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| openstackgerrit | Clinton Knight proposed openstack/cinder: Capability lists in Cinder scheduler https://review.openstack.org/331258 | 00:47 |
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| openstackgerrit | Jack Lu proposed openstack/cinder: Add 'context.elevated()' to VolumeNumberWeigher https://review.openstack.org/331967 | 00:56 |
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| openstackgerrit | KongWei proposed openstack/cinder: Add ZTE Block Storage Driver https://review.openstack.org/312355 | 00:59 |
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| openstackgerrit | kan kato proposed openstack/cinder: Remove deprecaterd mapping in manager.py https://review.openstack.org/333083 | 02:12 |
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| openstackgerrit | xing-yang proposed openstack/cinder: Check 'thin_provisioning_support' in extra specs https://review.openstack.org/315352 | 02:32 |
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| openstackgerrit | xing-yang proposed openstack/cinder: Call _init_volume_driver in backup manager https://review.openstack.org/331835 | 02:36 |
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| openstackgerrit | xing-yang proposed openstack/cinder: WIP: Fix backup temp snapshot path on remote node https://review.openstack.org/319434 | 03:09 |
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| openstackgerrit | xing-yang proposed openstack/cinder: WIP: Fix backup temp snapshot path on remote node https://review.openstack.org/319434 | 03:15 |
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| ildar | hi, ppl! | 03:53 |
| ildar | q: when I create an Instance, horizon doesn't allow to choose the volume type. How this is regulated? | 03:53 |
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| Suyash | ildar, you can set a default volume type by changing 'default_volume_type=<value>' in cinder.conf | 04:13 |
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| openstackgerrit | Jack Lu proposed openstack/cinder: Use elevated context to query DB in VolumeNumberWeigher https://review.openstack.org/331967 | 04:32 |
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| openstackgerrit | Ryan Liang proposed openstack/cinder: VNX: New Cinder driver in Newton https://review.openstack.org/312427 | 05:06 |
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| ildar | Suyash: you mean the option of cinder-volume? There maybe several cinder-volumes, I don't think it's the right place for such a config. | 05:25 |
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| openstackgerrit | Dinesh Bhor proposed openstack/cinder: Make dict.keys() PY3 compatible https://review.openstack.org/332099 | 05:33 |
| openstackgerrit | Liu Qing proposed openstack/cinder: fix cinder ceph backup driver padding error https://review.openstack.org/332029 | 05:34 |
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| openstackgerrit | wanghao proposed openstack/cinder: Unmanaging vol/snap reduces quota incorrectly https://review.openstack.org/232436 | 07:16 |
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| openstackgerrit | xiexs proposed openstack/cinder: Move _check_metadata_properties to cinder/utils https://review.openstack.org/330502 | 07:31 |
| openstackgerrit | xiexs proposed openstack/cinder: Add validation for the metadata properties https://review.openstack.org/330913 | 07:31 |
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| genunix | Hello, does anyone have experience with using fc zonemanager in kilo? I have correctly configured cinder.conf for cinder-volume instance by docs (having zoning_mode = fabric set for each storage backend) but from debug log I can't even see that it loads that brocade driver. | 07:46 |
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| openstackgerrit | wanghao proposed openstack/cinder: [WIP]Refactor volume status in managing vol https://review.openstack.org/333164 | 08:15 |
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| openstackgerrit | wanghao proposed openstack/cinder: Unmanaging vol/snap reduces quota incorrectly https://review.openstack.org/232436 | 08:19 |
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| openstackgerrit | Claudiu Belu proposed openstack/os-brick: Add Windows Fibre Channel connector https://review.openstack.org/323780 | 08:30 |
| openstackgerrit | Claudiu Belu proposed openstack/os-brick: Add Windows SMBFS connector https://review.openstack.org/323781 | 08:30 |
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| openstackgerrit | OpenStack Proposal Bot proposed openstack/cinder: Updated from global requirements https://review.openstack.org/333175 | 08:39 |
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| sakthi | Hi I'm facing the pbm while creating a volume from image:> Exception during message handling: Failed to copy image to volume: qemu-img: error writing zeroes at sector 0: Invalid argument | 08:48 |
| sakthi | any suggestion | 08:48 |
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| caoshufeng | sakthi, It would be better to provide more logs in your environment. | 09:05 |
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| pbandark | sakthi, if its nimble storage https://bugs.launchpad.net/cinder/+bug/1568727 | 09:08 |
| openstack | Launchpad bug 1568727 in Cinder "Failed to copy image to volume: qemu-img: error writing zeroes at sector 0: Input/output error" [Undecided,Invalid] | 09:08 |
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| sakthi | caoshufeng: ERROR oslo_messaging.rpc.dispatcher [req-a005f40f-2dd0-455f-bfde-adb911695e36 92a21259ed8a493a81a668f821a7a6dd 5b85610664b944f59a79a7056ffaed44 - - -] Exception during message handling: Failed to copy image to volume: qemu-img: error writing zeroes at sector 0: Invalid argument | 09:18 |
| sakthi | 2016-06-23 14:47:40.872 40298 TRACE oslo_messaging.rpc.dispatcher Traceback (most recent call last): | 09:18 |
| sakthi | sorry: http://pastebin.com/Av375H21 | 09:19 |
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| sakthi | @pbandark: Empty volume created, but image not downloading to the volume | 09:23 |
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| vbala | sakthi, which backend driver? | 09:26 |
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| sakthi | iscsi | 09:26 |
| sakthi | Specifically due to this-> Updating volume: 0cbe9190-9516-40e3-8e86-44beb60e4b0d with {'status': 'error'} due to: ??? error_out_volume /usr/local/lib/python2.7/dist-packages/cinder/volume/flows/common.py | 09:32 |
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| sakthi | @vbala : volume_driver=cinder.volume.drivers.lvm.LVMVolumeDriver | 10:01 |
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| openstackgerrit | Vipin Balachandran proposed openstack/cinder: VMware: Refactor vmdk unit tests https://review.openstack.org/333232 | 10:28 |
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| openstackgerrit | Soffie Huang proposed openstack/cinder: FalconStor: New Cinder driver in Newton https://review.openstack.org/331579 | 10:30 |
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| openstackgerrit | Soffie Huang proposed openstack/cinder: FalconStor: New Cinder driver in Newton https://review.openstack.org/331579 | 10:33 |
| openstackgerrit | Abhishek Kekane proposed openstack/python-cinderclient: Log request-id for each api call https://review.openstack.org/315925 | 10:33 |
| openstackgerrit | Liu Qing proposed openstack/cinder: fix cinder ceph backup driver padding error https://review.openstack.org/332029 | 10:33 |
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| openstackgerrit | Gorka Eguileor proposed openstack/cinder: Add cluster job distribution https://review.openstack.org/327687 | 11:15 |
| openstackgerrit | Gorka Eguileor proposed openstack/cinder: Update Versioned Objects with Cluster object https://review.openstack.org/327686 | 11:16 |
| openstackgerrit | Gorka Eguileor proposed openstack/cinder: [WIP] Example of RPC calls moved to HA A-A https://review.openstack.org/318573 | 11:16 |
| openstackgerrit | Gorka Eguileor proposed openstack/cinder: Add cluster table and related methods https://review.openstack.org/318572 | 11:16 |
| openstackgerrit | Gorka Eguileor proposed openstack/cinder: Modify API to include cluster related operations https://review.openstack.org/327689 | 11:16 |
| openstackgerrit | Gorka Eguileor proposed openstack/cinder: Update manage with cluster related commands https://review.openstack.org/327688 | 11:16 |
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| openstackgerrit | Vipin Balachandran proposed openstack/cinder: VMware: Refactor vmdk unit tests https://review.openstack.org/333232 | 11:53 |
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| openstackgerrit | xiexs proposed openstack/cinder: Move _validate_extra_specs to cinder/utils https://review.openstack.org/333322 | 12:52 |
| openstackgerrit | xiexs proposed openstack/cinder: Add validation for type extra_specs https://review.openstack.org/333323 | 12:52 |
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| Srinu | Hi | 13:16 |
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| erlon | hemna: ping | 13:18 |
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| erlon | hemna: Hi Walter, I'm looking in this HPE driver, can you confirme that this is really like the comment is saying? | 13:21 |
| erlon | hemna: https://goo.gl/E7eeCR | 13:21 |
| erlon | hemna: it should extend the volume, but I only see self.client.copyVolume() | 13:22 |
| Srinu | hemna: hi | 13:22 |
| Srinu | hemna:I am running jenkins jobs when the build is in progress the slave went offline this is the log of the slave http://paste.openstack.org/show/521666/ | 13:23 |
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| dmixon | exit | 13:24 |
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| openstackgerrit | Dinesh Bhor proposed openstack/cinder: Make dict.keys() PY3 compatible https://review.openstack.org/332099 | 13:43 |
| openstackgerrit | Liu Qing proposed openstack/cinder: fix cinder ceph backup driver padding error https://review.openstack.org/332029 | 13:55 |
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| openstackgerrit | Merged openstack/python-cinderclient: Fix python 2,3 compatibility issue with six https://review.openstack.org/332801 | 14:13 |
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| claudiub | smcginnis: hello. You've previously +2'd the Windows iSCSI connector patch in os-brick. https://review.openstack.org/#/c/272522/ Meanwhile, it ended up in a merge conflict (a variable was renamed); solved it, also added 3 more unit tests, and that's all the differences. Can you take a look it pls? | 14:52 |
| claudiub | hemna: hello. Added a few more unit tests, as per your request on the Windows iSCSI connector patch in os-brick. Can you take a look pls? https://review.openstack.org/#/c/272522/ | 14:52 |
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| openstackgerrit | Vipin Balachandran proposed openstack/cinder: VMware: Set backing UUID in vCenter to volume UUID https://review.openstack.org/333389 | 14:57 |
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| openstackgerrit | Merged openstack/cinder: Add missing coordination=True on service start https://review.openstack.org/332925 | 15:16 |
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| openstackgerrit | Merged openstack/cinder: Capability lists in Cinder scheduler https://review.openstack.org/331258 | 15:25 |
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| openstackgerrit | Merged openstack/cinder: Updated from global requirements https://review.openstack.org/333175 | 15:25 |
| e0ne | smcginnis: hi. can we release new os-brick? it will unblock few patches including 'local attach' feature | 15:26 |
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| _alastor_ | Is ci-watch not reporting for anyone else? | 15:30 |
| _alastor_ | I'm not sure if it's just my browser being weird | 15:30 |
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| _alastor_ | http://ci-watch.tintri.com/project?project=cinder&time=24+hours | 15:31 |
| smcginnis | e0ne: Not yet. We need to still sort out the privsep stuff with grenade. | 15:31 |
| smcginnis | e0ne: Seems like we are getting close, but not quite there yet. | 15:31 |
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| e0ne | smcginnis: ok, thanks | 15:32 |
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| e0ne | smcginnis: I thought that it was fixed in privsep | 15:32 |
| e0ne | :( | 15:32 |
| smcginnis | e0ne: The issue is on upgrades. The rootwrap filters need to allow privsep to run. | 15:32 |
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| e0ne | :( | 15:33 |
| smcginnis | e0ne: But grenade tests will not allow updating that first, so Newton code running with Mitaka config fails to initialize privsep. | 15:33 |
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| e0ne | smcginnis: got it. thanks for the info | 15:33 |
| smcginnis | I think it's highlighted an issue we've always had with adding new things to rootwrap filters between upgrades. :/ | 15:33 |
| smcginnis | e0ne: Hopefully we sort that out soon. As soon as we do, I'll get a new os-brick release going. | 15:34 |
| e0ne | smcginnis: cool | 15:34 |
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| e0ne | smcginnis: doesn anyone work on grenade job for os-brick? | 15:34 |
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| smcginnis | e0ne: Not sure what you mean. Running grenade on os-brick patches? No, those aren't run. This did bring that up that we probably should. | 15:39 |
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| smcginnis | e0ne: The weird thing was the failures weren't 100% due to some timing in how the tests were set up. | 15:39 |
| e0ne | smcginnis: yes, I mean grenade for os-brick patches | 15:39 |
| smcginnis | Yeah, we probably should add that... | 15:40 |
| e0ne | smcginnis: :( | 15:40 |
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| openstackgerrit | OpenStack Proposal Bot proposed openstack/python-cinderclient: Updated from global requirements https://review.openstack.org/332361 | 15:47 |
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| scottda | dulek: Do we need to run any cinder-manage command to finish a rolling upgrade? | 15:48 |
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| geguileo | e0ne: I forgot to ping you on Tuesday when I came back :-( | 15:50 |
| geguileo | smcginnis: When you have a minute, this patch could do with a +A that lost in a rebase https://review.openstack.org/319323 | 15:51 |
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| geguileo | scottda: afaik you just need to either restart services or send SIGHUP | 15:52 |
| geguileo | scottda: Because we don't have post install mechanism yet | 15:52 |
| scottda | geguileo: Thanks. I was just looking at spec that indicated that there might be more: https://specs.openstack.org/openstack/cinder-specs/specs/liberty/rpc-object-compatibility.html | 15:53 |
| scottda | 4. Once all cinder services are upgraded, the admin executes a “cinder-manage version upgrade” to switches the current/pinned versions to the latest available versions. | 15:53 |
| scottda | But that is probably out-of-date | 15:54 |
| geguileo | scottda: That's out of date | 15:54 |
| geguileo | scottda: Instead of that we now restart the services | 15:54 |
| scottda | geguileo: Thanks. | 15:54 |
| geguileo | scottda: But we'll probably have that once we have a post upgrade mechanism | 15:54 |
| geguileo | So it's not really out of date. lol | 15:55 |
| scottda | haha...pre-date | 15:55 |
| Swanson | A core might want to take pity on this and move it through... https://review.openstack.org/#/c/318748/ | 15:56 |
| xinli | dulek: thank you very much for code review regarding patch 251989, for this comment: https://review.openstack.org/#/c/251989/22/cinder/db/api.py@607, I verified with Ryan (he left IBM / openstack) that he said: for this basically it's the way the Versioned Objects automagically expects the DB table to have the same name as the name of the VO. If we weren't to switch the name, we'd | 15:56 |
| xinli | need to add some mapping from quality_of_service_specs -> qos-specs which is another option. is this also your suggestion? | 15:56 |
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| geguileo | xinli: I think you should do the mapping | 15:59 |
| geguileo | xinli: So the naming is consistent with all other methods | 15:59 |
| geguileo | xinli: It's required for the generic get_by_id mechanism in OVO | 16:00 |
| xinli | geguileo: Yes, any suggestion where should I add the mapping ? | 16:01 |
| geguileo | xinli: It's in dulek comment: https://github.com/openstack/cinder/blob/5447efe7b5b679c60c7e3e839201bc50249ec240/cinder/db/sqlalchemy/api.py#L4742-L4748 | 16:01 |
| geguileo | xinli: You just add the SQLA model as the key and the get method as the value | 16:02 |
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| e0ne | geguileo: don't worry. I'll ping you tomorrow | 16:03 |
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| geguileo | e0ne: Ok, sorry about that | 16:04 |
| hemna | smcginnis, looks like the nova folks are arguing again for migrating all iscsi attaches to qemu direct | 16:04 |
| hemna | smh | 16:04 |
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| e0ne | geguileo: np | 16:04 |
| hemna | re: mailing list | 16:04 |
| smcginnis | hemna: Saw that. Still not clear to me what the benefit would be. | 16:04 |
| hemna | I don't understand the need to make qemu a new linux kernel | 16:04 |
| smcginnis | Especially that would outweigh having KVM being different than other hypervisors. | 16:04 |
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| smcginnis | ;) | 16:04 |
| hemna | a giant monolithic beast that re-implements everything | 16:05 |
| e0ne | :) | 16:05 |
| smcginnis | hemna: True | 16:05 |
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| geguileo | xinli: Since your OVO class has the same name as the ORM class you don't need to change the OVO to model method | 16:05 |
| hemna | I really don't see the benefit at all | 16:05 |
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| Swanson | keeps people employed. | 16:08 |
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| * hemna stirs up the pot..... | 16:13 | |
| hemna | as always | 16:13 |
| hemna | *sigh* | 16:13 |
| openstackgerrit | Yuriy Nesenenko proposed openstack/python-cinderclient: Cinder client should retry with Retry-After value https://review.openstack.org/332848 | 16:16 |
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| xinli | geguileo: the OVO class is "QualityOfServiceSpecs" defined in qos_specs.py and my ORM class name should be model.QaulityOfServices, right? now model.QualityOfServices : qos_specs_get()? | 16:32 |
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| openstackgerrit | venkata krishna proposed openstack/cinder: Refactoring Kaminario iSCSI driver https://review.openstack.org/333478 | 16:35 |
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| openstackgerrit | Szymon Wróblewski proposed openstack/cinder: Replace locks in remotefs and glusterfs backend drivers https://review.openstack.org/270240 | 16:36 |
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| nikeshm | smcginnis eharney: refactoring kaminario initialize and terminate_connection so that it can be easy to read and can be used in kaminario FC driver with minimal code changes https://review.openstack.org/#/c/333478/ | 16:42 |
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| hemna | nikeshm, and ZERO unit tests | 16:46 |
| nikeshm | hemna: it is already merged | 16:48 |
| nikeshm | just refactoring some code | 16:48 |
| nikeshm | so that in FC driver, minimum code we have to use | 16:48 |
| nikeshm | hemna: https://github.com/openstack/cinder/blob/master/cinder/tests/unit/volume/drivers/test_kaminario.py | 16:50 |
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| hemna | nikeshm, that patch clearly changes big portions of inititialize_connection and yet doesn't change any unit tests. | 16:51 |
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| hemna | that's a -1 | 16:52 |
| hemna | new functions were added | 16:53 |
| hemna | no unit tests | 16:53 |
| hemna | sorry to harp on it, but that patch needs unit tests :) | 16:53 |
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| openstackgerrit | Szymon Wróblewski proposed openstack/cinder: [WIP] Clean up RemoteFSSnapDriver https://review.openstack.org/333489 | 16:54 |
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| nikeshm | hemna: ok thanks | 16:57 |
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| rdx_matt | smcginnis: After submitting a driver for review, should I notify someone regarding the code review? (https://review.openstack.org/#/c/332032/) | 16:58 |
| hemna | rdx_matt, do you guys have CI setup yet ? | 16:59 |
| rdx_matt | hemna: Working in it. Sean has suggested that we submit the driver for review anyway to start getting feedback. | 17:00 |
| hemna | ok coolio. :) | 17:00 |
| hemna | I'm looking at it | 17:00 |
| rdx_matt | hemna: Thanks! :) | 17:01 |
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| Srinu_ | Hi | 17:01 |
| Srinu_ | I am running jenkins job while build in progress the slave went offline | 17:02 |
| Srinu_ | http://paste.openstack.org/show/521666/ | 17:02 |
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| Srinu_ | Did anyone face this issue....please help me | 17:03 |
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| patrickeast | Srinu_: might want to ask over in #openstack-infra, it is probably zuul or nodepool related | 17:05 |
| Srinu_ | Patrickeast: thank you very much because you helped me in fc passthrough | 17:06 |
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| hemna | oh the joy of Java | 17:14 |
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| Swanson | Java joy multiplication factor is 0 to 4 decimal places. | 17:31 |
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| hemna | "The domain javasucks.com is for sale. To purchase, call Afternic.com at....." | 17:32 |
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| openstackgerrit | Merged openstack/cinder: Improve DB volume check in LVM manage volume https://review.openstack.org/319323 | 17:39 |
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| erlon | hemna: hey, saw my message from earlier? | 18:18 |
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| hemna | erlon, no I didn't. | 18:29 |
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| hemna | erlon, yes, it's exactly like the comment says | 18:30 |
| hemna | there are limitations on the 3PAR that force our driver to do this, for various reasons. we have to kick off the clone and wait for it to complete | 18:31 |
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| hemna | there is a capability to do an 'online' copy on the 3PAR, but due to the way that works, we can't touch/change/delete that volume while that online copy is going on. | 18:32 |
| hemna | so, the safest way is for us to wait. | 18:32 |
| hemna | :( | 18:32 |
| hemna | sadness | 18:32 |
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| erlon | hemna: My concern is actually about the resize. I'm trying to fix the clone_from resize problem in a more generic way, from volume manager, and not relying on drivers, so I needed that the drivers only clone the volume and let the manager code to extend it if needed | 18:48 |
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| erlon | hemna: so, for what you are saying, the storage re-sizes the volume internally? | 18:49 |
| erlon | hemna: all others who do that do it in the driver | 18:50 |
| hemna | erlon, so the 'resize' happens by us creating a new volume with the correct size | 18:51 |
| hemna | then we copy the bits from the old volume into the new | 18:51 |
| hemna | https://github.com/openstack/cinder/blob/master/cinder/volume/drivers/hpe/hpe_3par_common.py#L2022-L2026 | 18:51 |
| hemna | so it's both, driver driven and happens on the array | 18:52 |
| erlon | hemna: hmm, sure, you are not cloning from other volume, are creating and copying | 18:52 |
| hemna | it's a workaround for us to make sure clone works on our array w/ different sizes | 18:53 |
| hemna | what is your plan for your generic fix ? | 18:53 |
| hemna | maybe there is a way we can change out driver to make it work with your patch | 18:54 |
| erlon | hemna: mhm, what happens if I call extend in this volume passign the same size | 18:54 |
| erlon | hemna: hold on, ill push it to gerrit | 18:54 |
| hemna | so, we don't check the size being 0 | 18:55 |
| hemna | because I think that is done already in the volume manager | 18:56 |
| openstackgerrit | Erlon R. Cruz proposed openstack/cinder: Fix create_from_volume/create_from_snapshot https://review.openstack.org/333037 | 18:56 |
| erlon | hemna: https://review.openstack.org/#/c/333037/2/cinder/volume/flows/manager/create_volume.py | 18:56 |
| hemna | well your code won't call us | 18:57 |
| hemna | if dst_size > src_size | 18:57 |
| hemna | hrmm | 18:57 |
| hemna | depends on where dst_vol.size comes from | 18:58 |
| erlon | I think it will | 18:58 |
| hemna | anyway | 18:58 |
| hemna | so, if extend_volume is called on us | 18:58 |
| erlon | because at this place the volume wasn't created yet, while the clone yes | 18:58 |
| hemna | then currently we will call our array with growVolume of size 0 | 18:58 |
| hemna | which should be a noop | 18:58 |
| hemna | *should* | 18:58 |
| hemna | :P | 18:59 |
| erlon | hemna: haha | 18:59 |
| hemna | I'd have to test it of course | 18:59 |
| hemna | but the CI checks on your patch should run on our array | 18:59 |
| hemna | so...if it works..... : | 18:59 |
| hemna | there is our answer. | 18:59 |
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| erlon | hemna: that is another problem, CIs does not cover this path yet | 19:00 |
| hemna | doh | 19:00 |
| hemna | that's bad mmmkay | 19:00 |
| erlon | I have sent a patch on tempest for that, but CIs also ony runs after is merged | 19:00 |
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| erlon | hemna: I have checked all drivers and this is VERY buggy | 19:00 |
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| hemna | not surprising | 19:01 |
| hemna | https://review.openstack.org/#/c/333037/2/cinder/volume/drivers/hpe/hpe_3par_common.py | 19:01 |
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| hemna | I'm not sure that will work for us | 19:01 |
| hemna | :( | 19:01 |
| hemna | we might have to completely rework that function | 19:02 |
| hemna | with your patch in place for our stuff to work | 19:02 |
| erlon | but, good to know it should work in your driver, that was the only one I couldn't find a way to fix to work with my patch | 19:02 |
| erlon | hemna: have to drop now | 19:03 |
| erlon | hemna: thanks for while | 19:03 |
| hemna | ok man, keep me up to date | 19:03 |
| hemna | I'd like to work with you on it | 19:03 |
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| openstackgerrit | Merged openstack/cinder: Volume manage/unmanage support for Eqlx driver https://review.openstack.org/318748 | 19:40 |
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| openstackgerrit | Jon Bernard proposed openstack/cinder: WIP: RBD: add support for volume replication https://review.openstack.org/333565 | 20:20 |
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| _alastor_ | Hey, where should I look for more information on consistency groups? policy.json appears to disallow their use by default, but updating that to the "rule:admin_or_owner" just gives me a 500 error instead | 22:00 |
| _alastor_ | I'm considering possibly implementing them, but I want to play around with an existing implementation first | 22:01 |
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| _alastor_ | nevermind. policy.json typo | 22:03 |
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| openstackgerrit | Tom Swanson proposed openstack/cinder: Dell SC: Use Live Volume for replication https://review.openstack.org/329531 | 22:53 |
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| DuncanT | _alastor_: To play with them in any real sense, you'll need a backend that ssupports them | 23:11 |
| DuncanT | _alastor_: The LVM backend lies about the support | 23:11 |
| _alastor_ | DuncanT: Yeah, I encountered that :) | 23:15 |
| _alastor_ | Unfortunately I don't have any EMC stuff laying around | 23:16 |
| DuncanT | _alastor_: It's done for testing the code paths in gate | 23:16 |
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| _alastor_ | DuncanT: Most drivers appear to just let Cinder handle it and either no-op or return a constant | 23:17 |
| DuncanT | The feature fundamentally requires backend support. Unfortunately all the backends do things differently | 23:17 |
| _alastor_ | DuncanT: I'm investigating implementing a feature we have that's sorta-kinda-like cgroups, but not really but it's the closest | 23:18 |
| DuncanT | _alastor_: What driver are you looking at adding it for? | 23:18 |
| _alastor_ | Datera | 23:18 |
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| DuncanT | Ah, I don't know much at all about your tech :-) | 23:19 |
| _alastor_ | DuncanT: We have a concept of bound templates which consist of several volumes/exports that are treated as a group | 23:19 |
| _alastor_ | DuncanT: Essentially everything you need to deploy an entire application's worth of VMs | 23:20 |
| DuncanT | But can you do a crash consistent snapshot across them? | 23:20 |
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| _alastor_ | DuncanT: But it would require that cgroups be the entry-point. Volumes wouldn't exist outside of the cgroup, but snapshots would still apply | 23:20 |
| DuncanT | That doesn't mean much to me, sorry | 23:21 |
| _alastor_ | DuncanT: Np. It's a weird concept that took some getting used to when I joined. | 23:22 |
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| _alastor_ | DuncanT: just trying to get an idea of what kind of magic I'm going to have to use to round-peg-square-hole this feature | 23:22 |
| DuncanT | _alastor_: The only bit I care about are the semantics :-) I still need to sit and write a test for it... sorting flush heavy and threaded | 23:24 |
| DuncanT | To multiple volumes... detect cases where the snap is not crash consistent | 23:24 |
| DuncanT | s/sorting/something/ | 23:24 |
| _alastor_ | DuncanT: The volumes can be/are heterogenous within the group | 23:25 |
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| _alastor_ | DuncanT: So it's more like dressing up a bunch of different volumes as a cg in order to treat them as a group | 23:26 |
| DuncanT | Yeah, but if you can't make your snaps consistent across all the volumes, then you can't match the feature | 23:27 |
| _alastor_ | DuncanT: I suppose a better name/feature would be an "application group" | 23:27 |
| DuncanT | Just doing a bunch of independent snaps is not enough | 23:27 |
| _alastor_ | DuncanT: You can snapshot the entire application group and restore the thing in its entirety or single volumes within it | 23:29 |
| DuncanT | Yes, but are those snapshots crash consistent in respect to one another? That's the important bit | 23:29 |
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| DuncanT | i.e. If there are two volumes, A and B, and I do write to A, flush A, wait, write to B, and take a snap of the group during that process, there should be no way for the second write to appear in the snap but not the first | 23:31 |
| DuncanT | This isn't just a convenience function to snap a group of volumes | 23:31 |
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| _alastor_ | DuncanT: Sorry about the delay, I was talking to the feature owner | 23:34 |
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| _alastor_ | DuncanT: He says that they are crash consistent as you've described | 23:35 |
| DuncanT | Perfect :-) | 23:35 |
| DuncanT | The rest is just API matching, annoying but not fundamentally hard | 23:35 |
| _alastor_ | DuncanT: But when you get a tempest test for that, let me know so I can run it before releasing this feature to customers :) | 23:36 |
| DuncanT | It probably won't be a tempest test, since it's long running, but yeah, I'll let you know | 23:36 |
| _alastor_ | DuncanT: Thanks | 23:36 |
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