Wednesday, 2019-01-02

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openstackgerritJie Li proposed openstack/nova master: Add microversion 2.68 to support for volume-backed server rebuild  https://review.openstack.org/62751802:39
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openstackgerritJie Li proposed openstack/nova master: Add compute version 37 to support volume backed server rebuild  https://review.openstack.org/62589307:32
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openstackgerritJie Li proposed openstack/nova master: Add microversion 2.68 to support for volume-backed server rebuild  https://review.openstack.org/62751807:50
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openstackgerritLee Yarwood proposed openstack/nova master: libvirt: Add workaround to cleanup instance dir when using rbd  https://review.openstack.org/61847810:46
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openstackgerritLee Yarwood proposed openstack/nova master: libvirt: Add workaround to cleanup instance dir when using rbd  https://review.openstack.org/61847810:53
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nehaalhatHi, I am trying to run tox -e pep8 and getting below issue...is any one have some idea about this?10:59
nehaalhatCould not find a version that satisfies the requirement kombu===4.2.2 (from -c https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt (line 442))10:59
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openstackgerritMerged openstack/nova stable/rocky: Document using service user tokens for long running operations  https://review.openstack.org/62657811:22
openstackgerritLee Yarwood proposed openstack/nova stable/rocky: libvirt: Add workaround to cleanup instance dir when using rbd  https://review.openstack.org/62795811:31
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fricklernehaalhat: yes, this is a known issue, a fix to requirements is being merged. see https://review.openstack.org/62792512:09
frickleralso https://storyboard.openstack.org/#!/story/200468512:12
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openstackgerritMerged openstack/nova stable/rocky: Ensure rbd auth fallback uses matching credentials  https://review.openstack.org/62700912:53
openstackgerritMerged openstack/nova stable/rocky: Fix a broken-link in nova doc  https://review.openstack.org/62658112:53
openstackgerritMerged openstack/nova stable/rocky: Fix a broken-link in nova doc  https://review.openstack.org/62658012:53
openstackgerritMerged openstack/nova stable/rocky: Fix an inaccurate link in nova doc  https://review.openstack.org/62657912:53
openstackgerritIfat Afek proposed openstack/nova master: The field instance_name was added to InstanceCreatePayload  https://review.openstack.org/62796712:57
openstackgerritMerged openstack/nova stable/rocky: Exclude build request marker from server listing  https://review.openstack.org/62658412:59
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alex_xujaypipes: appreciate if you can take a look at the reply https://review.openstack.org/#/c/601596/4/specs/stein/approved/virtual-persistent-memory.rst@123, just want to ensure we express our thought clearly, I try to avoid coding the size into the RC name and standard the RC in the beginning. If that isn't a thing we care about, we are happy to move to the direction you suggestted.13:24
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* alex_xu guess nobody back from holiday yet13:33
cdentalex_xu: I'm sort of back, but struggling to get going. Happy New Year.13:46
alex_xucdent: ha, Happy New Year :)13:46
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jaypipesalex_xu: just recovering from vacation. will try to get to that ML post later this morning.14:02
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openstackgerritMatt Riedemann proposed openstack/nova stable/queens: Ensure rbd auth fallback uses matching credentials  https://review.openstack.org/62701014:06
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jaypipesalex_xu: k, responded on the ML post.14:47
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efriedo/15:02
efriedDid I miss anything?15:03
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openstackgerritDongcan Ye proposed openstack/nova master: Reword volume snapshot create  https://review.openstack.org/62345615:18
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mriedemdansmith: re cross-cell resize poc v2 to be more aligned with normal resize flow, i've got a problem which i need confirmation,16:12
mriedemi'm trying to do an early prep_resize type thing on the dest which will do the resize_claim which creates the migration context,16:13
mriedemproblem is, at that point, the instance records are only in the source cell db and the context is targeted to the source cell, even though i'm running this code on the dest host in the dest cell - but i don't think that will work because i recall that the targeting on the context is lost over rpc right?16:13
mriedemso any db stuff on the dest host at that point will try to go to conductor in the dest and blow up b/c the instance doesn't exist in that db yet16:14
mriedemit works in functional tests b/c of our CheatingSerializer fixture and the CellDatabase fixture defaults to cell116:15
dansmithwell, yeah, the targeting is lost over RPC, but that's not really your problem -- it's that you can't do things in the target db for a given instance until the instance is created right?16:15
dansmithyou need the resize-like pre-claim because of non-normal resources like numa stuff?16:15
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dansmithbecause I think we should be trying to minimize our dependence on old-school claims like that16:16
dansmithwhere possible of course16:16
mriedemwell, that and the resize_claim creates the migration context, which i'm still not really convinced i need yet - but i could create the migration context in conductor outside of the resize_claim code if i do need it16:17
mriedembut yeah, trying to align more with the existing resize flow per spec feedback16:17
dansmithyeah16:17
dansmithwell, you can't create the migration context in condutor until the instance is created anyway right?16:17
mriedemthis wasn't a problem in the shelve poc b/c i didn't touch the target cell until after i'd created the db records there16:17
mriedemi can create the migration context in the source cell db if i need it16:18
mriedemand then mirror it over16:18
dansmithah, sure16:18
dansmithif that works16:18
mriedemthe problem with the shelve poc then is i'm waiting a long time to do any claims in the dest16:18
mriedemi.e. after snapshot and shelving in the source16:19
mriedemwhich could be a long time for a big root disk16:19
dansmithyeah, and even if you claim resources in placement you may not have the numa/cpu resources you expect16:19
dansmithI guess with shelve you delay scheduling super late altogether, but with the more-like-resize case, you can't really reserve all the resources you need until you have an instance created there16:20
dansmithso in the latter case, you _could_ go ahead and create the instance in the cell db right?16:20
dansmithalso, I know it's been a while, but I don't think I said "we shouldn't do this will shelve" I just said "some of these attributes are not ideal" right?16:21
mriedemregarding scheduling, that happens the same either way (shelve or more-like-resize)16:22
mriedemwe don't go down the new conductor task route unless the scheduler picks a host in another cell16:23
mriedemso for the more-like-resize option, i could create the db records early in the dest cell yet16:23
mriedem*yeah16:23
dansmithah, right, right16:24
dansmithI forgot that we don't do this unless the scheduler picks another cell16:24
mriedemeven with my shelve poc, i see that my early verify code won't work there either - because that's running code on the dest host in the dest cell16:26
mriedemso likely either route is going to require creating the instance record and friends in the dest cell db early in the process16:26
* dansmith nods16:27
mriedemand then i likely have some split brain / db syncing that i need to do throughout which sucks but likely unavoidable16:29
dansmithwell,16:29
dansmithdidn't I say something about creating the instance in deleted state so we could avoid that?16:29
dansmithI think you told me why that won't work, but I'm still paging this in16:30
mriedemthat's not really the sync issue i'm thinking of, i'm thinking of like, we create the record in the dest cell db, do the claim which creates the migration context, now if i need to sync that migration context back over to the source cell, i need to do that copy explicitly; likewise, if the source cell changes the task_state on the instance during the process (like resize does), then i might need to sync those changes back ove16:31
mriedem the dest cell instance record as well16:31
dansmithoh16:31
dansmithyeah, I guess16:32
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openstackgerritweizj proposed openstack/python-novaclient master: Update hacking version  https://review.openstack.org/62772616:49
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melwitto/17:01
mriedemdansmith: so i think i'm going to spend some time today updating the spec because the more i work on the code, the more down the rabbit hole i go and likely won't have the spec ready by the time i'm out next week - so my plan is basically get some kind of high level agreement on the spec knowing there will be dragons during implementation, and then i'll be ferreting out those dragons17:12
mriedemi think i at least know enough to know some pros/cons of the shelve vs more-like-resize flow to list those as well17:13
dansmithokay17:14
dansmithwe really need to get more input on it than just me though17:14
mriedemyeah mel and kevin left some feedback as well, and was in line with yours17:14
dansmithoh, okay I hadn't looked yet17:14
mriedemjohn is probably next best to review this given his prior experience17:14
dansmiththat makes me feel better17:14
dansmithyeah17:14
dansmithah I see melwitt's comments were a little more anti-shelve than my waffling17:16
dansmithso that makes what you were saying earlier make more sense17:16
melwittwell, how I feel is I think it's hard to be definitive about shelve vs not, as both approaches have their cons, those were my initial impressions reading through. it doesn't seem like there's a great answer here and I expect us to go ahead with whichever approach mriedem thinks will be cleaner based on all of the work he's done17:23
dansmithmriedem: melwitt: I replied to a few comments from melwitt17:32
dansmithmelwitt: yeah either will be disruptive and tons of work for sure17:33
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jaypipesmriedem: save me from needing to go through the code... on unshelve do we allow changing the flavor or image?17:41
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mriedemjaypipes: no17:49
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jaypipesmriedem: k, thanks17:50
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redkriegHi, I'm interested in changing the vif driver for an existing instance but I don't see any differences between an instance created with an image that has the hw_vif_model property set to e1000 and one with the default virtio.  is there a way to change it with the openstack cli or does it have to be done in the libvirt xml file?21:22
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redkriegI have the same question about cpu passthrough as well, if anyone sees this later.21:36
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openstackgerritBelmiro Moreira proposed openstack/nova master: Change to debug repetitive info messages  https://review.openstack.org/62805822:31
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openstackgerritBelmiro Moreira proposed openstack/nova master: Change API unexpected exception message  https://review.openstack.org/62806122:40
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