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[ops] [glance] Need to move images to a different backend


Hi Massimo,

Glance multiple store is still experimental and it does not have support
for location API in rocky and stein, we are making it compatible in Train
release.

There is still one bug open for location compatibility with multiple stores
and patch for it is not merged yet, I will also encourage you to deploy
latest master and apply this patch in your environment and test it.
https://review.opendev.org/#/c/617229/19

NOTE:
I have tested this on current master after applying patch to local
environment and the scenario you mentioned is working fine.

Thanks & Best Regards,

Abhishek Kekane


On Tue, Aug 27, 2019 at 7:47 PM Abhishek Kekane <akekane at redhat.com> wrote:

> Hi Massimo,
> Cool, thank you for confirmation, I will try to reproduce this in my
> environment. It will take some time, will revert back to you once done.
> Meanwhile could you please try the same with single store (disabling the
> multiple stores)?
>
> Thank you,
>
> Abhishek
>
> On Tue, 27 Aug 2019 at 6:33 PM, Massimo Sgaravatto <
> massimo.sgaravatto at gmail.com> wrote:
>
>> Hi Abhishek
>>
>> Yes, before  trying the:
>>
>> glance location-add --url
>> rbd://8162f291-00b6-4b40-a8b4-1981a8c09b64/images-prod/6bcc4eab-ed35-42dc-88bd-1d45de73b628/snap
>> 6bcc4eab-ed35-42dc-88bd-1d45de73b628
>>
>> command, I uploaded the image to ceph. And indeed I can see it:
>>
>>
>>
>> [root at ceph-mon-01 ~]# rbd info
>> images-prod/6bcc4eab-ed35-42dc-88bd-1d45de73b628
>> rbd image '6bcc4eab-ed35-42dc-88bd-1d45de73b628':
>> size 10GiB in 1280 objects
>> order 23 (8MiB objects)
>> block_name_prefix: rbd_data.b7b56aa1e4f0bc
>> format: 2
>> features: layering
>> flags:
>> create_timestamp: Tue Aug 27 11:42:32 2019
>>
>> [root at ceph-mon-01 ~]# rbd snap ls
>> images-prod/6bcc4eab-ed35-42dc-88bd-1d45de73b628
>> SNAPID NAME  SIZE TIMESTAMP
>> 455500 snap 10GiB Tue Aug 27 11:46:37 2019
>> [root at ceph-mon-01 ~]#
>>
>>
>> Cheers, Massimo
>>
>> On Tue, Aug 27, 2019 at 2:41 PM Abhishek Kekane <akekane at redhat.com>
>> wrote:
>>
>>> Hi Massimo,
>>>
>>> I need to reproduce this first, but pretty much sure this issue is not
>>> because you configured multiple backends. What you are doing is downloading
>>> existing image to your local storage and then uploading it to glance using
>>> add-location operation.
>>>
>>> So before adding this using add-location operation have you manually
>>> uploaded this image to ceph/rbd? if not then how you are building your
>>> location url which you are mentioning in the add-location command? If this
>>> location is not existing then it might be a problem.
>>>
>>> Thank you,
>>>
>>> Abhishek
>>>
>>> On Tue, 27 Aug 2019 at 5:09 PM, Massimo Sgaravatto <
>>> massimo.sgaravatto at gmail.com> wrote:
>>>
>>>> I have a Rocky installation where glance is configured with multiple
>>>> backends. This [*] is the relevant part of the glance configuration.
>>>>
>>>> I now need to dismiss the file backend and move the images-snapshots
>>>> stored there to rbd.
>>>>
>>>>
>>>> I had in mind to follow this procedure (already successfully tested
>>>> with an older version of OpenStack):
>>>>
>>>> 1) download the image from the file backend (glance image-download
>>>> --file <file> <imageid>
>>>> 2) upload the file <file> to rbd, relying on this function:
>>>> https://github.com/openstack/glance_store/blob/stable/rocky/glance_store/_drivers/rbd.py#L445
>>>> 3) glance location-add --url rbd://xyz <imageid>
>>>> 4) glance location-delete --url file://abc <imageid>
>>>>
>>>> I have problems with 3:
>>>>
>>>> # glance --debug location-add --url
>>>> rbd://8162f291-00b6-4b40-a8b4-1981a8c09b64/images-prod/6bcc4eab-ed35-42dc-88bd-1d45de73b628/snap
>>>> 6bcc4eab-ed35-42dc-88bd-1d45de73b628
>>>> ...
>>>> ...
>>>> DEBUG:keystoneauth.session:PATCH call to image for
>>>> https://cloud-areapd.pd.infn.it:9292/v2/images/6bcc4eab-ed35-42dc-88bd-1d45de73b628
>>>> used request id req-6c0598cc-582c-4ce7-a14c-5d1bb6ec4f14
>>>> Request returned failure status 400.
>>>> DEBUG:glanceclient.common.http:Request returned failure status 400.
>>>> Traceback (most recent call last):
>>>>   File "/usr/lib/python2.7/site-packages/glanceclient/shell.py", line
>>>> 687, in main
>>>>     OpenStackImagesShell().main(argv)
>>>>   File "/usr/lib/python2.7/site-packages/glanceclient/shell.py", line
>>>> 591, in main
>>>>     args.func(client, args)
>>>>   File "/usr/lib/python2.7/site-packages/glanceclient/v2/shell.py",
>>>> line 749, in do_location_add
>>>>     image = gc.images.add_location(args.id, args.url, metadata)
>>>>   File "/usr/lib/python2.7/site-packages/glanceclient/v2/images.py",
>>>> line 448, in add_location
>>>>     response = self._send_image_update_request(image_id, add_patch)
>>>>   File "/usr/lib/python2.7/site-packages/glanceclient/common/utils.py",
>>>> line 598, in inner
>>>>     return RequestIdProxy(wrapped(*args, **kwargs))
>>>>   File "/usr/lib/python2.7/site-packages/glanceclient/v2/images.py",
>>>> line 432, in _send_image_update_request
>>>>     data=json.dumps(patch_body))
>>>>   File "/usr/lib/python2.7/site-packages/keystoneauth1/adapter.py",
>>>> line 340, in patch
>>>>     return self.request(url, 'PATCH', **kwargs)
>>>>   File "/usr/lib/python2.7/site-packages/glanceclient/common/http.py",
>>>> line 377, in request
>>>>     return self._handle_response(resp)
>>>>   File "/usr/lib/python2.7/site-packages/glanceclient/common/http.py",
>>>> line 126, in _handle_response
>>>>     raise exc.from_response(resp, resp.content)
>>>> HTTPBadRequest: 400 Bad Request: Invalid location (HTTP 400)
>>>> 400 Bad Request: Invalid location (HTTP 400)
>>>>
>>>>
>>>> As far as I can see with the "openstack" client there is not something
>>>> to add/delete a location.
>>>> So I guess it is necessary to change the 'direct_url' and 'locations'
>>>> properties.
>>>>
>>>> If I try to change the direct_url property:
>>>>
>>>> # openstack image set --property
>>>> direct_url='rbd://8162f291-00b6-4b40-a8b4-1981a8c09b64/images-prod/6bcc4eab-ed35-42dc-88bd-1d45de73b628/snap'
>>>> 6bcc4eab-ed35-42dc-88bd-1d45de73b628
>>>> 403 Forbidden: Attribute 'direct_url' is read-only. (HTTP 403)
>>>>
>>>> Any hints ?
>>>> Thanks, Massimo
>>>>
>>>> [*]
>>>>
>>>> [default]
>>>> ...
>>>> enabled_backends = file:file,http:http,rbd:rbd
>>>> show_image_direct_url = true
>>>> show_multiple_locations = true
>>>>
>>>> [glance_store]
>>>> default_backend = rbd
>>>>
>>>> [file]
>>>> filesystem_store_datadir = /var/lib/glance/images/
>>>>
>>>>
>>>> [rbd]
>>>> rbd_store_chunk_size = 8
>>>> rbd_store_ceph_conf = /etc/ceph/ceph.conf
>>>> rbd_store_user = glance-prod
>>>> rbd_store_pool = images-prod
>>>>
>>>> --
>>> Thanks & Best Regards,
>>>
>>> Abhishek Kekane
>>>
>> --
> Thanks & Best Regards,
>
> Abhishek Kekane
>
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