[ceph-users] Move rdb based image from one pool to another

Jason Dillaman jdillama at redhat.com
Wed Nov 7 11:55:20 PST 2018


There was a bug in "rbd import" where it disallowed the use of stdin
for export-format 2. This has been fixed in v12.2.9 and is in the
pending 13.2.3 release.
On Wed, Nov 7, 2018 at 2:46 PM Uwe Sauter <uwe.sauter.de at gmail.com> wrote:
>
> I tried that but it fails:
>
> # rbd export --export-format 2 vms/vm-102-disk-2 - | rbd import --export-format 2 - vdisks/vm-102-disk-2
> rbd: import header failed.
> Importing image: 0% complete...failed.
> rbd: import failed: (22) Invalid argument
> Exporting image: 0% complete...failed.
> rbd: export error: (32) Broken pipe
>
>
> But the version seems to support that option:
>
> # rbd help import
> usage: rbd import [--path <path>] [--dest-pool <dest-pool>] [--dest <dest>]
>                    [--image-format <image-format>] [--new-format]
>                    [--order <order>] [--object-size <object-size>]
>                    [--image-feature <image-feature>] [--image-shared]
>                    [--stripe-unit <stripe-unit>]
>                    [--stripe-count <stripe-count>] [--data-pool <data-pool>]
>                    [--journal-splay-width <journal-splay-width>]
>                    [--journal-object-size <journal-object-size>]
>                    [--journal-pool <journal-pool>]
>                    [--sparse-size <sparse-size>] [--no-progress]
>                    [--export-format <export-format>] [--pool <pool>]
>                    [--image <image>]
>                    <path-name> <dest-image-spec>
>
>
>
>
>
> Am 07.11.18 um 20:41 schrieb Jason Dillaman:
> > If your CLI supports "--export-format 2", you can just do "rbd export
> > --export-format 2 vms/vm-102-disk2 - | rbd import --export-format 2 -
> > vdisks/vm-102-disk-2" (you need to specify the data format on import
> > otherwise it will assume it's copying a raw image).
> > On Wed, Nov 7, 2018 at 2:38 PM Uwe Sauter <uwe.sauter.de at gmail.com> wrote:
> >>
> >> I've been reading a bit and trying around but it seems I'm not quite where I want to be.
> >>
> >> I want to migrate from pool "vms" to pool "vdisks".
> >>
> >> # ceph osd pool ls
> >> vms
> >> vdisks
> >>
> >> # rbd ls vms
> >> vm-101-disk-1
> >> vm-101-disk-2
> >> vm-102-disk-1
> >> vm-102-disk-2
> >>
> >> # rbd snap ls vms/vm-102-disk-2
> >> SNAPID NAME     SIZE TIMESTAMP
> >>       81 SL6_81 100GiB Thu Aug 23 11:57:05 2018
> >>       92 SL6_82 100GiB Fri Oct 12 13:27:53 2018
> >>
> >> # rbd export --export-format 2 vms/vm-102-disk-2 - | rbd import - vdisks/vm-102-disk-2
> >> Exporting image: 100% complete...done.
> >> Importing image: 100% complete...done.
> >>
> >> # rbd snap ls vdisks/vm-102-disk-2
> >> (no output)
> >>
> >> # rbd export-diff --whole-object vms/vm-102-disk-2 - | rbd import-diff - vdisks/vm-102-disk-2
> >> Exporting image: 100% complete...done.
> >> Importing image diff: 100% complete...done.
> >>
> >> # rbd snap ls vdisks/vm-102-disk-2
> >> (still no output)
> >>
> >> It looks like the current content is copied but not the snapshots.
> >>
> >> What am I doing wrong? Any help is appreciated.
> >>
> >> Thanks,
> >>
> >>          Uwe
> >>
> >>
> >>
> >> Am 07.11.18 um 14:39 schrieb Uwe Sauter:
> >>> I'm still on luminous (12.2.8). I'll have a look on the commands. Thanks.
> >>>
> >>> Am 07.11.18 um 14:31 schrieb Jason Dillaman:
> >>>> With the Mimic release, you can use "rbd deep-copy" to transfer the
> >>>> images (and associated snapshots) to a new pool. Prior to that, you
> >>>> could use "rbd export-diff" / "rbd import-diff" to manually transfer
> >>>> an image and its associated snapshots.
> >>>> On Wed, Nov 7, 2018 at 7:11 AM Uwe Sauter <uwe.sauter.de at gmail.com> wrote:
> >>>>>
> >>>>> Hi,
> >>>>>
> >>>>> I have several VM images sitting in a Ceph pool which are snapshotted. Is there a way to move such images from one pool to another
> >>>>> and perserve the snapshots?
> >>>>>
> >>>>> Regards,
> >>>>>
> >>>>>           Uwe
> >>>>> _______________________________________________
> >>>>> ceph-users mailing list
> >>>>> ceph-users at lists.ceph.com
> >>>>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> >>>>
> >>>>
> >>>>
> >>>
> >
> >
> >



-- 
Jason


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