountVolume(stagingPath string, req *csi.NodePublishVolumeRequest) error {
// Publish Path
fsType := req.GetVolumeCapability().GetMount().GetFsType()
readOnly := req.GetReadonly()
attrib := req.GetVolumeContext()
mountFlags := req.GetVolumeCapability().GetMount().GetMountFlags()
isBlock := req.GetVolumeCapability().GetBlock() != nil
targetPath := req.GetTargetPath()
klog.V(4).Infof("target %v\nisBlock %v\nfstype %v\ndevice %v\nreadonly %v\nattributes %v\n mountflags %v\n",
targetPath, isBlock, fsType, devicePath, readOnly, attrib, mountFlags)
diskMounter := &mount.SafeFormatAndMount{Interface: ns.mounter, Exec: mount.NewOsExec()}
if isBlock {
klog.V(4).Infof("target %v\nisBlock %v\nfstype %v\nstagingPath %v\nreadonly %v\nmountflags %v\n",
targetPath, isBlock, fsType, stagingPath, readOnly, mountFlags)
mountFlags = append(mountFlags, "bind")
if err := diskMounter.Mount(devicePath, targetPath, fsType, mountFlags); err != nil {
return err
}
} else {
if readOnly {
mountFlags = append(mountFlags, "ro")
}
if err := diskMounter.FormatAndMount(devicePath, targetPath, fsType, mountFlags); err != nil {
return err
if isBlock {
if err := util.Mount(stagingPath, targetPath, fsType, mountFlags); err != nil {
return status.Error(codes.Internal, err.Error())
}
} else {
if err := util.Mount(stagingPath, targetPath, "", mountFlags); err != nil {
return status.Error(codes.Internal, err.Error())
}
}
return nil
}
func (ns *NodeServer) createTargetPath(targetPath string, isBlock bool) (bool, error) {
// Check if that target path exists properly
notMnt, err := mount.IsNotMountPoint(ns.mounter, targetPath)
func (ns *NodeServer) createMountPath(mountPath string, isBlock bool) (bool, error) {
// Check if that mount path exists properly
notMnt, err := mount.IsNotMountPoint(ns.mounter, mountPath)
if err != nil {
if os.IsNotExist(err) {
if isBlock {
// create an empty file
// #nosec
targetPathFile, e := os.OpenFile(targetPath, os.O_CREATE|os.O_RDWR, 0750)
pathFile, e := os.OpenFile(mountPath, os.O_CREATE|os.O_RDWR, 0750)
if e != nil {
klog.V(4).Infof("Failed to create targetPath:%s with error: %v", targetPath, err)
klog.V(4).Infof("Failed to create mountPath:%s with error: %v", mountPath, err)
return notMnt, status.Error(codes.Internal, e.Error())
}
if err = targetPathFile.Close(); err != nil {
klog.V(4).Infof("Failed to close targetPath:%s with error: %v", targetPath, err)
if err = pathFile.Close(); err != nil {
klog.V(4).Infof("Failed to close mountPath:%s with error: %v", mountPath, err)
return notMnt, status.Error(codes.Internal, err.Error())
}
} else {
// Create a directory
if err = os.MkdirAll(targetPath, 0750); err != nil {
if err = util.CreateMountPoint(mountPath); err != nil {
return notMnt, status.Error(codes.Internal, err.Error())
}
}
@ -226,18 +283,12 @@ func (ns *NodeServer) createTargetPath(targetPath string, isBlock bool) (bool, e
// NodeUnpublishVolume unmounts the volume from the target path
func (ns *NodeServer) NodeUnpublishVolume(ctx context.Context, req *csi.NodeUnpublishVolumeRequest) (*csi.NodeUnpublishVolumeResponse, error) {
err := util.ValidateNodeUnpublishVolumeRequest(req)
if err != nil {
return nil, err
}
targetPath := req.GetTargetPath()
if targetPath == "" {
return nil, status.Error(codes.InvalidArgument, "empty target path in request")
}
if req.GetVolumeId() == "" {
return nil, status.Error(codes.InvalidArgument, "empty volume ID in request")
}
idLk := targetPathLocker.Lock(targetPath)
defer targetPathLocker.Unlock(idLk, targetPath)
notMnt, err := mount.IsNotMountPoint(ns.mounter, targetPath)
if err != nil {
if os.IsNotExist(err) {
@ -248,21 +299,75 @@ func (ns *NodeServer) NodeUnpublishVolume(ctx context.Context, req *csi.NodeUnpu
return nil, status.Error(codes.NotFound, err.Error())
}
if notMnt {
// TODO should consider deleting path instead of returning error,
// once all codes become ready for csi 1.0.
return nil, status.Error(codes.NotFound, "volume not mounted")
if err = os.RemoveAll(targetPath); err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
return &csi.NodeUnpublishVolumeResponse{}, nil
}
devicePath, cnt, err := mount.GetDeviceNameFromMount(ns.mounter, targetPath)
if err = ns.mounter.Unmount(targetPath); err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
if err = os.RemoveAll(targetPath); err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
klog.Infof("rbd: successfully unbinded volume %s from %s", req.GetVolumeId(), targetPath)
return &csi.NodeUnpublishVolumeResponse{}, nil
}
// NodeUnstageVolume unstages the volume from the staging path
func (ns *NodeServer) NodeUnstageVolume(ctx context.Context, req *csi.NodeUnstageVolumeRequest) (*csi.NodeUnstageVolumeResponse, error) {
var err error
if err = util.ValidateNodeUnstageVolumeRequest(req); err != nil {
return nil, err
}
stagingTargetPath := req.GetStagingTargetPath()
// kind of hack to unmount block volumes
blockStagingPath := stagingTargetPath + "/" + req.GetVolumeId()
unmount:
notMnt, err := mount.IsNotMountPoint(ns.mounter, stagingTargetPath)
if err != nil {
if os.IsNotExist(err) {
// staging targetPath has already been deleted
klog.V(4).Infof("stagingTargetPath: %s has already been deleted", stagingTargetPath)
return &csi.NodeUnstageVolumeResponse{}, nil
}
return nil, status.Error(codes.NotFound, err.Error())
}
if notMnt {
_, err = os.Stat(blockStagingPath)
if err == nil && (stagingTargetPath != blockStagingPath) {
stagingTargetPath = blockStagingPath
goto unmount
}
if err = os.RemoveAll(stagingTargetPath); err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
return &csi.NodeUnstageVolumeResponse{}, nil
}
// Unmount the volume
devicePath, cnt, err := mount.GetDeviceNameFromMount(ns.mounter, stagingTargetPath)
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
if err = ns.unmount(targetPath, devicePath, cnt); err != nil {
if err = ns.unmount(stagingTargetPath, devicePath, cnt); err != nil {
return nil, err
}
return &csi.NodeUnpublishVolumeResponse{}, nil
if err = os.RemoveAll(stagingTargetPath); err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
klog.Infof("rbd: successfully unmounted volume %s from %s", req.GetVolumeId(), stagingTargetPath)
return &csi.NodeUnstageVolumeResponse{}, nil
}
func (ns *NodeServer) unmount(targetPath, devicePath string, cnt int) error {
@ -299,14 +404,15 @@ func (ns *NodeServer) unmount(targetPath, devicePath string, cnt int) error {
// Unmapping rbd device
if err = detachRBDDevice(devicePath); err != nil {
klog.V(3).Infof("failed to unmap rbd device: %s with error: %v", devicePath, err)
return err
return status.Error(codes.Internal, err.Error())
}
// Remove targetPath
if err = os.RemoveAll(targetPath); err != nil {
klog.V(3).Infof("failed to remove targetPath: %s with error: %v", targetPath, err)
return status.Error(codes.Internal, err.Error())
}
return err
return nil
}
func resolveBindMountedBlockDevice(mountPath string) (string, error) {
// #nosec
@ -336,3 +442,18 @@ func parseFindMntResolveSource(out string) (string, error) {
}
return "", fmt.Errorf("parseFindMntResolveSource: %s doesn't match to any expected findMnt output", out)
}
// NodeGetCapabilities returns the supported capabilities of the node server
func (ns *NodeServer) NodeGetCapabilities(ctx context.Context, req *csi.NodeGetCapabilitiesRequest) (*csi.NodeGetCapabilitiesResponse, error) {
return &csi.NodeGetCapabilitiesResponse{
Capabilities: []*csi.NodeServiceCapability{
{
Type: &csi.NodeServiceCapability_Rpc{
Rpc: &csi.NodeServiceCapability_RPC{
Type: csi.NodeServiceCapability_RPC_STAGE_UNSTAGE_VOLUME,
},
},
},
},
}, nil
}

5
pkg/rbd/rbd_attach.go
View File

@ -231,8 +231,6 @@ func attachRBDImage(volOptions *rbdVolume, cr *util.Credentials) (string, error)
var err error
image := volOptions.RbdImageName
imagePath := fmt.Sprintf("%s/%s", volOptions.Pool, image)
useNBD := false
moduleName := rbd
if volOptions.Mounter == rbdTonbd && hasNBD {
@ -242,9 +240,6 @@ func attachRBDImage(volOptions *rbdVolume, cr *util.Credentials) (string, error)
devicePath, found := waitForPath(volOptions.Pool, image, 1, useNBD)
if !found {
idLk := attachdetachLocker.Lock(imagePath)
defer attachdetachLocker.Unlock(idLk, imagePath)
_, err = execCommand("modprobe", []string{moduleName})
if err != nil {
klog.Warningf("rbd: failed to load rbd kernel module:%v", err)

8
pkg/rbd/rbd_util.go
View File

@ -90,16 +90,16 @@ type rbdSnapshot struct {
}
var (
// serializes operations based on "<rbd pool>/<rbd image>" as key
attachdetachLocker = util.NewIDLocker()
// serializes operations based on "volume name" as key
volumeNameLocker = util.NewIDLocker()
// serializes operations based on "snapshot name" as key
snapshotNameLocker = util.NewIDLocker()
// serializes operations based on "mount target path" as key
targetPathLocker = util.NewIDLocker()
// serializes delete operations on legacy volumes
legacyVolumeIDLocker = util.NewIDLocker()
// serializes operations based on "mount staging path" as key
nodeVolumeIDLocker = util.NewIDLocker()
// serializes operations based on "mount target path" as key
targetPathLocker = util.NewIDLocker()
supportedFeatures = sets.NewString("layering")
)

33
pkg/util/util.go
View File

@ -22,8 +22,11 @@ import (
"strings"
"github.com/pkg/errors"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"k8s.io/apimachinery/pkg/util/validation"
"k8s.io/klog"
"k8s.io/kubernetes/pkg/util/mount"
)
// remove this once kubernetes v1.14.0 release is done
@ -58,12 +61,12 @@ func roundUpSize(volumeSizeBytes, allocationUnitBytes int64) int64 {
// CreatePersistanceStorage creates storage path and initializes new cache
func CreatePersistanceStorage(sPath, metaDataStore, driverName string) (CachePersister, error) {
var err error
if err = createPersistentStorage(path.Join(sPath, "controller")); err != nil {
if err = CreateMountPoint(path.Join(sPath, "controller")); err != nil {
klog.Errorf("failed to create persistent storage for controller: %v", err)
return nil, err
}
if err = createPersistentStorage(path.Join(sPath, "node")); err != nil {
if err = CreateMountPoint(path.Join(sPath, "node")); err != nil {
klog.Errorf("failed to create persistent storage for node: %v", err)
return nil, err
}
@ -76,10 +79,6 @@ func CreatePersistanceStorage(sPath, metaDataStore, driverName string) (CachePer
return cp, err
}
func createPersistentStorage(persistentStoragePath string) error {
return os.MkdirAll(persistentStoragePath, os.FileMode(0755))
}
// ValidateDriverName validates the driver name
func ValidateDriverName(driverName string) error {
if driverName == "" {
@ -120,3 +119,25 @@ func GenerateVolID(monitors string, cr *Credentials, pool, clusterID, objUUID st
return volID, err
}
// CreateMountPoint creates the directory with given path
func CreateMountPoint(mountPath string) error {
return os.MkdirAll(mountPath, 0750)
}
// IsMountPoint checks if the given path is mountpoint or not
func IsMountPoint(p string) (bool, error) {
dummyMount := mount.New("")
notMnt, err := dummyMount.IsLikelyNotMountPoint(p)
if err != nil {
return false, status.Error(codes.Internal, err.Error())
}
return !notMnt, nil
}
// Mount mounts the source to target path
func Mount(source, target, fstype string, options []string) error {
dummyMount := mount.New("")
return dummyMount.Mount(source, target, fstype, options)
}

75
pkg/util/validate.go Normal file
View File

@ -0,0 +1,75 @@
package util
import (
"github.com/container-storage-interface/spec/lib/go/csi"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
// ValidateNodeStageVolumeRequest validates the node stage request
func ValidateNodeStageVolumeRequest(req *csi.NodeStageVolumeRequest) error {
if req.GetVolumeCapability() == nil {
return status.Error(codes.InvalidArgument, "volume capability missing in request")
}
if req.GetVolumeId() == "" {
return status.Error(codes.InvalidArgument, "volume ID missing in request")
}
if req.GetStagingTargetPath() == "" {
return status.Error(codes.InvalidArgument, "staging target path missing in request")
}
if req.GetSecrets() == nil || len(req.GetSecrets()) == 0 {
return status.Error(codes.InvalidArgument, "stage secrets cannot be nil or empty")
}
return nil
}
// ValidateNodeUnstageVolumeRequest validates the node unstage request
func ValidateNodeUnstageVolumeRequest(req *csi.NodeUnstageVolumeRequest) error {
if req.GetVolumeId() == "" {
return status.Error(codes.InvalidArgument, "volume ID missing in request")
}
if req.GetStagingTargetPath() == "" {
return status.Error(codes.InvalidArgument, "staging target path missing in request")
}
return nil
}
// ValidateNodePublishVolumeRequest validates the node publish request
func ValidateNodePublishVolumeRequest(req *csi.NodePublishVolumeRequest) error {
if req.GetVolumeCapability() == nil {
return status.Error(codes.InvalidArgument, "volume capability missing in request")
}
if req.GetVolumeId() == "" {
return status.Error(codes.InvalidArgument, "volume ID missing in request")
}
if req.GetTargetPath() == "" {
return status.Error(codes.InvalidArgument, "target path missing in request")
}
if req.GetStagingTargetPath() == "" {
return status.Error(codes.InvalidArgument, "staging target path missing in request")
}
return nil
}
// ValidateNodeUnpublishVolumeRequest validates the node unpublish request
func ValidateNodeUnpublishVolumeRequest(req *csi.NodeUnpublishVolumeRequest) error {
if req.GetVolumeId() == "" {
return status.Error(codes.InvalidArgument, "volume ID missing in request")
}
if req.GetTargetPath() == "" {
return status.Error(codes.InvalidArgument, "target path missing in request")
}
return nil
}