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rbd: implement snapinfo with go-ceph

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moved snapinfo function from CLI to go-ceph
for better performance

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
This commit is contained in:
Madhu Rajanna 2020-06-24 12:44:23 +05:30 committed by mergify[bot]
parent b3f1499cd4
commit c30f91eead
1 changed files with 9 additions and 33 deletions
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42
internal/rbd/rbd_util.go
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@ -174,11 +174,6 @@ func (rs *rbdSnapshot) String() string {
return fmt.Sprintf("%s/%s@%s", rs.Pool, rs.RbdImageName, rs.RbdSnapName) return fmt.Sprintf("%s/%s@%s", rs.Pool, rs.RbdImageName, rs.RbdSnapName)
} }
// imageSpec returns the image-spec (pool/image) format of the snapshot
func (rs *rbdSnapshot) imageSpec() string {
return fmt.Sprintf("%s/%s", rs.Pool, rs.RbdImageName)
}
// createImage creates a new ceph image with provision and volume options. // createImage creates a new ceph image with provision and volume options.
func createImage(ctx context.Context, pOpts *rbdVolume, cr *util.Credentials) error { func createImage(ctx context.Context, pOpts *rbdVolume, cr *util.Credentials) error {
volSzMiB := fmt.Sprintf("%dM", util.RoundOffVolSize(pOpts.VolSize)) volSzMiB := fmt.Sprintf("%dM", util.RoundOffVolSize(pOpts.VolSize))
@ -809,45 +804,26 @@ getSnapInfo queries rbd about the snapshots of the given image and returns its m
returns ErrImageNotFound if provided image is not found, and ErrSnapNotFound if provided snap returns ErrImageNotFound if provided image is not found, and ErrSnapNotFound if provided snap
is not found in the images snapshot list is not found in the images snapshot list
*/ */
func (rs *rbdSnapshot) getSnapInfo(ctx context.Context, monitors string, cr *util.Credentials) (snapInfo, error) { func (rv *rbdVolume) getSnapInfo(rbdSnap *rbdSnapshot) (librbd.SnapInfo, error) {
// rbd --format=json snap ls [image-spec] invalidSnap := librbd.SnapInfo{}
image, err := rv.open()
var (
snpInfo snapInfo
snaps []snapInfo
)
stdout, stderr, err := util.ExecCommand(
"rbd",
"-m", monitors,
"--id", cr.ID,
"--keyfile="+cr.KeyFile,
"-c", util.CephConfigPath,
"--format="+"json",
"snap", "ls", rs.imageSpec())
if err != nil { if err != nil {
klog.Errorf(util.Log(ctx, "failed getting snap (%s) information from image (%s): (%s)"), return invalidSnap, err
rs.RbdSnapName, rs.imageSpec(), err)
if strings.Contains(string(stderr), "rbd: error opening image "+rs.RbdImageName+
": (2) No such file or directory") {
return snpInfo, ErrImageNotFound{rs.imageSpec(), err}
}
return snpInfo, err
} }
defer image.Close()
err = json.Unmarshal(stdout, &snaps) snaps, err := image.GetSnapshotNames()
if err != nil { if err != nil {
klog.Errorf(util.Log(ctx, "failed to parse JSON output of image snap list (%s): (%s)"), rs.imageSpec(), err) return invalidSnap, err
return snpInfo, fmt.Errorf("unmarshal failed: %+v. raw buffer response: %s", err, string(stdout))
} }
for _, snap := range snaps { for _, snap := range snaps {
if snap.Name == rs.RbdSnapName { if snap.Name == rbdSnap.RbdSnapName {
return snap, nil return snap, nil
} }
} }
return snpInfo, ErrSnapNotFound{rs.String(), fmt.Errorf("snap (%s) not found", rs)} return invalidSnap, ErrSnapNotFound{rbdSnap.RbdSnapName, fmt.Errorf("snap %s not found", rbdSnap.String())}
} }
// rbdImageMetadataStash strongly typed JSON spec for stashed RBD image metadata // rbdImageMetadataStash strongly typed JSON spec for stashed RBD image metadata