Monday, 2014-11-17

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ehaselwanterj^2 cool thing. how far away are we from juno/ubuntu-14.04 or juno/centos-7.008:51
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openstackgerritJens Rosenboom proposed stackforge/cookbook-openstack-integration-test: add a Rakefile to structure test runs  https://review.openstack.org/13490210:58
openstackgerritJens Rosenboom proposed stackforge/cookbook-openstack-integration-test: add a Rakefile to structure test runs  https://review.openstack.org/13490211:08
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openstackgerritJens Rosenboom proposed stackforge/cookbook-openstack-dashboard: Split out the dashboard related part into its own recipe  https://review.openstack.org/13493313:35
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j^2ehaselwanter: not sure what you mean....14:31
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ehaselwanterj^2 well, last time I tried (last week) there were issues with apache and rabbit ..15:02
ehaselwanterj^2 https://blueprints.launchpad.net/openstack-chef/+spec/trusty-juno15:03
ehaselwanterand out of the blue I guessed that centos 7 (major release bump) is in a comparable state ;-)15:04
j^2ohhh ok, so yeah. with 14.04 when we update to chef-client 12 “most” of the issues should be gone15:12
j^2centos7..not sure yet, i don’t think anyone has taken that mantel yet to start testing15:13
j^2https://plus.google.com/hangouts/_/hoaevent/AP36tYcTntVdSOdArupqwlhLi-VZkAbd8b3ufIdYRgR2txebmm7wmA?authuser=0&hl=en15:16
j^2that’s the status meeting link ^^^15:16
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j^2markvan: :(15:32
j^2os-chef-bot: !start-meeting15:36
j^2os-chef-bot: !meeting-start15:36
os-chef-bot************************************************ Meeting is starting ************************************************15:36
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openstackgerritMerged stackforge/cookbook-openstack-integration-test: add a Rakefile to structure test runs  https://review.openstack.org/13490216:05
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j^2https://github.com/jjasghar/chef-openstack-testing-swift16:11
j^2os-chef-bot: !meeting-end16:15
os-chef-bot************************************************ Meeting has ended ************************************************16:15
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openstackgerritMerged stackforge/cookbook-openstack-dashboard: Add volume_api_version for dashboard configurations  https://review.openstack.org/13469516:15
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jmicklej^2: how good are you with the openstack architecture?17:16
libsysguy1jmickle: j^2 is a wizard in all things openstack17:17
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jmickle;-)17:17
jmickleneed some clarification around using NFS for hypervisors17:18
jmickleto store instances17:18
jmickleI am seeing some performance degradation17:18
libsysguyyeah I was about to ask that17:18
jmickleand wondering if its related to storing the instances on the NFS17:18
jmicklebut i need to know why that would happen17:18
jmicklepeople around here keep arguing that the instances are in memory17:18
jmicklebut i suppose thats only true if these are ephemeral root devices right?17:19
libsysguydoesn't NFS do some weird locking17:19
jmickleis it true that the instance image is still writing to the hypervisor volume17:19
jmickleeven when i am not physically writing the instance’s disks?17:20
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libsysguyI think a lot of that depends on how you have NFS configured17:22
libsysguybut I am not too familiar with that style setup with openstack17:23
j^2jmickle: yeah nfs storing the instances can’t be good17:28
j^2do you have one nfs mount for everything?17:28
j^2or is it split up?17:28
j^2and don’t forget nfs is the “lowest” priority when it comes to networking traffic17:28
j^2so it’ll be the first place you see degreation17:29
j^2iirc17:29
jmickleyeah its 1 nfs mount i hate it17:30
jmicklebut i need to prove its bad17:30
jmickleso we can get rid of it17:30
jmicklewould it be true that the image is constantly writing to the volume?17:31
j^2yeah it’s basiclly a stampeading heard problem, every one of your machines is hitting taht mount with _any_ change to the diff file that lays on top of the base image17:31
j^2jmickle: exactly17:31
jmickleso even if its a memory based write on the instance17:32
jmickleis still a write to the diff ?17:32
jmicklewhich results in an upstream write17:32
jmicklecorrect?17:32
j^2i’m pretty sure it does17:32
jmicklethats what i was thinking as well17:32
jmicklebut people making me second guess17:33
j^2it’s in “memory” but it has to have state stored someplace17:33
jmicklei think thats just how virtualization works right17:33
j^2yep17:33
jmicklecause i think xen does the same17:33
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j^2:D17:36
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jmicklej^2: do you know where i can find some documentation17:44
jmickleto support this?17:44
jmicklecause I have to prove this round here17:44
j^2that’s a great question17:44
j^2i’ll have to search around17:45
jmickleim drawing a blank on google terms for this17:45
jmicklehaha17:45
jmicklecause its not an openstack thing17:45
jmickleits more of a virtualization thing17:45
jmickleright17:45
j^2yep17:45
j^2it’s how the underlying hypervisor would handle this stuff17:45
j^2“state of vms on the hypervisor?"17:45
j^2maybe something like that17:46
jmicklegood idea let me try17:46
jmicklesorry for the lame question17:46
j^2no worries, i’m glad to help :)17:46
jmicklegosh google is just littered17:47
jmicklewith vmware crap17:47
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jmicklej^2: what type of virtualization are we working in? My assumption this is para-virtualization right17:51
jmicklemaybe easier if i look at the specs for that type17:51
j^2yeah, i’d double check the code17:51
jmickleoh man i dont even know where to start looking for that one do you think pulling open the nova-compute would be the start?17:52
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jmicklej^2: any idea what the major difference between PV and KVM would be? or is KVM still PV?18:01
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j^2opps sorry been in standus18:01
jmickleno worries18:01
jmickleyeah looks like KVM is still PV18:03
j^2that rings a bell18:04
jmicklehttps://github.com/openstack/nova/blob/master/nova/compute/vm_mode.py18:04
j^2but honestly, i’m not horribly well versed here18:04
jmickleno worries i appreciate the help18:04
jmickleim not either it just helps to talk to someone about it18:04
jmicklehaha18:04
jmicklesorry18:04
j^2:D18:05
j^2hell i rubber duck people all the damn time18:05
jmicklehahaha18:07
jmicklehttp://www.linux-kvm.org/page/Memory18:07
jmickleactually im incorrect18:10
jmickleXen is para-virtualization18:10
jmickleKVM is full18:10
j^2Ah I think we default to KVM too18:10
jmickleyeah18:10
jmickleso with full the hardware has to support virtualization18:11
jmickleand is presented as physical hardware18:11
j^2But its completely in memory then, state isn't stored?18:11
j^2That doesn't seem correct18:11
jmicklenot sure yet18:11
jmicklehttp://www.linuxnix.com/2013/02/what-is-kvm-virtualization-in-linux.html18:12
jmicklenot sure how accurate this is18:12
j^2Hmmm ok18:12
j^2:-/18:13
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jmicklei think states still do exist18:13
j^2It has to. I know when I take down a hypervisor the guest box comes back up in the state I left it. Angry but in the same start18:16
j^2State*18:17
jmickleyeah18:17
jmicklehmm kvm has an irc channel18:17
jmicklelet me ping them18:17
j^2Kk18:17
jmicklethis is an interesting problem18:17
jmicklereally good for knowledge18:17
j^2Totally18:17
jmickleof course i know nobody in that chanell and its quiet18:19
jmicklehaha18:19
j^2Heh18:19
jmicklechannel*18:20
jmickleone day il learn to type18:20
j^2meh, typing is over rated18:23
jmicklehaha18:23
jmickleso they are saying its based on the backing file format18:25
jmickleraw doesnt update states18:25
jmicklebut qcow2 does18:25
j^2and qcow2 is default18:26
jmickleyep18:26
j^2that should be your proof :)18:26
jmicklehahaha18:26
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j^2os-chef-bot: !status-meeting18:34
os-chef-botOur hangout (live) status meeting are at 15:30 GMT 10:30 EST 07:30 PST on Mondays and we post the links to the Google Group: https://groups.google.com/forum/#!forum/opscode-chef-openstack18:34
j^2os-chef-bot: !irc-meeting18:34
os-chef-botOur IRC status meeting/office hours are at 15:30 GMT 10:30 EST 07:30 PST on Fridays we try to have as many core members here so we can discuss topics or issues users are having18:34
j^2:D18:35
jmicklej^2: thanks again18:35
jmicklegot lots of info18:35
jmickle;-)18:35
j^2:D18:35
j^2sweet18:35
jmicklereally good stuff18:35
j^2could you write up a blurb about what you found?18:35
j^2i’d love to read it18:35
jmickleabsolutely18:35
jmicklewell im going to go back now and use vmstat to monitor it18:35
j^2more knowalage is always helpful :)18:35
jmickleto get some hardline metrics around it18:35
jmicklethat way i have a decent article for it18:35
jmickleil blog it and share18:35
jmickle;-)18:36
j^2rock on thanks!18:36
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openstackgerritMark Vanderwiel proposed stackforge/openstack-chef-repo: Fix object storage recipe names  https://review.openstack.org/13505419:10
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j^2anyone got some cycles to help out a poor engineer trying to fix a test? :)20:16
j^2https://review.openstack.org/#/c/134668/20:16
j^2i cant figure it out for the life of me20:17
markvanj^2: isn't that just a simple update to the other spec: api-metadata-redhat_spec.rb:20 for the service name?20:21
j^2i thought so20:21
j^2but i cant seem to get it to pass20:21
j^2or am i crazy?20:21
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markvanhumm, maybe push up your latest changes and then I can grab it an take a look.20:23
markvanI think it's this line: https://github.com/stackforge/cookbook-openstack-compute/blob/master/spec/api-metadata-redhat_spec.rb#L21  and probably 1720:23
j^2yeah those are it’s updated. and yeah i tried changing taht and it didnt like it at all20:24
j^2i thought that was the easy answer but it wasnt :(20:24
j^2maybe i’ve been staring at it too long i dunno20:24
markvanyeah the output from spec errors can be vague, sometimes pointing to wrong spot20:26
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markvanj^2:  worked for me.   Used the following:       expect(chef_run).to enable_service 'nova-api-metadata'20:37
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j^2:-O20:37
j^2i swear i tried taht20:37
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markvanname of source is different from name of service.   I usually don't like that (-1 time) unless there's a good reason.20:38
j^2let me try again i guess20:38
markvan/source/resource/20:38
j^2ah20:38
j^2hey i’m just updating it ;)20:38
markvanIn this case, the service name comes from an attribute, so it's ok to have them be different.20:39
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markvanbtw, did you get a chance to look at the ec2 part of this?   (our repo does not even have the ec2 stuff, so I did not try that yet.)20:39
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j^2yeah it semes it’s not “required”?20:42
j^2or at least i didn’t have have to touch it20:42
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j^2one last test, and i think you’re right markvan :)20:51
markvanyeah, if you do a "service --status-all"  you should see what the name of the ec2 service is, and update it accordingly.20:52
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openstackgerritJJ Asghar proposed stackforge/cookbook-openstack-compute: Updated to start metadata-api  https://review.openstack.org/13466820:57
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openstackgerritJJ Asghar proposed stackforge/cookbook-openstack-compute: Updated to start metadata-api  https://review.openstack.org/13466921:04
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j^2markvan: ok, spinning up my cluster again gonna take a look21:28
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j^2os-chef-bot: ping23:50
os-chef-botPONG23:50
j^2os-chef-bot: ambush markvan: this should have a time stamp here now —>23:54
os-chef-botAmbush prepared23:54

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