Wednesday, 2015-02-04

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zerdaHello. How do I disallow ephemeral storage completely in Icehouse? I mean, is there a way easier than patching horizon/nova?14:45
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j05hzerda: no hard drives14:49
j05hsorry…woke on the wrong side of the snark this morning.14:50
mfischThe openstack naming choices are all pretty cool14:53
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mfischI just wish Lizard was "Lizard King"14:53
zerdaj05h, that's ok. Actually, I'd like not to distract end users with possibility to use that, not just forbid ephemeral storage completely14:54
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j05hzerda: why no ephemeral?14:59
j05h(i like ephemeral :D)14:59
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zerdaj05h, well, we have Cinder based on some SAN, and compute hosts really have no disks (only USB drives as root devices), and I want to avoid situation when someone creates a VM on that USB drive ^)15:03
j05hprobably a good thing to do.15:05
zerdayep. I looked at Horizon code briefly, and seems that there is no way to remove "ephemeral" options from the "create instance" screen15:08
j05hprovide only boot from volume flavors i believe. http://docs.openstack.org/admin-guide-cloud/content/section_storage-and-openstack-compute.html15:10
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zerdaj05h, hmm, sounds like a solution. Will try this tomorrow, thank you15:18
j05hzerda: sure, no problem. hope it works for you.15:23
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CtinaWith our deployment, we've added two panels to the dashboard. They show up and display just fine but the links on the navigation panel aren't consistent, one session it'll have panel A first and the next session it'll have panel B first. The docs hint that there's a way to set ordering, has anyone set ordering for their customized panels?16:02
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Ctinaare there people here using PKI tokens and heat?16:31
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rzerdaj05h, suddenly there is a tiny option named max_local_block_devices in nova.conf, which, if set to zero, forbids any local=ephemeral storage for the node.16:56
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j05hrzerda: nice!17:14
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xavpaicezerda: without disk on the compute nodes, what happens when people suspend a VM?  Do you have some NFS type volume for that?18:39
dvorakit'd all be on the cinder volume, no?  or you mean the memory for the instance18:47
jlksuspend goes to ram no?18:48
jlkI guess there are two ways to suspend kernels normally18:48
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dvorakI'd expect if I suspend and instance that the memory would go to persistent storage18:48
dvorakbut I have no idea if it actually does :)18:49
jlkyeah I was thinking of laptop suspends18:49
dvorakI'd guess it goes to /var/lib/nova/instances18:49
jlkwhich go to memory usually instead of disks18:49
dvorakwhich may or may not go to shared storage18:49
dvorakthis says it goes to disk - http://docs.openstack.org/user-guide/content/suspend_resume.html18:50
jlkwonder then if it would go to the boot volume18:50
dvorakuh, but it also says it doesn't free any memory, which seems crazy18:50
jlkwell18:50
dvorakmaybe it doesn't free it from a scheduler standpoint18:50
jlkit may not free18:50
jlkright18:50
jlkit keeps it in reserve so that the instance could be resumed18:50
dvorakthat just seems weird to me.  seems like finding a place with enough resources to resume it would be an issue you'd worry about when you wanted to resume it18:51
jlkyeah, but you can't easily move the local disk18:52
jlkif you suspend an instance on Hypervisor A, you can't resume it on Hypervisor B18:52
jlkif local disk is involved18:52
dvorakunless you have shared storage18:52
dvoraknod18:52
dvorakI've only ever really done suspend/resume on vmware, where shared storage is assumed18:53
xavpaicewe've not tried with shared storage, but yeah, was referring to suspend putting the memory on disk18:53
dvorakactually, that's not true, share storage isn't assumed18:53
dvorakyou just can't resume it unless the storage you suspended it to is available18:53
* xavpaice wonders if there's an option to disable suspend18:53
dvorakseems like you couild with policy.json18:53
dvoraknot sure if it'll disappear from the horizon ui though :)18:54
xavpaicewell, that would at least stop people from being able to fill up the disk on a hypervisor18:54
dvoraknode18:54
dvorakerr, nod :)18:54
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dvorakbut since you have everything on cinder volumes, you can do live-migration, right?18:55
xavpaiceworks for us, cinder volumes on ceph storage18:55
dvorakah, ok.  do you do ephemeral on ceph also?18:56
xavpaicewe don't have ephemeral really, unless you count what happens when they boot from an image18:57
dvorakyeah, that's what I was thinking18:57
xavpaiceceph is our only storage - even for object store at this stage18:57
dvorakwe can do boot from image, or boot from volume with image18:57
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xavpaicesame.  We've got opened up the ability for swap etc18:58
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xavpaices/got/not/18:59
dvorakyou have people that want swap?19:00
xavpaicenot just yet :)19:00
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dvorakweird, trying to get designate to connect to rabbitmq, and rabbit keeps insisting that the user/pass is wrong19:06
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dvorakah, that's because it's wrong :)19:09
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dvorakanyone using giftwrap?21:59
jlkdvorak: we are (bluebox), in some preproduction stuff.22:02
dvorakyou guys wrote it, no? ;)22:03
jlkyeah, we just don't have it in productino yet22:03
dvorakyou're not filling me with confidence :)22:03
jlkwe are doing havana -> juno first, then switching out how we lay stuff down22:03
dvorakI really hate debian packaging, so I'm looking into it.  I ran into one or two weird problems, but I manged to get it to make a deb22:03
jlkgotcha.22:04
dvorakhow are you guys handling cli commands and such, since you have to activate the environment?22:04
jlkPersonally, I really don't like operating system packaging for something like this22:04
jlkwe're using the alternatives system22:04
jlkto install the runtime executable stuff into a $PATH22:04
dvorakwell, I've done a ton of rpm packaging in the past, and I just assumed that debian packaging would be roughly comparable.  it's dramatically more complicate for reaosns I can't relaly understand22:04
jlkthat's the part that isn't merged yet22:04
jlkoh yes22:05
xavpaicedvorak: would appreciate feedback on https://github.com/xavpaice/openstack-packages re debian packaging22:05
jlkI used to work for Red Hat, I know all about rpms. Debian/Ubuntu is just weird to me, but it's what I have to work with22:05
jlkfor stuff like openstack, where we want to lay down multiple versions and whatnot, I'd rather just use tarr'd up venvs22:05
jlkand skip the whole package repo stuff. venvs on a http source are very easy to manage22:06
dvorakjlk: maybe I'm missing something, don't I have to source the activate script before I can run something the package installs?22:06
dvorakor is there some magic I'm unaware of22:06
jlknot the way alternatives works22:06
jlkit makes a symlink22:06
dvorakxavpaice: reading :)22:07
jlkso the app is launched from within the venv22:07
jlkso the venv gets loaded22:07
dvorakinteresting.  that doesn't sound too bad22:07
dvorakare you bothering to purge old packages?22:07
jlknot as of yet , but we will at some point22:07
jlkthey don't take up a LOT of space, but they take up some.22:07
jlkWe did something similar at Rackspace, but there it was just venvs in a tarball. We'd purge old ones as a background job22:08
dvorakyeah, we're doing somethign like that for horizon and monasca22:08
dvorakbut I think the giftwrap approach would probably be faster when building dev environments and probably more reproducible22:09
jlknot sure how22:09
jlkwe had venv's in a tarball, so it was just wget and extract22:09
jlkand off you go22:09
dvoraknono, I mean compared to the way we do it for horizon and monasca22:09
jlkshould be a bit quicker than fetching apt metadata, fetching apt package, resolving deps, installing22:09
jlkah22:09
dvorakwe have ansible or puppet building the venv and installing all the stuff in it22:09
dvorakso why are you guys using packages instead of tarballs then?22:10
jlkwasn't my decision22:11
dvorakfair enough22:11
jlkif it were, we'd be using tarballs of venvs on CentOS722:11
dvorakpart of the reason packages are attractive to me is that I'm hoping I'll be able to continue to use the stackforge puppet modules without much change22:11
jlkah. Yeah, I'm no fan of puppet. We're all Ansible here. We publish those too22:12
dvorakI don't think we'll be switching even if I agreed :)22:12
jlkpuppet is terrible come upgrade time when you need to handle stops, migrations, and starts in very precise order22:12
dvorakwe use ansible for that :)22:12
dvorakw/puppet22:13
jlkhaha, RAX did that too, until I got them off of that22:13
jlkmanaging the puppet manifests was too high of a barrier22:13
dvorakthe internet does most of that for me :)22:13
jlkthe ansible playbooks were much easier to work with and got a lot more people participating in them22:13
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