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#openstack-nova - 2020-09-23
11:44:25 brinzhang0 but in my env I used Python 3.6.9 (default, Jul 17 2020, 12:50:27)
11:45:03 kashyap sean-k-mooney: Right; on deprecation and reno (added in the TODO in the commit)
11:45:12 kashyap sean-k-mooney: Also, one more thing before I go AFK for a bit:
11:46:46 openstackgerrit Kashyap Chamarthy proposed openstack/nova master: [WIP] libvirt: Remove support for floppy drives https://review.opendev.org/753588
11:47:28 kashyap sean-k-mooney: It is about the versioned object bump when removing / deprecating supported values for hw_floppy_bus
11:47:37 kashyap (In nova/objects/image_meta.py)
11:47:48 kashyap I also mentioned it in the commit message above
11:48:56 sean-k-mooney you can also use a floppy disk dirve as a parmater for hw_disk_bus or hw_rescue_bus
11:49:19 sean-k-mooney we cant raise raise exception.EmulatedFloppyDriveIsDeprecated() in wallby
11:49:29 sean-k-mooney this removes support it does not depcate it
11:50:04 sean-k-mooney we have to supprot them for one more cycle before we stop generating vms that can use floppy disk drives
11:58:41 openstack Launchpad bug 1896617 in OpenStack Compute (nova) "Creation of image (or live snapshot) from the existing VM fails if libvirt-image-backend is configured to qcow2 starting from Ussuri" [Undecided,New]
11:58:41 gibi lyarwood: hi! if you have some spare time, could you look at https://bugs.launchpad.net/nova/+bug/1896617 ? the reporter refers to your change https://review.opendev.org/#/c/696834/ so I assume you have better context than me
12:07:33 brinzhang0 sean-k-mooney: I saw https://review.opendev.org/#/c/702453/, that I can run "pip install --user pre-commit", but cannot run pre-commit command, do you have some suggestion?
12:07:45 brinzhang0 # pre-commit install --allow-missing-config
12:07:46 brinzhang0 -bash: pre-commit: command not found
12:13:35 sean-k-mooney brinzhang0: it may not be in you path by defualt
12:14:19 sean-k-mooney when you do a user install it proably put it in ~/.local/bin
12:14:31 sean-k-mooney not all distos default to putting that in your path
12:14:31 brinzhang0 maybe yes, I try to use the docs of https://pre-commit.com/#pre-commit-configyaml---top-level to have a try
12:15:04 sean-k-mooney i manually adde it to my path in my bashrc
12:15:50 openstackgerrit Federico Ressi proposed openstack/nova master: Requires default python3-devel package on CentOS https://review.opendev.org/752073
12:16:25 openstackgerrit Federico Ressi proposed openstack/nova master: Requires default python3-devel package on CentOS https://review.opendev.org/752073
12:17:43 openstackgerrit Federico Ressi proposed openstack/nova master: Requires default python3-devel package on CentOS 8 https://review.opendev.org/752073
12:18:13 openstackgerrit Federico Ressi proposed openstack/nova master: Log stack trace when fails launching a defined domain https://review.opendev.org/750652
12:19:11 brinzhang0 sean-k-mooney: yeah, you are right, I can run it by "~/.local/bin/pre-commit run -v -a
12:19:12 brinzhang0 "
12:38:27 kashyap sean-k-mooney: Right, the exception is not the right thing, I did it for discussion, as I noted it in the commit message :)
12:51:40 openstackgerrit Merged openstack/nova master: test_evacuate.sh: Stop using libvirt-bin https://review.opendev.org/753267
13:09:52 lyarwood gibi: ack looking
13:21:53 lyarwood gibi: tbh that looks more like a canonical support bug than an actual bug in Nova
13:21:59 lyarwood gibi: the change isn't related
13:24:02 bauzas the Focal saga again ?
13:24:09 lyarwood nope
13:24:19 bauzas lyarwood: you should ask a second payslip from Canonical, y'know :p
13:25:33 gibi lyarwood: thanks lyarwood for checking it
13:26:56 lyarwood ah actually it might be a libvirt issue after all
13:27:06 openstack Launchpad bug 1885418 in OpenStack Compute (nova) "libvirt.libvirtError: unable to verify existence of block copy target: Permission denied" [Undecided,Incomplete]
13:27:06 lyarwood that bug points to https://bugs.launchpad.net/nova/+bug/1885418 that has a trace
13:27:13 lyarwood I had asked the reporter for more details a while ago but never got any
13:32:09 lyarwood argh why is the gate useless this week of all weeks
13:41:06 bauzas lyarwood: tbh /me remembers old times when we were two days before the RC1 cut and the gate was like 5 days off
13:41:14 bauzas just because of all the changes
13:41:24 bauzas now, this is too easy
14:39:18 openstack lyarwood: Error: Could not gather data from Launchpad for bug #1896617 (https://launchpad.net/bugs/1896617). The error has been logged
14:39:18 lyarwood gibi / bauzas ; https://bugs.launchpad.net/nova/+bug/1896617 updated, I can't reproduce it using devstack on Focal or F32. I've marked it as incomplete and asked for a reproducer against devstack before we look again.
14:40:13 gibi lyarwood: much appreciated!
14:40:13 openstack lyarwood: Error: Could not gather data from Launchpad for bug #1885418 (https://launchpad.net/bugs/1885418). The error has been logged
14:40:13 lyarwood https://bugs.launchpad.net/nova/+bug/1885418 also marked as a duplicate
14:43:10 artom Yeah, Launchpad seems to have 'sploded
14:44:04 artom Ah no, it's back
14:48:25 lyarwood fun so https://6f4d572707e259c12736-93a8141b9f45324a3b85293f1fcfbf55.ssl.cf1.rackcdn.com/753581/2/check/devstack-plugin-ceph-tempest-fedora-latest/8cc45c2/job-output.txt is ceph not py3 only yet?
14:48:28 artom Weird, I have debug=True in nova.conf, but oslo_messaging appears to be only logging at INFO
14:48:38 artom Is there a different conf option that I'm not setting?
14:49:14 lyarwood it's in oslo.log however
14:49:14 lyarwood there's a default level for specific libs but I thought DEBUG replaced that
14:50:05 lyarwood artom: https://github.com/openstack/oslo.log/blob/51324b276a8a5f69847d3a17fa89924dabad4759/oslo_log/_options.py#L19-L31
14:50:24 lyarwood artom: and https://github.com/openstack/oslo.log/blob/51324b276a8a5f69847d3a17fa89924dabad4759/oslo_log/_options.py#L175-L178
14:50:53 lyarwood that reminds me I wanted to set os-brick to DEBUG downstream
14:52:34 artom lyarwood, aha, thanks
15:48:20 openstackgerrit Lee Yarwood proposed openstack/nova master: zuul: Introduce nova-evacuate https://review.opendev.org/744883
16:06:36 lyarwood gibi++
22:15:01 openstackgerrit Merged openstack/nova master: libvirt: Bump MIN_{LIBVIRT,QEMU}_VERSION and NEXT_MIN_{LIBVIRT,QEMU}_VERSION https://review.opendev.org/746981
22:30:37 lyarwood \o/
22:58:12 lyarwood melwitt: https://review.opendev.org/#/c/747978/ - would you mind looking at this if you have time today
#openstack-nova - 2020-09-24
03:00:09 openstackgerrit Rui Zang proposed openstack/nova master: DO NOT REVIEW https://review.opendev.org/753919
04:34:55 openstackgerrit Hemanth Nakkina proposed openstack/nova master: Update pci stat pools based on PCI device changes https://review.opendev.org/749175
07:33:32 gibi I have to be offline for the next 2-3 hours but I will be back after lunch (UTC 11)
08:26:33 openstackgerrit Lucas Alvares Gomes proposed openstack/nova master: DO NOT REVIEW: Test OVN devstack module https://review.opendev.org/748226
09:14:40 openstackgerrit Lee Yarwood proposed openstack/nova master: zuul: Replace nova-live-migration with zuulv3 jobs https://review.opendev.org/752557
09:15:53 lyarwood stephenfin: https://review.opendev.org/#/c/744883 - would you mind hitting this back into the gate
09:16:03 stephenfin sure, looking
09:16:59 lyarwood had to be rebased to pickup the test-evacuate.sh change as the original live-migration job is still being used until https://review.opendev.org/752557 lands
09:17:15 stephenfin yup, makes sense
09:17:18 stephenfin +W
09:35:15 lyarwood bauzas: https://review.opendev.org/#/c/753281/ - Morning would you mind landing this in stable/ussuri please?
09:45:38 CeeMac lyarwood: morning :) I'm still trying to get my head around the process involved in the cinder retype initiated nova swap_volume. Is nova calling libvirt drive-mirror (or blockdev-mirror) to perform the sync, or is it relying on cinder copying/syncing the data to the new volume before doing an attachment swap? Trying to work out at which point the swap_volume job failure could be affecting the instance
09:46:11 CeeMac i've been reading through the driver.py and qemu block job docs
09:46:33 CeeMac but I lack a lot of context unfortunately
09:47:21 CeeMac i'm also trying to work out if any of the operations rely on / prefer the qemu quest agent and connection being present
10:06:54 lyarwood CeeMac: Morning sorry was afk
10:07:42 lyarwood CeeMac: so we call the https://libvirt.org/html/libvirt-libvirt-domain.html#virDomainBlockRebase API at the moment (if libvirt is < 6.0.0)
10:08:25 lyarwood CeeMac: AFAIK we don't use the guest agent at all during the process
10:09:40 openstack Launchpad bug 1896621 in OpenStack Compute (nova) "instance corrupted after volume retype" [High,Confirmed] - Assigned to Lee Yarwood (lyarwood)
10:09:40 lyarwood CeeMac: in terms of https://bugs.launchpad.net/nova/+bug/1896621 the issue is with parallel requests to retype multiple attachments to the same instance AFAICT
10:09:52 lyarwood CeeMac: virDomainBlockRebase is disk specific so that isn't an issue
10:10:11 lyarwood CeeMac: but the final thing we do when swapping disks is to update the persistent config for the overall domain
10:10:32 lyarwood CeeMac: AFAICT this fails when other calls to virDomainBlockRebase and thus QEMU block jobs are still active
10:12:03 lyarwood CeeMac: I was going to throw an instance wide lock on the compute _swap_volume call to avoid this as I can reproduce the failure with libvirt > 6.0.0 where we now use the https://libvirt.org/html/libvirt-libvirt-domain.html#virDomainBlockCopy libvirt API
10:19:54 lyarwood CeeMac: I'll try to find some time this afternoon to post a WIP
10:21:17 lyarwood CeeMac: I'll also try to work out if we can recover from this in your env, I've got a feeling it might be possible if we can work out the details of the new volume and attach it somehow to the instance
10:47:42 brinzhang_ stephenfin: thanks, yes, I missed sth, updated, and replied in the patch :D
10:58:19 CeeMac lyarwood: sorry, was just in a long meeting. thanks for the notes, I'll do some more reading! :)
10:59:48 CeeMac lyarwood: so, i wonder if it is the domain persistent config update. Or if it is just a direct result of the multiple block jobs, I need to stand up a disposable environment to validate if this affects all instances or specific ones
11:01:21 CeeMac lyarwood: for reference, i seem to have the most issue with Microsoft Active Directory Controllers. They really don't seem to like a lot of the normal operations. removing/recreating the instance from the same boot volume causes the same level of corruption. As does deleting the instance and recreating it from a nova snapshot.
11:02:31 CeeMac lyarwood: I had to delete the affected instance in the production environment, but I think I still have a corrupt instance in my dev area I could hold off on killing and rebuilding
11:15:14 CeeMac lyarwood: so if I'm understanding the docs correctly, you're using VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT with VIR_DOMAIN_BLOCK_REBASE_COPY_DEV to point the rebase job at a volume device that has already been created and syning the content across to it?
11:22:19 lyarwood CeeMac: yes, I believe some cinder-volume backends clone things in the background so we don't end up copying everything across
11:22:34 lyarwood CeeMac: just the delta but backends like the LVM/iSCSI backend don't do this
11:23:03 lyarwood CeeMac: we then switch the volumes around within Cinder

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