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#openstack-nova - 2017-03-29
19:48:24 bauzas I just take that as a personal interest in it
19:48:37 bauzas it's *not* a priority, dang.
20:04:12 openstackgerrit Sujitha proposed openstack/nova master: Adding auto_disk_config field to InstancePayload https://review.openstack.org/419185
20:04:58 openstackgerrit Sujitha proposed openstack/nova master: Reduce calls to load_tags() to 0 https://review.openstack.org/435146
20:12:44 jaypipes bauzas: -2 on that affinity group spec. see my review...
20:14:23 bauzas jaypipes: well, there are usecases where people want to define a lease, and start paying for that lease when it starts
20:14:46 bauzas here, booting instances in advance is suboptimal for an OPEX PoV
20:14:57 jaypipes bauzas: see my review. there's no difference between reserving and using a resource in Nova.
20:14:57 dansmith why?
20:15:10 dansmith boot it now, rebuild it if you need a different image later
20:15:12 bauzas jaypipes: in Nova, I totally agree
20:15:20 bauzas lemme make it cleat
20:15:23 bauzas clear
20:15:30 bauzas I'm not talking at all about Nova providing that
20:15:47 jaypipes bauzas: the inability of another tenant using that "slot" of resources makes the reservation exactly equal in cost to the use of something.
20:15:47 bauzas and I'm -2 on that idea too if you prefer
20:16:42 openstackgerrit Anusha Unnam proposed openstack/nova master: Add description to policies in servers_migrations.py https://review.openstack.org/451487
20:16:56 bauzas jaypipes: I'm trying to explain that without a whiteboard, hold on
20:17:26 bauzas jaypipes: there are situations where, as a tenant, I want to make sure I will have the capacity in 2 hours
20:17:37 bauzas for a certain duration
20:17:43 bauzas unrelated to my quotas
20:18:40 bauzas jaypipes: the fact that another tenant could use all the resources *before* or *after* my period doesn't really hurt me
20:19:18 mriedem jaypipes: thanks for looking at https://review.openstack.org/#/c/441692/ again
20:20:07 bauzas jaypipes: what people want is some way to say "I'm gonna lock some resources not for now, but when my period will start"
20:20:40 bauzas dansmith: rebuild doesn't guarantee you it will success by the time you do it
20:20:54 dansmith bauzas: eh?
20:20:57 mriedem neither does reserving and saying you're going to create a server in 2 hours
20:21:12 mriedem if ceph crashes
20:21:20 bauzas dansmith: you're asking the scheduler for rebuild
20:21:56 mriedem maybe this is the thing where people have asked in the past for a way to create a server in stopped state immediately
20:22:01 mriedem as a workaround for a lack of reservations
20:22:05 bauzas mriedem: agreed, all of that supposes a fully functional cloud
20:22:23 bauzas mriedem: yup, shelved instances was the hack
20:22:35 bauzas shelved *offloaded*
20:22:41 mriedem rather than just create and then stop in separate calls
20:22:58 bauzas but by the time the instance unshelves, you have no guarantee that it will succeed
20:23:15 dansmith bauzas: rebuild doesn't ask anything of the scheduler right?
20:23:32 bauzas dansmith: lemme verify, my guts say the contrary
20:23:51 dansmith only for evacuate, IIRC
20:24:25 mriedem the scheduler has to take into account image properties in the new image
20:24:26 mriedem for rebuild
20:24:50 mriedem i think we actually have a bug for that,
20:24:54 mriedem because we don't do that today
20:25:08 dansmith bauzas: host=instance.hosdt
20:25:34 mriedem that's the bug
20:25:49 mriedem the new image could have properties that don't fit the instance's existing host
20:25:57 bauzas dansmith: yeah you're right, just verified
20:26:06 dansmith mriedem: right, but rebuild is supposed to be in place
20:26:06 bauzas dansmith: and I think it's a miss
20:26:23 mriedem https://bugs.launchpad.net/nova/+bug/1667667
20:26:23 openstack Launchpad bug 1667667 in OpenStack Compute (nova) "Rebuilding instance ignores image's property hw_disk_bus" [Low,Confirmed]
20:26:25 bauzas mriedem: resize != rebuild
20:26:31 mriedem bauzas: i know
20:26:46 bauzas mriedem: yeah I know you know, but it's not taking a new flavor, right?
20:26:55 bauzas oh, the image props
20:26:59 dansmith image
20:27:00 dansmith right
20:27:13 bauzas so yeah, we should call the scheduler too
20:27:15 jaypipes mriedem: np
20:27:33 bauzas either way, I think we should call it, just because we need to verify we can still fit onto the host
20:27:48 dansmith if we change hosts during a rebuild, we have more work to do right?
20:27:53 dansmith we have to handle volumes and ports and stuff
20:28:02 bauzas yeah
20:28:07 dansmith because rebuild assumes the original host is gone and is going to destroy on reboot
20:28:09 dansmith personally,
20:28:11 bauzas but we should restrict to the same host
20:28:20 dansmith I'd rather refuse to let you rebuild as another image if it's so incompatible that you can't rebuild in place
20:28:21 bauzas just verifying the scheduler once more
20:28:52 bauzas using requested_destination as saying "I want to test this one only"
20:29:03 bauzas anyway, I think we're diverting
20:29:29 bauzas I'm no longer involved with all those reservation crazy ideas, so I defer other Blazar folks to provide good usecases for that
20:29:33 bauzas but I bet they are
20:29:37 bauzas there are*
20:30:15 bauzas what I want is not a crazy hack or a new API into Nova
20:30:40 bauzas what I want is to see how the placement service could help their problems, that's it
20:30:56 bauzas and avoid seeing specs like https://review.openstack.org/#/c/389216/2
20:31:17 jaypipes_ mriedem, bauzas: sorry, electrician turned off the power. :(
20:31:53 bauzas jaypipes_: heh, it's a trap
20:31:57 dansmith jaypipes_: don't be sorry, consider yourself lucky
20:39:40 bauzas heh, should I propose https://www.amazon.com/APC-Back-UPS-Protector-Charging-BE600M1/dp/B01FWAZEIU/ref=lp_764572_1_1?s=pc&ie=UTF8&qid=1490819957&sr=1-1 to jaypipes ?
20:49:13 openstackgerrit Anusha Unnam proposed openstack/nova master: Add keypairs field to InstancePayload https://review.openstack.org/419730
21:04:16 mriedem dansmith: evacuate assumes the original host is gone, same code path to rebuild in the compute i know,
21:04:33 mriedem but i'm just pointing out the thing where you rebuild on a live host, and we don't validate the new image props still work on that host,
21:04:36 mriedem i agree we should just fail in that case
21:04:40 mriedem rather than try to rebuild on another host
21:05:14 mriedem i think we actually have a duplicate for that bug, i swear bauzas was on another bug just like that
21:06:12 bauzas mriedem: none I remember but okay :)
21:06:21 bauzas I rather have a long list of TODOs :)
21:07:37 mriedem bauzas: maybe get some sleep, and get up early, drink some nice french press coffee, a crepe, and tackle that todo list :)
21:08:01 mriedem oh i found the other bug
21:08:18 bauzas sleep is for weak people
21:08:47 bauzas enough spilled time
21:10:03 mriedem says the guy whose government mandates he only works a certain number of hours and has mandatory PTO
21:10:13 mriedem hi-o!
21:13:03 bauzas mriedem: I live close to Switzerland
21:16:25 efried Tu veux-dire que les suisses travaillent comme toi? Ou que tu travailles comme les suisses? ;-)
21:18:39 openstackgerrit Eric Fried proposed openstack/nova master: Glance download: only fsync files https://review.openstack.org/451094
21:19:16 efried mdbooth ^^ Hopefully this (plus the fact that fsync isn't used anywhere else) goes toward assuaging your concerns about having to check everywhere.
21:19:26 efried thorst ^^ see whatcha think.
21:19:53 thorst efried: looking

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