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Handle Delete operation if pool not found

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If the backend rbd or cephfs pool is already deleted
we need to return success to the  DeleteVolume RPC
call to make it idempotent.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
This commit is contained in:
Madhu Rajanna 2020-01-31 14:19:11 +05:30 committed by mergify[bot]
parent 034b123478
commit 8dcb6a6105
8 changed files with 144 additions and 7 deletions
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9
e2e/cephfs.go
View File

@ -207,6 +207,15 @@ var _ = Describe("cephfs", func() {
})
// Make sure this should be last testcase in this file, because
// it deletes pool
By("Create a PVC and Delete PVC when backend pool deleted", func() {
err := pvcDeleteWhenPoolNotFound(pvcPath, true, f)
if err != nil {
Fail(err.Error())
}
})
})
})

9
e2e/rbd.go
View File

@ -338,6 +338,15 @@ var _ = Describe("RBD", func() {
Fail(err.Error())
}
})
// Make sure this should be last testcase in this file, because
// it deletes pool
By("Create a PVC and Delete PVC when backend pool deleted", func() {
err := pvcDeleteWhenPoolNotFound(pvcPath, false, f)
if err != nil {
Fail(err.Error())
}
})
})
})

79
e2e/utils.go
View File

@ -572,7 +572,7 @@ func validatePVCAndAppBinding(pvcPath, appPath string, f *framework.Framework) {
}
}
func getRBDImageIds(pvcNamespace, pvcName string, f *framework.Framework) (string, string, error) {
func getImageInfoFromPVC(pvcNamespace, pvcName string, f *framework.Framework) (string, string, error) {
c := f.ClientSet.CoreV1()
pvc, err := c.PersistentVolumeClaims(pvcNamespace).Get(pvcName, metav1.GetOptions{})
if err != nil {
@ -634,7 +634,7 @@ func readVaultSecret(key string, f *framework.Framework) (string, string) {
func validateEncryptedPVCAndAppBinding(pvcPath, appPath, kms string, f *framework.Framework) {
pvc, app := createPVCAndAppBinding(pvcPath, appPath, f)
rbdImageID, rbdImageHandle, err := getRBDImageIds(pvc.Namespace, pvc.Name, f)
rbdImageID, rbdImageHandle, err := getImageInfoFromPVC(pvc.Namespace, pvc.Name, f)
if err != nil {
Fail(err.Error())
}
@ -826,7 +826,7 @@ func validateNormalUserPVCAccess(pvcPath string, f *framework.Framework) {
// }
func deleteBackingCephFSVolume(f *framework.Framework, pvc *v1.PersistentVolumeClaim) error {
volname, _, err := getRBDImageIds(pvc.Namespace, pvc.Name, f)
volname, _, err := getImageInfoFromPVC(pvc.Namespace, pvc.Name, f)
if err != nil {
return err
}
@ -919,3 +919,76 @@ func checkDataPersist(pvcPath, appPath string, f *framework.Framework) error {
err = deletePVCAndApp("", f, pvc, app)
return err
}
func deleteBackingRBDImage(f *framework.Framework, pvc *v1.PersistentVolumeClaim) error {
rbdImage, _, err := getImageInfoFromPVC(pvc.Namespace, pvc.Name, f)
if err != nil {
return err
}
opt := metav1.ListOptions{
LabelSelector: "app=rook-ceph-tools",
}
cmd := fmt.Sprintf("rbd rm %s --pool=replicapool", rbdImage)
execCommandInPod(f, cmd, rookNS, &opt)
return nil
}
func deletePool(name string, cephfs bool, f *framework.Framework) {
opt := metav1.ListOptions{
LabelSelector: "app=rook-ceph-tools",
}
var cmds = []string{}
if cephfs {
// ceph fs fail
// ceph fs rm myfs --yes-i-really-mean-it
// ceph osd pool delete myfs-metadata myfs-metadata
// --yes-i-really-mean-it
// ceph osd pool delete myfs-data0 myfs-data0
// --yes-i-really-mean-it
cmds = append(cmds, fmt.Sprintf("ceph fs fail %s", name),
fmt.Sprintf("ceph fs rm %s --yes-i-really-mean-it", name),
fmt.Sprintf("ceph osd pool delete %s-metadata %s-metadata --yes-i-really-really-mean-it", name, name),
fmt.Sprintf("ceph osd pool delete %s-data0 %s-data0 --yes-i-really-really-mean-it", name, name))
} else {
// ceph osd pool delete replicapool replicapool
// --yes-i-really-mean-it
cmds = append(cmds, fmt.Sprintf("ceph osd pool delete %s %s --yes-i-really-really-mean-it", name, name))
}
for _, cmd := range cmds {
// discard stdErr as some commands prints warning in strErr
execCommandInPod(f, cmd, rookNS, &opt)
}
}
func pvcDeleteWhenPoolNotFound(pvcPath string, cephfs bool, f *framework.Framework) error {
pvc, err := loadPVC(pvcPath)
if err != nil {
return err
}
pvc.Namespace = f.UniqueName
err = createPVCAndvalidatePV(f.ClientSet, pvc, deployTimeout)
if err != nil {
return err
}
if cephfs {
err = deleteBackingCephFSVolume(f, pvc)
if err != nil {
return err
}
// delete cephfs filesystem
deletePool("myfs", cephfs, f)
} else {
err = deleteBackingRBDImage(f, pvc)
if err != nil {
return err
}
// delete rbd pool
deletePool("replicapool", cephfs, f)
}
err = deletePVCAndValidatePV(f.ClientSet, pvc, deployTimeout)
return err
}

6
pkg/cephfs/cephfs_util.go
View File

@ -84,10 +84,10 @@ func getMetadataPool(ctx context.Context, monitors string, cr *util.Credentials,
}
}
return "", fmt.Errorf("fsName (%s) not found in Ceph cluster", fsName)
return "", util.ErrPoolNotFound{Pool: fsName, Err: fmt.Errorf("fsName (%s) not found in Ceph cluster", fsName)}
}
// CephFilesystemDetails is a representation of the main json structure returned by 'ceph fs dump'
// CephFilesystemDump is a representation of the main json structure returned by 'ceph fs dump'
type CephFilesystemDump struct {
Filesystems []CephFilesystemDetails `json:"filesystems"`
}
@ -114,5 +114,5 @@ func getFsName(ctx context.Context, monitors string, cr *util.Credentials, fscID
}
}
return "", fmt.Errorf("fscID (%d) not found in Ceph cluster", fscID)
return "", util.ErrPoolNotFound{Pool: string(fscID), Err: fmt.Errorf("fscID (%d) not found in Ceph cluster", fscID)}
}

6
pkg/cephfs/controllerserver.go
View File

@ -231,6 +231,12 @@ func (cs *ControllerServer) DeleteVolume(ctx context.Context, req *csi.DeleteVol
// Find the volume using the provided VolumeID
volOptions, vID, err := newVolumeOptionsFromVolID(ctx, string(volID), nil, secrets)
if err != nil {
// if error is ErrPoolNotFound, the pool is already deleted we dont
// need to worry about deleting subvolume or omap data, return success
if _, ok := err.(util.ErrPoolNotFound); ok {
klog.Warningf(util.Log(ctx, "failed to get backend volume for %s: %v"), string(volID), err)
return &csi.DeleteVolumeResponse{}, nil
}
// if error is ErrKeyNotFound, then a previous attempt at deletion was complete
// or partially complete (subvolume and imageOMap are garbage collected already), hence
// return success as deletion is complete

30
pkg/rbd/controllerserver.go
View File

@ -258,6 +258,12 @@ func (cs *ControllerServer) checkSnapshot(ctx context.Context, req *csi.CreateVo
if _, ok := err.(ErrSnapNotFound); !ok {
return status.Error(codes.Internal, err.Error())
}
if _, ok := err.(util.ErrPoolNotFound); ok {
klog.Errorf(util.Log(ctx, "failed to get backend snapshot for %s: %v"), snapshotID, err)
return status.Error(codes.InvalidArgument, err.Error())
}
return status.Error(codes.InvalidArgument, "missing requested Snapshot ID")
}
@ -344,6 +350,11 @@ func (cs *ControllerServer) DeleteVolume(ctx context.Context, req *csi.DeleteVol
rbdVol := &rbdVolume{}
if err = genVolFromVolID(ctx, rbdVol, volumeID, cr, req.GetSecrets()); err != nil {
if _, ok := err.(util.ErrPoolNotFound); ok {
klog.Warningf(util.Log(ctx, "failed to get backend volume for %s: %v"), volumeID, err)
return &csi.DeleteVolumeResponse{}, nil
}
// If error is ErrInvalidVolID it could be a version 1.0.0 or lower volume, attempt
// to process it as such
if _, ok := err.(ErrInvalidVolID); ok {
@ -360,6 +371,7 @@ func (cs *ControllerServer) DeleteVolume(ctx context.Context, req *csi.DeleteVol
// or partially complete (image and imageOMap are garbage collected already), hence return
// success as deletion is complete
if _, ok := err.(util.ErrKeyNotFound); ok {
klog.Warningf(util.Log(ctx, "Failed to volume options for %s: %v"), volumeID, err)
return &csi.DeleteVolumeResponse{}, nil
}
@ -458,6 +470,11 @@ func (cs *ControllerServer) CreateSnapshot(ctx context.Context, req *csi.CreateS
if _, ok := err.(ErrImageNotFound); ok {
return nil, status.Errorf(codes.NotFound, "source Volume ID %s not found", req.GetSourceVolumeId())
}
if _, ok := err.(util.ErrPoolNotFound); ok {
klog.Errorf(util.Log(ctx, "failed to get backend volume for %s: %v"), req.GetSourceVolumeId(), err)
return nil, status.Errorf(codes.Internal, err.Error())
}
return nil, status.Errorf(codes.Internal, err.Error())
}
@ -625,6 +642,13 @@ func (cs *ControllerServer) DeleteSnapshot(ctx context.Context, req *csi.DeleteS
rbdSnap := &rbdSnapshot{}
if err = genSnapFromSnapID(ctx, rbdSnap, snapshotID, cr); err != nil {
// if error is ErrPoolNotFound, the pool is already deleted we dont
// need to worry about deleting snapshot or omap data, return success
if _, ok := err.(util.ErrPoolNotFound); ok {
klog.Warningf(util.Log(ctx, "failed to get backend snapshot for %s: %v"), snapshotID, err)
return &csi.DeleteSnapshotResponse{}, nil
}
// if error is ErrKeyNotFound, then a previous attempt at deletion was complete
// or partially complete (snap and snapOMap are garbage collected already), hence return
// success as deletion is complete
@ -715,6 +739,12 @@ func (cs *ControllerServer) ControllerExpandVolume(ctx context.Context, req *csi
if _, ok := err.(ErrImageNotFound); ok {
return nil, status.Errorf(codes.NotFound, "volume ID %s not found", volID)
}
if _, ok := err.(util.ErrPoolNotFound); ok {
klog.Errorf(util.Log(ctx, "failed to get backend volume for %s: %v"), volID, err)
return nil, status.Errorf(codes.InvalidArgument, err.Error())
}
return nil, status.Errorf(codes.Internal, err.Error())
}

2
pkg/util/cephcmds.go
View File

@ -114,7 +114,7 @@ func GetPoolName(ctx context.Context, monitors string, cr *Credentials, poolID i
}
}
return "", fmt.Errorf("pool ID (%d) not found in Ceph cluster", poolID)
return "", ErrPoolNotFound{string(poolID), fmt.Errorf("pool ID (%d) not found in Ceph cluster", poolID)}
}
// SetOMapKeyValue sets the given key and value into the provided Ceph omap name

10
pkg/util/errors.go
View File

@ -56,3 +56,13 @@ type ErrSnapNameConflict struct {
func (e ErrSnapNameConflict) Error() string {
return e.err.Error()
}
// ErrPoolNotFound is returned when pool is not found
type ErrPoolNotFound struct {
Pool string
Err error
}
func (e ErrPoolNotFound) Error() string {
return e.Err.Error()
}