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| openstackgerrit | Takashi NATSUME proposed openstack/nova master: Enable cold migration with target host(1/2) https://review.openstack.org/408955 | 00:33 |
|---|---|---|
| openstackgerrit | Takashi NATSUME proposed openstack/nova master: Enable cold migration with target host(2/2) https://review.openstack.org/408964 | 00:33 |
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| openstackgerrit | Takashi NATSUME proposed openstack/nova master: List/show all server migration types (1/2) https://review.openstack.org/430608 | 00:34 |
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| openstackgerrit | Takashi NATSUME proposed openstack/nova master: List/show all server migration types (2/2) https://review.openstack.org/459483 | 00:34 |
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| openstackgerrit | Takashi NATSUME proposed openstack/python-novaclient master: Microversion 2.46 - List/Show all server migration types https://review.openstack.org/430839 | 00:39 |
| openstackgerrit | Takashi NATSUME proposed openstack/python-novaclient master: Microversion 2.46 - Enable cold migration with target host https://review.openstack.org/406707 | 00:40 |
| openstackgerrit | Takashi NATSUME proposed openstack/nova master: Add functional tests for cold migration to same host https://review.openstack.org/414926 | 00:41 |
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| openstackgerrit | Takashi NATSUME proposed openstack/nova master: api-ref: Add parameters in cold migrate action https://review.openstack.org/410042 | 00:41 |
| openstackgerrit | Takashi NATSUME proposed openstack/nova master: api-ref: Add parameters in cold migrate action https://review.openstack.org/410042 | 00:41 |
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| openstackgerrit | Zhaokun Fu proposed openstack/nova-specs master: fix typos https://review.openstack.org/464906 | 02:41 |
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| openstackgerrit | jichenjc proposed openstack/nova-specs master: WIP: add z/VM Driver https://review.openstack.org/464915 | 03:21 |
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| openstackgerrit | jichenjc proposed openstack/nova-specs master: WIP: add z/VM Driver https://review.openstack.org/464915 | 03:33 |
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| openstackgerrit | Takashi NATSUME proposed openstack/nova master: api-ref: Example verification for servers-actions.inc https://review.openstack.org/454565 | 05:28 |
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| openstackgerrit | Béla Vancsics proposed openstack/nova master: Transform instance.trigger_crash_dump notification https://review.openstack.org/396225 | 06:54 |
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| openstackgerrit | Lee Yarwood proposed openstack/nova master: libvirt: Refactor encryptor attach and detach calls https://review.openstack.org/460243 | 08:23 |
| openstackgerrit | Lee Yarwood proposed openstack/nova master: libvirt: Attach and detach encryptors during swap_volume https://review.openstack.org/460244 | 08:23 |
| lyarwood | mdbooth: ^ if you have any review time today your thoughts on these would be appreciated | 08:23 |
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| openstackgerrit | falseuser proposed openstack/nova master: Clear instance root_device_name in rebuild operation https://review.openstack.org/464991 | 08:51 |
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| openstackgerrit | jichenjc proposed openstack/nova master: Use plain routes list for os-certificates endpoint instead of stevedore https://review.openstack.org/460813 | 09:37 |
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| openstackgerrit | jichenjc proposed openstack/nova master: Add missing rootwrap filter for cryptsetup https://review.openstack.org/462348 | 09:40 |
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| openstackgerrit | Takashi NATSUME proposed openstack/nova-specs master: Amend the "list-show-all-server-migration-types" spec https://review.openstack.org/460847 | 09:45 |
| openstackgerrit | Takashi NATSUME proposed openstack/nova-specs master: Abort Cold Migration https://review.openstack.org/334732 | 09:47 |
| openstackgerrit | Takashi NATSUME proposed openstack/nova-specs master: Specify keymap on server boot https://review.openstack.org/448830 | 09:47 |
| openstackgerrit | jichenjc proposed openstack/nova master: [placement] Add api-ref for /resource_classes/{name} https://review.openstack.org/462837 | 09:49 |
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| openstackgerrit | Matthew Booth proposed openstack/nova master: libvirt: Use SubclassSignatureTestCase on all volume drivers https://review.openstack.org/465022 | 10:36 |
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| openstackgerrit | melanie witt proposed openstack/nova master: WIP Cache database and message queue connection objects https://review.openstack.org/465042 | 11:20 |
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| openstackgerrit | Monty Taylor proposed openstack/nova master: WIP Add description of server addresses objects https://review.openstack.org/464331 | 11:56 |
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| alex_xu | gmann: thanks! | 12:18 |
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| alex_xu | sdague: johnthetubaguy are we real going to fix something like change status from 202 to 204? like this bug https://bugs.launchpad.net/nova/+bug/1579876. I'm think whether I should mark it as 'won't fix' | 13:19 |
| openstack | Launchpad bug 1579876 in OpenStack Compute (nova) "os-resetState should return a 204 rather than a 202" [Low,Triaged] | 13:19 |
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| sdague | alex_xu: right now it seems really low priority to fix | 13:19 |
| alex_xu | sdague: yea, agree that it is super low. and I actually think about we are never going to fix it. | 13:20 |
| sdague | yeh | 13:20 |
| sdague | honestly, Opinion / Wishlist is how I would file the bug | 13:20 |
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| alex_xu | sdague: ok, got it | 13:21 |
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| bauzas | dansmith: edleafe: sorry for not yet uploading my series, but I discovered some possible issues that I'm not wanting | 13:31 |
| dansmith | ...alright | 13:32 |
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| dansmith | sdague: so, setting ulimit so mysql can actually use the number of connections we have configured seems to have made the test pass | 13:41 |
| dansmith | sdague: I'm running again to get another sample | 13:41 |
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| bauzas | dansmith: for example, now that we will pass N nodes back to the conductor for rescheduling, we still want to only consume the first one in the scheduler | 13:46 |
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| dansmith | okay | 13:47 |
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| openstackgerrit | dane-fichter proposed openstack/nova master: Add trusted certificates to InstanceExtras https://review.openstack.org/457711 | 14:15 |
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| openstackgerrit | Gábor Antal proposed openstack/nova master: Transform instance.resize_prep notification https://review.openstack.org/465081 | 14:27 |
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| mriedem | o/ | 14:28 |
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| mriedem | someone want to put this veritas libvirt volume driver through so we can close the blueprint? https://review.openstack.org/#/c/443951/ | 14:29 |
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| mdbooth | mriedem: The connection_info munging in there is evil and undocumented, btw | 14:33 |
| mriedem | mdbooth: i realize the connection_info dict from cinder is a vendor-specific wild west | 14:34 |
| mriedem | i flirted with the idea of trying to formalize that into a versioned object in cinder/os-brick years ago, but never had enough energy to really work on that | 14:34 |
| mdbooth | Right, but in general we erect a 'wild west fence' around it with os-brick, right? | 14:34 |
| mriedem | mdbooth: the same can be said for port binding details in neutron | 14:34 |
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| * mdbooth looks at the os-brick driver to try to work out what that stuff is for | 14:35 | |
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| openstackgerrit | Alvaro Lopez Garcia proposed openstack/nova master: Ensure that periodic reclaim cleans DB deleted instances https://review.openstack.org/323250 | 14:36 |
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| mriedem | mdbooth: i don't think os-brick is really actually involved much here for connection_info, | 14:39 |
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| lyarwood | mriedem: we did bring that up again with walter during summit btw, agreed we should do it, just need people as with every other bug, feature, focus area within OpenStack atm. | 14:39 |
| mriedem | nova calls os-initialize_connection in the cinder api which calls down to the volume driver and return the dict back to nova | 14:39 |
| mriedem | the connector dict is created in os-brick and is something else i toyed with formalizing | 14:40 |
| mriedem | but abandoned | 14:40 |
| mdbooth | mriedem: What else would the extra info in connection_info be for? | 14:40 |
| mdbooth | For terminate_connection? | 14:40 |
| lyarwood | mdbooth: it's for libvirt most of the time | 14:40 |
| lyarwood | mdbooth: source_path etc | 14:40 |
| mriedem | lyarwood: mdbooth: https://review.openstack.org/#/c/269867/ | 14:40 |
| mdbooth | lyarwood: Right, there's device_path | 14:41 |
| mdbooth | That's become kinda standardised | 14:41 |
| mriedem | there are definitely some 'standard' things we can usually expect in connection_info, | 14:41 |
| mriedem | and then vendor-specific extras | 14:41 |
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| mdbooth | lyarwood mriedem: So I'm looking specifically here: https://review.openstack.org/#/c/443951/15/nova/virt/libvirt/volume/vrtshyperscale.py | 14:41 |
| mriedem | sort of like what is being attempted with cleaning up the instance diagnostics stuff in nova | 14:41 |
| mdbooth | We're getting device_info back from os-brick, and stuffing some of it into connection_info | 14:42 |
| mdbooth | That's unusual, and there's no comment explaining why we do it | 14:42 |
| mdbooth | Take 'vsa_ip' | 14:42 |
| mdbooth | I don't see where that information would be subsequently used. It's not used by os-brick's disconnect_volume for that driver. | 14:43 |
| mdbooth | The only place I can think off the top of my head would be terminate_connection | 14:43 |
| lyarwood | mdbooth: yeah agreed, unless get_config is going to use it I can't see why would stash it, unless they have plans to use it in the future? | 14:43 |
| mdbooth | lyarwood: Does that make more sense to you? | 14:43 |
| mriedem | we don't pass the connection_info over to terminate_connection | 14:43 |
| mriedem | just the connector | 14:44 |
| mdbooth | mriedem: Ah, not even there, then | 14:44 |
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| mdbooth | I thought we did pass it back to cinder in that case | 14:44 |
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| mriedem | so yeah good point on stashing stuff in connection_info after calling os-brick, i'm not sure why that's there | 14:44 |
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| mriedem | mdbooth: i dropped my +2 if you want to ask why they are doing that | 14:45 |
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| mdbooth | mriedem: Done. You notice I also wrote your prior patch btw? ;) | 14:46 |
| mriedem | mdbooth: i didn't | 14:47 |
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| mriedem | sorry i was hoping the irc pings notified you that i wrote a patch | 14:48 |
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| mdbooth | mriedem: NP, it only took a couple of minutes anyway :) Pretty obvious and can't remember why I didn't do it like that originally. | 14:49 |
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| mriedem | still looking for core reviews on this upgrade issue for cells v2 https://review.openstack.org/#/c/464088/ | 14:53 |
| mriedem | ^ needs to go back through newton | 14:53 |
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| cfriesen | kashyap, you on? | 15:06 |
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| sdague | dansmith / melwitt was anything figured out about db connection leaks yesterday? | 15:10 |
| cfriesen | there's someone on the openstack-dev mailing list asking about whether the cpu-throttle-initial and cpu-throttle-increment options in libvirt auto-converge are stable enough to use....anyone have any thoughts? The Newton spec said not, but that was a while ago now. | 15:10 |
| dansmith | sdague: earlier this morning I said that raising ulimit to actually allow the number of connections we have configured seems to resolve my problem | 15:11 |
| sdague | oh, I see it now | 15:11 |
| dansmith | sdague: I'm about finished with a second run to get another sample, which appears to also have worked | 15:11 |
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| mriedem | shouldn't ulimit be 64k in deployment now? | 15:11 |
| sdague | ok, cool, because our ulimit is 1024 by default or something | 15:11 |
| mriedem | deployment == devstack? | 15:11 |
| dansmith | sdague: this bit: https://review.openstack.org/#/c/436094/28/lib/databases/mysql | 15:12 |
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| sdague | ok cool | 15:13 |
| dansmith | sdague: so, I dunno whether to just (ask you to allow) that into devstack or what | 15:14 |
| openstackgerrit | Stephen Finucane proposed openstack/nova master: Use plain routes list for os-services endpoint instead of stevedore https://review.openstack.org/460818 | 15:14 |
| dansmith | sdague: 1024 still seems high, but we do have a bunch of databases, tables, and connections going on... | 15:14 |
| sdague | dansmith: yeh, if we've got 1024 db connections it feels like ulimit should at least be double that | 15:15 |
| dansmith | okay, I'll split that out and make it 2048 | 15:15 |
| sdague | otherwise it's just shooting ourselves in the foot | 15:15 |
| dansmith | right | 15:15 |
| sdague | dansmith: so... here is what I think we should do | 15:16 |
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| sdague | add a new stackrc variable so that's tunable | 15:16 |
| sdague | default to 2048 | 15:16 |
| dansmith | okay | 15:16 |
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| sdague | do the change early in stack.sh for the system | 15:16 |
| sdague | then if people want to play around with other values for constraints, it's easy | 15:17 |
| dansmith | okay | 15:17 |
| dansmith | by early does that mean in stack.sh or in functions somewhere? | 15:17 |
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| dansmith | and by "for the system" you mean in limits.conf? | 15:18 |
| dansmith | and hope that systemd just inherits that properly when we start mysql? | 15:19 |
| openstackgerrit | Stephen Finucane proposed openstack/nova master: rbd: Remove unnecessary 'encode' calls https://review.openstack.org/412356 | 15:19 |
| sdague | dansmith: well probably build a function for it, but call it before we start any services in stack.sh directly | 15:21 |
| sdague | yeh, limits.conf | 15:21 |
| dansmith | okay | 15:21 |
| sdague | and if set, I'm hoping it inherits through for the world | 15:21 |
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| dansmith | yeah, limits.conf is read by pam, so I'm not sure | 15:22 |
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| dansmith | sdague: just tested, doesn't seem to have any effect | 15:24 |
| dansmith | system limits on the service Imean | 15:24 |
| dansmith | even with a daemon-reload | 15:24 |
| mdbooth | https://access.redhat.com/solutions/1257953 | 15:25 |
| mdbooth | Although I think that's paywalled | 15:25 |
| dansmith | mdbooth: I already set it with systemd and it works | 15:25 |
| dansmith | we were hoping we could do it generically with limits.conf | 15:25 |
| mdbooth | But yeah, systemd doesn't read limits.conf | 15:25 |
| dansmith | sdague: ^ | 15:25 |
| dansmith | sdague: so I'm guessing I just make that stackrc var mysql-specific | 15:26 |
| dansmith | or I can just comment over it that it's only enforced for things that look at it (like mysql) | 15:27 |
| cfriesen | dansmith: would something like this be okay, or is there some reason it would be terrible? http://paste.openstack.org/show/609690/ We're seeing the cache update be somewhat expensive and wondering if we can just batch the cache updates when there are multiple network-changed events in a batch. | 15:29 |
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| dansmith | cfriesen: terrible? you'd never notice cache changes past the first one | 15:30 |
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| mdbooth | cfriesen: Another problem with this kind of cache is that they grow unbounded. Possibly not a practical issue with instance uuids, but still icky. | 15:31 |
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| cfriesen | dansmith: could we remove all network-changed events for this instance from the "events" list, then call self.network_api.get_instance_nw_info()? | 15:34 |
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| sfinucan | mriedem: Could you look at the 'reserve-numa-with-pci' patches at some point this week or next? https://review.openstack.org/#/q/status:open+project:openstack/nova+topic:bp/reserve-numa-with-pci | 15:35 |
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| mriedem | maybe, artom is in front of you | 15:35 |
| cfriesen | dansmith: it seems pointless to call it multiple times if it's going to give us the same answer each time | 15:35 |
| dansmith | cfriesen: eh? the events list is transient.. things get removed from there when processed | 15:35 |
| sdague | hmmmm | 15:35 |
| dansmith | cfriesen: that's the nature of a cache refresh | 15:35 |
| sdague | dansmith: well, what's the set with systemd option? Build that unit file? | 15:36 |
| dansmith | cfriesen: maybe I can't see enough of your change.. are you saying you see a single request to refresh an instance multiple times in the same go? | 15:36 |
| dansmith | sdague: yeah | 15:36 |
| sdague | dansmith: I'm fine fixing it just for the systemd case | 15:36 |
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| sdague | we're default there everywhere | 15:36 |
| dansmith | sdague: okay, but it'll only be for mysql | 15:37 |
| sdague | oh ... let me go look again | 15:37 |
| cfriesen | dansmith: we are coming into this code and there are multiple network-changed events for the same instance, so we end up calling self.network_api.get_instance_nw_info() multiple times | 15:37 |
| dansmith | cfriesen: ah, okay I assumed this was in the periodic | 15:37 |
| dansmith | cfriesen: why is that happening? | 15:37 |
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| cfriesen | dansmith: let me get more context, this was proposed by one of our other guys. | 15:39 |
| dansmith | *facepalm* | 15:39 |
| sdague | dansmith: what about DefaultLimitNOFILE= in /etc/systemd/system.conf | 15:39 |
| sdague | then a daemon restart | 15:39 |
| dansmith | sdague: will that get picked up by a daemon restart? | 15:40 |
| dansmith | I mean reload | 15:40 |
| dansmith | restart is a full re-exec right? | 15:40 |
| bauzas | dansmith: quick question, should you think we would need a new RPC version for adding a "alternatives" key to the returned dict when calling the scheduler API method select_destinations() ? | 15:40 |
| sdague | dansmith: I don't know | 15:40 |
| sdague | but that's where the google's are leading me to | 15:40 |
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| dansmith | sdague: okay will try that | 15:40 |
| bauzas | dansmith: my own opinion is that given we say to first upgrading the conductor, then the conductor is anyway newer that the scheduler, so it would know the new key | 15:41 |
| sdague | dansmith: daemon-reload probably should be tried first | 15:41 |
| dansmith | sdague: yeah | 15:41 |
| openstackgerrit | dane-fichter proposed openstack/nova master: Add trusted certificates to InstanceExtras https://review.openstack.org/457711 | 15:41 |
| dansmith | bauzas: of course, if you're changing the rpc api... you should version that change :) | 15:41 |
| bauzas | dansmith: but I could just add a new RPC API version for not returning the new key in case the asked version is not cool | 15:41 |
| bauzas | dansmith: I'm not modifying the interface | 15:42 |
| bauzas | dansmith: so it's not needing a version | 15:42 |
| bauzas | dansmith: I'm just adding some new key for what we return | 15:42 |
| bauzas | but lemme just upload the change | 15:42 |
| bauzas | and you'll see | 15:43 |
| dansmith | changing the return is changing the api, period. | 15:43 |
| bauzas | okay | 15:44 |
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| cfriesen | dansmith: with regards to the multiple network-changed events for the same instance, this is in the context of a live-migration on a busy system. Adding to the pain is that the "with lockutils.lock" took a long time to be acquired (which seems to be due to the lack of a "fair" lock in oslo). | 15:50 |
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| dansmith | cfriesen: not sure I get it, but if that is just avoiding processing the same instance in a single go, then I guess it makes sense | 15:54 |
| dansmith | (but should use a set() of course) | 15:54 |
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| cfriesen | dansmith: yes, it's just to try to process each instance once. I guess neutron must be batching multiple events in a single call. | 16:02 |
| dansmith | I'm pretty sure they don't | 16:02 |
| cfriesen | dansmith: then why is the code written to handle multiple events per call? | 16:03 |
| dansmith | tbh, I think I'd want an analysis of that first.. like "neutron started batching things in commit <foo> therefore we need this" | 16:03 |
| dansmith | otherwise I'd be highly suspect that something else is going on | 16:03 |
| dansmith | cfriesen: because the whole thing was written to be high bandwidth, but AFAIK, they never used it that way | 16:04 |
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| dansmith | and multiple events of the same instance in a single batch hardly makes sense | 16:04 |
| dansmith | if they're doing that, then there needs to be a fix on both sides, but if you just paper over it here, we'll never find that | 16:04 |
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| melwitt | dansmith, sdague: I did some tests where I ran a subset of tempest locally with concurrency of 4 with and without caching oslo.db transaction context managers and with, it topped out around 90 Threads_connected in mysql and without it was around 140. so it did seem to make a difference. this is the patch I tried https://review.openstack.org/#/c/465042 | 16:08 |
| openstackgerrit | Gage Hugo proposed openstack/nova master: Admin API Policy contingent on is_admin_project https://review.openstack.org/384148 | 16:09 |
| sdague | melwitt: ok, cool, so that's definitely helpful | 16:10 |
| dansmith | sdague: melwitt: I'm not sure I'm surprised by that, up to the limit of the connection pool | 16:10 |
| sdague | melwitt: it feels like we should do that in addition to the raise of the open fds, right? | 16:11 |
| dansmith | the question would be if that continues to grow forever | 16:11 |
| melwitt | the subset I ran was like 'ostestr run --regex tempest.api.compute.servers --concurrency 4' which is about 206 tests | 16:11 |
| dansmith | sdague: melwitt: we also need to keep in mind that we need to be able to flush this cache on SIGHUP if/when we implement that for the list-of-cells cache, else we'll never notice a connection change | 16:11 |
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| cfriesen | dansmith: I think on the neutron side they're using BatchNotifier, calling send_events() (https://git.openstack.org/cgit/openstack/neutron/tree/neutron/notifiers/nova.py#n242) which just blindly fires the events over to nova. | 16:14 |
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| dansmith | cfriesen: sure, but what does that have to do with anything? | 16:15 |
| openstackgerrit | Balazs Gibizer proposed openstack/nova master: use context mgr in instance.delete https://review.openstack.org/443764 | 16:15 |
| cfriesen | dansmith: neutron has multiple network changes over live migration, queues up multiple events for the same instance, and fires them off in a single API call to nova | 16:15 |
| cfriesen | dansmith: nova then updates the cache multiple times for the same instance | 16:15 |
| dansmith | cfriesen: it has multiple plug events, but it should not send multiple refresh-cache events | 16:16 |
| cfriesen | dansmith: it's just a "network-changed" event | 16:16 |
| dansmith | yeah, that | 16:17 |
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| melwitt | dansmith: okay, just looked through the code and I see what you mean. so that one does a load-all-cells once, so it would need to be flushed itself if a new cell is added, right? | 16:19 |
| cfriesen | dansmith: looks like it might send a network-changed event each time a port is updated or a floating ip is updated. | 16:19 |
| dansmith | cfriesen: ...right | 16:19 |
| cfriesen | dansmith: so if you've got 16 ports on an instance... | 16:20 |
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| dansmith | melwitt: we've built multiple lists of cells that will have to be flushed, and this is another, is my only point | 16:20 |
| melwitt | ack | 16:21 |
| dansmith | cfriesen: I understand, but that still doesn't mean that neutron should send a single request with 16 identical events for the same instance | 16:21 |
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| cfriesen | dansmith: oh, I agree. was just trying to show how we could end up in this scenario since earlier you said you were pretty sure neutron didn't do that. | 16:23 |
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| dansmith | cfriesen: I meant for multiple instances | 16:24 |
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| cfriesen | dansmith: with the neutron BatchNotifier code I think neutron just sends all queued notifications every couple seconds | 16:25 |
| cfriesen | dansmith: so I think it could include events for multiple instances | 16:26 |
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| dansmith | cfriesen: that would be a change from how it originally behaved, and would delay instance booting unnecessarily | 16:27 |
| dansmith | I don't see any timing in that code | 16:27 |
| cfriesen | look at neutron/notifiers/batch_notifier.py | 16:27 |
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| dansmith | yeah, that's unfortunate | 16:28 |
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| cfriesen | we'll try pushing a neutron change to remove duplicate network-changed events for the same instance from the batch | 16:30 |
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| dansmith | in your nova dupe check, you should log a warning or something so we can see if this ever regresses once you fix the sending side | 16:31 |
| cfriesen | was just going to ask if we wanted a nova dupe check as well | 16:31 |
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| sean-k-mooney | sfinucan: https://bugs.launchpad.net/nova/+bug/1691178 this is the bug for the qemu cpu affinity ill upload the patch WIP patch in a few minutes but if you have in put on the scheduler question feel free to advise. | 16:41 |
| openstack | Launchpad bug 1691178 in OpenStack Compute (nova) "virt_type=qemu does not support cpu affinity." [Undecided,New] - Assigned to sean mooney (sean-k-mooney) | 16:41 |
| * sfinucan looking | 16:42 | |
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| sean-k-mooney | sfinucan: there isnt much in the bug but i will add you to the review of the code change when i split it out of my other changes. | 16:43 |
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| cfriesen | sean-k-mooney: would we maybe want to make this configurable? otherwise you're going to need nested kvm to test any of the "dedicated" cpu policy stuff | 16:47 |
| cfriesen | (or real hardware) | 16:47 |
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| sean-k-mooney | cfriesen: i was going to make it condtional based on the config value of virt_type | 16:48 |
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| sean-k-mooney | cfriesen: cpu pinning is currently only tested in intels nfv ci | 16:49 |
| sean-k-mooney | cfriesen: i basically looks like this https://pastebin.com/afp0M4Rm | 16:50 |
| sean-k-mooney | im currently rebasing to master | 16:50 |
| sean-k-mooney | cfriesen: sfinucan basically just adding if(CONF.libvirt.virt_type != "qemu"): in 2 places in the libvirt dirver and then i need to check unit tests and update if needed | 16:51 |
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| dansmith | melwitt: your comment about stale objects is about conf change? or are you worried that seldom-used ones will actually become stale in some un-usable way? | 16:53 |
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| sean-k-mooney | cfriesen: sfinucan that change should be in /nova/virt/libvirt/driver.py not /nova/virt/libvirt/config.py ... this is why i never edit diffs/patches | 16:54 |
| efried | I just discovered this (apologies if everyone else knew it already): Add `-a` to journalctl and you get COLORS! | 16:55 |
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| melwitt | dansmith: I was thinking more of the latter, though I can't imagine it being much of a problem in practice. it would be things like, removing cells from the fleet or if a cell went temporarily offline | 16:56 |
| dansmith | hmm | 16:56 |
| melwitt | conf change is important but I wasn't thinking of that yet | 16:56 |
| cfriesen | sean-k-mooney: I know at least some of our devs are testing with virtualbox which doesn't do nested KVM. You'd basically require nested KVM or real hardware to exercise the cpu pinning logic. I think a "permissive_qemu_affinity" config option might make sense, though I know we're trying to get rid of config options in general. | 16:56 |
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| dansmith | we don't have to do something if we restart the db today, right? | 16:56 |
| dansmith | it reconnects for us I think, so I'm not sure we need to actually worry about things going stale | 16:56 |
| dansmith | and by conf change, I mean changing a cell record or something | 16:57 |
| melwitt | I don't think so, no. good point | 16:57 |
| melwitt | yeah, understood. like changing a connection string | 16:57 |
| sean-k-mooney | cfriesen: you dont need nested virt you just need the kvm module loaded in the vm | 16:57 |
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| dansmith | right | 16:57 |
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| cfriesen | sean-k-mooney: the kvm module won't load without nested KVM | 16:57 |
| sean-k-mooney | if they are using virt_type=qemu they cannont use any form of cpu pinning becasue TSG does not support it | 16:58 |
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| cfriesen | sean-k-mooney: it accepts the commands, it just doesn't work properly. :) | 16:58 |
| sean-k-mooney | libvirt throws an error though whne you try to spawn the vm from nova | 16:58 |
| cfriesen | sean-k-mooney: not ours...wonder what version that was added in | 16:59 |
| sean-k-mooney | cfriesen: i am testing with qemu 2.8 | 16:59 |
| sean-k-mooney | i also have libvirt 3.3 form master currently but this happens on older version too | 17:00 |
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| cfriesen | sean-k-mooney: I'm on qemu 2.6 and libvirt 2.0 | 17:00 |
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| sean-k-mooney | cfriesen: im a litlle unfortable adding a new conf option just for this as well if we do they are almost impossible to get rid of | 17:01 |
| cfriesen | sean-k-mooney: we can work around it if necessary | 17:01 |
| sean-k-mooney | cfriesen: do you know is there any way to query this from qemu/libvirt so we could decet at runtime? | 17:02 |
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| cfriesen | sean-k-mooney: no clue. :) I'm a bit surprised that your libvirt complains since for the most part (especially for single-vcpu guests) it seems to work okay. | 17:03 |
| sean-k-mooney | cfriesen: i think it is actully qemu that is complaining rather then libvirt it just passes along the message | 17:06 |
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| sean-k-mooney | cfriesen: libvirt happilly accpts the xml as it is vailid but TCG then complaines when qemu is starting the instance | 17:07 |
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| openstackgerrit | Gage Hugo proposed openstack/nova master: Admin API Policy contingent on is_admin_project https://review.openstack.org/384148 | 17:35 |
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| shewless | Hi. I have an openstack installation that has a working spice console (I can connect to the console via horizon). I'm trying to connect to the console using "virt-viewer" or some other local client instead of from the web. Any hints on how to do this? | 18:04 |
| openstackgerrit | Gábor Antal proposed openstack/nova master: Transform keypair.delete notification https://review.openstack.org/463946 | 18:04 |
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| shewless | Basically I think that nova is serving spice via the html viewer over a proxy .. but I want to access the spice server directly using a spice client (to get audio, etc). | 18:05 |
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| sean-k-mooney | shewless: i belive 'nova help get-spice-console' will provide the info you are looking for | 18:15 |
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| sean-k-mooney | shewless: for my setup at least i dont see a way to connect directly to the spice console though | 18:18 |
| sean-k-mooney | shewless: the different console types available are ['novnc', 'xvpvnc', 'rdp-html5', 'spice-html5', 'serial', 'webmks'] but not just spice | 18:18 |
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| shewless | sean-k-mooney: yeah that command gives me the spice url.. but I haven't been able to use my spice client to connect to that url | 18:27 |
| shewless | I think because it's "http" and not "spice" protocol | 18:27 |
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| sean-k-mooney | shewless: ya im not sure that nova support direct connection as the client would have to connect directly to spice port on the vm via the compute node | 18:28 |
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| shewless | sean-k-mooney: fair enough. Is there a way to get sound to work through the spice html proxy? | 18:29 |
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| jose-phillips | hey | 18:30 |
| sean-k-mooney | not that i have found though usally i just use x11 forwarding over ssh or install vnc in the guest and connect to it over its public ip so i have never tried | 18:30 |
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| mriedem | smcginnis: https://github.com/openstack/nova/commit/564f14f4bc67463d1ef185909e12ab090f10495b ? | 19:12 |
| mriedem | smcginnis: policy is defined in code here https://github.com/openstack/nova/blob/master/nova/policies/assisted_volume_snapshots.py | 19:13 |
| smcginnis | mriedem: Seeing this: http://logs.openstack.org/51/418451/12/check/gate-tempest-dsvm-full-devstack-plugin-nfs-nv/0f06284/logs/screen-c-vol.txt.gz?level=ERROR#_May_16_08_29_46_647815 | 19:13 |
| smcginnis | mriedem: And http://logs.openstack.org/51/418451/12/check/gate-tempest-dsvm-full-devstack-plugin-nfs-nv/0f06284/logs/screen-n-api.txt.gz#_May_16_08_29_46_642168 | 19:15 |
| mriedem | smcginnis: https://github.com/openstack/tempest/commit/529eefabc937b6dc6f7b3fae11b5942cc6ee452e | 19:16 |
| mriedem | new tempest change | 19:16 |
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| mriedem | tempest doesn't gate on FS-style volume backends | 19:16 |
| mriedem | so that's probably it | 19:16 |
| mriedem | http://logstash.openstack.org/#dashboard/file/logstash.json?query=message%3A%5C%22Forbidden%3A%20Policy%20doesn't%20allow%20os_compute_api%3Aos-assisted-volume-snapshots%3Acreate%20to%20be%20performed.%20(HTTP%20403)%5C%22&from=7d | 19:16 |
| mriedem | so yeah that's it | 19:16 |
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| armax | mriedem: we have a winner | 19:18 |
| armax | http://logs.openstack.org/25/465125/1/experimental/gate-tempest-dsvm-neutron-pg-full-ubuntu-xenial/2a7a080/ | 19:18 |
| mriedem | armax: sweet | 19:18 |
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| armax | mriedem: nice one | 19:19 |
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| armax | mriedem: you need to add a test now ;) | 19:19 |
| mriedem | armax: yup, working on it | 19:19 |
| armax | mriedem: you rock | 19:19 |
| mriedem | smcginnis distracted me with all of his NFS love | 19:19 |
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| armax | mriedem: do you want to rerun the job to confirm if there’s another race lurking? | 19:22 |
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| armax | mriedem: I thought you learned the craft of multitasking when you became PTL | 19:22 |
| mriedem | armax: i can run it again yeah while i work on tests | 19:23 |
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| armax | mriedem: does Zuul listens to one whilst there’s still another ongoing run? | 19:24 |
| armax | oh | 19:24 |
| armax | never mind | 19:24 |
| mriedem | armax: i didn't see that you checked experimental before i did | 19:24 |
| mriedem | so i'll have to do it again once that run is done i think | 19:24 |
| armax | didn’t notice that jenkins came back, we’re good | 19:24 |
| mriedem | artom_: let me know if i'm off base here https://review.openstack.org/#/c/415520/ | 19:24 |
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| mriedem | armax: do we need to worry about the subnet being gone too? | 19:34 |
| mriedem | L450 | 19:34 |
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| openstackgerrit | sean mooney proposed openstack/nova master: do not set vcpu_pin elements when virt_type=qemu https://review.openstack.org/465160 | 19:35 |
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| artom_ | mriedem, will do, thanks for the comments! | 19:38 |
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| mriedem | artom: i think we should just get the device metadata first, then attach to the guest, and then if that's fine, do instance.save() to update the db | 19:39 |
| mriedem | then we don't have to worry about rolling back the detach in the guest | 19:39 |
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| armax | mriedem: I’ll reply on the review | 19:43 |
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| artom | mriedem, do we have what we need to build the metadata if we do so before attaching? | 19:51 |
| artom | I'm thinking of PCI and/or MAC addresses | 19:51 |
| mriedem | artom: oh i guess i didn't dig into _build_device_metadata, but that reads from the guest xml doesn't it? | 19:52 |
| mriedem | to correlate the tag with the device or something | 19:52 |
| artom | mriedem, yeah | 19:52 |
| mriedem | :( | 19:52 |
| artom | mriedem, you're basically trying to answer the question "what happens if _build_device_metadata fails?" right? | 19:53 |
| artom | Because the try block it's in only handles libvirtError... | 19:54 |
| mriedem | yeah | 19:54 |
| mriedem | as noted, the compute manager will handle any NovaException that comes out of the driver.attach_interface method | 19:54 |
| mriedem | but that only deallocates the port, which if it's a pre-existing port is an unbind of the host on the port, if nova created the port then nova deletes the port, | 19:55 |
| mriedem | which would trigger a network-vif-deleted event, and nova would get that and detach the interface from the guest, | 19:55 |
| mriedem | but i'm worried about the case the the port was provided to nova to attach to the instance, and we just unbind it, | 19:55 |
| mriedem | i don't think we'll get a network-vif-deleted event from neutron in that case, because it wasn't deleted | 19:55 |
| mriedem | and we wouldn't detach the interface from the guest | 19:55 |
| artom | That raises a question about the semantics of tagged attach, namely, do we fail the whole thing if only the tagging part fails | 19:57 |
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| artom | In situations like this I really miss Java's stricter exception system | 19:59 |
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| mriedem | artom: well, | 20:21 |
| mriedem | if i'm attaching an interface with a tag and the interface shows up in my guest but the tag doesn't, i'm going to wonder wtf happened and create a support ticket, | 20:21 |
| mriedem | so i'm thinking if any of the operation fails, it all needs to fail | 20:21 |
| mriedem | and rollback the attach | 20:21 |
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| artom | mriedem, yeah. If we had a way to communicate partial failure to the user it might have been different, but we don't | 20:32 |
| openstackgerrit | Ed Leafe proposed openstack/nova master: Have scheduler claim resources https://review.openstack.org/463993 | 20:32 |
| openstackgerrit | Ed Leafe proposed openstack/nova master: Make the method to put allocations public https://review.openstack.org/464086 | 20:32 |
| openstackgerrit | Ed Leafe proposed openstack/nova master: Pass a list of instance UUIDs to scheduler https://review.openstack.org/465171 | 20:32 |
| artom | mriedem, I feel like the cleanest would be to catch _build_device_metadata failures in attach_interface and unplug the vif, like we currently do upon libvirtError | 20:33 |
| mriedem | artom: yeah probably, | 20:34 |
| mriedem | then we'll get the network-vif-unplugged event from neutron | 20:34 |
| mriedem | but, i don't think we handle that | 20:35 |
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| mriedem | LOG.warning(_LW('Received unexpected event %(event)s for ' | 20:35 |
| mriedem | 'instance'), | 20:35 |
| mriedem | http://logs.openstack.org/25/465125/1/check/gate-tempest-dsvm-neutron-full-ubuntu-xenial/65c553c/logs/screen-n-cpu.txt.gz?level=WARNING#_May_16_18_05_12_035418 | 20:35 |
| mriedem | we get a lot of those | 20:36 |
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| mriedem | and we don't actually detach from the guest | 20:36 |
| mriedem | artom: really, i don't know why attach_interface just doesn't call detach_interface on failure | 20:37 |
| mriedem | since that handles the things we care about | 20:37 |
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| mriedem | unplugs the vif and detaches the device from the guest | 20:37 |
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| artom | mriedem, for real, vif_driver.unplug ends up going to Neutron? | 20:38 |
| mriedem | artom: it doesn't call neutron directly | 20:38 |
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| mriedem | but the neutron agent is polling for changes, which are introduced via the os-vif unplug | 20:38 |
| mriedem | and the neutron agent notifies the neutron server which sends an event back to nova | 20:38 |
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| mriedem | but as noted, we don't handle network-vif-unplugged | 20:38 |
| artom | Ah... Well, by default I assume code that's there is there for a reason, and works well enough | 20:38 |
| artom | And it was apparently decided by past powers that be that vif_driver.unplug was enough cleanup, so... ;) | 20:39 |
| mriedem | heh yeah idk | 20:39 |
| mriedem | well, | 20:39 |
| mriedem | i guess the thinking was, | 20:39 |
| mriedem | you'd only get that libvirtError if failing to attach the device in the guest failed | 20:39 |
| mriedem | so there would be nothing to detach from the guest, | 20:39 |
| mriedem | that's no longer the case with your change | 20:39 |
| mriedem | b/c we have a new failure domain after the interface is attached into the guest | 20:40 |
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| artom | Aha, smart. | 20:40 |
| artom | And that actually clarified the plug vs attach distinction in my head | 20:40 |
| artom | plug = to the network | 20:40 |
| artom | attach = to the guest | 20:40 |
| mriedem | yeah | 20:41 |
| mriedem | stepping back, what could _build_device_metadata actually fail on besides db/rpc traffic stuff | 20:41 |
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| mriedem | or coding errors | 20:41 |
| artom | I looked through it, I didn't see anything besides what you mentioned. | 20:41 |
| cfriesen | mriedem: do you think there's any point in further pursuing the live migration resource-tracking-numa-xml patches to try and get them merged, or should we give up and wait for jaypipes to fix it with the new placement/allocation code in queens? | 20:42 |
| mriedem | cfriesen: i haven't dug into those, | 20:42 |
| mriedem | but in general i wouldn't count on anything | 20:43 |
| artom | mriedem, I need to run to fetch offsprings from daycare. I'll try to submit a new patchset tonight that detach_interface'es if _build_device_metadata fails | 20:43 |
| mriedem | artom: ok | 20:43 |
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| kashyap | cfriesen: Hey, was travelling today. Just opened IRC & saw your ping (it's late here). | 20:48 |
| kashyap | cfriesen: Is it about the stability of 'cpu-throttle-initial' and 'cpu-throttle-increment'? | 20:49 |
| kashyap | If so, I can't say yet without digging myself, which I could only do tomorrow :-) | 20:49 |
| kashyap | (Unless DanPB has already saw the email thread and responded there) | 20:49 |
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| cfriesen | kashyap: no worries. yeah, that's it. tomorrow's fine, and nobody has responded. :) | 20:52 |
| bauzas | edleafe: not sure I understand why you're still working on my branch ? | 20:55 |
| openstackgerrit | Hongbin Lu proposed openstack/nova master: [WIP] Handle exception on adding secgroup https://review.openstack.org/465173 | 20:55 |
| openstackgerrit | Ed Leafe proposed openstack/nova master: Remove selecting host based on host_subset_size https://review.openstack.org/465174 | 20:55 |
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| bauzas | edleafe: please stop doing that ! | 20:55 |
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| bauzas | I'm just uploading my series, and I'm working on it since yesterday ! | 20:56 |
| bauzas | edleafe: is it because you want your name on the BP ? | 20:56 |
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| edleafe | There was still some interest in my approach. dansmith asked that I change the way that instance UUIDs are passed. | 20:56 |
| edleafe | bauzas: dpm | 20:57 |
| edleafe | ugh | 20:57 |
| edleafe | don't be silly. I don't care about names on BPs | 20:57 |
| bauzas | I'm seriously nerved, because you're duplicating my series | 20:57 |
| dansmith | edleafe: no, I'm not interested in the scheduler approach, I was just saying that if we need to pass the uuids, we should do them as a param | 20:57 |
| dansmith | edleafe: I said if you wanted to re-open the discussion about conductor vs. scheduler you could | 20:57 |
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| edleafe | dansmith: ok, and yes, I do want to re-open, because I think this is much cleaner | 20:58 |
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| dansmith | bauzas: have you replied to any of the feedback on your series? because I don't think I've seen that and so it looks like nothing has happened on that set for quite a while | 20:58 |
| edleafe | dansmith: the code is there and working OMM. | 20:58 |
| dansmith | since before summit or so | 20:58 |
| bauzas | sorry to have a family life, folks | 20:58 |
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| bauzas | if you want to see code, then... | 20:59 |
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| cdent | I reallly think we can do more to move code along in a collaborative fashion | 21:01 |
| cdent | I generally think that if feedback has not had a response for a couple days that code is up for grabs to be fixed. I know that's not a standard that we have formalized, but I wonder if we should. | 21:02 |
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| cdent | This stuff needs to move a lot faster than it is | 21:02 |
| dansmith | agree | 21:02 |
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| edleafe | that's more of a free-for-all than collaboration, though | 21:02 |
| openstackgerrit | Hongbin Lu proposed openstack/nova master: [WIP] Handle exception on adding secgroup https://review.openstack.org/465173 | 21:02 |
| bauzas | cdent: sure, but when you're working on something since 2 days, and then seeing a concurrent patch, do you think your former 2 days were just done ? | 21:02 |
| cdent | bauzas: the way to get around that is to respond to feedback first | 21:02 |
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| dansmith | bauzas: right, it's hard to know someone is working on feedback when there is no response :) | 21:03 |
| cdent | edleafe: I agree there are ways to make it more clean, but in general principle... | 21:03 |
| bauzas | for example, I said to edleafe that I was working on removing host_subset_size and then I see https://review.openstack.org/465174 | 21:03 |
| delete | hi, I am getting this error | 21:03 |
| delete | GlanceConnectionFailed: Connection to glance host 198.23.82.11:9292 failed: Error finding address for https://198.23.82.11:9292/v1/images/detail?is_public=none&limit=20: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:579) | 21:03 |
| delete | glance is using a self-signd certificate | 21:03 |
| edleafe | bauzas: and I told you that I had done it in a subsequent patch | 21:03 |
| bauzas | dansmith: well, I pinged you and edleafe this morning explaining why I wasn't yet uploading my series | 21:03 |
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| dansmith | bauzas: yeah, but I hadn't seen any updates since then.. I guess I missed them | 21:05 |
| delete | nevermind | 21:05 |
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| openstackgerrit | Sylvain Bauza proposed openstack/nova master: Delete existing allocations when retrying https://review.openstack.org/460433 | 21:07 |
| openstackgerrit | Sylvain Bauza proposed openstack/nova master: Don't delete allocation if instance being scheduled https://review.openstack.org/460177 | 21:07 |
| openstackgerrit | Sylvain Bauza proposed openstack/nova master: WIP: Allocate instance by the conductor https://review.openstack.org/460455 | 21:07 |
| openstackgerrit | Sylvain Bauza proposed openstack/nova master: WIP: Scheduler returning more than 1 host https://review.openstack.org/465175 | 21:07 |
| bauzas | dansmith: so ^ | 21:07 |
| dansmith | bauzas: cool, thanks.. I'm assuming edleafe pushed up something that caused a merge conflict? | 21:09 |
| bauzas | FWIW, I'm just adding the RPC API version | 21:10 |
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| efried | dansmith Is there a generic, forward- and backward-compatible way I can tell (in my CI) whether cellsv2 is enabled? | 21:16 |
| efried | Basically, I need to know whether to run that nova-manage command. | 21:16 |
| dansmith | um | 21:16 |
| dansmith | as of ocata it's always enabled | 21:16 |
| dansmith | so, yes? :) | 21:16 |
| efried | But would like to code it in such a way that my CI will work today on pre-ocata, but also into the future. | 21:16 |
| dansmith | your CI doesn't know what release you're on? | 21:18 |
| efried | dansmith Well, yeah, but it's kinda tough to say "greater than or equal to ocata" | 21:18 |
| efried | I mean, that'll work (cause 'master' is >= 'ocata')... until we roll over from z back to a ;-) | 21:19 |
| dansmith | welp... I dunno, maybe pick something you know is in ocata but not in newton that you can key off of? like the presence of cmd/nova-status or something? | 21:19 |
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| efried | Okay. I think we're going to go dumber than that. We're not CIing before newton, so we'll just say "if not newton". Thanks dansmith. | 21:20 |
| dansmith | seems reasonable :) | 21:20 |
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| edleafe | bauzas: dansmith: I have another patch that adds returning multiple hosts to the conductor, but wasn't sure if there was an agreement on a) how to do it and b) how many | 21:32 |
| dansmith | edleafe: should be num_retries or whatever | 21:33 |
| dansmith | well, num_instances * num_retries | 21:33 |
| dansmith | edleafe: there's another wrinkle | 21:33 |
| edleafe | "whatever" :) | 21:33 |
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| dansmith | the hosts we slap into a reqspec to pass down to the cell all have to be ... in that cell | 21:34 |
| dansmith | so I was thinking as a first go, we might just get the normal candidate hosts, and then for each one, ask for n-1 more that are in the same cell, since we can ask the scheduler that already | 21:34 |
| dansmith | (for the same cell I mean) | 21:34 |
| edleafe | so... the scheduler picks a host, and then only returns other hosts that are in the same cell? | 21:35 |
| edleafe | IOW, a post-filter? | 21:35 |
| dansmith | well, we pick num_instances hosts like normal, | 21:37 |
| dansmith | but then for each instance we re-ask for num_retries host in the same cell | 21:37 |
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| edleafe | ok, so check the cell_uuid for each selected host, and only return more hosts with that same cell_uuid | 21:39 |
| dansmith | yeah, we can already ask to limit hosts to a given cell_uuid, | 21:40 |
| dansmith | so I guess we have to look up the host_mapping for that host so we know what cell_uuid to ask for, | 21:40 |
| dansmith | but we have to do that somewhere in that code so we should be able to collapse those (eventually, if nothing else) | 21:40 |
| edleafe | yeah, the order of events was not clear to me | 21:41 |
| dansmith | but clear now? | 21:41 |
| openstackgerrit | Sylvain Bauza proposed openstack/nova master: Scheduler returning more than 1 host https://review.openstack.org/465175 | 21:41 |
| openstackgerrit | Sylvain Bauza proposed openstack/nova master: WIP: Allocate instance by the conductor https://review.openstack.org/460455 | 21:41 |
| dansmith | I haven't looked at bauzas' code from just now, it's possible he's doing some of that | 21:41 |
| bauzas | just updated my change | 21:41 |
| bauzas | edleafe: did that in https://review.openstack.org/465175 given the consensus we had | 21:42 |
| edleafe | dansmith: clear except for the request for a particular cell | 21:42 |
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| bauzas | one of the reasons why it took me a while to upload the series | 21:42 |
| dansmith | edleafe: there's code in the migrate path that demonstrates that, but reqspec.destination.cell can be set, which limits it to that cel | 21:43 |
| dansmith | bauzas: okay cool | 21:43 |
| edleafe | bauzas: ok, thanks. I was looking for getting the cell uuid from the reqspec | 21:43 |
| dansmith | I need to run off for a bit, but I will look over bauzas' patches when I get back | 21:44 |
| edleafe | And was it agreed to return a 2-tuple of (chosen_host, alternative_hosts), or simply a list of hosts, with the first one the chosen one? | 21:44 |
| bauzas | edleafe: don't forget that the scheduler can return more than 1 | 21:45 |
| dansmith | edleafe: we can't really do it all in one query because of the cell restriction I think | 21:45 |
| bauzas | hint : num_instances | 21:45 |
| dansmith | anyway, biab | 21:46 |
| edleafe | bauzas: yeah, of course I get that. We were originally returning a list of single hosts; we could now return a list of lists of hosts | 21:46 |
| dansmith | don't kill each other while I'm gone | 21:46 |
| edleafe | dansmith: you're no fun | 21:47 |
| bauzas | it's 23:47 | 21:47 |
| bauzas | nothing good happens after midnight | 21:47 |
| dansmith | okay fine, do and I'll congratulate the winner when I return | 21:47 |
| melwitt | what bauzas has at https://review.openstack.org/#/c/465175/2/nova/scheduler/filter_scheduler.py@142 is what I was thinking, without doing a second query | 21:47 |
| melwitt | that is, parse the list we get back the first time to pick alternatives in the same cell | 21:47 |
| dansmith | oh because we're getting back more than subset size now | 21:48 |
| melwitt | we always get the whole list I thought (all that pass all filters) | 21:48 |
| edleafe | melwitt: that's correct | 21:48 |
| melwitt | and then the first is picked unless subset size is bigger than 1 | 21:48 |
| dansmith | we return 10k hosts from scheduler to conductor? | 21:48 |
| edleafe | dansmith: no | 21:48 |
| openstackgerrit | Sylvain Bauza proposed openstack/nova master: Scheduler returning alternatives per destination https://review.openstack.org/465175 | 21:49 |
| openstackgerrit | Sylvain Bauza proposed openstack/nova master: WIP: Allocate instance by the conductor https://review.openstack.org/460455 | 21:49 |
| edleafe | we return 10K hosts from placement to scheduler (potentially) | 21:49 |
| bauzas | I stop iterating over the list once we have enough alternatives | 21:49 |
| bauzas | but please see $code | 21:49 |
| dansmith | oh, I see that's happening in scheduler, yeah, okay | 21:49 |
| melwitt | yeah | 21:49 |
| bauzas | seriously, the big problem is not there | 21:49 |
| dansmith | yeah I didn't think about doing that, but that's good | 21:49 |
| bauzas | like I said yesterday in that channel, we stop using iterators | 21:49 |
| melwitt | bauzas: yeah, that's exactly what I hoped to see, stop when have enough instead of doing a list comprehension over all | 21:50 |
| dansmith | I guess I thought we weighted a subset of the hosts, | 21:50 |
| bauzas | so in case we have 10K nodes, then we have a 10K list for filters and a 10K list for weighers | 21:50 |
| dansmith | because on early scheduler runs, we'll be weighing 10k nodes just to pick one | 21:50 |
| bauzas | instead of having iterators | 21:50 |
| bauzas | so it took me 3 hours to see if I was able to quickly fix that | 21:50 |
| bauzas | ie. using iterators for filters and weighers | 21:50 |
| bauzas | looks to me it's possible, but I need more time | 21:51 |
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| dansmith | not sure how you can pick the highest score host without iterating all of them... | 21:51 |
| dansmith | if that's what you mean | 21:51 |
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| bauzas | dansmith: I was thinking of adding a reservoir sampling method for that | 21:52 |
| edleafe | filters have to iterate through all returned hosts. Weighers have to iterate through all filtered hosts | 21:52 |
| dansmith | edleafe: right | 21:53 |
| bauzas | we need to iterate for sure, but we don't need to put it all in memory | 21:53 |
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| dansmith | sure | 21:53 |
| dansmith | anyway, I'll look more at this when I get back | 21:53 |
| bauzas | so, for example, to-be-weighting hosts could be like having an index and a weight so we could just sort based on that | 21:54 |
| bauzas | instead of sorting based on a full memory | 21:54 |
| bauzas | and once we have filtered hosts, we don't really need to keep that in memory | 21:54 |
| bauzas | since for the moment the scheduler can hardly support more than 400 nodes, I think it's not a problem bubbling up | 21:55 |
| bauzas | but if we say for cells v2 that all the nodes will be verified, then I think we should fix that | 21:55 |
| bauzas | and please, don't coufound iterators and lists | 21:56 |
| bauzas | edleafe: oh, and FWIW, the 2-tuple (host, alts) is just for a priv method | 21:57 |
| bauzas | edleafe: select_dests is returning a keyed dict | 21:57 |
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| bauzas | well, a list of keyed dicts rather | 21:57 |
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| edleafe | bauzas: yes, I do believe I've seen that code once or twice :) | 22:03 |
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| edleafe | I was just asking if that implementation was agreed upon at the summit | 22:04 |
| bauzas | we didn't discussed on the interface | 22:05 |
| bauzas | so you could be bikeshedding it :p | 22:05 |
| bauzas | tbc, I think that since _schedule() is private, we shouldn't really care of what we return | 22:06 |
| edleafe | nope, just trying to catch up beyond the etherpad https://etherpad.openstack.org/p/BOS-forum-move-claims-from-compute-to-scheduler | 22:06 |
| bauzas | the crux should be around select_dests() | 22:06 |
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| melwitt | anyone else interested in preventing KeyErrors in exceptions in unit test (creates garbled text to stdout), please review dis: https://review.openstack.org/#/c/411615 | 22:46 |
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| melwitt | woot, thanks | 23:00 |
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| openstackgerrit | melanie witt proposed openstack/nova master: WIP Cache database and message queue connection objects https://review.openstack.org/465042 | 23:07 |
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