Monday, 2019-11-11

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openstackgerritTakashi Kajinami proposed openstack/cinder master: NFS (chunked) backup: split reads  https://review.opendev.org/61107904:51
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openstackgerritTakashi Kajinami proposed openstack/cinder master: NFS (chunked) backup: split reads  https://review.opendev.org/61107907:08
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openstackgerritRaghavendra Tilay proposed openstack/cinder master: iSCSI driver initialization should fail for Primera backend  https://review.opendev.org/69236010:09
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CobHeadHi everyone! I had a question: When I rename an existing volume type, Cinder creates new entries in volume services, and sets the ones with the old volume type name to "Down". Why is that? Why can't I keep the old one aswell?12:07
CobHeadThere are several volumes with the old volume type, and those can't be deleted via conventional means when the old volume type is set to "Down"12:08
CobHeadNor can they be snapshotted or resized.12:08
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CobHeadI thought of creating a new volume type and set the old one to private, to let users use the new one, but when the old one is set to private, users can't create snapshots or resize their volumes, but they can delete them.12:09
CobHeadIn order to get all volumes over on the new type, I would need to retype all of them, which is not desirable at all. Volumes need to be detached in order to be retyped.12:10
CobHeadI would love to know if there was a way to let Cinder know to keep the old volume type online, so users can still delete/resize/snapshot their volume(s)12:11
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CobHeadI am on Rocky, btw :)12:13
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raghavendratif anyone is available for review, then please have a look at https://review.opendev.org/#/c/692360/  ... thanks.12:46
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whoami-rajatand it goes chinese again https://etherpad.openstack.org/p/shanghai-ptg-cinder13:36
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smcginnisCobHead: It sounds like you are mixing terms between volume types and volume backends. Backends are what have services that are Up or Down. You can create as many volume types as you would like.14:11
smcginniswhoami-rajat: Fixed it.14:13
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smcginnisCobHead: This may be what you want if you are trying to have multiple volume types - https://specs.openstack.org/openstack/cinder-specs/specs/rocky/support-filter-backend-on-operation-type.html14:16
toskysmcginnis: uhm, I still see in chinese - caching maybe?14:17
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smcginnisHuh, I see it in Chinese again too.14:25
smcginnisLet me try again.14:26
smcginnisLost all formatting. :/14:26
CobHeadsmcginnis: Apologizes. Let me elaborate: If I try to change the name of the volume type (i.e. from hdd-gold to hdd-platinum), Cinder creates a new entry under volume services (which can be viewed by querying the API - "openstack volume service list". The issue here is that the old name is still the name of the volume type for all volumes that was created prior to this change, and when you ask Cinder for the list of volume services, the old14:33
CobHeadvolume type is explicitly listed as "Down", which is reflected by the fact that you can't delete, resize or make snapshots of volumes whatsoever.14:33
smcginnisCobHead: Changing volume types does not affect services. This is where I think you are mixing terms.14:34
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smcginnisA volume type is just an entry with extra spec info that allows the scheduler to make some decisions on volume placement.14:34
smcginnisA volume backend is defined in cinder.conf and has a corresponding service.14:34
CobHeadhttp://paste.openstack.org/show/Zq8MgjHcIkoA2u2I3MzD/14:39
CobHeadsmcginnis, that is the output I currently have. Prior to the name change of the volume type, the name was rbd-test-rename. I tried to see what would happen when I renamed it to something else, e.g. rbd-hacks14:40
smcginnisIt is not a volume type. Please don't mix the terms as that is just going to confuse things.14:40
smcginnisIt is not recommended to change volume backend names. It will take some manual cleanup to fix up the services and it should only ever be done if you don't have any volumes on the backend.14:41
CobHeadExcept I didn't change the backend name. Here is how I did it in the dashboard e.g: Login as admin, go to Admin -> Volume Types, click on "Edit" and change the name. If you view "Extra specs" the volume backend name is in there. And as far as I can see in the cinder configuration, the backend name is exactly the same as it was before.14:42
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smcginnisCobHead: So you just edited the extra specs of a volume type and that changed the cinder backend services? That doesn't make sense. Something is missing here.14:45
CobHeadI did not edit the extra specs. Extra specs is a unique option in the Dashboard. I just clicked "edit" and changed the name of the volume type. Same can be done via CLI by doing "openstack volume type set <id> --name <new-name>"14:47
smcginnisRight. And that's what's odd. Modifying a volume type is completely separate than a volume backend, so it should not have had any impact on the services.14:47
CobHeadAnd yes, something is probably missing.14:47
CobHeadIndeed14:48
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openstackgerritGorka Eguileor proposed openstack/os-brick master: Fix FC scan too broad  https://review.opendev.org/69064014:54
openstackgerritGorka Eguileor proposed openstack/os-brick master: Update FC connection_properties examples  https://review.opendev.org/69064114:54
openstackgerritGorka Eguileor proposed openstack/os-brick master: FC improve logging  https://review.opendev.org/69064214:54
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CobHeadBah, been so intent on figuring out what is wrong that I forgot to mention that OpenStack Ansible is heavily involved here, and of course, if the volume type is not present in the OSA config, OSA will set the volume backend to down. (I ran OSA after changing the volume type name, with the new volume type name) Need to query the OSA people whether or not it is possible to just change the name, and not both the name and the backend name.14:58
CobHeadOtherwise I will have to change the role.14:58
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CobHeadsmcginnis, I apologize, and I thank you for taking the time to read and respond :)15:02
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smcginnisCobHead: No problem. I hope OSA isn't setting a backend to down if it doesn't have a matching volume type. They really are not supposed to be that tied together. You can have volume types without a volume_backend_name set in the extra specs and that's perfectly valid. If it sounds like they are artificially tying them together, might be good to mention that that is not correct.15:04
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smcginnisrosmaita: Reminder that we still need to wrap up and do the final Train release for cinderlib at some point.15:22
rosmaitaack15:23
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whoami-rajatsmcginnis, great, thanks. the timeslider option?15:54
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openstackgerritSimon Dodsley proposed openstack/cinder master: Pure Storage - bump version numbers for Ussuri  https://review.opendev.org/69372015:55
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openstackgerritMerged openstack/os-brick stable/train: Remove VxFlexOS connector external dependencies  https://review.opendev.org/69193119:43
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