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#openstack-nova - 2017-01-27
16:53:16 superdan sdague: if you mean cross in the "unhappy" sense, you're misinterpreting my exhaustion
16:53:38 cdent I think it was "cross" as in "interleaved"
16:53:42 openstackgerrit John Garbutt proposed openstack/nova: Scheduler calling the Placement API https://review.openstack.org/417961
16:53:49 superdan sdague: I think that check should be in there given the requirement we're adding that it be right at scheduler start, but I'm okay to wait until later if you think it's best
16:53:52 superdan cdent: okay, cool
16:54:28 cdent johnthetubaguy: why are they not there anymore? (not asserting they are, just tracing your thought process)
16:55:00 openstackgerrit Stephen Finucane proposed openstack/nova: console: Move proxies to 'console/proxy' https://review.openstack.org/408192
16:55:03 johnthetubaguy cdent: because the code now only creates inventory entires for the new custom resource class
16:56:05 figleaf johnthetubaguy: existing ironic nodes won't have the custom resource class set
16:56:09 cdent johnthetubaguy: so if a new ironic thing comes into existence, with a defined, resource class, that's when we run into trouble?
16:56:18 figleaf johnthetubaguy: so they'll get handled like they were vms
16:56:21 johnthetubaguy cdent: yes
16:56:34 figleaf johnthetubaguy: ah
16:56:59 figleaf johnthetubaguy: so your concern is that we don't have the ironic-aware bits to select a resource provider?
16:57:06 mriedem andreykurilin: your upper-constraints dreams have come true https://review.openstack.org/#/c/426116/5/upper-constraints.txt@332
16:57:25 openstackgerrit Sarafraj Singh proposed openstack/nova: Adopts keystoneauth with glance client. https://review.openstack.org/412634
16:57:25 andreykurilin mriedem: \o/
16:57:46 johnthetubaguy figleaf: ish, its basically that this method will fail (looking for link)
16:58:45 johnthetubaguy figleaf: ah, so this will fail, when there is a new style ironic resource provider being used by a new instance that is created: https://github.com/openstack/nova/blob/master/nova/scheduler/client/report.py#L664
16:58:50 johnthetubaguy figleaf: at least I think it will
16:58:51 openstackgerrit Sarafraj Singh proposed openstack/nova: Adopts keystoneauth with glance client. https://review.openstack.org/412634
16:58:55 sfinucan Interesting problem here - I've backported a bugfix that's exposed a latent Python 3 issue in the code https://review.openstack.org/#/c/425087
16:59:11 johnthetubaguy figleaf: cdent: maybe a quick google hangout would make this easier to talk through?
16:59:14 sfinucan Wonder if I should fix the Python 3 issue or drop the test?
17:01:48 figleaf johnthetubaguy: maybe, but I'm switching context to follow the code through the different parts
17:02:16 figleaf johnthetubaguy: I can't keep it all straight while working on something else :)
17:02:23 johnthetubaguy figleaf: no worries, it took me a good while to trace all that back too
17:05:45 superdan sdague: I have to merge something in devstack to make grenade consider a new projects/XX_thing plugin?
17:06:32 cdent johnthetubaguy: will objects.InstanceList.get_by_host_and_node return ironic things?
17:06:54 johnthetubaguy cdent: I believe it does
17:07:22 superdan cdent: it'll return ironic instances yeah
17:07:56 cdent k, thanks johnthetubaguy and superdan, trying to properly trace the code (as figleaf said, is meandering...)
17:09:01 superdan sdague: oh, nm I think i see
17:12:01 openstackgerrit John Garbutt proposed openstack/nova: Scheduler calling the Placement API https://review.openstack.org/417961
17:12:02 openstackgerrit John Garbutt proposed openstack/nova: Block starting compute unless placement conf is provided https://review.openstack.org/425806
17:13:13 mriedem johnthetubaguy: ah i see you updated it :)
17:13:19 mriedem was just leaving comments, will finish that up on the older PS
17:13:46 johnthetubaguy mriedem: hopefully, that was a rebase, but I think it was superdan 's change that failed to merge, but never mind
17:15:57 mriedem johnthetubaguy: just posted comments in PS36
17:16:37 jroll mriedem: sure why not :P
17:16:55 johnthetubaguy mriedem: I thought I had removed all that :S
17:17:50 mriedem johnthetubaguy: want to update the wording on https://review.openstack.org/#/c/425806/4/nova/exception.py ?
17:17:53 mriedem while you're at it
17:18:31 johnthetubaguy mriedem: aye
17:18:43 figleaf johnthetubaguy: cdent: so update_instance_allocation() should only be called for "old-style" allocations. create_provider_allocations() should be called for "new-style" (i.e., ironic with custom RC)
17:19:15 superdan mriedem: johnthetubaguy I'm going to avoid rechecking the nova scheduler patch until I have reasonable faith in the refactor to move placement into its own top-level
17:19:16 superdan just FYI
17:19:43 jroll More than one endpoint exists with the name 'placement'. <- not cool, devstack, not cool
17:19:56 figleaf johnthetubaguy: cdent: what it looks like is that we need to make sure that the update_instance_allocation() calls are all checked to make sure that they aren't called for new ironic nodes
17:20:19 mriedem johnthetubaguy: i'll go through PS38 too
17:20:36 johnthetubaguy figleaf: but there are no new calls right now, so surely we need someone to claim the new resource class?
17:21:36 figleaf johnthetubaguy: I only see two places where update_instance_allocations() is called in the RT.
17:21:44 johnthetubaguy figleaf: I would rather update_instance_allocation() was able to know from the instance what resources it should be claiming, and it just claims the correct ones, for now thats a bit hard coded I guess, but eventually its the same logic the scheduler has to do when requesting the correct resource class
17:22:24 figleaf johnthetubaguy: yeah, this is all transitional code
17:22:59 figleaf johnthetubaguy: we wanted to get ironic handled before we are able to handle all types of RPs
17:23:21 figleaf johnthetubaguy: can you think of a test that would fail now with ironic?
17:23:42 johnthetubaguy figleaf: add resource class on ironic node, boot instance that will land there, resource claim fails
17:23:50 johnthetubaguy figleaf: at least, thats the way it looks to me
17:23:56 cdent figleaf, johnthetubaguy my read of the code in the rt ironic inventory patch is that johnthetubaguy is right: it is possible to reache update_instance_allocation with a compute node and an instance and depending on what "compute_node" is, the allocations will either fail, or apply to the nova-compute node, incorrectly
17:24:19 cdent because the data at that point is about resource usages (vcpu etc)
17:24:49 johnthetubaguy yeah, instead of allocating for vcpu, it should be for the custom resource class, I think
17:25:21 cdent which should mean that the ironic "instance" is not include in the loop that is calling update_instance_allocation
17:25:21 johnthetubaguy oh balls...
17:25:27 cdent because it isn't really an instance
17:25:36 cdent (in that context)
17:25:45 johnthetubaguy if we merge the code to query placement, we will never land on an iroinc node in the first place, unless it is reporting VCPU resources
17:26:02 figleaf johnthetubaguy: that's a known issue
17:26:11 cdent "oh balls" means we've passed the "bugger" state of affairs
17:26:23 johnthetubaguy cdent: heh, ack
17:26:25 figleaf johnthetubaguy: which is why ironic has to keep reporting vm-type resources until Pike
17:26:45 johnthetubaguy figleaf: but this code doesn't do that, I thought
17:27:00 cdent brb
17:27:21 figleaf johnthetubaguy: digging into the claim stuff - haven't looked at that in a while
17:28:43 johnthetubaguy figleaf: actually, I am changing my mind on the fix here, I think its probably just that we should still be reporting VCPUs, we can't drop those till we schedule based on the new resources
17:29:25 figleaf johnthetubaguy: yes, that's been the plan
17:30:09 johnthetubaguy figleaf: but the code only reports the custom resource classes, or did I read that wrongly?
17:30:35 cdent johnthetubaguy, figleaf: can we restate the problem again (I know we keep doing that, but I think it is useful): If we released this code today without any change it would be wrong because:
17:31:31 figleaf cdent: ...once an ironic node reports resources with a custom resource class, all the VCPU etc. stuff gets removed
17:31:49 figleaf cdent: ...and we have no way to then select that ironic node
17:32:04 figleaf johnthetubaguy: cdent: Does that sound right?
17:32:06 openstackgerrit John Garbutt proposed openstack/nova: Block starting compute unless placement conf is provided https://review.openstack.org/425806
17:32:12 cdent "reports resources" == writes inventory?
17:32:20 figleaf yeah
17:34:06 figleaf cdent: the _cleanup_ironic_legacy_allocations() method removes all the old-style inventory
17:34:48 cdent (if there was any)
17:35:04 mriedem the funny thing is, ironic + placement in newton doesn't work anyway
17:35:13 figleaf cdent: well, unless the node is newly-added, there will be
17:35:20 mriedem i.e. https://review.openstack.org/#/q/status:open+project:openstack/nova+branch:stable/newton+topic:bug/1647316
17:35:51 figleaf mriedem: yeah - "funny"
17:35:51 cdent figleaf: right, but when a node is newly added the same problem exists: there's no way to allocate or claim inventory?
17:36:10 johnthetubaguy mriedem: its almost like we need some ironic testing
17:36:27 mriedem johnthetubaguy: we have it in ocata
17:36:32 mriedem just not in newton where placement was optional
17:36:41 johnthetubaguy mriedem: ah
17:36:46 mriedem ironic + placement ci was broken for a few days in master
17:36:54 figleaf cdent: if a node is added and has a custom RC, its inventory will be added new-style
17:36:56 mriedem which is why i'm backporting that series of fixes
17:37:05 cdent figleaf: yes, but you can't allocate against it
17:37:06 jroll bah, no '-' in custom resource classes? :|
17:37:08 figleaf cdent: and we have no way to select that node now

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