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

Uwe Sauter uwe.sauter.de at gmail.com
Wed Nov 7 12:02:08 PST 2018


I do have an empty disk in that server. Just go the extra step, save the export to a file and import that one?



Am 07.11.18 um 20:55 schrieb Jason Dillaman:
> 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
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>
>>>
>>>
> 
> 
> 


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