Wednesday, 2018-12-12

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witek#startmeeting monasca15:00
openstackMeeting started Wed Dec 12 15:00:47 2018 UTC and is due to finish in 60 minutes.  The chair is witek. Information about MeetBot at http://wiki.debian.org/MeetBot.15:00
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.15:00
*** openstack changes topic to " (Meeting topic: monasca)"15:00
openstackThe meeting name has been set to 'monasca'15:00
witekHello15:00
koji_nhi15:01
witekHi koji_n15:01
dougszhey all15:01
witekhi dougsz15:01
witekhere the agenda for today:15:02
witekhttps://etherpad.openstack.org/p/monasca-team-meeting-agenda15:02
witeknot much really15:02
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witekhi joadavis15:02
witekgood to see you15:02
dougsz+115:03
joadaviso/15:03
witeklet's start15:03
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witek#topic events-listener15:03
*** openstack changes topic to "events-listener (Meeting topic: monasca)"15:03
witekhttps://review.openstack.org/58380315:03
joadavisThanks again for the comments.15:03
witekwe have further discussion on spec15:03
joadavisI'll have to catch up. :)15:04
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witekI'd like to get consensus about how it should work and where should be deployed15:04
witekfirst question is: should it send to Kafka or Monasca API15:05
dougsz+1 for Monasca API - I think it's more flexible and the overhead is tolerable15:06
witekas joadavis has pointed, we could indeed implement both scenarios15:07
witekbut we should start with one :)15:07
joadavisI'd like to do right to Kafka, but if we think we need to be able to separate the collection of events from the control plane (like in nova cells) we should start with API15:07
witek+115:07
joadavisin other words, if API is more flexible we can start there15:08
joadavisSo the next question - collection in an API service instance or collection in an agent instance15:08
witek#agreed first implementation sends events to Monasca API15:08
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dougsz+1 for agent instance, the API might not have network access to RabbitMQ15:10
witekI think it should be a seperate service running next to the agent though15:11
dougszAh yeah sure, that makes sense to me15:11
dougszGood comments about the forwarder not being suitable on the spec15:11
witekI think the new service could be similar ceilometer-agent15:13
witeksimilar to ceilometer-agent15:13
witekjoadavis: what do you think?15:13
joadavisas a separate service/agent, we should be able to keep it pretty light.15:14
witekright15:14
joadavismy only worry is that it will be another thing to install.15:14
joadavisbut we can try to find a way to make it easy to include with a monasca-agent install15:14
witektrue15:15
witekwe could place the code next to collector and forwarder15:15
dougszagreed that in an ideal work it would be nice if it was installed with the monasca-agent15:16
dougszAll the code for fetching the endpoint, and the config file is there as well.15:16
witekthat could work, I guess15:17
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witekOK, let's put it in monasca-agent repo then and extend the existing config and monasca_setup script15:19
joadavisshould be good to have with monasca-agent.  I'll have to do a little digging to see what options we have there15:19
dougszSounds good to me :)15:20
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witekand in case we want to collect metrics in a different way, we can still stop/disable collector forwarder services15:21
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dougszMy first thought is a forwarder which buffered to disk for events could help avoid rabbit filling the RAM if the notifications pile up, but I think that is probably overkill at the moment.15:22
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witekI think RabbitMQ can handle it better anyway15:22
joadavisWould RabbitMQ hang on to the notifications indefinitely?  I don't think that other services that consume the notifications have that concern currently.15:23
dougszCan it drop notifications if the RAM fills up or do you mean a separate instance for notifications?15:23
joadaviswe can check against how Vitrage or others handle it15:23
witekjoadavis: that would be good15:24
dougszjoadavis: good question15:24
joadavisI would hope it could drop old notifications if they aren't consumed, but I think it depends on the type of listener you are using with Rabbit15:24
dougszJust thinking about if the events API went down, how we would avoid RAM filling up.15:25
joadavisEvents should be a lower amount of traffic. so either our monasca component listening to events would have to be down for a long time or there would have to be a large storm of events while the listener was down to run in to space issues15:26
joadaviswe could do some buffering in our events listener agent and drop old messages as needed15:27
joadavissimilar to what the forwarder does when it requeues messages when the api is down15:27
witeklet's check it, and we can then build in such logic, if needed15:28
dougszSounds like a plan to me. Hopefully the concern is unfounded.15:28
joadavis:)15:28
witek:)15:28
witekcool, seems that we have a clearer view how the component should look like now15:29
dougszLooking forward to deploying it :)15:29
joadavisI'll rewrite the spec to match. :)15:30
witekgreat, thanks joadavis15:30
dougszthanks joadavis15:30
witekhope to merge it before Christmas :)15:30
dougszyep15:31
witek#topic additional meeting time for Asia/Australia15:31
*** openstack changes topic to "additional meeting time for Asia/Australia (Meeting topic: monasca)"15:31
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witekI have attended the self-healing SIG last week15:32
witekthey host two team meetings for different time zones15:32
witekbasically, everyone can choose, which one to attend15:32
witekthe current meeting time is very inconvenient for Japan/China/Australia15:33
dougszI think it would be good to try - if we have lots of people turn up for the new meeting, that could only be a good thing.15:34
joadavismight be worth it even if we just got 2 new contributors.  Have you had any interest in the past?15:34
witekyes, people Tacker project for example15:35
witekIndia/Japan15:35
witekI see some reviews from China15:36
witekI think we can give a try15:36
joadavisdo you have a time slot in mind?15:36
witekthough about Thursday morning UTC time15:36
witekmiddle of the night for you :)15:37
joadavisI can read the logs later. :)15:37
witekno, I really don't expect anyone apart from me to attend twice15:38
witekOK, I'll set up the slot and send an email to the list15:39
dougszThe time is good me, so I can try and log in at least15:39
witekthanks dougsz15:40
witek#topic AOB15:40
*** openstack changes topic to "AOB (Meeting topic: monasca)"15:40
witektempest tests are currently blocked on influxdb client error15:40
witekhttps://review.openstack.org/62433415:40
witekI hope requirements team will merge it soon15:41
witekI also have problems installing DB schema with Alembic on Python 315:42
witekhttps://review.openstack.org/62236115:42
witekthe tests fail randomly15:42
witekwith pymysql.err.IntegrityError: (1215, 'Cannot add foreign key constraint')15:43
dougszHas anyone else reproduced Adrian's error in devstack?15:44
witekyes, you can observe it in OpenStack CI15:44
witekno, sorry15:45
witekbug reported by Adrian was fixed in your change15:45
witekany other topics?15:47
dougszI gathered more feedback on cells deployments15:48
witekOK, please share15:48
joadavisI had a bug passed to me yesterday related to the monasca-installer. I'm going to ask Dobek about it, but I'll cc you witek15:48
dougszNothing from Cern yet, but Rackspace were using Yaggi to collect notifications to a central repo.15:48
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witekhttps://github.com/rackerlabs/yagi15:49
joadavisI would think most cells users would want to centralize the notifications. but if the documented architecture doesn't require it we might have to support them being separate15:49
dougszI suppose now that we have decided to post events to the API, it doesn't matter if you leave them in a cell, or tell oslo to ship them to a central repo.15:50
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witeklast commit 2 year ago15:51
dougszAgreed joadavis, best practice seems to be to use a central notificiation repo15:52
dougszyeah - it is abandoned - it seems just configuring oslo is the simplest way of collecting them all in one place.15:53
witekthanks dougsz15:53
joadavis+115:53
dougsznp - only one data point so far :)15:53
witekOK, thanks everyone for today15:54
witekthanks for constructive discussion15:54
koji_nwitek: when will the meeting for asian time zone start?15:54
dougszthanks all15:55
witekkoji_n: I'll send a message to the openstack-discuss mailing list15:55
witeknext week?15:55
koji_nok, thx!15:55
witekthanks, bye bye15:55
witek#endmeeting15:55
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/"15:55
openstackMeeting ended Wed Dec 12 15:55:57 2018 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)15:55
openstackMinutes:        http://eavesdrop.openstack.org/meetings/monasca/2018/monasca.2018-12-12-15.00.html15:56
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/monasca/2018/monasca.2018-12-12-15.00.txt15:56
joadavisbye15:56
openstackLog:            http://eavesdrop.openstack.org/meetings/monasca/2018/monasca.2018-12-12-15.00.log.html15:56
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