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rbd: implement rbd.updateVolWithImageInfo() with go-ceph

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updateVolWithImageInfo() is currently executing an rbd command
to get details about an RBD image. Replaced it with the
required go-ceph functions.

Signed-off-by: Mudit Agarwal <muagarwa@redhat.com>
This commit is contained in:
Mudit Agarwal 2020-08-23 13:59:44 +05:30 committed by mergify[bot]
parent d928782ebf
commit 8c2bdbc001
1 changed files with 27 additions and 60 deletions
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87
internal/rbd/rbd_util.go
View File

@ -900,64 +900,6 @@ func (rv *rbdVolume) cloneRbdImageFromSnapshot(ctx context.Context, pSnapOpts *r
return nil
}
// imageInfo strongly typed JSON spec for image info.
type imageInfo struct {
ObjectUUID string `json:"name"`
Size int64 `json:"size"`
Features []string `json:"features"`
CreatedAt string `json:"create_timestamp"`
Parent parentInfo `json:"parent"`
}
// parentInfo spec for parent volume info.
type parentInfo struct {
Image string `json:"image"`
Pool string `json:"pool"`
Snapshot string `json:"snapshost"`
}
// updateVolWithImageInfo updates provided rbdVolume with information from on-disk data
// regarding the same.
func (rv *rbdVolume) updateVolWithImageInfo(cr *util.Credentials) error {
// rbd --format=json info [image-spec | snap-spec]
var imgInfo imageInfo
stdout, stderr, err := util.ExecCommand(
context.TODO(),
"rbd",
"-m", rv.Monitors,
"--id", cr.ID,
"--keyfile="+cr.KeyFile,
"-c", util.CephConfigPath,
"--format="+"json",
"info", rv.String())
if err != nil {
util.ErrorLogMsg("failed getting information for image (%s): (%s)", rv, err)
if strings.Contains(stderr, "rbd: error opening image "+rv.RbdImageName+
": (2) No such file or directory") {
return util.JoinErrors(ErrImageNotFound, err)
}
return err
}
err = json.Unmarshal([]byte(stdout), &imgInfo)
if err != nil {
util.ErrorLogMsg("failed to parse JSON output of image info (%s): (%s)", rv, err)
return fmt.Errorf("unmarshal failed: %+v. raw buffer response: %s", err, stdout)
}
rv.VolSize = imgInfo.Size
rv.ParentName = imgInfo.Parent.Image
tm, err := time.Parse(time.ANSIC, imgInfo.CreatedAt)
if err != nil {
return err
}
rv.CreatedAt, err = ptypes.TimestampProto(tm)
return err
}
// getImageInfo queries rbd about the given image and returns its metadata, and returns
// ErrImageNotFound if provided image is not found.
func (rv *rbdVolume) getImageInfo() error {
@ -979,11 +921,36 @@ func (rv *rbdVolume) getImageInfo() error {
return err
}
rv.imageFeatureSet = librbd.FeatureSet(features)
err = rv.updateVolWithImageInfo(rv.conn.Creds)
// Get parent information.
// TODO: Replace GetParentInfo() after
// https://github.com/ceph/go-ceph/issues/347 is fixed.
parentPool := make([]byte, 128)
parentName := make([]byte, 128)
parentSnapname := make([]byte, 128)
err = image.GetParentInfo(parentPool, parentName, parentSnapname)
if err != nil {
// Caller should decide whether not finding
// the parent is an error or not.
if strings.Contains(err.Error(), "No such file or directory") {
rv.ParentName = ""
} else {
return err
}
} else {
rv.ParentName = string(parentName)
}
// Get image creation time
tm, err := image.GetCreateTimestamp()
if err != nil {
return err
}
t := time.Unix(tm.Sec, tm.Nsec)
protoTime, err := ptypes.TimestampProto(t)
if err != nil {
return err
}
rv.CreatedAt = protoTime
return nil
}