Thursday, 2015-11-05

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mtaninohemna: ^^ may be your unit test problem is fixed by the patch.00:03
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smcginnisthingee: Thanks for the reminder!00:48
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kfox1111_is there an equivilent of kuryer for cinder planned?01:24
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openstackgerritAnthony Lee proposed openstack/cinder: Refactor HP LeftHand driver to now be HPE  https://review.openstack.org/24034301:35
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tbarronkfox1111_: what would equivalent of kuryr - which does neutron net plumbing to containers - be for cinder?02:32
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openstackgerritZohar Mamedov proposed openstack/cinder: Nexenta Edge iSCSI backend driver  https://review.openstack.org/15874502:42
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tbarronkfox1111_: persistent storage for containers?  flocker?02:46
tbarronkfox1111_: manila with vsocket support?02:49
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tobeHi all, I'm new to cinder project03:28
tobeIs there any book or article to analysis the source code of cinder?03:28
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openstackgerritTeruaki Ishizaki proposed openstack/cinder: Sheepdog: Improve image operations  https://review.openstack.org/20295404:14
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openstackgerritWilson Liu proposed openstack/cinder: Rename Huawei drivers  https://review.openstack.org/23804105:14
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nikeshmtobe: http://docs.openstack.org/developer/cinder/devref/ http://docs.openstack.org/developer/cinder/05:22
nikeshmmight be useful05:22
nikeshmalso google05:22
nikeshmgoogle05:22
nikeshm:)05:22
nikeshmalso you can set a devstack with lvm and using debugging you can learn more05:23
nikeshmhttp://docs.openstack.org/developer/cinder/devref/architecture.html05:24
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openstackgerritOpenStack Proposal Bot proposed openstack/cinder: Imported Translations from Zanata  https://review.openstack.org/24189706:06
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openstackgerritwanghao proposed openstack/cinder-specs: Support query volume filter by glance metadata  https://review.openstack.org/17477806:19
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openstackgerritwanghao proposed openstack/cinder-specs: Get the replicated volume ref for DR  https://review.openstack.org/18215006:29
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mkodererDuncanT: hi there, if you have time for a review: https://review.openstack.org/#/c/239517/07:32
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openstackgerritMerged openstack/cinder: Imported Translations from Zanata  https://review.openstack.org/24189711:19
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openstackgerritMerged openstack/cinder: Fix failure of unit test TestCinderAllCmd  https://review.openstack.org/24181711:22
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e0neDuncanT: hi. FYI, I've updated python-brickclient code to make it more clear. unit-tests and docs will be soon13:20
openstackgerritMerged openstack/cinder: Execute mount.nfs check with absolute path  https://review.openstack.org/23951713:20
DuncanTe0ne: Updates on github as before?13:21
e0neDuncanT: yes13:24
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openstackgerritVictor Stinner proposed openstack/cinder: Port cinder.hacking to Python 3  https://review.openstack.org/24205313:34
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openstackgerritShay Halsband proposed openstack/cinder: XtremIO fix create CG from src flow  https://review.openstack.org/24205613:37
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openstackgerritMichal Dulko proposed openstack/cinder: Add reno for release notes management  https://review.openstack.org/24167313:59
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openstackgerritShay Halsband proposed openstack/cinder: XtremIO fix create CG from src flow  https://review.openstack.org/24124414:04
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openstackgerritNate Potter proposed openstack/cinder: Remove 'refresh' parameter from driver get_stats  https://review.openstack.org/23332815:11
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openstackgerritVictor Stinner proposed openstack/cinder: Modify test_hp3par to support random hash  https://review.openstack.org/24212715:53
openstackgerritVictor Stinner proposed openstack/cinder: Port HP 3part driver to Python 3  https://review.openstack.org/24212815:53
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openstackgerritVictor Stinner proposed openstack/cinder: Port xio driver to Python 3  https://review.openstack.org/24213916:14
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openstackgerritVictor Stinner proposed openstack/cinder: Port vmware datastore to Python 3  https://review.openstack.org/24214016:16
openstackgerritVictor Stinner proposed openstack/cinder: Port test_tintri to Python 3  https://review.openstack.org/24214216:21
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openstackgerritVictor Stinner proposed openstack/cinder: Port cinder.utils.monkey_patch() to Python 3  https://review.openstack.org/24214816:33
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openstackgerritVictor Stinner proposed openstack/cinder: Port cinder.hacking to Python 3  https://review.openstack.org/24205316:36
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delattecsmcginnis:  saw your email.  ty.  I know my company tends to be ahead of the curve w/ a lot of use cases.  but this one seemed big enough that it could cause head aches for operators going down the road.16:44
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smcginnisdelattec: Sorry, which one was this about? :)16:51
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delattecBug 1501855] Re: cinder volume transfer does not update quotas for volume types16:51
openstackbug 1501855 in Cinder "cinder volume transfer does not update quotas for volume types" [Undecided,New] https://launchpad.net/bugs/1501855 - Assigned to Deepti Ramakrishna (dramakri)16:51
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smcginnisdelattec: Ah, got it. Yeah, hopefully that helps.16:52
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delattecI hope so as well.  thanks again16:53
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smcginnisNo problem.16:53
openstackgerritxing-yang proposed openstack/cinder: Implement update_migrated_volume for the ScaleIO driver  https://review.openstack.org/24093716:53
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ZZelle_Hi everyone17:22
ZZelle_I am looking for Vipin, someone knows its IRC name and time zone?17:23
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openstackgerritxing-yang proposed openstack/cinder: Implement update_migrated_volume for the ScaleIO driver  https://review.openstack.org/24093717:32
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openstackgerritAnthony Lee proposed openstack/cinder: Refactor HP LeftHand driver to now be HPE  https://review.openstack.org/24034317:32
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nikeshmZZelle_ : do you know full name17:37
xyang1ZZelle_: vipin is in India.  doesn't look like he is on IRC now17:39
ZZelle_nikeshm, yes, it's vipin Balanchandran17:39
nikeshmdonot know irc name, but email id vbala@vmware.com  https://launchpad.net/~vbala17:40
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openstackgerritMichal Dulko proposed openstack/cinder: Add LC_ALL=C to lvcreate, lvextend and pvresize  https://review.openstack.org/21667517:47
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openstackgerritNate Potter proposed openstack/cinder: Remove 'refresh' parameter from driver get_stats  https://review.openstack.org/23332818:35
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guitarzanhey guys, question, is the migrate _name_id column just there for manual intervention?18:44
guitarzanor are drivers that use it supposed to check that column on every call?18:45
hemnaguitarzan, afaik, that _name_id is there for drivers that can't rename the volume18:45
hemnaguitarzan, if that value is there, the driver needs to use that as the 'id' on every call to find it.18:45
patrickeastits used to make the volume.name consistent after migrations too18:45
hemnait's a big giant suck18:46
guitarzanpatrickeast: I'm seeing the migration case, but it's left up to the driver to always try both18:46
guitarzanhemna: gotcha, I'll chek the rename case too18:46
hemnaguitarzan, https://github.com/openstack/cinder/commit/b5f9bfab9cde44f840b530876daf400b0afd058418:47
hemnaI recently had to do that for L to fix our drivers in the case of migration.18:47
hemnawe were borked18:47
patrickeastyea, it all depends on how the driver was implemented18:47
patrickeastand what they do with the volume id18:47
patrickeastafaik it only comes into play with migrations18:48
guitarzanhemna: so can you delete a migrated volume?18:48
guitarzanpatrickeast: I think that's right18:48
hemnaonly after that patch I put in.18:48
hemnaprior to that patch we completely lost control of the volume after migration18:48
guitarzanhemna: I'm not seeing where delete checks the _name_id18:48
guitarzanI guess this is actually an unsupported operation though18:49
hemnaguitarzan, the addition of update_migrated_volume, allows the driver a chance to rename the volume and then nuke the _name_id18:49
guitarzanmigrating to the same backend18:49
guitarzanhemna: ah, hmm, let me look closer18:49
hemnaif you can't rename it, then _name_id has the real id.  our driver never looked in _name_id, and so every action after migrate would puke on that volume.18:50
patrickeastso if i understood the issue correctly it was only a problem because the driver was using the id directly to locate the volume on the array, right?18:50
guitarzanhemna: so this case18:51
guitarzanhttps://github.com/openstack/cinder/commit/b5f9bfab9cde44f840b530876daf400b0afd0584#diff-76818e780d583dcc97967b4de4e4ecfbR193218:51
guitarzanthe backend volume has a new name18:51
guitarzanso cinder has volume with old name and new name as _name_id18:52
hemnayah18:52
guitarzanbut the driver would have to check _name_id on every future call18:52
hemnawe'll still puke if that happens :P18:52
hemnaguitarzan, correct18:52
guitarzanhemna: ok, cool, just making sure I'm not missing something18:52
hemnawe are just hoping/assuming that we'll never get into that else:18:52
* hemna ducks18:52
guitarzanyeah, I think it only really happens migrating to the same backend18:52
guitarzanwhich the api doesn't even really let you do18:53
guitarzanunless you have multiple hosts pointing to it18:53
guitarzanI guess with multiple pools that's a thing too?18:53
hemnayah, that's backend assisted migration18:53
hemnaand it's up to the driver itself to deal w/ that in migrate_volume18:53
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guitarzanright18:53
hemnaone pool to another.18:53
guitarzanok, so I have a bit of work to do I think18:54
guitarzanrats18:54
guitarzan:)18:54
hemna:)18:54
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openstackgerritDiem Tran proposed openstack/cinder: Fix ZFSSA drivers' local cache bugs  https://review.openstack.org/22955419:03
openstackgerritNate Potter proposed openstack/cinder: Show qos_specs_id based on policy  https://review.openstack.org/24165919:06
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tbarronSo there is cross-project agreement on using tooz as abstraction layer over local locks or DLM.  But the20:26
tbarronfollowing still remains true, right?20:27
tbarron1. avoid races in api with compare-and-swap (don't use synchronization locks for this)20:27
tbarronand ing-states20:27
hemnatbarron, https://etherpad.openstack.org/p/mitaka-cross-project-dlm20:27
tbarron2. get rid of unnecessary locking in manager.20:28
hemnathe compare and swap is to help avoid the races in the db and anyone accessing the db field in question.20:28
tbarron3. avoid synchrnoization/locks in drivers unless absolutely required.20:28
hemnabut it helps with some of the volume manager races that require the local file locks20:28
tbarronok, so #1 and #2 are mixed.  we still want to avoid locks in api/manager.  DLM is not a panacea.20:29
hemnaDLM is a stepping stone for the locks in the manager20:30
hemnawe still want to get rid of the volume manager locks if possible20:30
tbarron++20:30
guitarzanI think it's better to say that too many locks is better than not enough20:30
tbarronnow about driver locks.  We want to identify if they are really necessary and why if so.20:30
tbarronguitarzan: ++20:30
hemnayah20:30
hemnathe driver locks are a case by case basis20:30
hemnawe were the first driver that had the locks20:31
hemna:(20:31
hemnabut we found a way to remove them entirely20:31
hemnait was a non trivial change, but ended up being for the best in the long run20:31
tbarronis Diem Tran here?  I want to understand the synchrinization locks in https://review.openstack.org/#/c/22955420:31
tbarronZFS driver20:32
tbarronclone operations are being sync/locked, to protect against (1) concurrent deletion of source for clone operation, and (2) concurrent clones.20:32
tbarronI am hoping to educate myself a bit about ZFS and also about when these locks are necesary20:34
tbarronand when they might be avoided, as HP did.20:34
guitarzanI hear the answer for all zfs problems is just more snapshots :)20:35
tbarronguitarzan: though we want to avoid the infamous GCL (winston-d's invention) - global cluster lock.20:35
guitarzanoh noes, I don't want to know what that is20:35
tbarronguitarzan: hee-hee, I think it's related to the GCF20:35
tbarron'F' for 'freeze'20:36
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openstackgerritVictor Stinner proposed openstack/cinder: Port HP 3PAR driver to Python 3  https://review.openstack.org/24212820:41
openstackgerritVictor Stinner proposed openstack/cinder: Modify test_hp3par to support random hash  https://review.openstack.org/24212720:41
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tbarronI kinda think the locks in https://review.openstack.org/#/c/229554 could be avoided by fail and retry logic.20:58
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tbarronanyone working on replication v2 for lvm on top of drbd?21:02
smcginnistbarron: Are you volunteering? :)21:03
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tbarronsmcginnis: not sure I can get clearance for actually coding it.  But it might be a case for Replication Groups along the lines of the discussion last Friday.21:04
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tbarronso I'm playing around with it a bit and just want to find who has already been there.21:05
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smcginnistbarron: Yeah, that would be good to have another backend looking at what you're trying to do.21:06
xyang1tbarron: I think there was someone there on Friday, I am not positive about his nick21:07
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xyang1tbarron: I think he has already started working on replication as well as cg21:11
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openstackgerritWalter A. Boring IV (hemna) proposed openstack/os-brick: Fetch and return SCSI WWN  https://review.openstack.org/24222121:12
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openstackgerritWalter A. Boring IV (hemna) proposed openstack/os-brick: Fetch and return SCSI WWN  https://review.openstack.org/24222121:15
tbarronxyang1: thanks.  Now that you mention it, I remember there was a guy from linbit sitting down at the end of the room.21:16
xyang1tbarron: yes, it was him21:17
tbarronxyang1: maybe I'll try my question again earlier in the day in Austria.21:17
xyang1his nick is flip21421:18
openstackgerritVictor Stinner proposed openstack/cinder: Port HP 3PAR driver to Python 3  https://review.openstack.org/24212821:19
tbarronxyang1: thanks!21:20
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xyang1tbarron: even if you try to do it with volume types and extra specs, you still need to somehow get the manager to update volume status for you.  you can't do that part in your driver21:21
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xyang1tbarron: that is statuses for all volumes in your pool or a group21:22
tbarronxyang1: good point.  I'm right now vacillating between trying to do as much as possible with volume types, extra specs, and driver,21:22
tbarronon the one hand,21:22
tbarronand making a new Replication Group object, kinda like CG object ...21:23
tbarronxyang1: BTW, you have outstanding patch for CG to remove need for driver DB access, right?21:23
tbarronxyang1: if so, do you have the review number handy?21:23
xyang1tbarron: yes21:23
xyang1tbarron: I need to fix my devstack to test the latest change21:24
tbarronxyang1: sure. We're doing some CG code for one of our drivers and I'd just as soon remove the DB21:25
tbarronaccess when that becomes reasonable.21:25
tbarronxyang1: so might be interested in helping your review move along :-)21:25
xyang1https://review.openstack.org/#/c/229580/21:26
tbarronxyang1: ty!21:26
xyang1tbarron: so that is why I said there are multiple ways of solving the problem21:27
tbarronxyang1: +121:27
xyang1tbarron: we are kind of leaning towards having a new replication resource in the api, but then we need to have a uuid for the pool21:28
tbarronxyang1: sure21:30
tbarronxyang1: I've got one backend where the replication group will most naturally map to a pool.21:30
xyang1tbarron: if you use a replication groupm that means we will add a new set of apis for the group, in addition to volume21:30
tbarronxyang1: it could actually be a set of pools.21:30
tbarronand I have another backend where the replication group spans storage pools, consists of arbitrary sets of21:31
tbarronvolumes from these, and doesn't map to a consistency group :-)21:31
xyang1tbarron: I mean you'll need to have apis to add and remove volume to the group to maintain the relationship21:31
tbarronxyang1: it would like end up looking a lot like the CG apis :-)21:32
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tbarronso far as I can tell.21:32
xyang1tbarron: I know you don't like to use the name CG:), but all your volumes in your grouping are still consistent21:33
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xyang1tbarron: so still have commonalities21:33
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tbarronxyang1: well, for the pool-model they are consistent, but a consistency group can be more.21:34
xyang1tbarron: what more21:34
xyang1tbarron: not consistent?21:34
tbarronxyang1: for the other backend, I don't think they generate same-point-in-time snapshot21:34
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tbarronxyang1: CG can span pools, and can be comprised form part of pools.21:35
xyang1tbarron: consistent is not just point in time21:35
xyang1tbarron: our replication groups are consistent21:35
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xyang1tbarron: your pool model is consistent21:35
tbarronxyang1: I'm just say I don't think I can guarantee CG snapshot, which is the central feature, for all volumes in my replication group.21:35
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xyang1tbarron: that is ok21:36
tbarronxyang1: yeah, pool model is.21:36
xyang1tbarron: only cgsnapshot is CG snapshot21:36
tbarronI thought CG snapshot is the core feature for CGs.21:36
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xyang1tbarron: consistencygroups is just a group of volumes in cinder21:36
tbarronif vols are together in a CG I have to support CG snapshot on that set of vols21:36
xyang1tbarron: we just introduced it for snapshot as first step21:37
tbarronxyang1: so I can have a CG but not be able to CG snapshot them????21:37
xyang1tbarron: my intention was to do cg replication as well21:37
xyang1tbarron: yes, you can create a cg, it does not have a snapshot21:38
xyang1tbarron: create_cg just puts the volumes together21:38
tbarronxyang1: but I must be *able* to do CGsnapshot with all the vols in the CG, right?21:38
openstackgerritAlex O'Rourke proposed openstack/cinder: 3PAR: Implement v2 replication (managed)  https://review.openstack.org/23120121:38
xyang1tbarron: no21:38
xyang1tbarron: creat_cgsnapshot is a different api21:39
tbarronxyang1: wow, CGs sound like Winston's idea of Volume Groups with different kinds of policy specs: consistent snapshot, replication, perhaps other stuff.21:39
xyang1tbarron: yes21:40
tbarronxyang1: maybe it's the name "Consistency Group" that is confusing me.21:40
xyang1tbarron: sorry, CG is the only name I know for group replication21:40
xyang1tbarron: I actually learns about cg replication before I learn cg snapshot21:41
tbarronxyang1: Wow, I wish I'd been around when this stuff came up in the first place.  Maybe we could have just called them Volume Groups and everybody would be happy.21:41
xyang1tbarron: we need to fix the VD later21:41
xyang1tbarron: but VolumeGroup is too general:)21:42
tbarronxyang1: yeah, I'll stay away from the ABC conversation for now.21:42
xyang1tbarron: sure21:42
xyang1tbarron: I think we can use volume type and extra specs to make the CG do snapshot or replication21:43
tbarronxyang1: I just mean that this group of volumes, whatever it is called, can be used for different purposes, and doesn't have to support them all.21:43
tbarronxyang1: I need to digest that thought a bit.21:43
xyang1tbarron: agree21:43
xyang1tbarron: let's talk about this again after you look at the cg api and db schema21:44
xyang1tbarron: it will be much better if we can use the existing db and api21:45
tbarronxyang1: sure.  If we go this way, we'll need to think about how these groups get marked as supporting CGSnapshots or not, Replication or not, etc.21:46
xyang1tbarron: sure21:46
xyang1tbarron: capability reporting needs to change21:46
tbarronwell, I'm going to drive home now and likely dream about this stuff tonight.  Good conversation!21:47
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xyang1tbarron: maybe we still need to add a CGReplication table but it will have a foreign key of consistencygroup_id from the consistencygroup table21:49
xyang1tbarron: let's sync up later21:49
tbarronkk, later.21:49
xyang1tbarron: sure, drive safe21:49
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openstackgerritAlex O'Rourke proposed openstack/cinder: 3PAR: Implement v2 replication (unmanaged)  https://review.openstack.org/23124522:16
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SwansonDid I read that consistency groups are not there for the purpose of making cgsnapshots?22:44
openstackgerritAlex O'Rourke proposed openstack/cinder: 3PAR: Implement v2 replication (unmanaged)  https://review.openstack.org/23124522:44
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patrickeastSwanson: if not that, then what?22:47
xyang1Swanson: no, CG can be used for snapshot or replication, in patrickeast 's case, both22:48
xyang1Swanson: we probably need to make some changes in capability reporting to make it clear22:48
xyang1Swanson: I'll update the spec and hopefully make it a little clear22:50
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hemnapatrickeast, http://openstack-logs.purestorage.com/64/199764/19/check/PureFCDriver-tempest-dsvm-volume-multipath-brick/1914eeb/console.html23:04
hemnapewp23:04
hemnafatal: unable to connect to git.openstack.org:23:04
hemnagit.openstack.org: Name or service not known23:04
hemnaheh23:04
hemnaoopsie23:04
patrickeastfatal: unable to connect to git.openstack.org:23:05
patrickeasthaha23:05
patrickeastniiicee23:05
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hemnathe ceph os-brick job is puking 100% now as well23:05
hemna:(23:05
patrickeastfrom the ebs test?23:05
patrickeastor somethin else?23:06
hemnahttp://paste.openstack.org/show/478135/23:06
hemnathat every time23:06
patrickeastoo haven't seen that one before23:06
hemnajust started popping up today23:07
hemna*sigh*23:07
hemnaI've been trying to get my other major os-brick patch to finally land....23:07
hemnabut jenkins isn't happy due to that failure23:07
hemnahttps://review.openstack.org/#/c/199764/23:07
hemnathat guy23:07
tbarronthose hpe nameservers are confused ...23:07
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hemnaand hp and pure ci is puking on it :(23:08
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hemnahuh23:08
hemnalatest recheck 'fixed' the ceph os brick job23:08
patrickeastmm recheck should help with the pure ones23:10
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hemnahttp://openstack-logs.purestorage.com/64/199764/19/check/PureFCDriver-tempest-dsvm-volume-multipath-brick/1914eeb/console.html23:11
hemnaheh23:11
hemnawell at least it failed qucikly23:11
hemna4s23:11
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patrickeasthemna: its back on the queue for pure ci, so far so good23:13
patrickeastpast the 4 second mark at least ;)23:14
hemnaw00t!23:14
hemnaship it!23:14
hemnaif ci_runtime > 4: ship()23:14
patrickeastlol23:14
patrickeasti have a theory about what happened... that time corresponds to when i was playing around setting up a new initiator in my ci network23:15
patrickeastand right about the time i realized i accidently gave it the same static ip as the one hosting test vm's that would have been doing those jobs23:16
hemnaheh23:16
patrickeastcopy paste fail23:16
hemnarm -rf /23:17
hemnaoops...23:17
hemnadamn23:17
hemnathat's even troublesome to type in irc.23:17
patrickeasthaha23:18
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hemnapatrickeast, https://review.openstack.org/#/c/242221/23:27
hemnawhen you have time23:27
hemnastarted looking into how to do the attached volume resize stuff in brick as well23:28
hemnanothing in code just yet though23:28
openstackgerritYucong Feng proposed openstack/cinder: Mark oslo.vmware as optional dependency  https://review.openstack.org/24225723:29
patrickeasthemna: oh dang, just noticed i rechecked again23:30
hemnawell if 1 recheck is good 2 is better23:31
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pocketprotectorhas anybody ever used scality ring here?23:58
hemnanot I23:59
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