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Making VolumeID != volName as per CSI spec

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This commit is contained in:
Serguei Bezverkhi 2018-01-15 20:52:28 -05:00
parent 0215b385d3
commit 8614aee8ef
4 changed files with 50 additions and 30 deletions
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deploy/docker/rbdplugin
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37
pkg/rbd/controllerserver.go
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@ -48,12 +48,20 @@ func (cs *controllerServer) CreateVolume(ctx context.Context, req *csi.CreateVol
glog.V(3).Infof("invalid create volume req: %v", req)
return nil, err
}
// Volume Name
volName := req.GetName()
if len(volName) == 0 {
volName = uuid.NewUUID().String()
volOptions, err := getRBDVolumeOptions(req.Parameters, cs.clientSet)
if err != nil {
return nil, err
}
// Generating Volume Name and Volume ID, as accoeding to CSI spec they MUST be different
volName := req.GetName()
uniqueID := uuid.NewUUID().String()
if len(volName) == 0 {
volName = volOptions.Pool + "-dynamic-pvc-" + uniqueID
}
volOptions.VolName = volName
volumeID := "csi-rbd-" + uniqueID
// Volume Size - Default is 1 GiB
volSizeBytes := int64(oneGB)
if req.GetCapacityRange() != nil {
@ -61,14 +69,10 @@ func (cs *controllerServer) CreateVolume(ctx context.Context, req *csi.CreateVol
}
volSizeGB := int(volSizeBytes / 1024 / 1024 / 1024)
volOptions, err := getRBDVolumeOptions(req.Parameters, cs.clientSet)
if err != nil {
return nil, err
}
// Check if there is already RBD image with requested name
found, _, _ := rbdStatus(volName, volOptions)
found, _, _ := rbdStatus(volOptions)
if !found {
if err := createRBDImage(volName, volSizeGB, volOptions); err != nil {
if err := createRBDImage(volOptions, volSizeGB); err != nil {
if err != nil {
glog.Warningf("failed to create volume: %v", err)
return nil, err
@ -78,13 +82,13 @@ func (cs *controllerServer) CreateVolume(ctx context.Context, req *csi.CreateVol
}
// Storing volInfo into a persistent file, will need info to delete rbd image
// in ControllerUnpublishVolume
if err := persistVolInfo(volName, path.Join(PluginFolder, "controller"), volOptions); err != nil {
if err := persistVolInfo(volumeID, path.Join(PluginFolder, "controller"), volOptions); err != nil {
glog.Warningf("rbd: failed to store volInfo with error: %v", err)
}
return &csi.CreateVolumeResponse{
VolumeInfo: &csi.VolumeInfo{
Id: volName,
Id: volumeID,
CapacityBytes: uint64(volSizeBytes),
Attributes: req.GetParameters(),
},
@ -112,12 +116,13 @@ func (cs *controllerServer) ValidateVolumeCapabilities(ctx context.Context, req
func (cs *controllerServer) ControllerUnpublishVolume(ctx context.Context, req *csi.ControllerUnpublishVolumeRequest) (*csi.ControllerUnpublishVolumeResponse, error) {
// For now the image get unconditionally deleted, but here retention policy can be checked
volName := req.GetVolumeId()
volumeID := req.GetVolumeId()
volOptions := &rbdVolumeOptions{}
if err := loadVolInfo(volName, path.Join(PluginFolder, "controller"), volOptions); err != nil {
if err := loadVolInfo(volumeID, path.Join(PluginFolder, "controller"), volOptions); err != nil {
return nil, err
}
volName := volOptions.VolName
// Recover rbd secret key value, for now by k8s specific call
id := volOptions.AdminID
secretName := volOptions.AdminSecretName
@ -134,12 +139,12 @@ func (cs *controllerServer) ControllerUnpublishVolume(ctx context.Context, req *
// Deleting rbd image
glog.V(4).Infof("deleting volume %s", volName)
if err := deleteRBDImage(volName, volOptions); err != nil {
if err := deleteRBDImage(volOptions); err != nil {
glog.V(3).Infof("failed to delete rbd image: %s/%s with error: %v", volOptions.Pool, volName, err)
return nil, err
}
// Removing persistent storage file for the unmapped volume
if err := deleteVolInfo(volName, path.Join(PluginFolder, "controller")); err != nil {
if err := deleteVolInfo(volumeID, path.Join(PluginFolder, "controller")); err != nil {
return nil, err
}

23
pkg/rbd/nodeserver.go
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@ -17,8 +17,10 @@ limitations under the License.
package rbd
import (
"fmt"
"os"
"path"
"strings"
"github.com/golang/glog"
"golang.org/x/net/context"
@ -40,6 +42,12 @@ type nodeServer struct {
func (ns *nodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublishVolumeRequest) (*csi.NodePublishVolumeResponse, error) {
targetPath := req.GetTargetPath()
if !strings.HasSuffix(targetPath, "/mount") {
return nil, fmt.Errorf("rnd: malformed the value of target path: %s", targetPath)
}
s := strings.Split(strings.TrimSuffix(targetPath, "/mount"), "/")
volName := s[len(s)-1]
notMnt, err := mount.New("").IsLikelyNotMountPoint(targetPath)
if err != nil {
if os.IsNotExist(err) {
@ -59,9 +67,9 @@ func (ns *nodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublis
if err != nil {
return nil, err
}
volOptions.VolName = volName
// Mapping RBD image
devicePath, err := attachRBDImage(req.GetVolumeId(), volOptions)
devicePath, err := attachRBDImage(volOptions)
if err != nil {
return nil, err
}
@ -86,7 +94,7 @@ func (ns *nodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublis
}
// Storing rbd device path
volOptions.ImageMapping = map[string]string{req.GetVolumeId(): devicePath}
volOptions.ImageMapping = map[string]string{volOptions.VolName: devicePath}
// Storing volInfo into a persistent file
if err := persistVolInfo(req.GetVolumeId(), path.Join(PluginFolder, "node"), volOptions); err != nil {
glog.Warningf("rbd: failed to store volInfo with error: %v", err)
@ -97,11 +105,12 @@ func (ns *nodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublis
func (ns *nodeServer) NodeUnpublishVolume(ctx context.Context, req *csi.NodeUnpublishVolumeRequest) (*csi.NodeUnpublishVolumeResponse, error) {
targetPath := req.GetTargetPath()
volName := req.GetVolumeId()
volumeID := req.GetVolumeId()
volOptions := &rbdVolumeOptions{}
if err := loadVolInfo(volName, path.Join(PluginFolder, "node"), volOptions); err != nil {
if err := loadVolInfo(volumeID, path.Join(PluginFolder, "node"), volOptions); err != nil {
return nil, err
}
volName := volOptions.VolName
// Recover rbd secret key value, for now by k8s specific call
id := volOptions.AdminID
@ -131,12 +140,12 @@ func (ns *nodeServer) NodeUnpublishVolume(ctx context.Context, req *csi.NodeUnpu
}
// Unmapping rbd device
glog.V(4).Infof("deleting volume %s", volName)
if err := detachRBDImage(volName, volOptions); err != nil {
if err := detachRBDImage(volOptions); err != nil {
glog.V(3).Infof("failed to unmap rbd device: %s with error: %v", volOptions.ImageMapping[volName], err)
return nil, err
}
// Removing persistent storage file for the unmapped volume
if err := deleteVolInfo(volName, path.Join(PluginFolder, "node")); err != nil {
if err := deleteVolInfo(volumeID, path.Join(PluginFolder, "node")); err != nil {
return nil, err
}

20
pkg/rbd/rbd_util.go
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@ -47,6 +47,7 @@ const (
)
type rbdVolumeOptions struct {
VolName string `json:"volName"`
Monitors string `json:"monitors"`
Pool string `json:"pool"`
AdminSecretName string `json:"adminSecret"`
@ -65,12 +66,13 @@ type rbdVolumeOptions struct {
var attachdetachMutex = keymutex.NewKeyMutex()
// CreateImage creates a new ceph image with provision and volume options.
func createRBDImage(image string, volSz int, pOpts *rbdVolumeOptions) error {
func createRBDImage(pOpts *rbdVolumeOptions, volSz int) error {
var output []byte
var err error
// rbd create
mon := pOpts.Monitors
image := pOpts.VolName
volSzGB := fmt.Sprintf("%dG", volSz)
if pOpts.ImageFormat == rbdImageFormat2 {
@ -96,11 +98,12 @@ func createRBDImage(image string, volSz int, pOpts *rbdVolumeOptions) error {
// rbdStatus checks if there is watcher on the image.
// It returns true if there is a watcher onthe image, otherwise returns false.
func rbdStatus(image string, b *rbdVolumeOptions) (bool, string, error) {
func rbdStatus(b *rbdVolumeOptions) (bool, string, error) {
var err error
var output string
var cmd []byte
image := b.VolName
// If we don't have admin id/secret (e.g. attaching), fallback to user id/secret.
id := b.AdminID
secret := b.adminSecret
@ -137,9 +140,10 @@ func rbdStatus(image string, b *rbdVolumeOptions) (bool, string, error) {
}
// DeleteImage deletes a ceph image with provision and volume options.
func deleteRBDImage(image string, b *rbdVolumeOptions) error {
func deleteRBDImage(b *rbdVolumeOptions) error {
var output []byte
found, _, err := rbdStatus(image, b)
image := b.VolName
found, _, err := rbdStatus(b)
if err != nil {
return err
}
@ -242,10 +246,11 @@ func parseStorageClassSecret(secretName string, namespace string, client *kubern
return secret, nil
}
func attachRBDImage(image string, volOptions *rbdVolumeOptions) (string, error) {
func attachRBDImage(volOptions *rbdVolumeOptions) (string, error) {
var err error
var output []byte
image := volOptions.VolName
devicePath, found := waitForPath(volOptions.Pool, image, 1)
if !found {
attachdetachMutex.LockKey(string(volOptions.Pool + image))
@ -262,7 +267,7 @@ func attachRBDImage(image string, volOptions *rbdVolumeOptions) (string, error)
Steps: rbdImageWatcherSteps,
}
err := wait.ExponentialBackoff(backoff, func() (bool, error) {
used, rbdOutput, err := rbdStatus(image, volOptions)
used, rbdOutput, err := rbdStatus(volOptions)
if err != nil {
return false, fmt.Errorf("fail to check rbd image status with: (%v), rbd output: (%s)", err, rbdOutput)
}
@ -301,10 +306,11 @@ func attachRBDImage(image string, volOptions *rbdVolumeOptions) (string, error)
return devicePath, nil
}
func detachRBDImage(image string, volOptions *rbdVolumeOptions) error {
func detachRBDImage(volOptions *rbdVolumeOptions) error {
var err error
var output []byte
image := volOptions.VolName
glog.V(1).Infof("rbd: unmap device %s", volOptions.ImageMapping[image])
// If we don't have admin id/secret (e.g. attaching), fallback to user id/secret.
id := volOptions.AdminID