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rbd: use go-ceph to implement getImageInfo()

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Signed-off-by: Niels de Vos <ndevos@redhat.com>
This commit is contained in:
Niels de Vos 2020-01-15 14:06:03 +01:00 committed by mergify[bot]
parent 772d1dfa77
commit 824f38daaa
1 changed files with 17 additions and 40 deletions
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57
internal/rbd/rbd_util.go
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@ -380,15 +380,7 @@ func updateSnapWithImageInfo(ctx context.Context, rbdSnap *rbdSnapshot, cr *util
// updateVolWithImageInfo updates provided rbdVolume with information from on-disk data // updateVolWithImageInfo updates provided rbdVolume with information from on-disk data
// regarding the same // regarding the same
func updateVolWithImageInfo(ctx context.Context, rbdVol *rbdVolume, cr *util.Credentials) error { func updateVolWithImageInfo(ctx context.Context, rbdVol *rbdVolume, cr *util.Credentials) error {
imageInfo, err := rbdVol.getImageInfo(ctx, rbdVol.Monitors, cr) return rbdVol.getImageInfo()
if err != nil {
return err
}
rbdVol.VolSize = imageInfo.Size
rbdVol.ImageFeatures = strings.Join(imageInfo.Features, ",")
return nil
} }
// genSnapFromSnapID generates a rbdSnapshot structure from the provided identifier, updating // genSnapFromSnapID generates a rbdSnapshot structure from the provided identifier, updating
@ -835,45 +827,30 @@ func getSnapshotMetadata(ctx context.Context, pSnapOpts *rbdSnapshot, cr *util.C
return nil 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"`
}
// getImageInfo queries rbd about the given image and returns its metadata, and returns // getImageInfo queries rbd about the given image and returns its metadata, and returns
// ErrImageNotFound if provided image is not found // ErrImageNotFound if provided image is not found
func (rv *rbdVolume) getImageInfo(ctx context.Context, monitors string, cr *util.Credentials) (imageInfo, error) { func (rv *rbdVolume) getImageInfo() error {
// rbd --format=json info [image-spec | snap-spec] image, err := rv.open()
var imgInfo imageInfo
stdout, stderr, err := util.ExecCommand(
"rbd",
"-m", monitors,
"--id", cr.ID,
"--keyfile="+cr.KeyFile,
"-c", util.CephConfigPath,
"--format="+"json",
"info", rv.String())
if err != nil { if err != nil {
klog.Errorf(util.Log(ctx, "failed getting information for image (%s): (%s)"), rv, err) return err
if strings.Contains(string(stderr), "rbd: error opening image "+rv.RbdImageName+
": (2) No such file or directory") {
return imgInfo, ErrImageNotFound{rv.String(), err}
}
return imgInfo, err
} }
defer image.Close()
err = json.Unmarshal(stdout, &imgInfo) imageInfo, err := image.Stat()
if err != nil { if err != nil {
klog.Errorf(util.Log(ctx, "failed to parse JSON output of image info (%s): (%s)"), rv, err) return err
return imgInfo, fmt.Errorf("unmarshal failed: %+v. raw buffer response: %s", err, string(stdout))
} }
// TODO: can rv.VolSize not be a uint64? Or initialize it to -1?
rv.VolSize = int64(imageInfo.Size)
return imgInfo, nil features, err := image.GetFeatures()
if err != nil {
return err
}
fs := librbd.FeatureSet(features)
rv.ImageFeatures = strings.Join(fs.Names(), ",")
return nil
} }
// snapInfo strongly typed JSON spec for snap ls rbd output // snapInfo strongly typed JSON spec for snap ls rbd output