Tuesday, 2016-11-22

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AlagarIam trying to integrate openstack with xen03:13
Alagari have installed openstack using devstack script top of xen hypervisor, in this open stack as a virtual machine.03:13
Alagarwhen i create instance in openstack,   the instance should create in xen hypervisor.  but its not happening.03:13
AlagarSome one could you please guide me please03:13
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tdurakov#startmeeting Nova Live Migration14:00
openstackMeeting started Tue Nov 22 14:00:25 2016 UTC and is due to finish in 60 minutes.  The chair is tdurakov. Information about MeetBot at http://wiki.debian.org/MeetBot.14:00
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.14:00
*** openstack changes topic to " (Meeting topic: Nova Live Migration)"14:00
openstackThe meeting name has been set to 'nova_live_migration'14:00
tdurakovhello everyone14:00
tdurakov#link agenda https://wiki.openstack.org/wiki/Meetings/NovaLiveMigration14:00
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markus_zo/14:01
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tdurakovhm14:01
tdurakovonly me and markus_z O_o14:01
pkoniszewskio/14:01
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markus_zwhoop whoop, three's a party :)14:02
davidgiluko/14:02
tdurakovlast week there were only 3:(14:02
tdurakovso now it's 4)14:02
* kashyap waves14:02
tdurakovok, let's start14:02
tdurakov#topic ci14:02
*** openstack changes topic to "ci (Meeting topic: Nova Live Migration)"14:02
tdurakovI think grenade and ceph bits are stuck on tempest part14:03
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pkoniszewskithat's right14:03
tdurakovhttps://review.openstack.org/#/c/379638/14:03
tdurakovhttps://review.openstack.org/#/c/389767/14:03
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tdurakovtried to catch JordanP last week, no results14:04
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tdurakovsend a message for #openstack-qa with review request14:05
wznoinsklate hi14:06
tdurakovpkoniszewski: any updates on stats for post-copy testing?14:06
* tdurakov trying to make predictable mem load on instance - work in progress14:06
pkoniszewskinone yet, i was burried in reviewing serial console and claims patches14:07
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pkoniszewskii'm still a bit14:07
tdurakovok14:07
tdurakovlet's go next topic14:07
tdurakov#topic bugs14:07
*** openstack changes topic to "bugs (Meeting topic: Nova Live Migration)"14:07
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tdurakovso, let's discuss that patches for serial-console and life migration14:07
markus_zI wanted to ask here for a general direction on that patches.14:08
markus_zFor context: https://bugs.launchpad.net/nova/+bug/145525214:08
openstackLaunchpad bug 1455252 in OpenStack Compute (nova) "enabling serial console breaks live migration" [High,In progress] - Assigned to sahid (sahid-ferdjaoui)14:08
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markus_zI took over from sahid on that series and discussed it yesterday with dansmith.14:08
markus_zLet me get the reference to that, one moment14:09
markus_zhttp://eavesdrop.openstack.org/irclogs/%23openstack-nova/%23openstack-nova.2016-11-21.log.html#t2016-11-21T15:10:1514:09
tdurakovhttps://review.openstack.org/#/c/397276/ -is that fix?14:09
markus_z^ is one of the preparation patches. The actual fix is https://review.openstack.org/#/c/275801/14:10
markus_zI'm rebasing that after this meeting.14:10
pkoniszewskiwe are almost there, I think14:11
pkoniszewskithere is one change that I don't like in those patches14:11
tdurakovmarkus_z: I'm ok with None too14:11
pkoniszewskiI mean this check move14:11
pkoniszewskithis is completely unreleated to the fix14:11
markus_zOK, cool, that's the two major hurdles at the moment.14:11
markus_zI got it and change them accordingly.14:11
pkoniszewskii'm fine with everything else and I agree with Dan's point14:12
markus_zAnything else which would make the reviews easier?14:12
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tdurakovhold on14:13
tdurakovhttps://review.openstack.org/#/c/398389/2/nova/virt/libvirt/migration.py - won't this raise obj_attr unset?14:13
pkoniszewskican't find anything else14:14
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pkoniszewskitdurakov: according to Dan's comment I don't think we still need this change in current form14:14
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markus_ztdurakov: yes it would. I already reverted that but didn't yet push it. It will be in ps3.14:14
pkoniszewskiI mean, we still need to have a guard there14:14
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pkoniszewskigreat! :)14:14
tdurakovok)14:15
markus_zPlease be aware that tempest isn't yet capable of testing the serial console with live-migration. That's done with: https://review.openstack.org/#/c/346815/14:15
markus_zTo be precise, this one in Nova does the prep step: https://review.openstack.org/#/c/347471/14:16
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markus_zJust to be sure to give the full context here.14:16
tdurakovmarkus_z: I could update hook14:17
markus_ztdurakov: That would be nice, thanks :)14:17
tdurakovso, if it works, we could depends on that14:17
tdurakovagain not sure tempest tests to be merged soon14:18
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tdurakovmaybe it will be easier to create tempest plugin for live-migration14:18
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tdurakovanything else on that?14:19
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markus_zFor testing, right now I use https://github.com/markuszoeller/openstack/tree/master/scripts/vagrant/live-migration-U1404-VB like the savage I am. :)14:19
markus_zNo, that's all on that, thanks for your time.14:19
tdurakov:)14:19
tdurakovlet's move on14:20
tdurakov#topic specs14:20
*** openstack changes topic to "specs (Meeting topic: Nova Live Migration)"14:20
tdurakovjohnthetubaguy: are you arounds?14:20
tdurakovs/around14:20
johnthetubaguyI am14:20
pkoniszewskiare we past spec freeze already?14:20
johnthetubaguyyes, it was last week, thursday14:20
tdurakovbut there still specs unmerged14:20
tdurakovso14:20
tdurakovhttps://review.openstack.org/#/c/347161/14:21
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tdurakovI'm fine with that one, except I do not wont checks to be made in sync manner14:21
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tdurakovjohnthetubaguy: could you please take a look once again14:22
johnthetubaguyI thought the problem with that, was the issue around recreating the libvirt xml?14:22
johnthetubaguyFWIW, it seems worth adding that quick RPC call to get capabilities.14:23
johnthetubaguyI know we don't want RPC calls in the API, but at least it should be a quick thing to process14:24
tdurakovwhat's the difference with other l-m pre-checks here?14:24
johnthetubaguythey had to call out to cinder and things, and it was two sets of RPC calls14:24
tdurakovwhy not to get this check too over migration status and instance-actions14:24
johnthetubaguythey took time14:24
johnthetubaguyI think its a fine line, but if we can fail early, every reliably, that doesn't seem so bad14:25
johnthetubaguyits only needed if the VM is in Rescue state14:25
tdurakovbtw, is there plan to store that data on the the api side in db?14:25
johnthetubaguyunless we check if live-migrate is support at all, I guess, which I guess we should14:25
johnthetubaguyprobably never, that would be a child DB thing if it did happen14:26
johnthetubaguyat least in my head14:26
tdurakovokay, still against that, but looks like I'm in minority on that question14:26
johnthetubaguyso the key bit, for me, is the API experience14:27
tdurakovif we do rpc.call, let's do it direct to compute14:27
tdurakovwithout extra hop to conductor14:27
johnthetubaguyright, thats what we are asking, direct RPC call to compute14:27
johnthetubaguyanyways, the key bit is the API sematics14:28
johnthetubaguythe implementation can change over time14:28
tdurakovok, will re-review that soon14:28
tdurakovjohnthetubaguy: thanks14:29
tdurakovlet's go next14:29
tdurakov#topic Open discussion14:30
*** openstack changes topic to "Open discussion (Meeting topic: Nova Live Migration)"14:30
tdurakovdo we have anything?14:30
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siva_krishHi All! I am trying to reproduce this bug https://bugs.launchpad.net/nova/+bug/1605016. Would someone be able to help me with that ?14:31
openstackLaunchpad bug 1605016 in OpenStack Compute (nova) "Post copy live migration interrupts network connectivity" [High,Confirmed] - Assigned to Sarafraj Singh (sarafraj-singh)14:31
pkoniszewskisiva_krish: sure14:31
pkoniszewskisiva_krish: the easiest way would be to have environment with DVR14:32
pkoniszewskias it appears only in certain neutron configurations14:32
tdurakovright14:32
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siva_krishI tried reproducing it with DVR setup only but I wasn't able to reproduce it14:32
siva_krishpkoniszewski: ^14:33
tdurakovsiva_krish: how are you detecting network failure?14:33
kashyapsiva_krish: The reproducer of it is non-trivial14:34
kashyapAs you might've noticed the description from Matt Booth, there14:34
siva_krishtdurakov: by pinging the VM from outside the network and also ran stress command on VM beofr migrating14:34
tdurakovsiva_krish: hm, are you sure that migration is switched to post-copy?14:35
siva_krishtdurakov: I changed to configuration  to use post copy in nova.conf. Is there any other way to check it ?14:36
davidgiluksiva_krish: Make sure the guest is running something heavy that wont migrate with precopy14:36
pkoniszewskidid you just wait or did you use force-complete API?14:37
davidgiluksiva_krish: e.g. stressapptest hammering memory14:37
siva_krishpkoniszewski:  I didn't use force-complete14:38
tdurakovsiva_krish: that's the point14:38
mdboothprecopy is pretty much irrelevant here in practice. You should see packet loss/interruption to a degree in any case.14:38
tdurakovyou need to raise stress level on vm14:38
mdboothRaising stress level is only required to trigger post-copy in the first place14:38
mdboothHowever, post-copy is subsequently fast enough that you're unlikely to notice the additional network switchover delay due to post-copy14:39
siva_krishmdbooth: tdurakov will trying doing that and let you know what happened14:39
mdboothI found that the easiest way to test it was to introduce an artificial delay in the code.14:40
siva_krishdavidgiluk: will try that out14:40
mdboothAlso, frig the code to switch to post-copy mode immediately14:40
mdboothThen it doesn't require stress in the guest14:40
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tdurakovanything else?14:42
pkoniszewskihmm, i think it still does require14:42
pkoniszewskiwe don't know when LM will be switched to post copy, do we?14:43
pkoniszewskidavidgiluk: can QEMU switch LM to post-copy in the middle of particular iteration?14:43
pkoniszewskior does it wait till the end of iteration and then starts post-copy in subsequent iteration?14:44
davidgilukpkoniszewski: That...depends14:44
mdboothpkoniszewski: Yep, because we do the switch14:44
pkoniszewskimdbooth: but it's still async...14:44
mdboothpkoniszewski: Nope14:44
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davidgilukpkoniszewski: It only checks at certain points, if you've set a bandwidth limit I think it'll probably notice before the end of an iteration but no guarantee14:44
mdboothNova triggers it explicitly14:44
mdboothAnd waits14:45
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johnthetubaguysounds like load in the VM, and making the code trigger it straight away would help?14:45
davidgilukyeh, guest load is dead easy anyway14:45
tdurakovmdbooth: nova scheduled it, no?14:45
pkoniszewskiyeah, nova just schedules it14:45
siva_krishmdbooth: Sorry had a internet connection issue.14:45
tdurakovsiva_krish: the resolution is the same, good load level:)14:46
siva_krishtdurakov: mdbooth will try your suggestions14:46
pkoniszewskiand switch to post-copy explicitly14:46
johnthetubaguysiva_krish: we have folks trying to simulate load in the ops/qa team right now, that can probably share that with you14:46
johnthetubaguyyeah, and somehow trigger post-copy14:46
johnthetubaguyAPI call, or via changing the code a bit14:47
tdurakovlive-migration-force-complete14:47
siva_krishjohnthetubaguy: that might be helpful as well14:47
mdboothNova triggers the switch to post-copy explicitly in the _live_migration_monitor loop14:47
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mdboothThe issue is that it doesn't do network switchover until that loop completes14:48
mdboothLM is really a red herring here14:48
mdboothThe bug is the design of the loop14:48
mdboothIt's not worth spending a lot of time on a complicated setup to trigger a long post-copy14:48
mdboothBecause post-copy isn't what's causing the issue14:48
johnthetubaguyso the fix can be done in parallel, I would say14:48
mdboothIt's what Nova does when post-copy happens which is the issue14:49
mdbooth(and it's not a big issue)14:49
siva_krishmdbooth: johnthetubaguy will start working on the fix.14:50
siva_krish^ thanks for all of your info/suggestions on this bug14:54
tdurakovthanks everyone for joining14:55
tdurakov#endmeeting14:55
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings"14:55
openstackMeeting ended Tue Nov 22 14:55:28 2016 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)14:55
openstackMinutes:        http://eavesdrop.openstack.org/meetings/nova_live_migration/2016/nova_live_migration.2016-11-22-14.00.html14:55
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/nova_live_migration/2016/nova_live_migration.2016-11-22-14.00.txt14:55
openstackLog:            http://eavesdrop.openstack.org/meetings/nova_live_migration/2016/nova_live_migration.2016-11-22-14.00.log.html14:55
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sambettsNetworking-cisco meeting time16:05
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sambetts#startmeeting networking_cisco16:06
openstackMeeting started Tue Nov 22 16:06:50 2016 UTC and is due to finish in 60 minutes.  The chair is sambetts. Information about MeetBot at http://wiki.debian.org/MeetBot.16:06
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.16:06
*** openstack changes topic to " (Meeting topic: networking_cisco)"16:06
openstackThe meeting name has been set to 'networking_cisco'16:06
sambettsAs normal agenda is avaiable here: https://wiki.openstack.org/wiki/Meetings/networking-cisco]#16:07
sambettsAs normal agenda is avaiable here: https://wiki.openstack.org/wiki/Meetings/networking-cisco16:07
sambetts#topic Roll call16:07
*** openstack changes topic to "Roll call (Meeting topic: networking_cisco)"16:07
bradjoneso/16:07
sambettso/16:07
robcresswello/16:07
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* tbachman is here now16:09
cabouchacaboucha o/16:09
sambettsanyone else? bobmel?16:09
bobmelsambetts: Hi, here16:09
sambettscool, moving on16:10
sambetts#topic Announcements16:10
*** openstack changes topic to "Announcements (Meeting topic: networking_cisco)"16:10
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sambetts#info It appears that the RDO maintainers are trying to CI networking-cisco in master OpenStack16:11
sambettsanyone got anything else?16:11
sambettsok moving on16:13
sambetts#topic Compatibility shim work16:13
*** openstack changes topic to "Compatibility shim work (Meeting topic: networking_cisco)"16:13
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sambettsSo more things are being moved from neutron to neutron_lib in the Ocata cycle, so we need to start handling more variables/constants etc in our backward compatibility layer16:14
bobmelsambetts: I have this patch: https://review.openstack.org/39955216:15
bobmelwhere I'm trying to fix a bunch of those issues16:15
sambettsYup :) thats definatly a great start16:15
bobmelBut it's not so easy, one thing after the other breaking16:16
sambettsSo as more things get added I wanted to use this topic to address some of the structural design of the compatiblity layer16:16
bobmelBut I'm getting closer16:16
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sambettsright now we're using the backwards_compatiblity module to handle all of this, but I'd like to move away from having a single big bloated file16:17
bradjones+116:17
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sambettsI'd much rather we went down the path of having modules like networking-cisco.constants that handles constants and a networking-cisco.attributes for handling attributes16:18
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sambettsthis makes it transparent from the drivers/plugins perspectives that there is a compatiblity layer in place16:19
bradjonesI think that's fine, I think we may want to break stuff down to ml2 and non-ml2 too maybe?16:20
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sambettsthe basic design I'm thinking is if we can build the compat stuff into our existing modules instead of being so explicit about it16:24
bobmelin the 399552 I bring all neutron.common.constants and neutron_lib.constants into backwards_compatibility.constants16:25
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bobmelBut the same thing could be done so that the constants instead go into neutron_cisco.constants16:26
sambettsbobmel: yeah, I would prefer if that was simply networking-cisco.constants16:26
sambettsbobmel: and then I also want to try (over time of course) to move the networking-cisco specific constants dotted around networking-cisco into that module too16:28
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cabouchasambetts: Departing for other meeting16:29
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sambettsok o/ caboucha16:29
bobmelSomething that add complexity is that we're not having releases so in mitaka some of it is in neutron.common.constants and in newton some of that has moved to neutrn_lib16:29
sambettsright thats what we handle in our compatiblity layer16:30
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bobmelYes, but implementing the compatibility layer itself is the crux. At least that is what my experience in 399552 :-)16:31
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sambettsright, but that pain is  something we decided to absorb to because its outweighed by what we gain being compatible with multiple versions16:34
sambetts#topic Stable Ocata (master) compatibility16:36
*** openstack changes topic to "Stable Ocata (master) compatibility (Meeting topic: networking_cisco)"16:36
sambettsSo how is that patch going bobmel? It looks quite complete, do you need any help other than reviews?16:37
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bobmelsambetts: No, don't think so. But reviews will be good. But it is not yet passing master and newton16:43
bobmelBut fairly close16:43
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sambettsbobmel: awesome :) I'll try to review it again soon16:44
sambetts#topic CI Status16:45
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sambetts#info CI is still down because of lab issues, continuing to investigate16:46
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sambetts#topic Sub/Driver team feedback16:47
*** openstack changes topic to "Sub/Driver team feedback (Meeting topic: networking_cisco)"16:47
sambettsAny updates from the driver teams?16:48
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sambettsbobmel: I believe the asr patches are a high priority now?16:49
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* tbachman wonders if sambetts is looking at tbachman for this ;)16:54
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sambettsthis https://review.openstack.org/#/c/399228/ patch is the one I was wondering if we needed to push for reviews on16:57
sambettsis it ready to go? and which patches do we want to land before we cut 4.1.0?16:58
bobmelsambetts: sorry for the delay, yes I think ASR is the prio now, both for ACI and standalone (i.e., without ACI)16:59
bobmelsambetts: But might be good to check with Leon/Brian too17:00
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tbachmansambetts: I’ll have a look at that patch today17:00
sambettsok thanks17:00
sambettswe're out of time17:01
sambettsthanks for coming guys17:01
sambetts#endmeeting17:01
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings"17:01
openstackMeeting ended Tue Nov 22 17:01:10 2016 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)17:01
openstackMinutes:        http://eavesdrop.openstack.org/meetings/networking_cisco/2016/networking_cisco.2016-11-22-16.06.html17:01
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/networking_cisco/2016/networking_cisco.2016-11-22-16.06.txt17:01
openstackLog:            http://eavesdrop.openstack.org/meetings/networking_cisco/2016/networking_cisco.2016-11-22-16.06.log.html17:01
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