| Posted | Nick | Remark | |
|---|---|---|---|
| #openstack-nova - 2025-05-27 | |||
| 16:40:33 | sean-k-mooney | /me clicks | |
| 16:40:47 | gibi | sean-k-mooney: this is the memballon RFE | |
| 16:40:47 | sean-k-mooney | oh that | |
| 16:41:07 | sean-k-mooney | ya i kind of felt like may i shoudl jsut spend an afternoon and write it | |
| 16:41:15 | sean-k-mooney | basicaly the short version is | |
| 16:41:33 | sean-k-mooney | nova orgianlly did not enabel the mem balloan at all unless you enabel memory stat reporting | |
| 16:41:45 | sean-k-mooney | at some point libvirt started adding it by default | |
| 16:41:59 | sean-k-mooney | but we have never actullly used it to release/reclaim unused memory form the guest | |
| 16:42:07 | sean-k-mooney | because that used to require a special agent on the host | |
| 16:42:17 | sean-k-mooney | proxmox and ovirt provided those | |
| 16:42:23 | sean-k-mooney | that now built into libvirt | |
| 16:42:36 | sean-k-mooney | so we coudl just hardcode 2 xml atributes | |
| 16:42:49 | sean-k-mooney | which woudl allwo memory to be release in 2 cases | |
| 16:43:14 | sean-k-mooney | oen when the OOM reaper is about to kill the vm if we have auto defalte on the vm gets a chane to free memory | |
| 16:43:24 | sean-k-mooney | the other one "freePageReporting" | |
| 16:43:40 | sean-k-mooney | allow the memory to be retruend to the host any time the guest free memory | |
| 16:43:52 | sean-k-mooney | i think it would nice ot supprot both in nova | |
| 16:44:08 | sean-k-mooney | but ya someone just needt to write it | |
| 16:44:32 | sean-k-mooney | i kind of wodnered how other felt | |
| 16:44:40 | gibi | if you have time to write it I'm not against it, but it is just a nice to have | |
| 16:45:09 | sean-k-mooney | track this as a wishlist RFE bug? | |
| 16:45:12 | sean-k-mooney | spec? | |
| 16:45:38 | sean-k-mooney | i feel like this is one of those things where is quicker to write then disucss :) | |
| 16:46:19 | Uggla | Yep that sounds quite strait forward so specless BP, I think. | |
| 16:46:23 | gibi | if this is hardcode as enalbed then specless | |
| 16:46:25 | sean-k-mooney | all of our qemu and linvert version miniums are above wehre this was added so there is no migration or upgrade aspect either | |
| 16:46:48 | gibi | does it effect realtime / nfv guest performance? | |
| 16:46:54 | sean-k-mooney | :) | |
| 16:47:13 | sean-k-mooney | well yes but they normlaly turn off the mem ballon entirly | |
| 16:47:22 | sean-k-mooney | because it addds overhead that they dont tolllerate | |
| 16:47:38 | sean-k-mooney | whicih is why we shoudl fix the bug that stops you form being able to do that | |
| 16:47:43 | gibi | ahh | |
| 16:47:50 | sean-k-mooney | https://bugs.launchpad.net/nova/+bug/2069192 | |
| 16:47:57 | gibi | so we should not make that situation worse :) Lets fix the bug first then | |
| 16:48:13 | sean-k-mooney | so this would be hard code on if you have the mem balloan enabled | |
| 16:48:37 | sean-k-mooney | gibi: rajesh ahs a patch up to fix that bug https://review.opendev.org/c/openstack/nova/+/945621 | |
| 16:48:44 | gibi | cool | |
| 16:49:06 | gibi | so I'm OK with a specless | |
| 16:49:14 | gibi | and I will look at that bugfix | |
| 16:49:30 | sean-k-mooney | Uggla: gibi ok lets do this. if i find time to work on this before m2 ill file a specless blueprint and we can aprove it then | |
| 16:49:51 | sean-k-mooney | if not i can file a RFE bug or similar tracker and if someone has time we can work on it later | |
| 16:50:01 | gibi | sounds good to me | |
| 16:50:53 | Uggla | +1 | |
| 16:51:20 | Uggla | I have tracked that in the etherpad no to forget. | |
| 16:52:30 | Uggla | Something else to discuss ? | |
| 16:52:48 | gibi | - | |
| 16:53:11 | Uggla | Do you have still energy left to triage 1 or 2 bugs ? | |
| 16:53:26 | gibi | - | |
| 16:53:49 | sean-k-mooney | we can proably do one | |
| 16:54:17 | sean-k-mooney | although if you have not noticed im a littel disrtrated today. but we can try to do one | |
| 16:54:51 | Uggla | #topic Bug scrubbing | |
| 16:54:56 | Uggla | #link: https://etherpad.opendev.org/p/nova-bug-selection-for-triaging#L4 | |
| 16:55:02 | Uggla | Just one | |
| 16:55:17 | Uggla | https://bugs.launchpad.net/nova/+bug/2103500 | |
| 16:56:21 | Uggla | To my mind that sounds a valid one. At least regarding the comment from Brian. | |
| 16:58:29 | gibi | db error in the neutron code, this is a neutron bug | |
| 16:58:49 | gibi | at least neutron should not return 500 | |
| 16:59:14 | sean-k-mooney | so we had a vm create request with --network | |
| 16:59:28 | sean-k-mooney | it existsed at the api but by the time we got to the compute it as deleteed | |
| 16:59:48 | sean-k-mooney | i guesss it coudl happen when we do the quota check as well | |
| 17:00:01 | gmaan | and nova do capture NetworkNotFound exception if it is not found and requested https://github.com/openstack/nova/blob/221a3e89e8988bc664298106ee691a4e41ca71f9/nova/api/openstack/compute/servers.py#L842 | |
| 17:00:02 | sean-k-mooney | in anycase ya we shoudl get back a 400 not a 500 | |
| 17:00:43 | gmaan | or somewhere neutron exception is lost and not raised to controller ? | |
| 17:00:47 | sean-k-mooney | the expected behivor here shold be that nova puts the vm in error | |
| 17:01:03 | sean-k-mooney | and when the vm is deleted we would clean up any prot that were created then | |
| 17:01:09 | sean-k-mooney | based on teh delete on termeinate behaivor | |
| 17:01:20 | gmaan | yeah, bug say ignore the deleted network port and continue VM creation which does not seems right | |
| 17:01:42 | sean-k-mooney | its not form a nova point of view because we could not honner the orginal request | |
| 17:02:33 | sean-k-mooney | so depending on where this failed it soudl be burried in cell 0, rejected at the quoata check with a 400 or in error in the cell db if it got all the way to the compute | |
| 17:04:05 | sean-k-mooney | reading it more careflyy im tempeted to mark it inviald in nova | |
| 17:04:35 | sean-k-mooney | in there case its the quota check that is failing whne we list all prots for a tenatnt | |
| 17:05:05 | Uggla | sean-k-mooney, if you are unsure we can keep it open for next week. | |
| 17:05:26 | sean-k-mooney | althogh if we are missing the try accpate on teh network not found then thats a valid bug i guess | |
| 17:07:18 | Uggla | sale for valid ? | |
| 17:07:55 | gmaan | I have not tracked the exact call of validate_networks() but nova handle NetworkNotFound in _validate_requested_network_ids | |
| 17:07:55 | gmaan | https://github.com/openstack/nova/blob/221a3e89e8988bc664298106ee691a4e41ca71f9/nova/network/neutron.py#L988 | |
| 17:09:06 | gmaan | does bug mention 500 is returned? or 400 ? | |
| 17:09:14 | sean-k-mooney | gmaan: i think neturon is returnign a 500 | |
| 17:09:17 | sean-k-mooney | https://paste.openstack.org/show/bt3BWnyrBbQspiFx8KPZ/ | |
| 17:09:39 | gmaan | ohk | |
| 17:09:51 | sean-k-mooney | i think we need more info to be sure | |
| 17:10:13 | sean-k-mooney | the do have a NetworkNotFound excption https://paste.openstack.org/show/bJL9b5aY99XpZlLZdzgy/ | |
| 17:10:15 | gmaan | I think nova hanlding the error correctly if neuton return NetworkNotFound | |
| 17:10:35 | gmaan | and controller also handle NetworkNotFound so 400 will be return | |
| 17:11:21 | sean-k-mooney | can you comment to that effect on the bug | |
| 17:11:47 | gmaan | sure, will do after TC meeting | |
| 17:11:58 | sean-k-mooney | the first step to fixing this if we were to fix it in nova woudl be a repoducer test anyway | |
| 17:12:03 | sean-k-mooney | iesally a functional one | |
| 17:13:45 | Uggla | sean-k-mooney, does that mean we can set it as valid ? | |
| 17:15:43 | Uggla | I need to close the meeting, so I propose to look at that bug offline later or next week. | |
| 17:15:47 | Uggla | Thanks all and thanks for the extended time for bug triage. | |
| 17:15:54 | gmaan | Uggla: I will check exact trace of validate_network and see if nova missing NetworkNotFound handling anywhere | |
| 17:15:54 | Uggla | #endmeeting | |
| 17:15:54 | opendevmeet | Meeting ended Tue May 27 17:15:54 2025 UTC. Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4) | |
| 17:15:54 | opendevmeet | Minutes: https://meetings.opendev.org/meetings/nova/2025/nova.2025-05-27-16.00.html | |
| 17:15:54 | opendevmeet | Minutes (text): https://meetings.opendev.org/meetings/nova/2025/nova.2025-05-27-16.00.txt | |
| 17:15:54 | opendevmeet | Log: https://meetings.opendev.org/meetings/nova/2025/nova.2025-05-27-16.00.log.html | |
| 17:15:57 | gmaan | and comment in bug | |
| 17:16:02 | gmaan | aftr TC meeting | |
| 17:16:37 | Uggla | thanks gmaan | |