Saturday, 2011-04-02

« Friday, 2011-04-01 Index Sunday, 2011-04-03 »
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uvirtbotNew bug: #747922 in nova "Rebooting instance doesn't restore mounted volume" [Undecided,New] https://launchpad.net/bugs/74792201:16
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nelsonAnybody know if !Migration-Timestamp! actually works?02:08
nelson(as a header presented to the proxy to set the last-modified timestamp?)02:08
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nelsonWell, apparently it won't be working in the future ... https://code.launchpad.net/~redbo/swift/unmigrate/+merge/4355102:11
nelsonI'm wondering why not -- as far as I can tell that's the only code which lets you set the timestamp on an object.02:12
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notmynamenelson: that timestamp was left-over from when we migrated from pre-swift to swift04:13
notmynameinternal to rackspace04:13
notmynamecode for that header got left in the open source release04:13
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notmynamenelson: but with the recent arbitrary header merge, you will be able to set a list of headers in the object server config file that you can allow to be set on objects04:20
notmynamehttps://code.launchpad.net/~notmyname/swift/arbitrary_headers/+merge/5445504:23
gholtnelson: If you were to use that and a newer object were already in place, your new (but stamped older) put would be discarded.04:30
gholtnelson: Even stranger to an outside client, if you did a put with a specific old timestamp after a delete with a newer one, the delete would win and the put would be discarded.04:33
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minimikeHi there,13:10
minimikeI've read the instructions about RHEL6 on http://wiki.openstack.org/NovaInstall/RHEL6Notes13:10
minimikeit is possible to chose PostgreSQL instead MySQL?13:11
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thatsdoneminimike: I have not tried PostgreSQL yet. But, so far as I know, there are at least 2 successful reports on PostgreSQL.13:22
thatsdoneminimike: Maybe we need some fixes, but I believe it's almost straight forward.13:23
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minimikethatsdone: the reason is I don't like MySQL. Everything in our network runs with PostgreSQL13:25
minimikebut thank you13:26
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minimikeSo I should better get a developmentbrunch via git/svn?13:27
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thatsdon_IMHO, using pre-cactus PPA packages would be a good idea. RHEL case, GridDyamics provides trunk rpm repository.13:52
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minimikethatsdon_: I'm not very familiar with Python. Java is my preferred language14:13
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minimikeso the RPMS from http://yum.griddynamics.net/yum/master/nova/ should do the job?14:14
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thatsdon_minimike: Don't worry. In case of me, C is my preferred language.15:21
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zacconegood evening19:15
zacconeI was just wondering  - does nova-compute has some features for monitoring instances? Suppose I have one instance serving X, and the hardware with that instance goes down. Can nova-compute automatically run that instance on other available hardware?19:16
nelsongholt: that behavior is consistent with our use case, so no biggie.19:17
nelsonnotmyname: when will that code get into production?19:18
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redboI don't know how the arbitrary header thing is supposed to help with this particular question.  It wouldn't let you set your own x-timestamp.19:24
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zacconeredbo: does it concern my question?19:30
redbooh no, nelson's19:30
zacconeredbo: sorry then19:30
redbosorry, should have specified19:30
redbonelson: if that's useful to you, we could probably make accepting timestamps from clients a configurable option.19:33
nelsonredbo: don't need to set x-timestamp, but instead last-modified:19:35
nelsonassuming that it lets me overwrite default headers (except for the listed few) then I'm good.19:35
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notmynamenelson: just tested the arbitrary headers with last-modified. it doesn't currently allow it to be overridden19:38
notmynamebut the code is in swift trunk now19:38
redbonelson: my guess is that won't work like you want19:39
nelsonwhat I really want is !migration-timestamp! because that's exactly what we're doing -- migrating something in.19:39
notmynameunless you absolutely need last-modified to be set, you could use the arbitrary headers for a different header name (if you don't want to use X-Object-Meta-*) for the same data19:40
notmynameah19:40
nelsonafter we're migrated, the default x-timestamp code will work fine.19:40
notmynameI understand19:40
notmynameI like redbo's idea of letting some of the defaults be overridden by config. currently the only way would be to maintain your own patch agains swift to set that up19:41
nelsonkinda wondering why it got taken out -- since that's the only way I can see to set a file's timestamp.19:41
redboyeah, letting the client specify timestamps.  We could put the logic back in and make it a config flag.19:41
nelsonwell, for that matter, you could just patch in the code, do the in-migration, and back it out again. :-)19:41
notmynameheh, that's exactly what we did at rax19:42
redboIt can be kind of weird.  It's always newest timestamp wins, so there's no way to set timestamps backwards.  Actually, there's no great reason we use the same timestamp for versioning and last-modified.  So that might be a good thing to explore later.19:43
redbonelson: basically, that timestamp is part of how versioning is done internally, which we don't want to expose to the user.  It also serves as last-modified header, which might be okay to expose to the user.19:46
nelsonredbo: understood. But I gotta get last-modified set to the same value as our old server is putting out, otherwise the squid caches get confused about version numbers.19:47
nelsoncaching everything twice just because of a wrong timestamp is sub-optimal.19:47
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HYJiNX1hey guys, i noticed the esxi support feature was recently checked in and i wondered if anyone here could help me with a few questions around how esxi actually fits into the architecture.19:53
HYJiNX1I'm actually hoping to install it today and check it out19:53
redbonelson: Yeah.  I can put that migration timestamp logic back in there with a config option if you want (which might take days), or you can just do it on your own proxy.19:54
nelsonmigration will probably take about a week.19:54
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redboLucky, it took me 3 months.  And I kept killing hard drives in the legacy system.19:58
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HYJiNX1AHHHH22:40
HYJiNX1got it22:40
HYJiNX1http://pastebin.com/c7URdtaR22:41
HYJiNX1ESXi functionality is going to be imported using nova-manage import22:41
HYJiNX1through nova.virt.vmwareapi_conn module22:42
HYJiNX1so it would look something like this im assuming22:42
zacconetime to bed, bye everyone22:43
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HYJiNX1http://pastebin.com/sdwaK7FC22:44
HYJiNX1I need to know what they are actually naming that ESXi API and the exact names of the modules22:45
HYJiNX1and I need to know what the syntax is for providing the IP L/P22:45
HYJiNX1I'm assuming this is likely in the .py file22:46
HYJiNX1I'll start there22:46
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