Thursday, 2018-09-20

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openstackgerritNguyen Hai proposed openstack/glance-specs master: import zuul job settings from project-config  https://review.openstack.org/59350201:11
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openstackgerritLiang Fang proposed openstack/python-glanceclient master: Specify image size to avoid glance backend resize  https://review.openstack.org/60257701:35
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AJaegernguyenhai: seems jokke_ is on FTO, so we have to wait with 593502 until he's back - he's the only one that can approve06:36
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rosmaita Courtesy meeting reminder on #openstack-meeting-4: flwang1, jokke_, mclaren, mfedosin, nikhil_k, rosmaita, GB21, bpoulos, harshs, abhishekk, dshakhray, kairat, alex_bash, smcginnis, arcolife, Brin, Roamer`, andybotting13:58
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rosmaitaimacdonn: check the glance meeting log for today15:02
rosmaitahttp://eavesdrop.openstack.org/meetings/glance/2018/glance.2018-09-20-14.00.log.html15:02
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openstackgerritMerged openstack/glance master: Rename async package to async_  https://review.openstack.org/58261315:18
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rosmaitaimacdonn: here's a start for you, feel free to use it in a patch to master: https://etherpad.openstack.org/p/glance-imacdonn-relnote15:27
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rosmaitajokke_: ^^15:28
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LiangFangCould anybody help to review:https://review.openstack.org/#/c/602580/ and https://review.openstack.org/#/c/602577/?16:02
LiangFangthis is to specify image size to avoid glance backend resize when uploading volume to glance16:03
LiangFangthese 2 patches cowork with a patch of cinder to finish this thing16:04
LiangFangthings is that: if we don't specify the image size, the glace backend(e.g. ceph) don't know the size at the initial phase. So it need to resize the image (inside ceph or any backend storage system) when it received every chunk of data16:08
imacdonnLiangFang: Is there a spec for this >16:08
LiangFangthis is a known issue, and a bug related with it16:10
LiangFangin glance_store, the drivers(e.g. rbd.py) of every backend are marking this as a known issue16:12
LiangFangComments in the code like:# If the image size provided is zero we need to do16:14
LiangFang# a resize for the amount we are writing. This will16:14
LiangFang# be slower so setting a higher chunk size may16:14
LiangFang# speed things up a bit.16:14
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imacdonnLiangFang: I don't disagree with the desire, but I think any API change should require a spec16:18
imacdonn(probably a spec-lite would do for this, but I'm not sure)16:19
imacdonnThere seems to have been a move away from using HTTP headers to convey things like that .... the spec review would decide things like that16:20
LiangFangthanks for your comment16:24
imacdonnIt is mentioned at https://docs.openstack.org/glance/14.0.0/glanceapi.html16:26
LiangFangIn fact this issue had been blocked years, and it seems no other better way to convey the info "image size"16:26
imacdonnI think the new way is in the POST data, rather than in the headers16:32
imacdonnlike ... curl -g -i -X POST -H 'Accept-Encoding: gzip, deflate' -H 'Accept: */*' -H 'User-Agent: python-glanceclient' -H 'Connection: keep-alive' -H 'X-Auth-Token: xxx' -H 'Content-Type: application/json' -d '{"min_disk": 123, "container_format": "bare", "disk_format": "raw", "name": "foo"}' http://glance_host:9292/v2/images16:33
imacdonnI think it should be conveyed the same way as "min_disk"16:34
LiangFangso there will be a seperate request?16:35
imacdonnsee what the core team says, but IMO it should have a spec[-lite], where the approach would be defined and approved, then you can implement against it16:35
imacdonnI'm working one though the process myself at the moment16:36
imacdonnsmcginnis: let me know if you disagree16:36
LiangFangOK, that's fine16:37
smcginnisimacdonn: You're probably right, but I would like input from the other cores that have more history.16:41
imacdonnack16:41
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