Friday, 2018-08-03

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openstackgerritmelanie witt proposed openstack/nova stable/ocata: [stable only] Handle quota usage during create/delete races  https://review.openstack.org/58241300:58
openstackgerritmelanie witt proposed openstack/nova stable/ocata: Add functional regression test for bug 1783613  https://review.openstack.org/58841600:58
openstackbug 1783613 in OpenStack Compute (nova) ocata "[ocata only] quota usage not decremented during boot/delete race" [Undecided,In progress] https://launchpad.net/bugs/1783613 - Assigned to melanie witt (melwitt)00:58
openstackgerritMerged openstack/nova master: In Python3.7 async is a keyword [1]  https://review.openstack.org/58436500:58
openstackgerritmelanie witt proposed openstack/nova stable/ocata: [stable only] Add functional regression test for bug 1783613  https://review.openstack.org/58841600:59
openstackgerritmelanie witt proposed openstack/nova stable/ocata: [stable only] Handle quota usage during create/delete races  https://review.openstack.org/58241300:59
openstackbug 1783613 in OpenStack Compute (nova) ocata "[ocata only] quota usage not decremented during boot/delete race" [Undecided,In progress] https://launchpad.net/bugs/1783613 - Assigned to melanie witt (melwitt)00:59
openstackgerritGhanshyam Mann proposed openstack/nova master: Remove unused request API sample template  https://review.openstack.org/58842001:30
openstackgerritGhanshyam Mann proposed openstack/nova master: Remove unused request API sample template  https://review.openstack.org/58842001:31
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openstackgerritGhanshyam Mann proposed openstack/nova master: Remove unused request API sample template  https://review.openstack.org/58842001:34
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openstackgerritZhenyu Zheng proposed openstack/nova master: Update installation guide to be more clear about cellsv2  https://review.openstack.org/58424401:51
openstackgerritzhufl proposed openstack/nova master: Fix none-ascii char in doc  https://review.openstack.org/58842201:56
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openstackgerritVishakha Agarwal proposed openstack/nova master: No change in  field 'updated' in server  https://review.openstack.org/58644603:03
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openstackgerritmelanie witt proposed openstack/nova stable/ocata: [stable only] Handle quota usage during create/delete races  https://review.openstack.org/58241304:38
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openstackgerritVishakha Agarwal proposed openstack/nova master: 'Updated_at' is NULL when show aggregate info  https://review.openstack.org/58027105:57
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openstackgerritGhanshyam Mann proposed openstack/nova master: Remove unused request API sample template  https://review.openstack.org/58842006:06
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alex_xustephenfin: those sample file are delete by this commit https://review.openstack.org/#/c/149129/06:44
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openstackgerritGhanshyam Mann proposed openstack/nova master: Remove unused request API sample template  https://review.openstack.org/58842007:00
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openstackgerritYongli He proposed openstack/nova master: Load expected attr pci_devices while migrate  https://review.openstack.org/58845507:23
openstackgerritMerged openstack/nova master: Add another up-call to the cells v2 caveats list  https://review.openstack.org/58191007:31
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openstackgerritYikun Jiang (Kero) proposed openstack/nova master: Fix nits in resource_provider.py  https://review.openstack.org/58847008:28
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openstackgerritzhufl proposed openstack/nova master: xx_instance_type_id in list_migrations should be integer  https://review.openstack.org/58848109:12
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openstackgerritYikun Jiang (Kero) proposed openstack/nova master: Fix nits in resource_provider.py  https://review.openstack.org/58847009:55
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openstackgerritChen proposed openstack/nova master: Revert task_state to none for LM failure due to invalid dest  https://review.openstack.org/58851211:01
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openstackgerritMerged openstack/nova master: Remove unused request API sample template  https://review.openstack.org/58842011:29
cdentjaypipes: I'm eagerly anticipating your blog post, how much longer will I have to wait?12:02
openstackgerritLiam Young proposed openstack/nova master: Target metadata requests at the correct cell.  https://review.openstack.org/58852012:06
openstackgerritMerged openstack/nova master: Docs: Add Placement to Nova system architecture  https://review.openstack.org/58433812:13
openstackgerritLiam Young proposed openstack/nova master: Remove Neutron MetaAPIProxy from cellsv2-layout  https://review.openstack.org/58852512:20
openstackgerritSurya Seetharaman proposed openstack/nova master: Cleanup comp_node, res_prov, services, aggregate_hosts during cell deletion  https://review.openstack.org/54666012:30
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fried_riceGuten morgen cdent, wie geht's?12:49
cdenttired. vaguely stupid. writing a pupdate.12:50
cdentyou?12:50
fried_riceFeeling similar, not quite enough sleep last night. Meant to sleep in, but failed.12:51
fried_riceAnything I should attend to for you today?12:52
fried_riceHaven't gotten through email yet, but I was also curious whether you feel the/a use case for placement debug info has been described if not fully, then at least adequately to justify some action.12:54
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cdenta) nothing in particular I need, I'd say reshaper is the main digs13:00
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fried_riceI updated the reshaper series last night13:02
fried_ricedidn't address nits on +X'd patches, just on -1'd13:02
fried_ricefigured the rest for a cumulative fup patch13:02
cdentb) alex raised a good point on the placement debug thing (in response to your patch), which is the disjunction between host and resource provider when "counting things" in placement results. I think to get closer to good action, we need to think that through a bit more. I also don't think we should do anything more, code wise, beyond what you've already done, with placement debugging until after we've wiped other stuff that nova isn't doing yet off13:03
cdentslate13:03
fried_ricenoted13:05
openstackgerritMerged openstack/nova master: Scrub hw:cpu_model from API samples  https://review.openstack.org/58837113:19
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fried_ricecdent: You have/had (a) patch(es) somewhere to ensure traits and resource class cache only on startup, right?13:38
fried_ricecdent: Which I guess haven't merged yet, because I'm still seeing that happen multiple times in a request.13:38
cdentfried_rice: yeah, they were above my os-resource-class changes, because with a sync was added13:39
cdenthttps://review.openstack.org/#/c/584086/13:39
cdentit's probably movable13:39
fried_riceno biggie, just wanted to make sure I wasn't seeing this behavior *after* those merged.13:40
cdentdepending on how the near future goes I might pull that one out to it's own thing13:40
openstackgerritChris Dent proposed openstack/nova stable/queens: [placement] Retry allocation writes server side  https://review.openstack.org/58856913:41
openstackgerritEric Fried proposed openstack/nova master: [placement] Debug log per granular request group  https://review.openstack.org/58835013:41
openstackgerritStephen Finucane proposed openstack/nova stable/queens: Don't filter out sibling sets with one core  https://review.openstack.org/58857013:42
openstackgerritStephen Finucane proposed openstack/nova stable/queens: Ensure emulator threads are always calculated  https://review.openstack.org/58857113:42
openstackgerritStephen Finucane proposed openstack/nova stable/queens: Always pass 'NUMACell.siblings' to _pack_instance_onto_cores'  https://review.openstack.org/58857213:42
openstackgerritStephen Finucane proposed openstack/nova stable/queens: trivialfix: cleanup _pack_instance_onto_cores()  https://review.openstack.org/58857313:42
openstackgerritStephen Finucane proposed openstack/nova stable/queens: Add unit tests for EmulatorThreadsTestCase  https://review.openstack.org/58857413:42
openstackgerritStephen Finucane proposed openstack/nova stable/queens: Not use thread alloc policy for emulator thread  https://review.openstack.org/58857513:42
openstackgerritBalazs Gibizer proposed openstack/nova master: Use placement 1.28 in scheduler report client  https://review.openstack.org/58366713:44
jaypipescdent: should be done tomorrow. it's a two parter.13:45
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openstackgerritChris Dent proposed openstack/nova master: [placement] Move resource_class_cache into placement hierarchy  https://review.openstack.org/58408514:02
openstackgerritChris Dent proposed openstack/nova master: [placement] ensure_rc_cache only at start of process  https://review.openstack.org/58408614:02
cdentfried_rice: there that pull it out from under os-resource-classes14:03
fried_ricecdent: There was one for traits too?14:07
cdentfried_rice: traits merged long ago14:08
fried_ricehm14:08
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cdentif you're seeing it multiple times now it is because it happens each time a new wsgi-intercept is created14:08
cdentwhich will be for each yaml file14:08
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fried_riceokay, yes, I see now it was just the rc one that was repeating.14:08
cdentand in the non-gabbi tests, for each tests14:08
cdent(it wil be tried, but the global will prevent it)14:08
fried_ricecdent: Is it still appropriate to remove this comment in light of having pulled this out of the os-resource-classes stack? https://review.openstack.org/#/c/584085/2/nova/api/openstack/placement/resource_class_cache.py14:10
cdentit's been moved14:11
fried_riceI'm not really awake enough to suss that out for certain on my own :(14:11
cdentso it is no longer problematic14:11
cdentit could stop being problematic in two ways14:11
cdentand so far we've done one of them, which is sufficient14:11
fried_riceoh, "this file" meaning the file we're in, not the one referenced by the import.14:11
fried_riceWeird place for that comment to have been. Cool.14:12
cdentyeah, something went awry in spacing somewhere in the history14:12
cdentyou've bee bcc'd14:15
cdentbbl14:22
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* fried_rice gives up trying to make sure he is profound, complete, and accurate and just hits the f'ing send button.15:12
cdentgood message15:13
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leakypipescfriesen: it's not an exception to return 0 results though. just like, see my email response to the Oracle guy, it's not an exception for a SELECT statement to return 0 rows.15:17
fried_ricecfriesen: I agree with you that it would be nice if blazar (or whatever) could have captured something from nova, which could have captured something from placement, that it could ultimately bubble up to the user, that would let the user know why we denied their request. Easier said than done, by a long shot.15:18
cfriesenI totally get that it's not an exceptional case for placement itself, and I agree15:18
fried_ricewhich is why we've had the NoValidHost-and-you-have-to-go-digging-in-logs situation forever.15:18
cdentthere's a middle ground here. It's not exceptional that 0 results were returned, but clearly people have no faith that things worked as expectred so want to see where the gap was15:18
cfriesencdent: it's not even necessarly that they have no faith, but that they want to know what went wrong so they can reconfigure the cluster15:19
fried_ricecdent: The working hypothesis is that the middle ground is having more detailed logs in the placement service, yah?15:19
cdentfried_rice: I guess, yeah15:19
fried_riceI mean, surely we're not talking about ?verbose=true where the response includes EXPLAIN output or whatever, are we?15:20
cdenti hope not15:20
cdentcfriesen: does it have to be placement where people look15:20
cfriesenI wouldn't think so.  but right now some logic is hidden away inside placement15:21
fried_riceyes, lots of it, no argument there. Monolithic sql statement gives 0 results, no telling which combination of ON/WHERE subclauses were responsible.15:22
openstackgerritMatt Riedemann proposed openstack/nova master: Avoid live migrate to same host  https://review.openstack.org/54268915:24
fried_riceThe obvious response, as has been stated by leakypipes and others, is to break that monolithic sql statement up and do more of the JOINing, as it were, in python, with helpful debug logs like http://paste.openstack.org/raw/727229/ in between each step.15:24
melwittfwiw, we don't actually want the end user to know the details of why the request failed (hide details of the cloud especially in public cloud settings) but this is more about information for the operator/admin/support people15:24
leakypipescdent: we need to combat the lack of faith with good ol' fashioned missionary work, my friend.15:25
cdentpraise be15:26
leakypipeslord have mercy15:26
fried_riceI think we're not doing that work (splitting monolithic sql) immediately because a) we want to better understand the problem space to make sure that's the/a right thing to do; and b) we have big feature work that we should be concentrating on finishing out, rather than getting distracted (again).15:26
cdentunder his eye15:26
cdentfried_rice++15:27
openstackgerritChris Dent proposed openstack/nova master: [placement] ensure_rc_cache only at start of process  https://review.openstack.org/58408615:28
sean-k-mooneyfried_rice: the perfromce hit to that is why we have never gone that way15:28
melwittalso fwiw, I wasn't seeking feature work, just at a high level was curious what's possible because until that thread, I didn't know it was possible at all15:28
melwittfor me, the thread was informational and not in any way "let's do something about this right now"15:29
fried_ricesean-k-mooney: Whereas that's a concern, I don't think it's the main reason. We did monolithic sql originally for perf reasons (and so leakypipes could show off :) but having started that way, we haven't tried splitting it up because it'd be a bunch of work, and we're not clear on the value.15:29
cfriesenright, I'm in no way saying it needs to be done immediately, but rather something to keep in mind so we don't paint ourselves into a corner15:29
leakypipesmelwitt: I think we're saying this isn't feature work but rather refactoring/cleanup work that has been *delayed* because of feature work (on things like reshaper, which is necessary for nested/NUMA/CPU pinning/GPU/FPGA jazz)15:30
fried_riceI can see where a contributor like cfriesen could construe his position (in openstack and employer terms) in such a way that it makes sense for him to start working on sql-split-and-log as opposed to other feature work :)  Of course, reviewer attention would remain a factor.15:30
sean-k-mooneyfried_rice: perhaps be there is also the argument that is what sql is designed to do so why reinvent it in python our seleves15:30
melwittand I'm not saying it needs to be done at all. just wanted to talk about the issue and share ideas at this stage15:31
sean-k-mooneythat said i understand the debug aspect15:31
leakypipessean-k-mooney: bingo. that was the original argument.15:31
fried_ricesean-k-mooney: True story. I think we're coming to the conclusion that the debug aspect makes it worth reinventing that wheel to some extent.15:31
fried_ricedebug and even just code readability.15:31
melwittI could also see us coming up with a CLI tool that does some placement queries to narrow things and show the caller likely resource culprits15:32
melwittbased on passing in a flavor15:32
sean-k-mooneyim not sure leakypipes has reached that conclutions but i have not read teh email thread yet15:32
leakypipessean-k-mooney: that said, I do believe there's a good middle ground that can be achieved between monster query (and complete lack of visibility) and repeated smaller queries (for each resource class or request group) to increase visibility for the operator.15:32
leakypipessean-k-mooney: which is what I said in my ML response(s)15:32
leakypipeswhich reminds me, I didn't respond directly to cdent's ML response on that thread, which I should have.15:33
sean-k-mooneyya thats a reasonably stance in my book15:33
leakypipessorry about the cdent. :(15:33
cdentit is what it is ;)15:33
leakypipessean-k-mooney: or even a reasonable stance, as it were.15:33
sean-k-mooney:)15:33
* leakypipes morphs into sean-k-mooney's grammar and spell-check bot15:33
cdentI think diagnostic tools that throw changing queries into placement would be useful15:34
cdentmore useful that log digging15:34
cdents/that/than/15:34
leakypipeshas the OP (bnemec I think?) responded to which approach (split queries vs. a diagnostic-y tool) would be more in-line with his needs?15:35
melwittyeah, I don't know why I didn't think of it before but since leakypipes mentioned doing multiple queries and narrowing things down, I realized we could automate that if we take a flavor as an arg15:35
melwittas a CLI tool15:35
fried_riceleakypipes: https://review.openstack.org/#/c/584085/ seems worthy of landing at this stage (post FF, pre release).15:36
sean-k-mooneywell as an on looker im getting the feeling as placement is strarting to mature we are starting to get to the point where the operational aspects such as tooling are becomeing more of a fornt vs raw feature dev/creap15:36
cdentvery true sean-k-mooney15:36
fried_riceleakypipes: Noticed when I was working on the logging thing that the rc_cache was hitting frequently, be nice to get rid of that.15:36
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fried_riceleakypipes: (both patches in that series, tbc)15:37
leakypipesack, on it.15:38
melwittfwiw, our support people have experience a lot of bewilderment when "no allocation candidates" happens and would be grateful for anything that helps them figure out which resource failed. so far, they have learned how to use osc-placement to look at resource providers and such15:38
melwitt*experienced15:38
cdentpre placement what would they do?15:39
cdentfor sake of comparison15:39
melwittand by "anything" that includes docs like a troubleshooting guide15:39
melwittthey'd look at scheduler debug logs15:39
melwittas I described in the thread15:39
leakypipesfried_rice, cdent: both +W'd. nice stuff.15:39
melwittso fwiw I don't think anyone (at least not our support people) are asking for features, they just want to learn what's the new way to troubleshoot15:39
cdentrad, thanks15:39
melwittand I had been thinking since we have one query for allocation candidates, I thought there was nothing we could do in the debug log department15:40
cdentmelwitt: I reckon the big diffrence between the old scheduler logs and now is that the old logs made it clear which type of thing was the killer: "hey there are no hosts with vcpus"15:41
melwittcdent: yes, exactly15:41
cdentthere's not an easy map for that in placement15:41
cdentnot at the level of resource class15:41
melwittright15:41
openstackgerritMatt Riedemann proposed openstack/nova master: Deprecate upgrade_levels options for deprecated/removed services  https://review.openstack.org/58860715:41
melwittlast night I was thinking about writing up a doc for our docs with some troubleshooting tips. and maybe I could come up with a CLI tool for nova/tools/ that can do some queries and dump some info using osc-placement underneath based on a flavor passed in15:43
cdentat least exploring those things will lead somewhere15:45
cdentleakypipes, fried_rice in case neither of you made it all the way to the endu of the pupdate: I'm taking a vacation15:45
cdent(from the pupdate itself)15:45
fried_ricecdent: Yup, saw that. Haven't decided whether to act on it.15:46
cdentI don't reckon immediate action is required, because of the current position in the cycle15:46
openstackgerritMatt Riedemann proposed openstack/nova master: Deprecate upgrade_levels options for deprecated/removed services  https://review.openstack.org/58860715:53
leakypipescdent: I appreciate all the hard work you put into the pupdates. I can't commit to taking it on, but I will see what I can do about continuing at least a partial update for folks on the ML.15:53
cdentOnce stein starts up, I might pick it up again. I worry that without doing it, I'll have no idea what's going on15:54
cdentwe'll see.15:54
leakypipescdent: well, we can discuss it in September. for now, just know we appreciate your efforts in doing this.15:55
cdentthanks15:55
fried_rice++15:56
openstackgerritMatt Riedemann proposed openstack/nova master: Reno for notification-transformation-rocky  https://review.openstack.org/58840315:57
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-openstackstatus- NOTICE: The infra team is renaming projects in Gerrit. There will be a short ~10 minute Gerrit downtime in a few minutes as a result.16:03
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cdentleakypipes, fried_rice: can I safely abandon https://review.openstack.org/#/c/587050/ in favor of some the other exploration that has happened since then or is it (one of the simpler options) still an option?16:09
fried_ricecdent: I think it's worth keeping open for now.16:10
cdentokee16:10
fried_ricecdent: It's *almost* the same as https://review.openstack.org/#/c/588091/ -- except in reverse, kinda.16:11
* cdent nods16:11
fried_riceYou're removing the second one; I'm removing the first one.16:12
cdentIt would make me a lot happier if something, somewhere, would break when we makes these kinds of changes16:13
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leakypipescdent: gerrit's down. can't see those patches just now.16:15
fried_ricecdent: You'll break tests on top of the reshaper stack for sure. It adds tests that actually check the number of calls.16:17
fried_ricewhich is why mine are failing.16:17
cdentthat's a bit artificial. I mean functionality changing16:18
fried_ricewell, yes. Unless it's truly not necessary. Which is kind of what we've been hoping, the best-case scenario, nicht war?16:18
fried_rices/war/wahr/16:19
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openstackgerritMatt Riedemann proposed openstack/nova master: Remove unused flavor_delete_info() method  https://review.openstack.org/58862116:45
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openstackgerritLee Yarwood proposed openstack/nova master: fixtures: Track volume attachments within CinderFixtureNewAttachFlow  https://review.openstack.org/58701316:56
openstackgerritLee Yarwood proposed openstack/nova master: Add regression test for bug#1784353  https://review.openstack.org/58701416:56
openstackgerritLee Yarwood proposed openstack/nova master: compute: Recreate volume attachments during a reschedule  https://review.openstack.org/58707116:56
openstackgerritMatt Riedemann proposed openstack/nova master: Fix host validity check for live-migration  https://review.openstack.org/40100917:05
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-openstackstatus- NOTICE: Project renames and review.openstack.org downtime are complete without any major issue.17:29
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openstackgerritMerged openstack/nova master: Reno for notification-transformation-rocky  https://review.openstack.org/58840318:49
openstackgerritChris Dent proposed openstack/nova master: [placement] ensure_rc_cache only at start of process  https://review.openstack.org/58408618:55
cdentfried_rolls, leakypipes : that fixes the failing unit test (which I hadn't thought about because "unit" but they aren't really unit tests)18:56
leakypipesack19:10
openstackgerritMerged openstack/nova master: [placement] Move resource_class_cache into placement hierarchy  https://review.openstack.org/58408519:17
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leakypipescdent: Wallaby'd.19:26
cdenthuzzah19:26
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openstackgerritMatt Riedemann proposed openstack/nova master: Remove old check_attach version check in API  https://review.openstack.org/58834820:05
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openstackgerritMatt Riedemann proposed openstack/nova master: Fix image-defined numa claims during evacuate  https://review.openstack.org/58865720:59
openstackgerritEric Fried proposed openstack/nova master: Remove redundant _update()s  https://review.openstack.org/58809121:22
fried_ricecdent, leakypipes: ^ I think this one ought to pass all tests at this point. What are we going need to do to achieve confidence that any of these forays into update deduplication are actually viable for mergitude?21:23
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openstackgerritMatt Riedemann proposed openstack/nova master: Optimize AZ lookup during schedule_and_build_instances  https://review.openstack.org/58866521:29
openstackgerritMatt Riedemann proposed openstack/nova master: Use CONF.long_rpc_timeout in post_live_migration_at_destination  https://review.openstack.org/58866821:47
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openstackgerritMatt Riedemann proposed openstack/nova master: Update RequestSpec.flavor on resize_revert  https://review.openstack.org/58868923:14
openstackgerritMerged openstack/nova master: Remove unused flavor_delete_info() method  https://review.openstack.org/58862123:18
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