Wednesday, 2015-12-02

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hemnamtanino, ping00:02
mtaninohemna: pong00:02
hemnamtanino, hey, so I'm just poking around00:02
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hemnamtanino, noticed you authored the nova/virt/libvirt/storage/lvm.py00:02
mtaninohemna: ah, I fixed it if I remember correctly00:03
hemnaI presume that's nova's code for creating local lvm volumes for VMs00:03
hemnaat least it seems to be00:03
mtaninohemna: Yes, I think so.00:04
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hemnaso we also have cinder/brick/local_dev/lvm.py00:04
mtaninoThat's code is for ephemeral disk of Nova.00:04
hemnawhich seems to do a lot of the same stuff00:05
hemnaand looks a bit more feature rich from what I can tell00:05
mtaninoyes, so it is better to merge these stuffs.00:05
hemnado you think that makes sense to migrate into brick and have nova and cinder share that ?00:05
hemnathat was one of the original goals of 'brick' as we discussed it way back in Havana00:05
hemnaI haven't looked at this stuff in detail much until today00:06
mtaninohemna: I think it's make sense. Maintaining duplicate code is costful,00:06
hemnacinder's lvm driver uses the the cinder/brick/local_dev/ code to do work00:06
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hemnayah, I'd rather see bug fixes for lvm related volumes get seen/used by nova00:07
mtaninoso do we try to move lvm code into Brick?00:07
hemnathat's what I'm thinking00:07
hemnait would need a few more methods00:07
mtaninoI see.00:07
hemnathe nova code has some helper functions to list volumes, get size etc.00:07
hemnathat the cinder local_dev doesnt'00:08
hemnathere is also a concept of clearing the volume in nova before deleting it. (writing zero's to it)00:08
hemnaquite a bit of differences between how cinder does delete and nova00:09
mtaninoso, like a LVM library is fine for both Cinder and nova00:09
hemnaI like how the cinder local_dev/ is written00:09
hemnaI think jgriffith did almost all of it.00:09
hemnaeharney as well looks like.00:10
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hemnaI don't think it would be too hard to do actually,.00:11
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mtaninoYes, I think it can be done00:13
hemnaok, maybe I'll throw together a poc00:13
mtaninoI see. It's nice.00:14
openstackgerritMerged openstack/cinder: Cleanup orphaned code in sqlalchemy API
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openstackgerritAlex O'Rourke proposed openstack/cinder: 3PAR: Implement v2 replication (managed)
openstackgerritAlex O'Rourke proposed openstack/cinder: 3PAR: Implement v2 replication (unmanaged)
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DuncanTIs the cinder dashboard link (00:26
DuncanTeedback=NOT+label%3ACode%252DReview%3E%3D2+NOT+label%3ACode%252DReview%3C%3D%252D1+limit%3A50&Wayward+Changes+%28Changes+with+no+code+review+in+the+last+2days%29=NOT+label%3ACode%252DReview%3C%3D2+age%3A2d ) broken for everybody, or just me?00:26
DuncanT(link at the bottom of )00:26
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mtaninoDuncanT: ping,00:28
DuncanTmtanino: Hi00:28
mtaninoDuncanT: Hi, thank you for the comennt on
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mtaninoDuncanT: I'm thinking what kind of approach is best way for Nova boot volume case.00:29
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DuncanTmtanino: Ah yes. An interesting idea, I'm just not sure it solves enough of the whole problem to be the right solution00:29
openstackgerritAlex O'Rourke proposed openstack/cinder: 3PAR: Implement v2 replication (managed)
openstackgerritAlex O'Rourke proposed openstack/cinder: 3PAR: Implement v2 replication (unmanaged)
DuncanTmtanino: Am I right in thinking that none boot-volumes will have exactly the same issue?00:30
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mtaninoDuncanT: If user don't know the relation between volume_type and hypervisor, I think it happnes.00:31
hemnaDuncanT, the review inbox url ?00:31
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DuncanT and yes, the review inbox00:32
hemnaDuncanT, works for me00:32
hemnait's my 'home page' in chrome00:32
mtaninoDuncanT: even if it is not boot from volume case.00:32
DuncanThemna: Ok, thanks, must be something weird I've done00:32
DuncanThemna: I upgraded a few crap block extensions, might eb that00:33
DuncanTmtanino: So the solution is to set up suitable volume types - none boot volumes are just as problematic as boot volumes. Or just fix all the backends to work everywhere, which would be even better00:34
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mtaninoDuncanT: so volume_type kvm.SSD, VMware.SSD or etc is one of solution which you mentioned00:35
mtaninoDuncanT: I think VMware backend or Windows backend can't support everywhere00:35
DuncanTmtanino: So an operator with a hetrogenious cloud should seriously consider not using either of those backends... and if they do then they'll need appropriate types00:36
mtaninoDuncanT: We have a issue boot from volume issue using KVM and VMware multihypervisor environment.00:37
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mtaninoDuncanT: and Cinder multi backend00:37
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DuncanTmtanino: So create a VMware-only volume type - you'll need it for none boot-from-volumes anyway00:38
mtaninoDuncanT: yes, and If nova can specify volume type during boot from volume, problem is not happen.00:39
mtaninoDuncanT: Should user know which volume type can be applied to specific hypervisor?00:39
DuncanTmtanino: The user is the only one who can know in the general case, and it changes over time, e.g. some but not all hypervisors have gained native ceph support00:40
DuncanTmtanino: Where 'user' means 'operator' just to be clear00:41
mtaninoDuncanT: not an operator. Real end user of cloud.00:41
mtaninoDuncanT: in my case.00:41
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DuncanTmtanino: They'll have to know, since there's no way of hinting it for a none boot-from-volume volume even if we add the code in your spec. The cloud operator should add it to the description of the type if it is significant. In general I'd suggest that you want to pick a universal backend for most clouds, unless you have fairly skilled users or a weirrd00:42
DuncanTrequirements set00:42
mtaninoDuncanT: Yes, I thought at first, then proposed this.
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mtaninoDuncanT: patch set 4 is approach using volume type.00:44
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DuncanTmtanino: Yes, that (patch set 4) looks like the right solution to the problem, and is useful for other general volume type uses, like picking an SSD type as boot volume00:47
mtaninoDuncanT: thank you for the comment.00:47
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mtaninoDuncanT: I should think that approach again.00:48
DuncanTmtanino: You're welcome. Please ping me again if you have any questions or if nova hate taht idea - I'm happy to talk to nova devs about it if needed00:48
mtaninoDuncanT: It' very helpful. Thank you00:49
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tbarronDuncanT: thanks for the comment on
tbarroneharney: ^^^^^01:08
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tbarronDuncanT, eharney, npotter: my role on this one is mostly instigator :-)01:10
tbarronwe clearly haven't closed all the race windows here and it prob. isn't fair to put closing them all on npotter's fix01:10
tbarronI'm just trying to figure the best way forward beyond that fix, as this race is one of many.01:11
DuncanTtbarron: My argument here would be that the service might be down momentarily and so the correct behaviour would be to leave the delete request in the queue to be dealt with later, like we do for volume requests, with the backup in the deleting state01:11
DuncanTtbarron: Unless I'm miss-understanding the issue01:11
tbarroncompare and swap on DB state within the api itself seems to be the way we want to go.01:12
tbarronbut eharney is pointing to potential races when we cast out, and I dunno if that has been thought through.01:12
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tbarronDuncanT: your argument may well be sound, I'm just digesting, learning, and very interested.01:13
tbarronThese small window races will be more problematic with scale-out backup service, and with active-active volume service.01:13
DuncanTtbarron: I don't think returning an error to the user if the service is down is the right thing to do - put the backup in deleting in the api, fire the work into the queue and forget it. Sure the backup will sit in deleting until the service comes back up, but who cares?01:14
DuncanTtbarron: I'm not sure I see the race01:14
tbarronDuncanT: so you are -1 on the npotter fix in the first place?  If one endorses the fix, then there are races.01:15
DuncanTtbarron: I might be missing something, please don't discount that, it's late here01:15
tbarronDuncanT: well, I thought it was late here on the east coast of the US :-), but then I go to bed and get up early.01:16
openstackgerritAtsushi SAKAI proposed openstack/python-cinderclient: Fix comma location in comment
tbarronDuncanT: we should probably pick this up sometime tomorrow when you've had lunch and eharney and npotter are online.01:16
DuncanTtbarron: Fine by me. It is late enough here to count as early, but I was making progress on stuff so decided to carry on01:17
tbarronDuncanT: :-)01:17
DuncanTNo doubt I'll regret this in the morning01:17
tbarronDuncanT: in my expeience the best work is done in the wee hours, either late or early.01:18
tbarronDuncanT: but get some sleep.  I'm interested in what you'll say when we return to the subject.01:18
DuncanTtbarron: I find it is a different state of mind - if I can't fix it during the day, sometimes early or late provides a new insight01:19
tbarronDuncanT: completely agree. The business day is all just dealing with meetings, people, etc.01:19
DuncanTtbarron: Sometimes I look at the code I write late at night again in the cold light of day and burn the hard drive to hdie the evidence....01:19
tbarronand sometimes you say, well, there was something here!01:20
tbarronttyl, I'm going afk for a while.  Get some sleep!01:21
smcginnishemnafk: Not still around, are you?01:22
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smcginnisDuncanT: bswartz had an issue with the dashboard last week IIRC.01:26
smcginnisDuncanT: Works fine for me.01:26
smcginnisDuncanT: I can't remember how he got around it, but maybe try FF vs Chrome or something.01:27
smcginnisDuncanT: And make sure you're logged in too.01:27
DuncanTsmcginnis: It works for me under chrome but not firefox01:27
smcginnisDuncanT: Cool. At least it works somewhere. :)01:27
smcginnisDuncanT: Maybe when Ben's around you can ping him on how he fixed it.01:28
smcginnisDuncanT: Isn't it pretty late there?01:28
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DuncanTsmcginnis: Yeah, I will call it a night shortly. Not pulled a late night for a while, and it seems to have been productive01:29
smcginnisDuncanT: Awesome! It's a good feeling. :)01:30
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openstackgerritMerged openstack/cinder: xio: fix regression in authentication
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openstackgerritwanghao proposed openstack/python-cinderclient: support for snapshot management
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openstackgerritMerged openstack/cinder: Add Mitaka-1 release notes
openstackgerritMerged openstack/cinder: Add retype in lvm driver
openstackgerritMerged openstack/cinder: Sheepdog: Optimization of error handling
openstackgerritMerged openstack/cinder: Add some missing fields to Volume object
openstackgerritMerged openstack/cinder: EMC VMAX - Change naming convention for MV and SG for FAST
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openstackgerritCedric Zhuang proposed openstack/cinder: VNX: Get volume type from location throws error
openstackgerritLisaLi proposed openstack/cinder: Delete unused codes in rbd.retype
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lixiaoy1DuncanT: ping. Could you help to review the retype spec
lixiaoy1DuncanT: and plus scaling backup spec
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openstackgerritLisaLi proposed openstack/cinder: Update retype limitation in volume/api
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openstackgerritSean McGinnis proposed openstack/cinder: Remove deprecated LVM ISCSI and ISER Drivers
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wanghaosmcginnis: ping03:45
openstackgerritLisaLi proposed openstack/cinder: Cleanup in backup reset status
wanghaosmcginnis: hi Sean,  Could you help me to review query volume glance metadata spec:
wanghaosmcginnis: I have updated this for your comment.03:48
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openstackgerritShu Muto proposed openstack/python-cinderclient: Delete python bytecode before every test run
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openstackgerritVincent Hou proposed openstack/cinder: Storwize: Implement v2 replication (mirror)
openstackgerritVincent Hou proposed openstack/cinder: Storwize: Implement v2 replication (split IO)
openstackgerritVincent Hou proposed openstack/cinder: Storwize: Implement v2 replication (mirror)
openstackgerritVincent Hou proposed openstack/cinder: Storwize: Implement v2 replication (split IO)
openstackgerritxing-yang proposed openstack/cinder: Add a GateDriver
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openstackgerritMerged openstack/cinder: Fix the bug of can't get the desired image info
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openstackgerritManjeet Singh Bhatia proposed openstack/python-cinderclient: Pass proxy environment variable to tox
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openstackgerritOpenStack Proposal Bot proposed openstack/cinder: Imported Translations from Zanata
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openstackgerritwanghao proposed openstack/cinder-specs: Get the replicated volume ref for DR
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openstackgerritSilvan Kaiser proposed openstack/os-brick: Add quobyte protocol for remotefs connections
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openstackgerritPeter Penchev proposed openstack/cinder: Reintroduce the StorPool driver
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openstackgerritRico Lin proposed openstack/python-cinderclient: deprecate python26 support
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openstackgerritShu Muto proposed openstack/python-cinderclient: Remove py26 support
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openstackgerritwanghao proposed openstack/cinder: Get the replicated volume ref for DR
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openstackgerritxiaoqin proposed openstack/cinder: Only source-id is accepted for IBM storwize/SVC volume manage command right now. volume manage command using source-name or source-id should be both working.
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openstackgerritxiaoqin proposed openstack/cinder: volume manage using source-name
openstackgerritShay Halsband proposed openstack/cinder: XtremIO: fix generic glance cache with XtremIO
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openstackgerritwanghao proposed openstack/cinder: Get the replicated volume ref for DR
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markus_zThere is a bug reported for nova which sounds a lot like it should be for cinder. Could one of you please have a look at
openstackLaunchpad bug 1521894 in OpenStack Compute (nova) "Datastore selection in cinder vmdk driver is too slow" [Undecided,New]09:29
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wanghaomarkus_z: Looks like should be a issue in vmware driver.09:33
wanghaomarkus_z: not for nova.09:33
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markus_zwanghao: thanks, I moved it to the cinder project and added a person from vmware to the subscriber list.10:28
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openstackgerritMerged openstack/cinder: Delete unused codes in rbd.retype
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DuncanTThe nova blueprint to move dm-setup crypt code to brick just got approved10:49
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openstackgerritSzymon Borkowski proposed openstack/cinder: Use proper config option to connect to keystone
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openstackgerritMerged openstack/cinder: Fix typo in LIO terminate_connection error msg
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openstackgerritMichal Dulko proposed openstack/cinder: Add metadata aliases to Volume object
openstackgerritMichal Dulko proposed openstack/cinder: Recognize extra fields in CinderObjectDictCompat
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openstackgerritVipin Balachandran proposed openstack/cinder: VMware: Unit test refactoring (image to vol - 1/2)
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openstackgerritVipin Balachandran proposed openstack/cinder: VMware: Unit test refactoring (image to vol - 2/2)
openstackgerritVipin Balachandran proposed openstack/cinder: VMware: Replace mox with mock
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dulekShould I expect that migration between two LVM hosts works?13:00
dulekIn my fresh env it fails with "iscsiadm ['-m', 'session']: stdout= stderr=iscsiadm: No active sessions.".13:00
dulekI'm not sure if it's broken in current master or what…?13:01
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genunix_Hello, does anyone know what's the status of implementation of this blueprint?
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genunix_It would satisfy our use-cases so we would like to possibly participate on testing and development of using cinder for bare-metal.13:22
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dulekgenunix_: Have you seen BlockDeviceDriver?13:27
dulekgenunix_: I believe it aims to solve this.13:28
dulekgenunix_: It has some major issues, but e0ne and Yuriy Nesenenko (not sure on his IRC nick) are working to make it usable.13:29
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dulekBTW - my issues with migration are solved, needed to tweak my_ip in cinder.conf.13:30
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genunix_dulek: thank you for pointing me, it seems promising. Our use-case is basically about using Cinder separately from Openstack infrastructure only to maintain volumes for physical nodes.13:33
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dulekgenunix_: So right now this driver is race-condition prone. If I recall correctly can happen that two clients will reserve same physical device.13:34
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dulekgenunix_: I've explained the details somewhere in this review:
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genunix_dulek: ad. our use-case, it seems that it will also require a little bit more than the driver. Eg. how to use cinder for attaching volumes to physical nodes (which are not nova or ironic managed or anyway part of openstack infrastructure)?13:38
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genunix_basically it would be similar setup as eg. Swift which is also possible to setup standalone.13:42
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dulekgenunix_: Sorry, manager called.13:56
dulekgenunix_: There are some efforts to make it possible to attach volumes without Nova.13:57
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dulekgenunix_: I think e0ne and jgriffith are contact points on that.13:57
genunix_dulek: I tried to contact jgriffith with no success so far :-/13:58
dulekgenunix_: I believe he's in PST timezone, so you need to13:59
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dulekgenunix_: Sorry, you need to take that into account.13:59
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itzdilipMy location: Alappuzha, India14:12
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DuncanTgenunix_: e0ne has a draft brick client on github14:13
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DuncanTgenunix_: There isn't actually much/anything on the cinder side, unless you want to work without keystone14:13
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genunix_DuncanT: thanks, that brick thing seems to be what I am looking for :-)14:44
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DuncanTgenunix_: Great. Bug reports (or success reports) welcome14:48
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openstackgerritTom Hancock proposed openstack/cinder: Fix dictionary key error
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openstackgerritMikhail Khodos proposed openstack/cinder: Re-add Nexenta driver
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openstackgerritMichal Dulko proposed openstack/cinder: Switch request_spec in create volume calls to ovo
openstackgerritMichal Dulko proposed openstack/cinder: OVO request_spec in migrate/manage/retype calls
scottdakmartin: hemnafk
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openstackgerritEric Harney proposed openstack/cinder: LIO: Handle initiator IQNs as case insensitive
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wanghaoeharney: hi Eric, Could you do me a favor? Please help me to remove L freeze -2 in this patch:
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eharneywanghao: that patch needs to hold at -2 for now anyway because the format detection is a security hole15:51
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wanghaoeharney: OK, got it. I will try to fix this.15:52
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openstackgerritNate Potter proposed openstack/cinder: Use the catalog to retrieve glance_api_servers
openstackgerritMichael Price proposed openstack/cinder: Implement CHAP Authentication for E-Series Driver
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openstackgerritNate Potter proposed openstack/cinder: Use the catalog to retrieve glance_api_servers
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DuncanTAre we meeting today?16:03
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erlonanyone here?16:04
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openstackgerritThang Pham proposed openstack/cinder: Update migrate_volume API to use versionedobjects
openstackgerritThang Pham proposed openstack/cinder: Update initialize_connection to use versionedobjects
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openstackgerritThang Pham proposed openstack/cinder: Update replication to use versionedobjects
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openstackgerritMerged openstack/cinder: Imported Translations from Zanata
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openstackgerritShay Halsband proposed openstack/cinder: XtremIO: fix generic glance cache with XtremIO
flip214hogepodge: what needs to be done to get included on the marketplace driver list?16:24
flip214hogepodge: we're passing since ~5 months or so ... the DRBD driver is my concern.16:25
flip214hogepodge: thanks for the quick answer, BTW!16:25
hogepodgeflip214: np, these links might help
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flip214hogepodge: thanks, reading.16:28
flip214does that talk about how to get on, too?16:28
hogepodgeThe marketplace home page has the contact information for requesting a product page in the marketplace
flip214thanks for all the pointers.... will read and come back if there are any more questions!16:31
flip214thanks a lot!16:31
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thingeeflip214: that's a good question.16:46
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flip214I'm trying to sneak it in via os-brick now16:46
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flip214because that's where it should be implemented16:46
thingeeflip214: I haven't really thought of it for vendors. so far cross-project specs have been general ideas like quotas, or logging practices...16:47
flip214never mind, I'll just try to go on there.16:47
flip214thanks for listening, that eases the mind.16:47
flip214sorry, kids need taking care of16:47
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hemnaflip214, ?16:48
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thingeeflip214: don't you still need some hook in nova with the os-brick piece?16:49
smcginnisscottda: Any response for the comments on here:
hemnaguess I missed the first part of this conversation16:49
hemnaopenstack-meeting is empty for me as well16:49
smcginnishemna: Freenode issues.16:49
DuncanT1hemna: freenode lost a hub and has been going nuts since16:49
smcginnisHopefully the bot captured it all.16:50
thingeehemna: he was wondering if drbd transport needs a cross-project spec.16:50
thingeehemna: since it touches nova and cinder16:50
DuncanT1I've got local logs from when I joined, if we need to reconstruct16:50
thingeehemna: haven't really considered the specs being used for vendor initiatives16:50
wanghaoit's terrible irc.....16:50
hemnathingee, ah ok.  drbd support has to land in brick first, but if there is no cinder driver for it....16:50
hemnasmcginnis, ah ok.16:50
smcginnishemna: Looks like it caught it:
markus_zsmcginnis: I've seen you do provide bug stats in the cinder meetings. Can I maybe interest you in this?
smcginnismarkus_z: Definitely interested. :)16:51
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smcginnismarkus_z: I have some scripts I use that I was going to combine with openstack-infra reviewstats to publish here:16:52
smcginnismarkus_z: But right now I manually run them.16:52
hemnasmcginnis, we should probably do a build of os-brick as well no ?16:52
hemnakeeping with the client/lib releases on milestones mantra16:53
markus_zsmcginnis: Ah, look like the thing johnthetubaguy provides for nova :)16:53
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DuncanT1markus_z: Very similar, yes16:53
smcginnismarkus_z: Yep, both use the reviewstats stuff.16:53
smcginnisscottda pointed me to what John was doing for nova.16:53
smcginnisI like it.16:53
smcginnisNever hurts to have data. ;)16:53
* DuncanT1 is reminded to push a pull request to russel to get review-stats to count 0 reviews too16:53
markus_zyeah, true.16:54
smcginnishemna: Yeah, I've meant to check with you on that. Do you think it's a good time for it?16:54
smcginnisDuncanT1: I believe Russel is just using reviewstats too.16:54
smcginnisDuncanT1: I have those reports generated here:
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markus_zsmcginnis: ok, cool, just wanted to make you aware of the thing I build. I'll keep you in the loop when it lands.16:55
hemnasmcginnis, there are a few reviews needing a final +216:55
smcginnisThe advantage of mine is that until my patch went through yesterday, it didn't have os-brick and it was looking for volume-api.16:55
smcginnishemna: I'll take a look.16:55
hemnawould be nice to get some other eyes on those16:55
smcginnismarkus_z: Awesome, thanks!16:55
DuncanT1smcginnis: Russel wrote/hosts reviewstats I believe16:55
smcginnisDuncanT1: Ah, cool.16:56
smcginnisDuncanT1: I think he should pick up my change then, if he's running that from the official repo.16:56
smcginnisDuncanT1: Waiting for a +A on this. Look OK to you?
smcginnisDuncanT1: Done it elsewhere already.16:58
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DuncanT1smcginnis: Done17:00
smcginnisDuncanT1: THanks!17:00
thingeewanghao: wrt cinder specs needing reviews, I just approved a bunch yesterday.17:01
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thingeewanghao: might17:01
thingee've not been yours though =/17:01
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smcginnisDuncanT1: Another easy one if you want:
smcginniswanghao: I do have a tab open.17:03
smcginnisWe do need to get some more of the specs moving along.17:04
DuncanT1smcginnis: Looking17:04
winston-dDuncanT1: oops, i've +A it17:04
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smcginniswinston-d: :) Thanks!17:05
winston-dit's been on my gerrty for a while17:05
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smcginnishemna: That was quick. os-brick should be ready to go this afternoon hopefully.17:05
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xyangjgriffith: ping17:05
hemnasmcginnis, ok rockin thanks17:05
jgriffithxyang: :)17:05
openstackgerritTom Hancock proposed openstack/cinder: Fix dictionary key error
jgriffithxyang: I  knew I'd be hearing from you soon17:06
xyangjgriffith: :)17:06
xyangjgriffith: so we do have a default implementation for drivers that doesn't attach snapshot17:06
xyangDuncanT1: we are talking about backup snapshots spec17:07
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jgriffithyes, DuncanT1 pointed that out and I updated the comments17:07
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xyangjgriffith: I think we should still provide a way to backup a volume in-use, that is a use case too17:07
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scottdasmcginnis: Comments on the A-A/HA spec? I'm not sure which comments you mean17:08
xyangjgriffith: maybe seems redundant, but from user's point of view, it is convenient to have both ways17:08
xyangjgriffith: they can do it in one step instead of two17:08
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openstackgerritTom Hancock proposed openstack/cinder: Fix dictionary key error
DuncanT1scottda: there's the confusing bit of language around cleanup for starters17:09
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xyangjgriffith: also if you take a look of the code change, it is small17:10
andrew____hi, im trying to add another custom attribute just to learn more about cinder. from what i understand, i would need to change the db, is that correct?17:10
jgriffithxyang: yes, I know it's a simple change, and probably a good one17:10
jgriffithxyang: I just wish we would only do snapshots and not volumes17:11
xyangjgriffith: I think backup in-use volume has its value too17:11
scottdaDuncanT1: smcginnis OK, I see the cleanup comments and they are vague. I'll put my 2cents in a comment.17:11
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jgriffithmaybe deprecate the existing volume-backup method and go forward with doing snaps only?17:11
jgriffithxyang: my issue is that we're creating a confusing API and user experience17:12
jgriffithxyang: and weird rules and code-paths17:12
xyangjgriffith: we do have volume backup to start with17:12
xyangjgriffith: deprecating may not be good user experience17:12
xyangjgriffith: they expect to backup an in-use volume too17:12
xyangjgriffith: I think the complexity is because we are finding the parent backup automatically for incremental, other than that, it doesn't seem complicated17:14
jgriffithxyang: yeah, I know you're not going to agree with me (and that's ok) :)17:14
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jgriffithxyang: I completely expect to be completely over-turned on this17:14
jgriffithxyang: I also made it a -1 and not a -2 only to voice my opinion but to NOT block anything17:15
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xyangjgriffith: I do hope to get your support on this though, a +1 rather than -1 or -2:)17:15
jgriffithxyang: I'd say it is somewhat complicated because we get into a maintenance case of "what is the code path/flow"17:15
openstackgerritGerald McBrearty proposed openstack/cinder: Add config option to control flash copy rate
jgriffithxyang: sometimes it's one way, sometimes another... and when it's attached it's a little of both17:15
xyangjgriffith: It does add more to the code.  I'll add more comments to clarify it17:16
jgriffithxyang: don't get me wrong, I think it's the right way to do it.  I just wish we did it ONE way for everything17:16
jgriffithand just focused on that17:16
xyangjgriffith: sure17:17
jgriffithxyang: when it's time to fix a bug or add an enhancement or whatever it sucks to have to try and remember to clean it up in multiple places in different ways17:17
Swansonjgriffith, Should there be an update_replications function?  In case someone changes their replication destinations?  Driver would tear down repls that are not listed on the backend any more and create those that are there now?  Thots?17:17
jgriffithxyang: multiple code-paths == badness IMO17:17
jgriffithSwanson: retype17:17
xyangjgriffith:  I'll add more comments and hopefully it is clear what is expected17:17
openstackgerritThang Pham proposed openstack/cinder: Implement refresh() for cinder objects
jgriffithxyang: thanks... I'll remove my vote and butt out of it :)17:18
Swansonjgriffith, Oh me on my.  I'll look into that.  Thanks!17:18
xyangjgriffith: thanks!17:18
openstackgerritEric Harney proposed openstack/cinder: LIO: Handle initiator IQNs as case insensitive
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jgriffithSwanson: :)17:20
jgriffithSwanson: that was the idea anyway... if that doesn't work for some reason lemme know17:20
jgriffithSwanson: but there's retype, and theres the repstatus update info17:20
jgriffithso we should be covered17:21
jgriffithkeeps things rather simple IMHO17:21
xyangjgriffith:  someone was asking a question on failover yesterday.  After failover, the volume status become failed over.   Is there any way to make it enabled again, other than manually change the db?17:21
jgriffithxyang: we've had some discussions on that....17:21
Swansonjgriffith, so if the vol  type is the same in retype I should take the opportunity to resetup the repls.  Easy enough.17:21
jgriffithxyang: I've been leaning towards that should require admin intervention17:21
Swansonjgriffith, repstatus update info?17:22
Swansonjgriffith, is this the get_replication_updates bit?17:22
xyangjgriffith: sure.  it's just that we currently cannot reset status17:22
jgriffithxyang: I like the concept of "hey... you can fail over in bad scenario, BUT an admin needs to get involved to figure out what went wrong and how to recitify things"17:22
xyangjgriffith: with an API17:22
jgriffithxyang: ahhh17:22
xyangjgriffith: I think if admin change the volume status in the db, then we are good again.  just lack of api for that17:23
jgriffithxyang: we'll certainly need to address that17:23
xyangjgriffith: sure, thanks17:23
jgriffithxyang: absolutely17:23
xyangjgriffith: by the way, I submitted a WIP patch to add tempest tests for CG:
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jgriffithxyang: oh cool!17:25
jgriffithxyang: so just change the backup config to CG-config and it should be good no?17:25
xyangjgriffith: I think so17:25
jgriffithxyang: awesome!  Thanks for going that route17:25
xyangjgriffith: I just need to test more17:26
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xyangjgriffith: I don't think we can run them in the gate even if we have a gatedriver there though because the policies are disabled by default17:26
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scottdaDuncanT1: smcginnis I commented on the HA/AA spec. Perhaps geguileo will have something to add. I also don't think the spec needs to be re-spun to reflect this clarification.17:27
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jgriffithxyang: I'm fairly opposed to the gate-driver strategy anyway17:32
jgriffithxyang: it's one more thing to support with little or no value17:32
jgriffithxyang: if we key off of the support config settings in tempest I think we have a win / win17:32
xyangjgriffith: ok, did you come up with that name?:)17:32
xyangjgriffith: I do intend to have our CI's run those tests17:33
jgriffithxyang: the gate-driver name?  No, not me17:33
xyangjgriffith: I thought when I brought this up at the summit, someone picked this name17:33
jgriffithxyang: yeah, i think that's the right answer... maybe even take it a step further at some point and key off of the drivers capaibilities report17:33
jgriffithxyang: maybe... I dont' remember :)17:33
xyangjgriffith: I was initially thinking about adding it to tests folder17:33
jgriffithxyang: but it's all recorded for historical purposes and to protect the innocent :)17:34
jgriffithxyang: yeah, that's what I'd really like at some point17:34
openstackgerritGerald McBrearty proposed openstack/cinder: Storwise: add config option to control flash copy rate
xyangjgriffith: I'll go check on youtube:)17:34
jgriffithxyang: but crawl, walk run (CWR)17:34
jgriffithLOL... please don't!17:34
xyangjgriffith: it could be you, don't be surprised:)17:34
jgriffithI contradict myself enough, don't need evidence from youtube :)17:34
xyangjgriffith: I'm fine not to submit that.17:34
xyangjgriffith: tempest tests are needed any way17:35
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xyangjgriffith: it will be easier for people who want to make changes to CG but doesn't have a backend that really supports it17:35
xyangjgriffith: that was my original intention17:36
jgriffithxyang: yeah, I think it's the right answer17:36
xyangjgriffith: may be I can add it to the fakedriver in the tests?17:36
jgriffithxyang: oh... no, wait :)17:36
jgriffithxyang: what I meant was relying on third party CI seems like the right answer to me17:37
jgriffithI guess adding it to the existing fake-driver might be a good compromise though17:37
xyangjgriffith: sure, relying on 3rd party CI is good.  It is just easier if someone wants to run it themselves, debug, etc17:38
jgriffithfair point17:38
xyangjgriffith: otherwise they have to rely on logs only17:38
DuncanT1Adding it to the fake driver is a good thing anyway, you can do some nice scale testing with it easily17:38
xyangDuncanT1: scale testing?17:38
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DuncanT1xyang: The fake driver is great for things like testing the scheduler with 200 backends, that sort of thing. I'm hoping to use it for more complex tests in future17:39
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xyangDuncanT1: sure17:39
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openstackgerritMerged openstack/cinder-specs: Support HA Active/Active configurations
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openstackgerritMikhail Khodos proposed openstack/cinder: Re-add Nexenta driver
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hemnaxyang, from what I remember we named it the gate driver in the meetup in Tokyo18:11
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xyanghemna: that's what I remembered:)18:15
openstackgerritMerged openstack/os-brick: Correct a log message
xyanghemna: we have youtube to prove it too:)18:16
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hemnaI'm sure it's in there somewhere.18:17
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smcginnisall: py26 support officially dropped from python-cinderclient18:29
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jgriffithsmcginnis: py26 is dead, long live py26!18:34
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openstackgerritMikhail Khodos proposed openstack/cinder: Re-add Nexenta driver
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smcginnisAnyone else having issues running tox -ecover18:49
smcginnisGetting an error, reports success, no output.18:49
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openstackgerritSean McGinnis proposed openstack/os-brick: Add requests to project requirements
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eharneysmcginnis: it's running for me18:54
tbarronsmcginnis: seems like it worked recently, trying again now18:54
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smcginniseharney, tbarron: Thanks. Could very well just be me. I'll try on another machine.18:55
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ildikovhemna: hi. are you around?19:36
ildikovhemna: I would like to talk to you about the multi-attach blueprint19:36
hemnaildikov, hey19:37
hemnaildikov, I'm guessing you saw my review.  heh19:37
ildikovhemna: hehe, yeap, you're pretty right :)19:38
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ildikovhemna: so the thing is that I'm getting confused as if you check the previous reviews we got to the point that volume attachments should be handled on host level19:38
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ildikovhemna: we had a bug on Cinder side, when we ried to handle the attachments per instance:
openstackLaunchpad bug 1471278 in Cinder "target removal on detaching volume with multi-attach flag" [Undecided,Invalid]19:39
ildikovhemna: and it was also marked as invalid with the same explanation as the spec is written now in Nova19:40
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ildikovhemna: could you help me clarify this?19:43
ildikovhemna: the other side of the issue is that Nova spec freeze is tomorrow19:43
hemnahold on a sec...on a phone call...19:43
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openstackgerritNate Potter proposed openstack/cinder: Check backup service before backup delete
hemnaildikov, ok back20:06
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openstackgerritMerged openstack/os-brick: Fix iopsLimit parameter in ScaleIO connector
ildikovhemna: ok, I'm still here20:07
openstackgerritMerged openstack/os-brick: Multipath Device Action Being Parsed as Name
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hemnaildikov, reading through the 1471278 bug..20:07
hemnaildikov, ok so I'm not sure that bug is overly descriptive20:08
hemnaI'm unclear if the nova side was passing the attachment_uuid along with the detach call to cinder20:08
ildikovhemna: according to my understanding Cinder removed the target regardless of the fact that there were still existing attachment on the given host20:09
hemnaI presume this was an lvm cinder driver20:09
ildikovhemna: also could you please check smcginnis's comments on the spec patch set #12?20:10
openstackgerritMerged openstack/os-brick: Brick add param documentation to connectors
openstackgerritMerged openstack/os-brick: Add quobyte protocol for remotefs connections
hemnaok I'll go back through the review comments and see if I can wrap my head around it all20:10
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hemnabut if my initial assumptions end up being correct, it could be a bug in the lvm driver's terminate connection call.20:11
hemnasome backends will export a single volume to a host, no matter how many attachments there are to vms on that host.20:11
SwansonAre replication-promote and replication-reenable replication v2 functions?20:11
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hemnaother backends will export a target for every attachment.20:11
ildikovI'm not sure about the driver itself, it most probably was the lvm one we tested, but unfortunately I wasn't the one who did it20:12
hemnaildikov, fair enough :)20:12
hemnalvm is a bit of a special case in some respects20:12
ildikovbut the bug is not that important at this point, I'm more worried about the Nova spec freeze tomorrow20:12
hemnaeven though it's the reference driver20:13
hemnanova spec freeze is already?!?!20:13
ildikovwhen we had the fix for the bug up for review the main concern was that the different drivers have different behavior20:13
hemnaso nova gets 1 milestone to get all specs in place for the entire release?20:13
hemnathat doesn't give folks a lot of time to work out issues.  :(!20:14
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ildikovyes, because the last milestone is for high prio items20:14
ildikovand this one is not a high prio one, although still smth that many people would be happy about20:14
ildikov(including me and I assume you too :) )20:14
hemnawe've been trying to get this in for a few years now20:14
ildikovso we have code on the Nova side already20:15
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hemnathat's my original patch way back when20:15
ildikovI rebased it, I need to double check it though, but most of the tests look ok20:15
ildikovthe API part we agreed with John to skip as they want to remove volume creation from the Nova API20:16
hemnaildikov, cool!20:16
ildikovthe rest of the code is more or less in shape assuming attaching a volume per instance and not per host20:17
hemnaildikov, ok so I don't know what to do.20:17
hemnacinder has the volume_attachments table that is supposed to track attachments20:17
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ildikovif you check the comments around patch set #12 on the spec, then you will see why I modified the blueprint to handle the attachments per host20:19
ildikovI checked the Cinder blueprints and wiki pages20:19
ildikovthere is one, which talks about host level attaching a volume, all the rest refers to instances20:20
hemnaildikov, ok I'll read through it.20:21
ildikovhemna: is the intention on Cinder side to track all the attachments to actual VM instances?20:21
hemnaildikov, yes20:21
hemnaildikov, that was the intention20:21
hemnaand the attachment_uuid uniquely identifies each attachment to each instance20:22
ildikovand how does it work in reality when we're attaching a second volume?20:22
ildikovor what's the most common way for the drivers?20:23
ildikovhaving let's say one target and then the initiator on the host opens a new iSCSI connection?20:23
hemnathe attach call comes in for the new instance, we save the attachment against that new instance and we get a 2nd record in the volume_attachments table20:23
hemnaand that gets a unique attachment_uuid20:23
hemnaso when nova calls detach, it's supposed to sent the attachment_uuid of the instance it's detaching from.  Then cinder updates that record20:24
hemnaand is able to track correctly the state of the volume. (in-use, available)20:24
hemnaildikov, so what the cinder driver actually does is entirely dependent on it's backend and how it does attachments.20:25
smcginnisildikov, hemna: Sorry, just got back from a block of meetings.20:25
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ildikovthe bug is about this part as Cinder completes the whole detach for the first call, maybe only for lvm case, I would need to check that20:25
smcginnisildikov: And sorry, looks like I may have given bad information. :{20:25
hemnawe can't make any assumptions on how each cinder backend does it's exports (targets) and detaches.20:25
ildikovsmcginnis: no probs, we're in the middle of the story still :)20:25
hemnaildikov, I think that bug was really against the lvm driver20:25
smcginnisildikov: hemna  will straighten us out. ;)20:25
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hemnasmcginnis, or confuse us even more :)20:26
ildikovhemna: but we need to ensure somehow still that the volume does not get detached from a host when there's still active attachment20:26
smcginnisI honestly wasn't aware we tracked per vm instance.20:26
smcginnishemna: What is the reason for that?20:26
hemnathat's the job of the cinder driver to know if it still has active attachments on that host20:27
smcginnishemna: As a backend, I don't really care what nova does with it once it's exposed on the compute host.20:27
hemnasmcginnis, because some backends export a new LUN per attachment, even on the same host.20:27
ildikovhemna: ok, then we can re-open the bug with this additional comment20:27
hemnaand we need to know which one of those to nuke at detach time.20:27
smcginnishemna: Is there a technical need for that?20:28
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dulekdiablo_rojo: Hi, can you take a look and advice on ?20:28
smcginnisUltimately nova just needs a scsi device to use for the vm. Why make multiple scsi devices for the same volume?20:28
hemnasmcginnis, other than that's the way the backend works20:28
dulekdiablo_rojo: I believe it's failing because of config options generator.20:28
hemnathis is how the 3PAR works fwiw.20:29
hemnaour other driver (lefthand) does a single target per host, regardless of how many instances on that host have the volume.20:29
dulekdiablo_rojo: Ah, it's more complicated. Patch is adding a new options group. How to proceed with that and genopts?20:29
hemnabut without tracking in cinder you could get the volume in available state by just accidentally calling the cinder detach api20:30
smcginnishemna: Still not sure why 3par would need to know there are more than one instances using the volume.20:30
smcginnisGuess I need to learn more about other backends.20:31
hemnaalso, the attachment tracking comes into play when you attach to multiple hosts20:32
hemnare: attaches to ironic, and attaches to cinder nodes.20:32
diablo_rojodulek: You need to run tox -e genopts to get a new file20:32
hemnathose also get entries in the volume_attachments table20:32
smcginnisI see multiple hosts, because ultimately from the storage side it's that target<>initiator connectivity.20:33
smcginnisI still don't see how instances have any visibility to a backend.20:33
diablo_rojodulek: That should get all the recently added options and then you should be able to check in that file and pep8 should pass.20:33
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dulekdiablo_rojo: But has the sections hardcoded.20:34
ildikovI assume the question here whether we would need different LUNs for each instance in case of 3PAR or it's enough to have one per host and have multiple instances using it20:34
dulekdiablo_rojo: And we're adding a new [coordination] section.20:34
Swansonaorourke, jgriffith are replication-promote and replication-reenable repl v1 functions?20:34
diablo_rojodulek: Oh okay.20:34
hemnaso if we only use 1 attachment per host, then nova has state that cinder doesn't20:34
jgriffithSwanson: yup20:34
ildikovalthough I'm not really dying for refactor the Nova code if it's not what was the intention here oon the first place either20:35
smcginnishemna: But why does cinder care about that state.20:35
hemnameaning only nova has the source of truth for attachments.20:35
smcginnisIf they want 1 vm or 10 vms, why do we care?20:35
hemnasmcginnis, force detach issues20:35
Swansonjgriffith, Excellent.  Mentally flushed.20:35
hemnaand reset state20:35
dulekdiablo_rojo: Is there a reason sections are hardcoded? Should we just add it to generate_cinder_opts? This seems a little odd.20:35
smcginnishemna: But a force is a "force". Still, why does storage care?20:35
ildikovI'm fine if Cinder handles the state, from the perspective hemna highlighted that sounds more clean20:35
hemnausers could be dumb and try and force detach for 1 dead instance, which nukes all of them for the rest.20:35
smcginnisNot trying to be difficult, just don't understand.20:35
diablo_rojodulek: Yeah currently those sections aren't being pulled out dynamically. One of the things on my plate is to do that. At this point you're probably going to need to hard code it.20:36
hemnasmcginnis, well but you may have 1 dead vm on the same n-cpu node and need to force detach it.20:36
smcginnisThis is different than any other storage management behavior I've ever dealt with.20:36
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smcginnishemna: Well, yeah. :)20:36
hemnawhich will bypass all the nova checks to call terminate connection and detach20:36
smcginnishemna: That would be on the nova side, no?20:36
hemnaand now you've lost the target for the rest of the vms.20:36
smcginnisWhy would you be calling detach to your storage if you are detaching a vm?20:36
smcginnisCinder detach shouldn't ever be called unless that host no longer needs the SCSI device.20:37
hemnawe call it today w/ terminate_connection and detach.20:37
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hemnabut there is nothing preventing a user from calling it via the cinderclient to try and force detach20:37
hemnaand cinder would have no idea that it's attached to another 5 vms on that host.20:37
hemnaoops, there goes your target.20:37
dulekdiablo_rojo: Okay. bluex - you may want to take a look on my conversation with diablo_rojo.20:37
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smcginnisBut again, your telling cinder to force a detach. So wheterh a vm or container or whatever is using the volume, as a block storage service we just remove the device.20:38
hemnaanyway, I have to get some chow.... /me is starving20:38
smcginnisildikov: Sorry, we'll obviously need more discussion on this. :/20:38
jgriffithmake clean; make all20:39
ildikovsmcginnis: well, I don't know how much you checked our discussion with hemna, but the Nova spec deadline is tomorrow :S :( :.( etc. :)20:39
smcginnisildikov: Yeah, saw that. :{20:39
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ildikovsmcginnis: but I'm on the side of clarifying this for sure20:39
smcginnisildikov: Maybe we can at least get to the point of the spec being OK, then fix up in the implementation.20:40
ildikovsmcginnis: hemna: and obviously I would like to understand the behaviour also20:40
ildikovyeah, that would be great, but that part is what needs more discussion as much as I ccan see here :)20:40
hemnaok so20:41
ildikovsmcginnis: hemna: can we continue this a bit later today to get to a consensus?20:41
hemnaon one hand, this sort of violates the volume_attachments table20:41
hemnabut I wonder if we could just get away with it in the short term20:41
hemnaand see how it goes ?20:41
hemnawe could eventually migrate to what I've been discussing later ?20:42
smcginnishemna: To clarify - you mean get away with how the spec is written right now?20:42
hemnameaning nova doesn't call cinder after the 1st attach20:42
hemnait bugs me and I think we might run into problems20:43
ildikovhemna: well, if we go for the per host direction that means refactoring on Nova side20:43
hemnabut that's almost always the case w/ anything20:43
ildikovhemna: I'm not sure about the Cinder part, there might not20:43
hemnaI'd love to see the end to end ability land finally20:43
ildikovhemna: so it's easier to go for the per instance version and then refactor if that seems better longer term20:43
hemnaildikov, the downside is that we'd have to add checks in the drivers to make sure it doesn't nuke the target if there are other attachments to the same host.20:44
hemnaand I'm not sure the lvm driver has any concept of that at all20:44
ildikovhemna: I mean the pervious version of the spec looks easier not the one you've just commented on20:44
hemnaonly the attachments table has that, and it doesn't track the host for the instance20:44
ildikovhemna: sure, this is what we had that bug report for originally20:45
smcginnisildikov: I think as it is is where it needs to be, but we need to hash some of this out on the cinder side.20:45
ildikov:(, yeah, why life would be easy just out of the box20:45
hemnaildikov, would be nice!20:45
smcginnishemna: Maybe change your vote for now, let's try to get the spec through while we can, then we can mess with it as we go? :)20:46
jgriffithhemna: curious, didn't we go with just making attachments a list in Cinder?20:46
jgriffithhemna: or did that suggestion flop20:46
ildikovsmcginnis: I have the code for the earlier version of the spec and I have a gut feeling that the refactorings on Nova side will not be that straight forward20:46
hemnajgriffith, that has other problems20:46
* jgriffith supposes he could look20:46
jgriffithbut there's the answer20:47
hemnathose problems related to force detach and detaching on baremetal.20:47
hemnaanyway....I have to go get food before the cafeteria here closes.20:47
jgriffithhemna: that seems to be the "phrase of the month"20:47
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ildikovsmcginnis: sorry for favoring the per instance direction as a first step20:49
smcginnisildikov: No, I get it from your perspective.20:49
smcginnisI just don't think it makes sense for a block storage service to know or care about vm instances.20:49
smcginnisEspecially as we start looking at containers and bare metal as consumers of the block storage.20:50
ildikovwe tested the initial version of that code and it's feature is delayed for so long now20:50
smcginnisIt really doesn't matter to me who or what is consuming my storage.20:50
ildikovyeah, that sounds reasonable20:50
smcginnisildikov: :(20:50
smcginnisildikov: Hopefully we can get this through.20:50
smcginnisildikov: I would love to see this implemented.20:50
ildikovso if we can start with the current as a first step, than we would have a better likelyhood to get this into Mitaka20:51
ildikovand then we can refactor it on both sides as for the user it should be transparent how we handle the attachments in the background20:51
smcginnisildikov: Yeah, let's just get things going. We can correct down the road. Totally agree.20:51
ildikovby current I meant the code for the per instance base20:51
smcginnisildikov: If that's what we have to do, then I'm fine with that.20:52
ildikovsmcginnis: believe me, I'm the kind of let's make things the right way, but realistically the winter cycle is too short for that20:52
ildikovespecially with the Nova deadlines20:52
smcginnisildikov: I do think it needs to change, but this is obviously a bigger issue than just this spec.20:52
ildikovyeah, I agree20:53
scottdaildikov: Sorry to be late to the conversation. IRC client acting up on me. I just added comments to your spec20:53
scottdaAnd I think I missed an early part of this conversation.  Prior to 20:36 UTC20:54
smcginnisildikov: If you get agreement from hemnafood and scottda, I'll get in there later and give a +1 for my support.20:54
ildikovsmcginnis: cool, thanks :)20:55
smcginnisscottda: Search for "ildikov, ok back" :)20:55
scottdawell, that is handy. Thanks20:55
ildikovscottda: we've just been discussing the main directions here which are either handling attachments per host or per instance20:55
ildikovsmcginnis: lol :)20:56
openstackgerritNate Potter proposed openstack/cinder: Use the catalog to retrieve glance_api_servers
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scottdayeah. And is the direction going towards per instance?20:56
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smcginnisscottda: I believe so. Is that you're take ildikov?20:58
ildikovthat's my preference at least as a first step for now20:58
ildikovscottda: what would be your 2 cents for the topic?20:59
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scottdaI think that Nova should not have to manage the attachments, and Cinder should have to deal with it, even if that means individual drivers will need some way to keep track in the case of 1 export per host.21:00
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scottdaI should have said exports instead of attachments21:00
smcginnisscottda: Why does block storage care about VMs?21:01
smcginnisscottda: When we do bare metal, do we need to track which apps are using it? :)21:01
smcginnisscottda: We should just care about exposing storage to an initiator.21:01
scottdaIt should not care about VMs or bare metal. But the problem seems to be at the level of terminate_connection, not detach()21:01
smcginnisscottda: If that initiator runs VMs and attaches one or more to the volume, then that's the domain of that host.21:02
ildikovscottda: we were also discussing these options as short term and long term, where per instance is the short term one21:02
smcginnisscottda: It's up to the service controlling the inititator to say when it no longer needs the attachment.21:02
smcginnisscottda: So nova should only call cinder detach if it no longer needs access to that block storage.21:02
ildikovdumb question do we have/can we have multiple connections for the same volume per initiator?21:03
scottdasmcginnis: Fair enough. I think that should be called out in the spec, since there is both the detach() management of the Cinder DB and the terminate_connection to manage the export.21:03
smcginnisildikov: Multipathing?21:03
smcginnisscottda: That's where i think we should be. For the purposes of getting this spec through I think we just have to go with the per-instance bit.21:04
smcginnisBut I don't like it. :)21:04
smcginnisSorry, gotta run. bbl21:04
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ildikovsmcginnis: yeah, i think my question falls there, but let's continue later21:05
scottdaildikov: What time zone are you in?21:06
ildikovscottda: CET, it's 10pm now21:06
scottdayikes, getting late for you.21:06
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ildikovscottda: but Nova spec deadline is tomorrow...21:06
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ildikovyeah, I gave my soul to open source, I'm not always sure it was a good deal... :)21:07
ildikovso I hope we can agree one the Nova side of the mult-attach spec here as i still need to hunt down Nova folks to get this through21:08
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scottdaYes, when hemnafood turns into hemna we should be able to resolve this.21:09
ildikovyeap, hopefully he does not take the afternoon off :)21:09
ildikovI hope we can agree on a step by step option and start with the per instance direction as it seems that was the intention on Cinder side and then refactor to per host and then let Nova ddeal with the attachments21:10
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scottdaI'm OK with that and I am not very adamant about either direction. I'm just interested in making the design as smart as possible.21:13
scottdaAnd I also don't worry about the 'force detach' case where a user calls the detach API directly without Nova. That's dangerous and unsupported AFAIC21:14
ildikovlong term that sounds good, I mean the as smart as possible21:14
ildikovbut with Nova deadlines we need something that works first IMHO21:14
ildikovhehe, it's quite hard to fully prepare a system for users, they will eventually break it anyway21:15
scottdaThe main issue seems to be the case where there is >1 attachment to a given host. If backend storage can handle this in different ways, by exporting a single LUN or  >1 LUN, then someone (NOva or Cinder) needs to keep track of when the last detach is occuring.21:15
scottdaAnd I fully sympathize with the deadline. I'm for whatever it takes to get this through.21:16
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ildikovif for the 2nd+ instance the attach happens only on Nova side, then there should not be additional LUNs per host21:16
Swansonjgriffith, replication_status seems to have undergone some changes.  Are the expected states captured in a document or should I just work my way through again?21:17
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ildikovscottda: but Nova needs refactoring to handle it this way21:17
ildikovit seems that attaching a volume is quite centralized, I'm more concerned about detach, I mean when we get there to have the last instance detaching a volume so we would need to call out to Cinder to terminate_connection also21:19
jgriffithSwanson: this one
jgriffithSwanson: or status?21:19
Swansonjgriffith, replication_status.21:19
scottdaildikov: Yes, either Nova needs the logic or Cinder. I see smcginnis  arguement that Cinder should not care how the volume is used on a host once the export is presented.21:20
scottdaildikov: Have you looked in detail at the scope of the Nova refactor?21:20
jgriffithSwanson: so what's the question exactly?21:21
ildikovscottda: to be honest as mid/long term goal I share that view21:21
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Swansonjgriffith, When is what returned?21:21
ildikovscottda: not deeply21:21
jgriffithSwanson: so the status fields haven't been changed since V121:21
scottdaSorry, could you repeat the short term solution? Doing it per instance? I'm not sure how we'd deal with terminate_connection in that case.21:21
ildikovscottda: I got some pointers for the attach part, and I was told that deatch seems harder to handle, but I'm not full time on Nova :(21:22
jgriffithSwanson: valid states are still: enabled, enabling, disabled, disabling, error21:22
scottdaWould Nova call terminate_connection along with each detach whenever 'nova volume-detach' is called, as it is done today?21:22
Swansonenabling_secondary looks to be in there.  active, copying, etc.21:22
ildikovscottda: from what hemnafood said earlier that was the original idea that Cinder is supposed to handle this21:22
Swansonjgriffith, Just going to go through and do what is appropriate.21:23
scottdaildikov: OK. We'll have to wait for him to see if there is still a gap on the Cinder side. He wrote that code :)21:23
ildikovscottda: if that's how it works today when we call detach, then I assume this should be changed21:23
jgriffithSwanson: notice the nightmare V1 stuff is still in there... just focus on V2 if I were you21:24
openstackgerritMikhail Khodos proposed openstack/cinder: Re-add Nexenta driver
scottdayes, but Multi-attach is already in Cinder. So I'm not sure what would be missing.21:24
ildikovscottda: then it's better to not make decisions without him :)21:24
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ildikovscottda: well, right, so the terminate_connection part should be handled somehow too, but we had issues with detach so it should be double checked for sure21:27
Swansonjgriffith, That looks like a plan.  I'm checking statuses I do not need to be.  I think I'll just remove them.  If the layers above are checking that I'm in the right state I'll call it good.21:27
jgriffithSwanson: yeah... that V1 stuff is actually a bit of a nightmare, and confusing IMO21:28
jgriffithand having both versions in the code base at the same time is not helping anyone :(21:28
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openstackgerritManjeet Singh Bhatia proposed openstack/python-cinderclient: Pass proxy environment variable to tox
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ildikovhemna: please ping us with scottda, if you're ready to discuss and agree on the next steps21:39
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hemnahey I'm kinda here21:48
hemnadid you guys solve everything?21:49
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scottdaSo, it seems there are 2 basic issues:21:49
scottdaOne is that the spec doesn't refer to the attachment_id for calling detach. That doesn't seem too controversial.21:49
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scottdaThe other is whether Nova should call terminate_connection each time the end user calls 'nova volume-detach' and let Cinder deal with the export...21:50
scottdaor whether Nova should manage the connections on it's side and determine when the last volume on a particular host is detached, and call terminate_connection at that time.21:51
scottdaWith the problem being complicated by the fact that a backend storage driver might export 1 lun for multiple volumes on the same host, or might export >1 lun21:51
scottdaDid I get that right?21:51
ildikovthe attachment_id is referred in the spec21:51
ildikovso when we go to Cinder we use it, the question is what complexity we should have in Nova and what in Cinder as much as I can see21:52
scottdaildikov: Yes, but see the comments hemna and I have made regarding attachment_id. It's really a small thing and not the important one, I don't think.21:53
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scottdaThe controversy seems to be around how/when to call terminate_connection. Unless I've gotten this wrong.21:54
hemnacinder's unreserve_volume checks attachments in the volume_attachment table as well21:55
ildikovscottda: yeah, so I would go with patch set #12 for now21:55
hemnanm, I think that's safe21:56
ildikovscottda: that basicly leaves tracking and responsibility on Cinder's side, which was the intention if I understood hemna correctly21:56
hemnaI'm trying to see if there are any gotchas with the volume state if we don't have nova call cinder for secondary attaches21:56
hemnaildikov, yah21:56
openstackgerritCyril Roelandt proposed openstack/cinder: Python 3: fix cinder.tests.unit.api.contrib.test_snapshot_{,un}manage
openstackgerritCyril Roelandt proposed openstack/cinder: Python 3: fix cinder.tests.unit.volume.drivers.netapp.eseries.test_utils
openstackgerritCyril Roelandt proposed openstack/cinder: Python 3: fix cinder.tests.unit.api.contrib.test_scheduler_hints
openstackgerritCyril Roelandt proposed openstack/cinder: Python 3: Use oslo_serialization.jsonutils.loads instead of json.loads
openstackgerritCyril Roelandt proposed openstack/cinder: Python 3: fix cinder.tests.unit.api.contrib.test_volume_{,un}manage
openstackgerritCyril Roelandt proposed openstack/cinder: Python 3: fix cinder.tests.unit.api.contrib.test_cgsnapshots
openstackgerritCyril Roelandt proposed openstack/cinder: Python3: fix cinder.tests.unit.api.contrib.test_volume_encryption_metadata
openstackgerritCyril Roelandt proposed openstack/cinder: Python 3: fix cinder.tests.unit.api.v2.test_volumes
openstackgerritCyril Roelandt proposed openstack/cinder: Python 3: fix cinder.tests.unit.api.contrib.test_snapshot_actions
scottdayes, but I believe smcginnis is of the opposite opinion.21:58
smcginnisRight now I'm of the opinion of what is the path of least resistance to get this nova spec through.21:59
smcginnisThen I'll be of the opinion of how do we fix it. :)21:59
ildikovsmcginnis: I like your supportive attitude :)21:59
hemnaso, we'd need to fix the lvm driver to support multiattach21:59
hemnaor disable it22:00
ildikovI can write up a backlog spec for Nova to cover the direction to handle the attachments on host level22:00
hemnait would need to know that it has attachents left on that host and terminate_connection would be a noop.22:00
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openstackgerritMitsuhiro Tanino proposed openstack/cinder: Robustify writing iscsi target persistence file
ildikovsmcginnis: the spec would go through somehow with the current form too, I'm more worried about the corrsponding code22:01
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scottdaBut we can worry about the code after tomorrow :)22:01
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ildikovsmcginnis: refactoring takes time and then we need to fight for review attention, which is tough according to my experience :S22:02
scottdahehe , yes mine too.22:02
ildikovscottda: well, non-priority code should be up for review nowadays too :)22:02
scottdahemna: Won't we need to fix LVM to support multi-attach anyway?22:03
smcginnisildikov: Yeah, I know hemna has had a lot of fun getting stuff in nova. hehe22:03
zoharhi all! can i get some pointers about writing a new nbd driver please?22:03
zoharbasically what our appliance can do is create nbd devices (like /dev/nbd1, etc...) from cluster objects22:03
ildikovsmcginnis: hehe, then I will ask him for help, as he already knows how to do that :)22:04
scottdazohar: Here's an overview:
zoharin this case, it is block device (like iscsi)22:04
hemna*sigh*   meeting....22:04
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ildikovoh, we lost hemnafk :(22:05
scottdaSo, does ildikov 's spec need an update? I'm just not clear where it says anything about dealing with terminate_connection....22:05
scottdaIt should probably be called out whether it happens each time a 'nova volume-detach' is called, and Cinder does the management, or whether Nova will track the number of uses of each connection.22:06
zoharso my question is simple, how can i serve a local device (on the node that should consume it, ie hyper-convergance) as a cinder volume?22:06
ildikovscottda: so I would like to fall back to patch set #12 and there we kind of need to decide about the terms we use22:07
zoharand the driver logic of creating/deleting/etc it will take care of of course22:07
zoharit would be somewhat similar to lvm22:07
zoharexcept no partitions, just raw devices22:07
zoharnbd devices22:07
zoharany pointers? :)22:08
zoharsorry for spamming btw ^_^22:08
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smcginniszohar: I would recommend taking a look at the lvm driver as a basis.22:09
smcginniszohar: And modify from there where it is different.22:09
scottdaildikov: I am actually fine with either choice for managing the connections myself. So let's make sure smcginnis and hemnafk are on board with the decision.22:09
zohari did, had troubles figuring it out22:09
zoharthank you though22:09
zohari will look more22:09
smcginnisscottda, ildikov: hemnafk understands the way things are better than me. I just understand the way I think they should be. :)22:10
smcginnisSo hopefully he's back soon and can give his input.22:10
smcginnisFrom my perspective, I'm fine rolling the spec back to how it was before I "helped22:10
ildikovscottda: as much as I saw Nova calls terminate_connection now along with detach22:10
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scottdaildikov: That's correct. but they are 2 separate calls. And I'm fine with Nova calling terminate_connection for each instance of a volume being detached...22:12
scottdait seems the only way to deal with drivers that export a new lun for each attach of the same volume22:12
scottda(or add a bunch or really complex code on the nova side to check this)22:12
ildikovscottda: Nova folks would be really sad by adding more complexity to the code22:13
scottdaI certainly don't like the idea of sad Nova folk22:13
scottdaI think that it will be easier to have Cinder deal with the complexity. And mostly because of the aforementioned sadness.22:14
scottdaIn which case I'd guess your spec might not need to be changed. As long as hemna doesn't see a problem.22:15
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ildikovscottda: single responsibility is a good thing in theory and I think in steps we can move the parts where they belong22:15
scottda(Not that he needs to deal with the Cinder changes)22:15
smcginnisildikov: +122:15
ildikovyou know in amounts of sadness that can be handled at a time :)22:15
smcginnisildikov: Evenly spread the sadness. :)22:16
openstackgerritKendall Nelson proposed openstack/cinder: Adding devref about genconfig
scottdaYeah, push some sadness out to summer time.22:16
ildikovsmcginnis: exactly :)22:16
diablo_rojosmcginnis: ^^22:17
smcginnisdiablo_rojo: Already open in a tab.22:17
diablo_rojosmcginnis: Ninja fast today.22:17
ildikovscottda: sunshine makes it easier to handle22:17
smcginnisSorry, I'll be online later. I'll watch for any nova-spec update and make sure I weigh in as soon as I can.22:18
scottdaYeah, I'm ready to +1 as well.22:18
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ildikovscottda: smcginnis: I can go and revert to patch set #12 and add a link to the log of this discussion and hemnafk can check it also, when he's back from his meeting22:20
alkhodHi everyone. I have an issue with attaching nfs volume to instance. The only traceback I could find in logs was in n-cpu. Here is the link Any thought on this would be great (I am totally stuck here), thanks in advance. Hope this is a correct channel to ask...22:20
scottdaildikov: Sounds good. I'll remind hemnafk to look, if you need to be done for the day.22:21
ildikovI can also add a comment on considering to move to the direction of what is outlined in patch set #13, but in a step-by-step approach22:21
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ildikovscottda: I upload the spec now, then take a shower, if hemnafk is not back by then, I would really appreciate if you do this favor for me :)22:22
bardiaalkhod: What driver backend are you using?22:23
ildikovscottda: smcginnis: hemnafk: thanks all for the chat and clarifications!22:23
alkhodbardia: I have this error using generic nfs22:23
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alkhodbardia: which tells me this is probably a backend issue, but I can't find out what could this be. The error output is kinda not really informant22:25
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scottdaildikov: Thanks for the work and perseverance.22:30
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ildikovscottda: np, we're trying to get this done for too long to just simply let it go22:32
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bardiaalkhod: sorry not really familiar with the nova side. If your volume is created and you can see it then I'm assuming its a nova issue22:34
openstackgerritChris Morrell proposed openstack/cinder: Address potential races in SolidFire VAG.
bardiaalkhod: maybe someone else here has seen this. I would try #openstack-nova as well22:35
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alkhodbardia: ok, thank you, will try asking on nova channel too22:36
openstackgerritHelen Walsh proposed openstack/cinder: EMC VMAX - get_short_host_name not called in find_device_number
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hemnasorry guys, had a meeting22:37
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ildikovhemna: np, I've just uploaded a new version of the spec22:42
hemnaildikov, ok22:43
openstackgerritxing-yang proposed openstack/cinder: Add a FakeGateDriver
ildikovhemna: I basically reverted to patch set #12 and addressed your cinderclient comment and scottda's comment about the docs with data corruption22:43
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hemnaok sounds good.22:43
hemnasorry about all of this22:43
hemnathere are probably going to be issues with either approach really.22:44
ildikovhemna: no problem, I think it's important to get to the same page and it usually takes some time and effort22:44
xyangjgriffith: I moved it to the fake_driver:
ildikovhemna: I think so too, this is why I'm more on the side of starting with the original intention and then fix things22:44
jgriffithxyang: cool, that' looks good22:45
hemnaildikov, ok sounds good.22:45
xyangjgriffith: I can't log warning messages any more as there's a hacking check that prevents any logs in unit tests22:45
jgriffithxyang: :(22:45
ildikovhemna: I will link the log for this IRC discussion to the review too22:45
jgriffithalthough I think that's partially my fault22:45
hemnaildikov, ok that's probably a good idea :)22:45
xyangjgriffith: this one have "Fake" in its name, I hope that is clear enough:)22:45
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ildikovhemna: we can add a follow up spec later if we decide to handle the attach/detach/terminate_connection on the host level way22:46
hemnaildikov, ok thats good.  we may eventually end up there22:46
jgriffithxyang: :)22:46
hemnaas long as we aren't painted into a corner22:46
jgriffithxyang: at some point I guess we need to fix up the mess of fake drivers too22:46
ildikovhemna: that refactoring should be transparent to the user anyway22:46
hemnaildikov, +!22:47
xyangjgriffith: I wonder why we have so many of them22:47
jgriffithxyang: at least FakeLVM is gone and LoggingDriver is gone22:47
hemnaildikov, thank you so much for working on this.  much appreciated!22:48
hemnaildikov,  I tried a few times22:48
xyangjgriffith: are they?22:48
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jgriffithxyang: haha.. I think so :)22:48
ildikovhemna: I cannot guarantee this time either, but at least we have a better view on where and how we want to go22:48
xyangjgriffith: oh, they are in driver.py22:49
hemnaildikov, ok if there is anything else I can help with, please let me know.22:49
xyangjgriffith: just noticed that22:49
hemnatesting, etc.22:49
jgriffithxyang: who would know anymore... there's like 20 classes in there now :(22:49
xyangjgriffith: ya, it is hard to navigate it:(22:50
jgriffithxyang: worst thing EVER!22:50
xyangjgriffith: I agree it is very confusing22:50
ildikovhemna: scottda: smcginnis: please check the spec review and add your votes there so that I can ping Nova folks tomorrow22:51
ildikovhemna: sure, will do, thanks!22:51
jgriffithxyang: so one thing I wonder....22:51
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jgriffithxyang: not for your patch...22:51
jgriffithxyang: but at some point in the future, should we just collapse all those fakes in fake_driver into a single "class FakeDriver"22:51
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xyangjgriffith: sure, that sounds good22:52
jgriffithxyang: some of those honestly I don't think have any business being in there anyway22:52
jgriffithxyang: ok.. maybe I'll actually work on it :)22:52
xyangjgriffith: :)22:52
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SwansonSoooo.....  I do a replication-failover.  Volume is on the new backend.  host seems right(ish).  volume_type is the original volume_type.22:56
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openstackgerritMerged openstack/cinder: Port Windows drivers to Python 3
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tbarronjgriffith, xyang: FakeVD ABC23:13
* tbarron ducks23:13
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xyangtbarron: we can easily add 20 of those:)23:14
tbarronxyang: -)23:14
hemnaFake Fakes23:14
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tbarronclass PseudoFakeVD(FakeVD):23:15
tbarronhemna's idea I thingk ^^23:16
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tbarronok, I'll stop now23:16
openstackgerritMerged openstack/cinder: Fix dictionary key error
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jgriffithtbarron: I'll get you for that!23:25
tbarronjgriffith: thank you, thought you just didn't notice.23:26
jgriffithJust delayed, ina meeting23:26
tbarronsorry to hear that23:27
xyangjgriffith, tbarron: maybe we should have a class navigator, just like the project navigator:)23:30
jgriffithxyang: LOL23:30
jgriffithxyang: I kinda think we need one23:30
tbarronxyang: :)23:32
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openstackgerritBardia Keyoumarsi proposed openstack/cinder: Volume driver for Coho Data storage solutions
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openstackgerritAlex O'Rourke proposed openstack/cinder: 3PAR: Implement v2 replication (managed)
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openstackgerritAlex O'Rourke proposed openstack/cinder: 3PAR: Implement v2 replication (unmanaged)
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