Thursday, 2015-12-17

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openstackgerritKurt Martin proposed openstack/cinder: 3PAR: Implement un/manage snapshot support  https://review.openstack.org/25376000:10
openstackgerritKurt Martin proposed openstack/cinder: 3PAR: Implement v2 replication (unmanaged)  https://review.openstack.org/23124500:10
openstackgerritKurt Martin proposed openstack/cinder: Disable capabilities based on 3PAR licenses  https://review.openstack.org/25872800:10
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openstackgerritAnthony Lee proposed openstack/cinder: 3PAR: Implement un/manage snapshot support  https://review.openstack.org/25376000:32
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openstackgerritPatrick East proposed openstack/cinder: Add config option to enable reporting discard  https://review.openstack.org/25874701:19
openstackgerritZTE cinder2 CI proposed openstack/cinder: add zte cinder driver  https://review.openstack.org/25874801:19
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openstackgerritwanghao proposed openstack/cinder: Backup tenant attribute support  https://review.openstack.org/25837401:59
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openstackgerritPeter Wang proposed openstack/cinder: Fix migration start failure in VNX driver  https://review.openstack.org/25829402:43
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openstackgerritVincent Hou proposed openstack/cinder: Storwize: Implement v2 replication (mirror)  https://review.openstack.org/24904204:14
openstackgerritVincent Hou proposed openstack/cinder: Storwize: Implement v2 replication (split IO)  https://review.openstack.org/23738704:14
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openstackgerritMerged openstack/cinder: Check backup service before backup delete  https://review.openstack.org/24649804:28
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openstackgerritVincent Hou proposed openstack/cinder: Storwize: Implement v2 replication (mirror)  https://review.openstack.org/24904204:37
openstackgerritVincent Hou proposed openstack/cinder: Storwize: Implement v2 replication (split IO)  https://review.openstack.org/23738704:37
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openstackgerritPeter Wang proposed openstack/cinder: VNX: Replication V2 support(managed)  https://review.openstack.org/25624605:07
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openstackgerritPeter Wang proposed openstack/cinder: VNX: Replication V2 support(managed)  https://review.openstack.org/25624605:08
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openstackgerritPeter Wang proposed openstack/cinder: VNX: Replication V2 support(managed)  https://review.openstack.org/25624605:56
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openstackgerritOpenStack Proposal Bot proposed openstack/cinder: Imported Translations from Zanata  https://review.openstack.org/25882006:24
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openstackgerritVincent Hou proposed openstack/cinder: Storwize: Implement v2 replication (mirror)  https://review.openstack.org/24904206:49
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openstackgerritVincent Hou proposed openstack/cinder: Storwize: Implement v2 replication (mirror)  https://review.openstack.org/24904206:53
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openstackgerritwanghao proposed openstack/cinder-specs: Uploading volume to specific image  https://review.openstack.org/25831007:14
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openstackgerritwanghao proposed openstack/cinder: Backup tenant attribute support  https://review.openstack.org/25837407:35
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openstackgerritwanghao proposed openstack/cinder-specs: Uploading volume to specific image  https://review.openstack.org/25831008:10
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openstackgerritVincent Hou proposed openstack/cinder: Storwize: Implement v2 replication (mirror)  https://review.openstack.org/24904208:18
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openstackgerritwanghao proposed openstack/cinder: Backup tenant attribute support  https://review.openstack.org/25837408:36
GK__observing Cinder volume deleting issue08:36
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vincent_hougeguileo: I am working on the approach to optimize the source volume attachment during host assisted migration. https://review.openstack.org/#/c/250220. Please help me with your comments.08:50
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geguileovincent_hou: Will do!08:53
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openstackgerrityifan403 proposed openstack/cinder: add zte cinder driver and unit test file.  https://review.openstack.org/25888008:58
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openstackgerritTakeshi Nishikawa proposed openstack/cinder: Rebrand HP XP driver to now be HPE  https://review.openstack.org/25169509:15
openstackgerritPeter Wang proposed openstack/cinder: VNX: Replication V2 support(managed)  https://review.openstack.org/25624609:16
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openstackgerritAlessandro Pilotti proposed openstack/cinder: Replaces WMI requirement with PyMI  https://review.openstack.org/25661409:28
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openstackgerritKazumasa Nomura proposed openstack/cinder: Refactor Hitachi Block Storage Driver  https://review.openstack.org/25523909:49
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openstackgerritYuriy Nesenenko proposed openstack/cinder: Check min config requirements for rbd driver  https://review.openstack.org/25891009:57
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openstackgerritYuriy Nesenenko proposed openstack/cinder: Small refactoring in test_admin_actions.py  https://review.openstack.org/25354110:01
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openstackgerritSzymon Wr√≥blewski proposed openstack/cinder: Tooz locks  https://review.openstack.org/18353710:29
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openstackgerritYuriy Nesenenko proposed openstack/cinder: Check min config requirements for rbd driver  https://review.openstack.org/25891010:44
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openstackgerritYuriy Nesenenko proposed openstack/cinder: Check min config requirements for rbd driver  https://review.openstack.org/25891010:47
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openstackgerritVipin Balachandran proposed openstack/cinder: VMware: Add support for VVOL datastores  https://review.openstack.org/25894510:57
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openstackgerritMerged openstack/cinder: Add volume_extensions:quotas:delete to policy.json  https://review.openstack.org/25856911:02
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openstackgerritKazumasa Nomura proposed openstack/cinder: Refactor Hitachi Block Storage Driver  https://review.openstack.org/25523911:13
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openstackgerritIvan Kolodyazhny proposed openstack/cinder: Remove downgrade migrations  https://review.openstack.org/25895911:23
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openstackgerritwanghao proposed openstack/cinder: Backup tenant attribute support  https://review.openstack.org/25837411:32
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openstackgerritVipin Balachandran proposed openstack/cinder: VMware: Add support for VVOL datastores  https://review.openstack.org/25894511:34
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openstackgerritYuriy Nesenenko proposed openstack/cinder: Check min config requirements for rbd driver  https://review.openstack.org/25891011:36
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openstackgerritYuriy Nesenenko proposed openstack/cinder: Check min config requirements for rbd driver  https://review.openstack.org/25891011:42
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openstackgerritIvan Kolodyazhny proposed openstack/python-cinderclient: Do not require functional_creds.conf for functional tests  https://review.openstack.org/24593311:45
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openstackgerritHelen Walsh proposed openstack/cinder: EMC VMAX - Fix for last volume in VMAX3 storage group  https://review.openstack.org/24433111:51
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openstackgerritdongwenjuan proposed openstack/cinder-specs: Add ServiceGroup using Tooz driver  https://review.openstack.org/25896811:57
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openstackgerritIvan Kolodyazhny proposed openstack/cinder: Remove downgrade migrations  https://review.openstack.org/25895912:06
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openstackgerritShay Halsband proposed openstack/cinder: XtremIO add support for create CG from CG src  https://review.openstack.org/24554812:59
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sheeldulek:hi13:20
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openstackgerritIvan Kolodyazhny proposed openstack/cinder: test  https://review.openstack.org/25903214:11
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openstackgerritRyan Rossiter proposed openstack/cinder: Add BackupStatus enum field  https://review.openstack.org/25673714:24
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merooneyCould I get some core reviewer attention on https://review.openstack.org/#/c/254949/ ?14:29
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openstackgerritShay Halsband proposed openstack/cinder: XtremIO: fix generic glance cache with XtremIO  https://review.openstack.org/24981414:37
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smcginnisI had a tab open from a couple days ago and it made me feel nostalgic. :]14:57
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e0nesmcginnis: are you talking about gerrit?14:59
smcginnise0ne: hehe, yep14:59
e0ne:)14:59
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dulekYou can jump around the file using <j>,<k>, <{>,<}> and <Space>,<Shift>+<Space>. I'm getting more and more used to it. :)15:04
e0neI've got some issues with scrolling :(15:05
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openstackgerritAnthony Lee proposed openstack/cinder: 3PAR: Implement un/manage snapshot support  https://review.openstack.org/25376015:32
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openstackgerritMikhail Khodos proposed openstack/cinder: Re-add Nexenta driver  https://review.openstack.org/18887715:34
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openstackgerritAnthony Lee proposed openstack/cinder: LeftHand: Implement un/manage snapshot support  https://review.openstack.org/25501515:45
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openstackgerritMike Rooney proposed openstack/cinder: Add serial number to eseries ASUP payload  https://review.openstack.org/25494915:45
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openstackgerritAlex O'Rourke proposed openstack/cinder: 3PAR: Implement v2 replication (unmanaged)  https://review.openstack.org/23124516:08
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openstackgerritKurt Martin proposed openstack/cinder: 3PAR: Implement un/manage snapshot support  https://review.openstack.org/25376016:11
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openstackgerritIvan Kolodyazhny proposed openstack/cinder: Remove downgrade migrations  https://review.openstack.org/25895916:14
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openstackgerritAnthony Lee proposed openstack/os-brick: Adding a tool for querying volume paths  https://review.openstack.org/20419116:19
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-openstackstatus- NOTICE: Zuul is moving in very slow motion since roughly 13:30 UTC; the Infra team is investigating.16:41
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openstackgerritMichal Dulko proposed openstack/cinder: Add ConsistencyGroupVolumeTypeMapping table  https://review.openstack.org/24585417:14
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dulekxyang1: Hi, hopefully you won't mind I've hijacked your WIP patchset to prove the concept of live DB schema upgrades. :)17:17
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xyang1dulek: I hope you asked me about it.  I don't like to be hijacked TBH17:19
anteayaxyang1: can you join -infra for a moment?17:19
xyang1anteaya: sure17:19
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anteayathanks17:19
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openstackgerritNate Potter proposed openstack/cinder: Remove unnecessary VolumeNotFound exceptions  https://review.openstack.org/25672217:27
openstackgerritRyan Rossiter proposed openstack/cinder: Add test for checking object compatibilities  https://review.openstack.org/25912317:30
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openstackgerritMike Rooney proposed openstack/cinder: Add serial number to eseries ASUP payload  https://review.openstack.org/25494917:46
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openstackgerritDirk Mueller proposed openstack/cinder: Require a keystone v3 endpoint for project quota lookup  https://review.openstack.org/25913418:00
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openstackgerritPatrick East proposed openstack/cinder: Add config option to enable reporting discard  https://review.openstack.org/25874718:20
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openstackgerritWalter A. Boring IV (hemna) proposed openstack/os-brick: WIP: brick add extend_volume API  https://review.openstack.org/24377618:36
openstackgerritKurt Martin proposed openstack/cinder: Disable capabilities based on 3PAR licenses  https://review.openstack.org/25872818:38
openstackgerritWalter A. Boring IV (hemna) proposed openstack/cinder: Don't call remove_export with attachments left  https://review.openstack.org/25559518:38
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openstackgerritKurt Martin proposed openstack/cinder: Disable capabilities based on 3PAR licenses  https://review.openstack.org/25872818:41
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openstackgerritAbhilash Divakaran proposed openstack/cinder: Add volume driver for Tegile IntelliFlash array  https://review.openstack.org/24678719:04
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openstackgerritAlex O'Rourke proposed openstack/cinder: 3PAR: Implement v2 replication (unmanaged)  https://review.openstack.org/23124519:14
openstackgerritAnthony Lee proposed openstack/cinder: 3PAR: Implement un/manage snapshot support  https://review.openstack.org/25376019:15
openstackgerritAlex O'Rourke proposed openstack/cinder: 3PAR: Implement v2 replication (unmanaged)  https://review.openstack.org/23124519:16
openstackgerritAbhilash Divakaran proposed openstack/cinder: Add volume driver for Tegile IntelliFlash array  https://review.openstack.org/24678719:20
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openstackgerritAnthony Lee proposed openstack/cinder: 3PAR: Implement un/manage snapshot support  https://review.openstack.org/25376019:24
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smcginnisjgriffith, jungleboyj, thingee, eharney, DuncanT: Prep for a stable release when you have a moment...19:29
smcginnisjgriffith, jungleboyj, thingee, eharney, DuncanT: sean.mcginnis@gmail.com19:29
smcginnisDoh!19:29
smcginnisStoopid copy.19:29
smcginnisjgriffith, jungleboyj, thingee, eharney, DuncanT: https://review.openstack.org/25915919:30
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openstackgerritJay Bryant proposed openstack/cinder: Remove the deprecated ibmnas driver  https://review.openstack.org/25916219:33
jungleboyjsmcginnis: I am here now.19:33
smcginnisjungleboyj: And removing drivers! Nice! :)19:34
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smcginnisGotta run. Wife's birthday and she wants to go to an exhibit. bbl19:35
jungleboyjsmcginnis: Ok.  Yeah, that one can be removed.19:35
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ildikovhemnafk: hi. could you please ping me when you're back? tnx :)19:52
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dulekxyang1: Ah, I'm sorry. I just wanted to try to get this rolling somehow, it's been a month without any update. You want me to step down from this patch or move it to another review?19:55
xyang1dulek: that's ok.  just leave it there and I'll take a look later19:56
dulekxyang1: Thanks.19:57
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hemnaildikov, hey20:02
ildikovhemna: hey. I got some review comments from John, so I have a few questions now :)20:03
hemnaok20:03
ildikovhemna: the first is the first comment here: https://review.openstack.org/#/c/193135/36/nova/virt/block_device.py20:04
hemnaok checking20:04
ildikovI saw that the initialize_connection is kind of a direct call to the cinderclient20:04
ildikovI started to check the client code, but then I ended up the thought that it's prolly easier if I ask you :)20:04
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hemnaok20:05
hemnaso, why are we setting multiattach=True there?20:05
hemnaThe default is False20:05
mtreinishhemna: so I just pushed a new os-testr release which includes all the color patches. Want to give it another try?20:07
hemnamtreinish, sure in a bit20:08
hemna:)20:08
mtreinishIt works for me when I run ostestr --color manually, but from tox the color doesn't work20:08
ildikovhemna: it's used here: https://review.openstack.org/#/c/193135/36/nova/virt/libvirt/volume/volume.py20:08
hemnahrmm20:08
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hemnaso I presume that cons.shareable is used elsewhere?20:09
hemnaconf20:09
hemnacon.shareable20:10
hemnabah20:10
hemnamac chat client!20:10
hemnaconf.shareable20:10
ildikovyeah, it's used for generating the xml for libvirt20:12
hemnado we not have access to the volume object when that happens ?20:12
hemnathe volume object has the flag itself.20:12
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hemnathe connection_info comes back from cinder's initialize_connection and it doesn't contain that flag.  No cinder driver will populate that value20:13
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ildikovthat file does not look like one that would have access to the volume info20:14
ildikovI assumed that we cannot get the flag from the connection_info from Cinder, but wanted to double check with you20:15
ildikovI will reply to that comment and ask John for options20:15
hemnayah, cinder itself doesn't add that flag in the return of initialize_connection20:15
ildikovok, no worries we will figure something out20:16
hemnaok20:16
hemnathe fun of nova code20:17
ildikovthe other question belongs to the bugfix patch20:17
hemnaok20:17
ildikovit's REALLY not fun...20:17
ildikovso the question is here: https://review.openstack.org/#/c/256273/15/nova/volume/cinder.py20:17
ildikovI had it in mind too, but for me it was a low prio one compared to the rest of the code... :)20:17
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ildikovthe not fun comment I meant on the Nova code obviously20:18
hemnaok20:18
hemnaI think the host has been part of that api call for a long time...20:18
hemnalet me check20:18
ildikovyou mean on Cinder side it exists already we just did not use it?20:19
hemnacorrect20:20
hemnait's been around since Havana20:20
ildikovoh, awesome20:21
ildikov... thanks much for checking20:21
hemnaugh20:22
hemnalive migration20:22
hemna...pain20:22
ntpttrIf anyone has a moment I'm having some difficulty with an error output by gate-tempest-dsvm-full-ceph on this patch https://review.openstack.org/#/c/230617/ - so I've added the is_public as well as protected options to the upload-to-image method which are both True|False, but tempest is throwing an error on just is_public saying "Unable to set 'is_public' to 'False'. Reason: False is not of type u'string'\n\nFailed validating u'type'20:22
ntpttrSorry for the wall of text there >.<20:23
ildikovhemna: do you mean it from the host param PoV or this is what reminded you?20:23
hemnayah20:23
hemnaI'm checking the nova live migration code20:24
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ildikovI couldn't get there yet to check specifics like that20:25
hemnaso during live migration nova attaches a volume to the new vm after it's up20:26
hemnathen tears down the connection on the original compute host20:26
hemnacinder will need that hostname updated20:26
hemna:(20:26
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ildikovok, this is what I thought you will point out20:26
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openstackgerritHelen Walsh proposed openstack/cinder: EMC VMAX - Replacing deprecated API EMCGetTargetEndpoints  https://review.openstack.org/24432820:27
ildikovbut the instance gets back the same volume it had before the migration or another one?20:28
openstackgerritHelen Walsh proposed openstack/cinder: Error handling for invalid SLO/Workload combo  https://review.openstack.org/24383720:28
hemnait's the same volume20:29
hemnaor should be20:29
hemnahead is spinning over the nova code20:30
ildikovbut I guess it's not attached in the same way as originally20:30
hemnaI think nova circumvents some of the cinder APIs to do the live migration20:30
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hemnaas it actually does a backdoor to attach the volume to the new n-cpu host before it disconnects it from the original n-cpu host.20:31
hemnakinda like a quick multi attach20:31
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ildikovsounds like pain20:32
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hemnayah I'm not sure I get this20:34
hemnaI don't understand how nova even sees the volume on the destination host20:34
hemnaduring live migration20:34
hemnait doesn't look like nova ever calls initialize_connection20:34
* hemna is confused20:34
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hemnahttps://github.com/openstack/nova/blob/master/nova/virt/libvirt/driver.py#L6294-L630620:36
hemnawhere does that connection_info come from ?20:36
hemnaonly way that works is if Cinder is called with initialize_connection for the new destination n-cpu host.20:37
ildikovone sec, I'm running tests so my laptop is getting slow... :)20:37
hemnaok20:37
ildikovI assume the connection_info contains what Nova needs, doesn't it?20:38
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hemnawell20:40
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hemnaso a few things20:40
hemnain order for a volume to ever be seen on a host, cinder has to get called20:40
hemnawith the initiator information that is (collected by os-brick) on that new c-pu host.20:41
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hemnaif that doesn't happen, then that host will never see the volume20:41
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hemnaand I can't see where nova is calling cinder's initialize_connection to fetch the target information (connection_info) for that volume for that host.20:42
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ildikovthere's a series of connect_volume calls starting here: https://github.com/openstack/nova/blob/master/nova/virt/libvirt/driver.py#L106120:42
hemnayup20:42
hemnaso by then, it's too late20:42
hemnathat call is calling os-brick to discover the volume paths on the host.20:42
ildikovis the connection_info specific for the host or that contains the target info?20:42
hemnathe connection_info is the volume's target information which will be specific to that host.20:43
ildikovas it gets the connection info from the BDM20:43
hemnatake for example iSCSI20:43
hemnathe iSCSI iqn will be different on the new n-cpu host20:43
hemnaand cinder backends will need that iqn in order to export the target to that host.20:43
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hemnaall of which has to happen prior to calling libvirt.driver._connect_volume()20:44
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hemnashite20:45
hemnaI don't see how this works at all20:45
hemna:P20:45
hemnabah20:45
hemnaso for the live migration case20:45
hemnawe have to figure out20:45
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hemna1) how nova is getting the correct cinder connection_info on the new host20:45
hemna2) and how to tell cinder to update it's host for the attachment20:46
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ildikovunfortunately it was a while ago when I last played with iSCSI, so I don't remember the exact steps how it works20:46
hemnaor I think live migration for lvm won't work20:46
hemnaI have to be missing something20:47
ildikovyou mean it does not work atm because of the connection_info?20:47
hemnadunno20:47
hemnayah even w/o multi attach20:47
hemnaI'm confused how the volume shows up on the new n-cpu host20:47
wNi only saw the last few messages, but multiple computes can attach to the iscsi target20:47
hemnawN only if the cinder backend has exported the target to both hosts20:47
hemnaand I don't see where nova is calling cinder to ask it to export to the destination n-cpu node.20:48
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wNdoes it set an acl on the target?20:48
hemnaas far as I can tell20:49
hemnahttps://github.com/openstack/nova/blob/master/nova/virt/libvirt/driver.py#L6294-L630620:49
hemnathat's all nova is doing during pre_live_migration20:49
hemnaand self._connect_volume is just to discover the volume showing up on the host.20:49
hemnathe connection_info is being pulled out of the bdm20:49
hemnawhich I think is the connection_info from the original attach to the source host20:50
wNyou're right. my env has a 1-way auth acl20:50
hemnawhich can/will be incorrect for the destination n-cpu host.20:50
hemna*sigh*20:50
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ildikovyeah, when it calls the pre_live... it adds the block_device_info from the original instance/attach20:51
hemnayup, which will be incorrect20:51
hemna:(20:51
ildikovis it tested anywhere?20:52
hemnait's supposed to be tested20:52
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hemnaI think there was a live migration test put into the check/gate at some point20:52
hemnaI haven't kept track of it though20:52
hemnaso that's one problem that has almost nothing to do with multi attach20:53
hemnabut20:53
hemnaignoring that problem for the moment20:53
hemnawe need a way of telling cinder that the attachment host has changed20:53
ildikovhmm, I will not promise I will get there this year to check whether there is a test or not20:53
hemnaand I don't think we have an API for that :(!!20:53
ildikovI assume Cinder attach is not called again when the volume is attached for the second time20:54
hemnait's currently not from nova's side afaik20:54
hemnathat's what led me to find the https://github.com/openstack/nova/blob/master/nova/virt/libvirt/driver.py#L6294-L6306  code20:54
ildikovand now only the initialize_connenction is missing, right?20:54
hemnait just calls os-brick to discover the volumes and then it's done.20:54
hemnayah20:55
hemnawell a few things really20:55
hemnafirst nova needs the initiator connector information from the destination n-cpu host20:55
hemnaand then call cinder's initialize_connection20:55
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ildikovand all this before the code you linked20:56
hemnayup20:57
hemnabasically exactly like this20:57
hemnahttps://github.com/openstack/nova/blob/master/nova/virt/libvirt/driver.py#L6445-L645320:57
hemnawe added that to fix part of the live migration issues a release or so ago20:57
hemnathat's at disconnect time.20:57
hemnaafter the vm is back up on the destination host, the source side gets cleaned up20:58
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hemnacrud20:59
hemnaso.......yah.  I'm stuck :(20:59
openstackgerritHelen Walsh proposed openstack/cinder: EMC VMAX - VMAX driver failing to remove zones  https://review.openstack.org/24493320:59
hemnawe need to ping mriedem about this maybe20:59
hemnaor someone that knows the live migration code in nova better than I.20:59
hemnahttps://github.com/openstack/nova/blob/master/nova/virt/libvirt/driver.py#L630320:59
hemnaI don't understand how that is the correct info.21:00
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ildikovin case of the post call, I guess it's the block_device_info that specifies the source21:03
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hemnawe'll have to touch base with the nova guys21:05
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hemnaI'll have to see if I can figure something out with the host name update in cinder's attachment :(21:06
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ildikovcan we say that live migration and multiattach are not supported together as a first step?21:07
hemnapossibly21:07
hemnanot ideal21:07
ildikovsurely not, but the non-priority code freeze is Jan 17...21:08
ildikovand it's Christmas in a week21:08
* hemna wonders if we can just call attach again21:08
ildikovI wondered that too TBH21:08
hemnaI'm going through the cinder code to see if there is anything that would fail21:08
ildikovI have a comment from John that we don't want to call attach again for live migration, it would prolly worth to ask why21:09
hemnaso21:09
hemnaif the volume is already 'in-use'21:10
hemnaand the volume is not multi attach21:10
hemnait will fail21:10
hemnait will reply with InvalidVolume21:10
hemnaVolume is already attached21:10
hemnawe'd have to change the logic in the cinder manager21:11
jgriffithI saw my name21:11
ildikovI guess it's not an option to detach first21:11
hemnato see if there is an existing attachment21:11
hemnaand then just update it21:11
hemnaelse InvalidVolume21:11
hemnabut nova would have to call attach, and it doesn't now.21:11
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ildikovthis change sounds like one that would need an upgrade path21:12
hemnawell nova wouldn't be able to do this against Liberty or <21:12
hemna:(21:12
hemnait would fail for sure21:12
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hemnaso I don't know what to do21:14
hemnaI'm stuck basically21:14
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ildikovis it only for lvm?21:16
hemnawell I think we'll have similar issues with other cinder drivers that do the same as lvm21:16
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jgriffithlvm still works fine in Liberty last time I checked21:17
hemnayah it does21:17
hemnajgriffith, this is multiattach21:17
hemnaI'm down a rathole21:17
jgriffithhemna: oh... that21:17
jgriffithhemna: say hello to the Rabbit21:17
ildikovI guess the choices here to no multiattach or not together with live migration, right?21:17
hemnait's multiple issues now it seems21:17
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hemnahttps://review.openstack.org/#/c/25559521:18
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hemnathat guy is my attempt at fixing lvm multiattach21:18
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hemnaas well as other cinder drivers that do something similar, which I believe is almost every driver21:18
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hemnamultiple vms on a single host have an attach to the volume.21:19
jgriffithhemna: wait... are you trying to share a target?21:19
hemnasay you have 4 attaches of the same volume to vms on the same n-cpu host.21:19
openstackgerritKurt Martin proposed openstack/cinder: Disable capabilities based on 3PAR licenses  https://review.openstack.org/25872821:20
hemnaw/o that patch, the first detach removes the target to that host.  the other 3 vms on that host, just lost the volume.21:20
hemnaas there is only 1 target exported to the host.21:20
jgriffithhemna: remember way back I mentioned the idea of a list of connections that you could append/pop21:20
hemnawell, we have that list of connections21:21
jgriffithhemna: I think that would solve that problem for you21:21
hemnait's the volume_attachment table21:21
hemnathat tracks every attachment21:21
hemnathe problem is nova isn't sending the host along with it.21:21
jgriffithhemna: because you could easily check and see if there's an existing attachment still in the list before target delete21:21
jgriffithhemna: ?21:22
hemnaI gave ildikov a patch for nova that updates the nova code to send the host along with the attach call, which saves it into the db.21:22
hemnathat's exactly why my patch does21:22
hemnahttps://review.openstack.org/#/c/25559521:22
hemnathat one21:22
hemnait checks to see how many attaches are against a single host.21:22
ildikovhttps://review.openstack.org/#/c/25627321:22
hemnaif you are detaching, it doesn't call remove_export if there are attachments left.21:22
hemnaleaving the target exported and all is ok.21:23
hemnaso, in the scenario where you are just doing normal attaches and detaches, with multi attach, it works21:23
hemnathe problem is live migration21:23
hemnanova doesn't call initialize_connection, nor does it call attach for the new compute host21:24
hemnaso the host entry in the attachment for cinder will be the original compute host after live migration is complete21:24
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hemna(my rathole)21:25
hemnaI hope that makes sense21:25
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hemnahttps://github.com/openstack/nova/blob/master/nova/virt/libvirt/driver.py#L6294-L630621:26
hemnathat's nova doing a discover volume on the destination host21:26
hemnanever calls cinder21:26
hemnaI don't know how that works21:27
hemnabut it seems to21:27
hemnaand it doesn't call cinder attach to update21:27
hemnaI kinda think it should21:27
hemnabut cinder's attach bails as soon as it detects the volume is 'in-use' (for non multi attach capable volume)21:27
hemnawe need cinder to simply update the attachment record that already exists with the new information (currently only host needs an update)21:28
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ildikovI'm thinking, but have no good solution in mind :(21:30
hemnaildikov, yah21:30
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hemnaI think even updating cinder manager attach_volume to update the record, won't work for Nova21:30
hemnabecause of Liberty and <, not having that ability.21:31
ildikovI remember some migration related discussions earlier, bu tcannot recall the details and he outcome21:31
hemnaso.......21:31
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hemnamaybe drinking is the only solution21:31
ildikovyeah, no backward compatible way it seems21:31
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ildikovisn't there a way to identify which Cinder version Nova is talking to and do things accordingly?21:33
hemnait wouldn't be hard to update the cinder volume manager to cope w/ an 'update' attach_volume call21:33
hemnathat's easy21:33
hemnaildikov, well the issue is that the Cinder API has the hostname as part of the attach call21:34
hemnaand has had it for ages21:34
hemnanova just has never sent it.21:34
hemnahrmm21:34
ildikovbut the issue here is to call an update which does not exist in Cinder atm21:34
hemnahmm21:35
ildikovbut well, multiattach will not work properly with Liberty Cinder anyway21:35
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ildikovI mean without your Cinder side fix the detach will not work21:35
hemnaI think we have the host name in the connector21:35
hemnathat gets passed into initialize_connection21:35
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hemnathe problem is, we don't have instance_uuid21:36
hemnanor attachment_id21:36
ildikovyeah, I just wanted to ask, whether you have it21:36
ildikovthe initialize_connection is just to connect the host, right?21:37
hemnait's to export a target to a host, and return the target connection_info21:37
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ildikovyeap, I meant something like this21:38
hemnaso Cinder has had multi attach support for a while21:39
hemnabut it's never been called21:39
hemnabecause nova has never supported it21:39
* hemna wonders if we can tweak other stuff on cinder side to require the host21:40
* ildikov is pessimistic on this one :(21:41
openstackgerritNate Potter proposed openstack/cinder: Remove unnecessary VolumeNotFound exceptions  https://review.openstack.org/25672221:42
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ildikovbasicly we never told Cinder that the instance is moved and now we would like to in a way to not break it21:42
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ildikovwe can do it incrementally, I mean add the Cinder part now and Nova part in the next cycle and until that point no live migration wih multi attached volumes21:44
ildikovhow is it detached today? identifying the volume by id and then remove the target just simply?21:45
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SwansonLooking at stats["replication_type"] = ['async', 'sync'...] in the replication doc.  This doesn't actually work, right?21:52
jgriffithpatrickeast: ping21:56
openstackgerritHelen Walsh proposed openstack/cinder: EMC VMAX - Changing PercentSynced to CopyState in isSynched  https://review.openstack.org/24699221:56
Swansonjgriffith: ^^^  (I think we talked about this before.)21:56
patrickeastjgriffith: hey21:56
jgriffithpatrickeast: hey dude!21:56
jgriffithpatrickeast: WRT to the stuff hemna is working on...21:56
jgriffithpatrickeast: Pure is actually an interesting case on the live-migration I was thinking21:57
jgriffithpatrickeast: because you need the connection info to build the target if IRC21:57
jgriffithpatrickeast: ie for the credentials21:57
patrickeastjgriffith: yep21:57
jgriffithadding initiator iqn21:57
* patrickeast catching up on the backscroll21:57
jgriffithpatrickeast: so IIRC you don't have a problem with live-migration21:57
openstackgerritHelen Walsh proposed openstack/cinder: EMC VMAX - Extend Volume for VMAX3  https://review.openstack.org/24894121:58
jgriffithpatrickeast: which would indicate that "somewhere" there's a call being made back in to Cinder21:58
* jgriffith is far too lazy to deploy that setup and test it again :)21:58
jgriffithpatrickeast: and following Nova code is... well...21:58
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patrickeastjgriffith: haha yea, its not exactly straight forward to trace through21:59
openstackgerritMerged openstack/cinder: Change the format of some inconsistent docstring  https://review.openstack.org/25839322:00
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openstackgerritMerged openstack/cinder: Pass volume_id in request_spec for manage_existing  https://review.openstack.org/25846022:05
openstackgerritMerged openstack/python-cinderclient: Drop py33 support  https://review.openstack.org/25769922:06
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kfox1111the ha guide currently says to put cinder api active/passive. I thought that was only for cinder-volume. which is it?22:07
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smcginnisHey, just info in case something goes south - my patch went through to stop capping devstack on Cinder v1.22:23
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smcginnisSo if anyone sees anything odd, let me know ASAP.22:23
smcginniskfox1111: API should be fine A/A as far as I remember, but maybe someone who actually has tried it can confirm.22:23
kfox1111k. thx.22:24
smcginnisCorrect to above: s/went through/was approved and will be merged soon/22:25
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openstackgerritHelen Walsh proposed openstack/cinder: EMC VMAX - Incorrect storage group selected on an VMAX3 attach  https://review.openstack.org/25044322:28
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e0nesmcginnis: if I understood it correctly - nothin wiill change, we still have anabled v1 api in cinder by default22:41
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ildikovhemna: thanks for the comments on the patches22:43
hemnaildikov, sure22:43
hemnasorry I couldn't figure something out yet22:43
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hemnaI'm at a loss22:43
hemnaI can't figure out how live migration works at all really22:43
ildikovhemna: I need to get some sleep now, but will try to think about the live migration while fixing the millions of other nits22:43
hemnaok22:44
hemnaI'm surprised you are up this late!22:44
ildikovlong running tests22:44
ildikovit's so annoying to wake up to a pep8 error or smth dumb in the unit tests on the gate so I run what I can locally :)22:45
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hemnahehe22:45
hemnaildikov, I hate when that happens.....22:46
ildikovBTW, when will you go on PTO?22:46
hemnaoh yah...crap I should have ran tox -epep822:46
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hemnaI'm working Mon and Tuesday next week22:46
hemnathen I'm off until the 4th22:46
ildikovok, great, I will try to collect all my dumb questions by next Tue then22:46
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hemnaok :)22:47
ildikovthanks again, have a nice day :)22:47
ildikovlaters22:47
hemnano problemo!22:47
kmartinsmcginnis, I have a new driver BP https://blueprints.launchpad.net/cinder/+spec/3par-license-check when you have time.22:52
openstackgerritHelen Walsh proposed openstack/cinder: EMC VMAX - _remove_last_vol_and_delete_sg not being called for V3  https://review.openstack.org/25206622:52
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openstackgerritAnthony Lee proposed openstack/cinder: 3PAR: Implement un/manage snapshot support  https://review.openstack.org/25376023:24
openstackgerritAnthony Lee proposed openstack/cinder: 3PAR: Implement un/manage snapshot support  https://review.openstack.org/25376023:26
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openstackgerritPatrick East proposed openstack/cinder: Fix delete_snapshot error case in Pure driver  https://review.openstack.org/21794023:35
openstackgerritKurt Martin proposed openstack/cinder: Disable capabilities based on 3PAR licenses  https://review.openstack.org/25872823:36
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