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| DuncanT | Anybody here for the volumes meeting? | 18:01 |
|---|---|---|
| deshantm | what's the volumes group all about? | 18:02 |
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| DuncanT | Block device support for nova | 18:03 |
| DuncanT | Oh, wait, I'm a week early | 18:04 |
| DuncanT | Oooops | 18:04 |
| deshantm | :) | 18:05 |
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| deshantm | I like to see the ethusiasm | 18:05 |
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| vishy | ! | 18:13 |
| DuncanT | vishy: While we're both here, can I ask you to expand on your comments on https://review.openstack.org/#change,3959 please? | 18:17 |
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| DuncanT | If you're not too busy | 18:17 |
| vishy | DuncanT: I can try | 18:18 |
| vishy | so basically if volume is an independent service you shouldn't be able to arbitrarily set the state of volumes from the outside | 18:18 |
| DuncanT | The basic point of the patch is to close the window between when the api sees the request and it gets actioned | 18:18 |
| vishy | DuncanT: so the way that we tell volume to prepare for something attaching is initialize_connection | 18:19 |
| vishy | so an attaching state makes sense to me there | 18:19 |
| vishy | I don't like the attach call either that arbitrarily sets the state to attached | 18:19 |
| DuncanT | But initialize_connect can take some time to get run, leaving a bigger window than I'd like | 18:19 |
| vishy | DuncanT: you can set it at the very beginning of initialize_connection | 18:20 |
| vishy | it doesn't have to wait for the backend | 18:20 |
| vishy | right now we have a call from compute setting the state to attached | 18:20 |
| DuncanT | We've seen times when it can occasionally take minutes to get an rpc to nova-compute though | 18:20 |
| vishy | this really should be done by the backend when it notices the iscsi attachment, but i'm ok using the hack for now | 18:21 |
| vishy | DuncanT: I don't understand, it doesn't have to rpc to compute | 18:21 |
| DuncanT | What do you mean by 'the backend'? | 18:21 |
| vishy | compute -> initialize_connection -> volume | 18:21 |
| vishy | as soon as nova-volume receives initialize_connection it sets the state of volume to attaching | 18:22 |
| vishy | then it calls driver.initialize_connection and returns the data to compute | 18:22 |
| DuncanT | But there can be a big window between API getting the request (and sending back a reply) and the RPC making it to nova-volume | 18:22 |
| vishy | hmm | 18:23 |
| vishy | DuncanT: oh! you are setting it on the compute side | 18:23 |
| vishy | sorry i misread | 18:23 |
| DuncanT | In the mean time, the user might think it has failed, and try to attach it to another instance, and where it ends up becomes random | 18:23 |
| vishy | DuncanT: hmm, ultimately initialize_connection should probably be called much earlier | 18:24 |
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| vishy | DuncanT: seems like we really should be keeping that state in the compute side somewhere | 18:25 |
| vishy | DuncanT: let me think on this for a minute | 18:25 |
| DuncanT | np | 18:25 |
| vishy | so you're really using it as a pre-attach reservation | 18:25 |
| vishy | maybe we should have something like reserve_volume | 18:25 |
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| DuncanT | That is exactly what we're doing, yes. since the state is passed straight back to the user in euca-describe-volumes and the nova equivalent, 'attaching' seemed to make most sense semantically, but yes, internally we are reserving the volume | 18:27 |
| vishy | gtg. | 18:28 |
| vishy | ok i'm ok with this for now i guess | 18:28 |
| vishy | i really don't like the generic update call as an api | 18:28 |
| vishy | but we can change that later | 18:28 |
| DuncanT | Agreed | 18:28 |
| DuncanT | Can you touch the review again, or should we re-submit? | 18:29 |
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| vishy | DuncanT: probably needs a rebase I would guess. Almost wonder if we should go ahead and add in a call reserve_volume instead of using volume_api.update() | 19:29 |
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| n0ano | anyone here for the orchestration meeting? | 20:00 |
| mikeyp | I'm here | 20:01 |
| n0ano | I guess we're good then. | 20:02 |
| n0ano | #startmeeting | 20:02 |
| openstack | Meeting started Thu Feb 16 20:02:28 2012 UTC. The chair is n0ano. Information about MeetBot at http://wiki.debian.org/MeetBot. | 20:02 |
| openstack | Useful Commands: #action #agreed #help #info #idea #link #topic. | 20:02 |
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| n0ano | #topic future meetings going forward | 20:03 |
| *** openstack changes topic to "future meetings going forward" | 20:03 | |
| n0ano | We can wait a minute or two for any others to join but I think the important topic is where do we go from here. | 20:03 |
| mikeyp | I would agree - last meeting was last year ? | 20:04 |
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| n0ano | late last year but yes, it's been a month or two. | 20:04 |
| n0ano | My main interest is the scheduler but I think people have interest in other areas that we can continue work on | 20:05 |
| mikeyp | I think the Zone changes and scheduler stability changes were necessary, but delayd all this. | 20:06 |
| mikeyp | I have interests in both the schedule, and the general internal messaging interfaces. | 20:06 |
| n0ano | which is fine but how do we energize people to get involved again? | 20:06 |
| mikeyp | Yun has interest, since he has done extensive research in distributed transaction management and orchestration. | 20:07 |
| n0ano | sounds good, I wonder if we need to start some threads on the email list, maybe that will get people's attention | 20:08 |
| mikeyp | Andrew Beehhof also had interest. | 20:09 |
| mikeyp | Probably next steps should be to 'close' the orchestration list, and move the discussion back to the main list. | 20:09 |
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| mikeyp | Then, revisit Sandy's original blueprint in light of the latest changes in Essex. | 20:09 |
| mikeyp | And, deal with the politics of naming around 'orchestration' :-) | 20:10 |
| n0ano | what's in a name :-) I personally don't care as long as it's named something but those politics do seem to be an issue. | 20:11 |
| mikeyp | it's not a big issue - we just pick another name, and carry on. | 20:11 |
| mikeyp | Should we aim to organize something at the Folsom summit ? | 20:13 |
| n0ano | I'm thinking that might be the best thing, rather than shut down completely we just go fallow until the Folsome summit and then re-invent things from there. | 20:14 |
| n0ano | We can leave this time slot here in case something comes up on the email list just in case. | 20:14 |
| mikeyp | I don't see any substantial code progress before the summit, but there may be blueprint progress. | 20:14 |
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| mikeyp | so, lets schedule another meeting for next week, and announce on the main list. | 20:16 |
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| n0ano | Agreed, I'll send out an email about it and keep this slot open but we'll definitely decide what to do at the Folsome summit at the latest. | 20:17 |
| mikeyp | makes sens to me. | 20:18 |
| n0ano | #action n0ano to send email to list keeping this meeting slot open but looking for more formal decision at the Folsome summit | 20:18 |
| n0ano | OK, unless you have anything else I'll close the meeting today and I'll be back next week. | 20:19 |
| mikeyp | I think we're done for today - thanks for chairing. | 20:20 |
| n0ano | NP | 20:20 |
| n0ano | #endmeeting | 20:20 |
| *** openstack changes topic to "Status and Progress (Meeting topic: keystone-meeting)" | 20:20 | |
| openstack | Meeting ended Thu Feb 16 20:20:44 2012 UTC. Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4) | 20:20 |
| openstack | Minutes: http://eavesdrop.openstack.org/meetings/openstack-meeting/2012/openstack-meeting.2012-02-16-20.02.html | 20:20 |
| openstack | Minutes (text): http://eavesdrop.openstack.org/meetings/openstack-meeting/2012/openstack-meeting.2012-02-16-20.02.txt | 20:20 |
| openstack | Log: http://eavesdrop.openstack.org/meetings/openstack-meeting/2012/openstack-meeting.2012-02-16-20.02.log.html | 20:20 |
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