Friday, 2015-11-20

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openstackgerritNate Potter proposed openstack/cinder: Show qos_specs_id based on policy
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openstackgerritEdwin Wang proposed openstack/cinder: FlashSystem reports error in _find_host_exhaustive()
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openstackgerritLisaLi proposed openstack/cinder: Delete unused codes in rbd.retype
openstackgerritMerged openstack/os-brick: Updated from global requirements
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openstackgerritZhang Ni proposed openstack/cinder-specs: Add local tgt to lvm When the instance is in the same host with LVM volume, it's better to use local dev ( eg. /dev/ubuntu50-vg2/volume-9531dcba-16c5-4f1f-8b61-f0043d0b6a15) of lvm volume for high performence. So this blueprint will add a local tgt for LV
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mriedemanyone know tomoki sekiyama?02:03
jgriffithmriedem: yes02:03
openstackgerritThang Pham proposed openstack/cinder: Update replication to use versionedobjects
jgriffithmriedem: just taking a poll? :)02:04
mriedemjgriffith: wondering if they are still working on
mriedemdidn't know irc nick02:05
jgriffithHe's tsekiyama02:06
jgriffithI usually see him around in the mornings02:06
jgriffithbut I must admit I haven't caught up with him here in quite a while02:06
jgriffithmriedem: I'll keep an eye out for him02:07
jgriffithmriedem: else maybe we should reassign that work02:07
mriedemthat's fine, i just asked in the change02:07
mriedemi'm going through old reviews and looking for abandons02:07
jgriffithmriedem: good deal02:08
openstackgerritZhang Ni proposed openstack/cinder-specs: Add local tgt to lvm
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lixiaoy1mriedem: ping02:35
lixiaoy1mriedem: As both Cinder and Nova need nova/volume/encryptors, I am adding this part to os-brick02:36
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mriedemlixiaoy1: are you referring to ?02:37
lixiaoy1please have a look at
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mriedemoh boy02:38
mriedemso that needs a blueprint i think02:38
mriedemjgriffith: ^02:38
mriedemsmcginnis: ^02:38
mriedemhemna: ^02:38
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smcginnismriedem: Agreed02:38
mriedemspecifically b/c before nova is going to consume that, nova has to integrate the privsep stuff02:38
mriedemfor rootwrap filters02:38
mriedemthat came up in the nova meeting today02:39
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smcginnismriedem: Are you going to privsep already?02:39
lixiaoy1I asked Sean, and he thinks this is just moving to os-brick. no need bp02:39
smcginnisMoving where things are, but a bp might be good to make sure all users (cinder and nove) understand what's going on.02:40
mriedemsmcginnis: sdague said in the nova meeting today that nova will have a bp for tracking the privsep work that has apparently landed in oslo but hasn't been released yet02:40
mriedemwe have to get going on that earlier than later probably02:40
mriedemotherwise we're going to have to keep duplicate rootwrap filters02:41
smcginnismriedem: Ah, cool. I've been taking a wait and see approach.02:41
mriedemmikal was going to follow up with gus on the bp work in nova02:41
smcginnismriedem: I'm a little nervous picking it up right away before anyone has worked it out.02:41
mriedemearly adopters :)02:41
smcginnismriedem: I'll let Nova do that. :D02:41
mriedemyou bastard!02:41
lixiaoy1smcginnis: you mean let Nova maintain rootwrap filters02:42
smcginnislixiaoy1: No, apparently the plan is to get rid of rootwrap faster than I thought would happen.02:42
smcginnismriedem: You'd like lixiaoy1 to submit a bp on the nova side, right?02:43
lixiaoy1I have a bp in cinder02:43
smcginnislixiaoy1: Right, but nova changes will be required as well, right?02:44
lixiaoy1early, I mean no spec is wroten02:44
smcginnisIIRC, the plan is to have both nova and cinder use the encryptors from os-brick rather than copy them between both, right?02:44
lixiaoy1I will put encryptors in os-brick, and later nova will be changed to call02:44
smcginnislixiaoy1: So I think getting them in os-brick - you are all set.02:45
mriedemnova will need a compainion bp yes02:45
smcginnislixiaoy1: But in order to update nova to use them, you will need a bp there for that piece of work.02:46
lixiaoy1this is bp in cinder:
mriedembut i think the nova team should have input on the blueprint/spec for this, i.e. why it's needed and what the plan is02:46
smcginnismriedem: OK, cool.02:46
mriedemalso noting that os-brick has historically really been only the pieces of nova that have been in the libvirt driver in nova,02:46
mriedemthe volume encryptor stuff is not necessarily libvirt specific02:46
smcginnislixiaoy1: Can you submit one now, even if things aren't quite ready to make any changes there yet?02:46
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mriedemalthough i feel like there are assumptions made that they are used together (since no other virt driver supports encrypted volumes from what i can tell)02:47
smcginnismriedem: Yeah, this may be a slight expansion of scope.02:47
mriedemposting this to the -dev list would be good too as a heads up for nova people, this is the first i've heard of it02:47
smcginnismriedem: It's kind of another rootwrap/copy the same stuff everywhere kind of situation.02:47
smcginnismriedem: Good idea re: -dev.02:48
smcginnislixiaoy1: Can you post something to the mailing list giving an overview of what is being doen.02:48
lixiaoy1ok, I will do it02:48
smcginnislixiaoy1: Put [Cinder] and [Nova] in the subject line so both teams pay attention to it.02:48
smcginnislixiaoy1: Thanks!02:48
smcginnislixiaoy1: I think it makes sense, but mriedem is right, we should probably make sure everyone is aware and understands what's being proposed.02:49
lixiaoy1I will02:49
smcginnisAwesome, thank you.02:50
lixiaoy1my pleasure02:50
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openstackgerritMitsuhiro Tanino proposed openstack/cinder: Robustify writing iscsi target persistence file
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openstackgerritMitsuhiro Tanino proposed openstack/cinder: Robustify writing iscsi target persistence file
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openstackgerritMitsuhiro Tanino proposed openstack/cinder: [WIP] Robustify writing iscsi target persistence file
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smcginnishemna: Question about bug 1487169...03:15
openstackbug 1487169 in os-brick "multipath -l can be very slow " [Medium,In progress] - Assigned to Walt Boring (walter-boring)03:15
smcginnishemna: You got a patch in that said it was a partial fix.03:15
smcginnishemna: Wondering what else we can do there?03:15
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openstackgerritThang Pham proposed openstack/cinder: Register RPC and object versions
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yusukeHi all, excuse me. Do you know alternative url or web site of following url? Although I know how to setup Cinder CI for FibreChannel Protocol, this link looks dead....05:10
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openstackgerritxing-yang proposed openstack/cinder: Add a GateDriver
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yusukes/Although I know how to/Although I want to know how to/05:23
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openstackgerritMerged openstack/cinder: VNX: Fix metadata get overriden issue
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openstackgerritLisaLi proposed openstack/os-brick: Copy encryptors from Nova to os-brick
openstackgerritCedric Zhuang proposed openstack/cinder: VNX: Get volume type from location throws error
openstackgerritLisaLi proposed openstack/os-brick: Copy encryptors from Nova to os-brick
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openstackgerritMerged openstack/cinder: Remove .mailmap file
yusukeI'm sorry. I found alternative one, thanks.06:07
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openstackgerritPeter Wang proposed openstack/cinder: VNX: Fix failure in SnapCopy feature
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openstackgerritwanghao proposed openstack/cinder-specs: Improvement to query consistency group detail
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openstackgerritPeter Wang proposed openstack/cinder: VNX: Fix failure in SnapCopy feature
openstackgerritOpenStack Proposal Bot proposed openstack/cinder: Imported Translations from Zanata
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openstackgerritzhangsong proposed openstack/cinder: Fix the bug of can't get the desired image info
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openstackgerritzhangsong proposed openstack/cinder: Fix the bug of can't get the desired image info
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DhavalI have installed Openstack on single machine using devstack08:07
DhavalI am trying to develop sample third party driver for cinder for POC purpose08:07
DhavalBut not sure where should I start from08:08
DhavalCan anyone please guide me about procedure to register sample cinder driver with openstack08:09
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dulekDhaval: Maybe this will be helpful:
Dhavaldulek : Thanks for sharing link08:18
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DhavalI am actually trying to implement sample cinder driver which could add/delete volumes just like LVM driver08:21
DhavalI even modified cinder.conf file as follows and restarted cinder-api, cinder-scheduler and cinder-volume services08:22
Dhavalfollowing contents were added in cinder.conf file:08:22
Dhavalenabled_backends = lvmdriver-1,lvmdriver-208:22
Dhaval[lvmdriver-2] volume_group = stack-volumes-lvmdriver-2 volume_driver = cinder.volume.drivers.lvm.LVMVolumeDriver volume_backend_name = lvmdriver-2                                                                                                                               26,1          Bot08:23
DhavalEven after restarting the cinder services; I am unable to see lvmdriver-2 in cinder service-list output08:23
openstackgerritFalk Reimann proposed openstack/cinder: Don't add project_id to auth_url in SwiftBkpDriver
dulekDhaval: Take a look into the logs of c-vol. If driver was unable to be initialized, then c-vol won't report it's presence.08:24
dulekDhaval: LVM is uninitialized when for example volume_group doesn't exist.08:24
dulekDhaval: You may also let DevStack configure everything for you.08:25
dulekDhaval: Just add this to local.conf:08:25
dulekDhaval: CINDER_ENABLED_BACKENDS=${CINDER_ENABLED_BACKENDS:-lvm:lvmdriver-1,lvm:lvmdriver-2}08:25
Dhavaldulek : Okay, let me try it out08:26
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openstackgerritFalk Reimann proposed openstack/cinder: Adds Auth Version 3 support in Swift Backup Driver
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smcginnisyusuke: Please feel free to edit that wiki page with the correct link. Thanks!09:18
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yusukeOK, Thanks!09:19
smcginnisyusuke: Thanks for pointing it out!09:20
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Dhavaldulek : Thanks a lot for helping out. I am now able to see both lvmdriver-1 and lvmdriver-2 in cinder service-list output09:27
Dhavaldulek : had to create volume group for successful initialization09:27
dulekDhaval: You're welcomed.09:28
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openstackgerritTobias Urdin proposed openstack/cinder: Correct small misses in debug output for cinder-volume-usage-audit. Fixes variables not being included in output. Changed according to comments.
flip214help, please. with the LVM driver the "os-vol-host-attr:host" volume attribute includes the host, service, and backend; with my own driver only the host is listed.09:53
flip214I believe this is the reason for initialize_connection() (etc.) failing.09:54
flip214what is my driver missing that the LVM driver does, so that the "os-vol-host-attr:host" attribute gets filled in correctly?09:54
flip214The "class Volume_host_attribute" in cinder/api/contrib/ should be used for all backends, as I understand it.09:55
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openstackgerritSzymon Wr√≥blewski proposed openstack/cinder: Tooz locks
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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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Rekhahi all10:37
Rekhawhen volume creation from image is getting failed. when i checked in cinder-volume.log i could find this "TRACE cinder.volume.manager ImageCopyFailure: Failed to copy image to volume: Unable to find a Fibre Channel volume device."10:40
Rekhacan anybody help me out in resolving the issue...10:41
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Rekhacan anybody point out the reason for failure?10:41
openstackgerritFalk Reimann proposed openstack/cinder: Adds Auth Version 3 support in Swift Backup Driver
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openstackgerritMerged openstack/cinder: Imported Translations from Zanata
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openstackgerritMerged openstack/cinder: Manage existing: fix volume object saving
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nikeshmRekha: what type of setup are yu using?11:16
nikeshmopenstack or devstack11:16
nikeshmwhat volume driver are you using11:17
openstackgerritMitsuhiro Tanino proposed openstack/cinder: Robustify writing iscsi target persistence file
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openstackgerritMichal Dulko proposed openstack/cinder: Eager load columns in volume_get_active_by_window
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Rekha@nikeshm openstack setup and hp3parfcdriver12:12
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nikeshmRekha : then i think some packages might be missing12:23
nikeshmregarding FC12:24
nikeshmon the node12:24
nikeshmbetter check hp3parfcdriver guide12:24
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Rekha@nikeshm on wic node you are talking men on storage node12:25
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Rekha@nikeshm *you mean on storage node12:25
nikeshmRekha: ya i think so12:28
nikeshmor may be on controller node12:29
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nikeshmRekha : not sure better wait for hp guys hemna DuncanT kmartin12:30
Rekha@nikeshm thank you12:31
nikeshmRekha: are you able to create FC volumes and attach FC volumes12:31
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Rekhai able to create empty fc volumes but not able to attach this created volume to instance12:33
nikeshmRekha: thats the issue12:33
Rekha@nikeshm but on same 3par storage array i able to create ISCSI volume from image and attach to instance also12:34
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Rekha@nikeshm how this issue can be resolved..12:35
nikeshmRekha: why the error are you getting when try to attach FC volumes12:36
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nikeshmplease check nova-compute logs12:37
nikeshmany Traceback12:37
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nikeshmRekha: please paste Traceback in compute logs while attaching FC volume in a pastebin and share to us12:40
nikeshmsmcginnis: how is parris, be careful there12:41
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Rekha@nikeshm I am not getting any information in nova logs12:47
nikeshmRekha: are you checking on compute node12:47
nikeshmi mean where nova-compute service is running12:48
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Rekha@nikeshm sorry i was checking on the controller node12:50
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openstackgerritFalk Reimann proposed openstack/cinder: Adds Auth Version 3 support in Swift Backup Driver
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Rekha@nikeshm traceback is pasted here13:00
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nikeshmRekha: hmm. is any other?13:02
openstackgerritFalk Reimann proposed openstack/cinder: Adds Auth Version 3 support in Swift Backup Driver
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dulekAnyone aware on the status of HPE CI?13:12
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nikeshmRekha: hmm better wait for hemna kmartin DuncanT13:16
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Rekha@nikeshm okay13:25
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eikkewhat's the procedure to remove things from rootwrap filters? As in, how can you be sure not to remove things others depend on?13:34
openstackgerritGorka Eguileor proposed openstack/cinder: Add atomic conditional updates to objects
openstackgerritGorka Eguileor proposed openstack/cinder: Move get_by_id to CinderObject
openstackgerritGorka Eguileor proposed openstack/cinder: Improve metadata update operations
openstackgerritGorka Eguileor proposed openstack/cinder: Remove API races from attach and detach methods
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lyarwoodhemna: looks like our `DIE DIE DIE` spam in finally worked :)14:17
gouthamrlyarwood: for a random lurker, what is DIE DIE DIE all about?14:20
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openstackgerritEric Harney proposed openstack/cinder: Add --checkopts to "pep8"
jgriffithgouthamr: apparantly it's top secret14:27
jgriffithgouthamr: honestly I'm not quite sure either suspect it's CI recheck related but unclear14:28
gouthamrjgriffith: hah. wanted to join the spamming... :P14:30
jgriffithgouthamr: :)14:30
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scottdagouthamr: People are always asking each other in this channel "How do I initiate a recheck on your CI system?" and someone mentioned that it would be great if you could do this by saying "DIE DIE DIE". It was a joke.14:31
scottdaBut there is probably some value in having a single command for this, to avoid having to ask each vendor the syntax.14:32
jgriffithscottda: oh, really?14:32
scottda"DIE DIE DIE" is a bit violent for my taste.14:32
jgriffithscottda: umm... what happened to "recheck <ci-name>"14:32
scottdajgriffith: I don't know. It just came up one day and I think it was patrickeast how changed his CI to allow the DIEDIEDIE to work.14:33
jgriffithscottda: and so that means everybody that listens for DDD does a recheck needed or not?14:33
jgriffithscottda: well alrighty then :)14:33
jgriffithscottda: thanks for the explanation :)14:33
scottdano, it's still just a joke.14:33
gouthamrjgriffith: too mainstream. We don't want mainstream. We're the new kids on the block. 8)14:34
scottdaPersonally, I think you storage vendors are all crazy.14:35
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gouthamrscottda: :D okay, I take that as a compliment. :)14:36
scottdageguileo: dulek Hi. Is there an etherpad that gathers all the info, specs, and patches for Active-Active HA?14:37
jgriffithscottda: LOL14:37
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lyarwoodgouthamr: haha sorry went AFK, I honestly didn't know the background for `DIE DIE DIE`, I just saw hemna using it on my change and asked :)14:51
dulekscottda: Not the etherpad, but you may find related patches here:,n,z14:51
dulekscottda, hemna: Speaking of CIs - what's up with HPE one?14:52
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scottdadulek: Thanks for the pointer to patches.14:56
scottdadulek: I don't know about HPE CI. I'm just a Helion distribution guy. HPE Storage is another world.....14:57
dulekscottda: Ah, sorry for mistaking that then.14:58
scottdadulek: I'm wondering if there's a way to help move these HA/AA specs and patches along better? I think it's hard for reviewers to figure out what to look at just from that list of patches.14:58
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dulekThere's a main one here: It explains all the subsequent specs.14:59
dulekMaybe an etherpad would work, I don't know. I always felt that etherpads tend to get updated.15:00
scottdaYeah, that kinda works. But still doesn't give any ordering to help reviewers. It can kind of be figured out with dependencies.15:00
scottdaI'm just thinking that at this rate, we won't have HA/AA in Mitaka. Spec approval is pretty slow, and then there are the patches...15:00
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scottdaThat's 8 specs on that list ^^^ !15:02
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dulekI'm a little behind on geguileo's updates in specs. I'll try to sync up and maybe come up with something.15:03
asselindulek, hpe ci seems to be failing lefthand-iscsi-driver-master-client-pip-vsa125http-dsvm, otherwise looks ok to me15:03
scottdaYeah, I'm not sure of the answer. I've  teammates working on testing the patches, and they were pretty confused about the dependency chain.15:04
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dulekscottda: It's more like specs reviews work now, not much implementation. I was focusing on upgrades for M-1, I'll try to work more on A/A next week.15:06
gouthamrlyarwood: Nice. Thanks :)15:07
scottdacool. I'm mostly out next week, but I'll attend the Cinder meeting Wed. Maybe one of us can add info to the spec priority page and nag people to review:
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openstackgerritEdwin Wang proposed openstack/cinder: FlashSystem reports error in _find_host_exhaustive()
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patrickeastjgriffith: haha yea so that die die die thing was a joke, but kind a of symptom of folks confused by how to recheck since not all the ci's respond to recheck <ci name>15:32
jgriffithpatrickeast: got it :)15:32
patrickeastPlus lots, including Jenkins get triggered by that format15:33
jgriffithpatrickeast: a number of folks seem to have been having fun putting it in comments15:33
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patrickeastLol yea I added it as an extra way to do it, zuul makes it trivial to add more trigger regexs15:33
jgriffithI'll just stick with "recheck solidfire" for now15:34
patrickeastSeems to be a hit though... Gets more action than the real recheck syntax now15:34
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jgriffithpatrickeast: yeah, it's QUITE popular with all the kids these days15:34
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tbarronso I dunno but I've been told that 'recheck <backend>-ci' can trigger more than just the CI for that backend.  True?15:36
tbarronpatrickeast, jgriffith ^^^: I think that's why we do 'run netapp-ci'15:37
jgriffithtbarron: apparantly so can "DDD" :015:37
tbarronjgriffith: yeah :-)15:37
jgriffithtbarron: actually it's "recheck-<ciName>"  so Jenkins doesn't catch it15:37
jgriffithtbarron: yes, you're correrct, if there's whitespace after the "recheck" it will grab it15:38
jgriffithtbarron: anywho... DDD seems popular and seems to work so whatevs :)15:38
tbarronjgriffith: kk, I guess we did 'run ...' just to reduce the probability of people putting a space in there.15:38
jgriffithtbarron: yeah, that was another bike-shedding argument one day a while back15:39
jgriffithtbarron: I'd prefer not to re-live :)15:39
tbarronjgriffith: 'nuf said15:40
jgriffithtbarron: :)15:40
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openstackgerritMichal Dulko proposed openstack/cinder-specs: Add Tooz locks to support A/A HA spec
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geguileoscottda: dulek In theory this should have them15:49
geguileoBut I'll check now that it is up to date and maybe structure it a little bit better15:49
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scottdageguileo: Which should have them?15:53
geguileoUpdating it now15:54
scottdaok, cool.15:54
geguileoBut I'm updating it now15:54
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kmartinnikeshm, are you still have issues?16:12
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kmartinnikeshm, could be one of a few problems, either you don't have the required FC packages, on your compute node or your SAN fabric is not zoned correctly. Are you using the fibre channel zone manager?16:17
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openstackgerritScott DAngelo proposed openstack/python-cinderclient: api-microversion support for python-cinderclient
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duleke0ne_: Coverage for cinder/image/ : 94%16:47
e0ne_dulek: hi. not bad:)16:47
duleke0ne_: That's why I haven't noticed, but yes, I was curious. ;)16:47
e0ne_dulek: thanks for review! I'll update patch with lost tests16:48
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dulekxyang1: Hi! You're rechecking EMC VNX because it failed on volume_metadata aliases patch, or just to trigger it?17:00
xyang1dulek: I was just triggering it to test your patch17:00
xyang1dulek: but the other patch is already merged so this won't really test your change17:01
dulekxyang1: Yes, that's why I've asked for testing. But don't bother, through the weekend I'll post a DO-NOT-MERGE change dependent on mine that's removing Peter's fix and trigger VNX CI there. This should make me sure on my patch. :)17:03
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xyang1dulek: sure, that is way to do it:)17:03
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xyang1dulek: I have asked Peter to test your patch but he is in. different time zone17:04
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openstackgerritMichal Dulko proposed openstack/cinder: Fix debug output for cinder-volume-usage-audit
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openstackgerritFalk Reimann proposed openstack/cinder: Add Auth Version 3 support in Swift Backup Driver
openstackgerritFergal Mc Carthy proposed openstack/cinder: Refactor SRB Unittest LVM command handlers.
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openstackgerritNate Potter proposed openstack/cinder: Move quota checks from manager to API
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openstackgerritRyan McNair proposed openstack/cinder: Deprecate *_multipath_enabled flag for IBM drivers
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smcginnisdulek, scottda: This would be a great place to start capturing more HA links and info:
smcginnisMaybe not everything, but at basis for where to start.18:03
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hemnasmcginnis, not sure anyone in Cinder is aware of this change in Nova, but FYI:
hemnaLooks like Nova is trying to move the iSCSI volume support into qemu18:04
hemnawhich doesn't support multipath at all18:04
smcginnisHuh, that's an interesting approach. :[18:04
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smcginnisAnd it's not even supported by the qemu version in ubuntu.18:05
hemnasure would have been nice to have someone from Cinder review this before it merged18:06
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smcginnisYeah, kind of surprised we're just finding out about it.18:06
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smcginnisWhere's our nova liason!! :)18:06
smcginnisBut that was quite a while ago.18:06
hemnasmcginnis, did you see the mailing list post about the encryptors patch in os-brick ?18:07
smcginnishemna: Yep, I had asked (well, Matt R did first) to have something posted there.18:07
hemnaDaniel seems to want to move Nova into doing all attachments directly w/ qemu18:07
smcginnishemna: We had discussed in reviews here, but nova should know what we're doing.18:07
* smcginnis thinks and vice versa :/18:08
hemnaI'm not sure qemu can handle all of the h/w initiators that os-brick supports18:08
hemnaand there is no FC support18:08
hemnaand there is no multipath support18:08
smcginnishemna: I don't get it. What is the advantage of using qemu? Seems severely limited with no big win from what I see.18:08
hemnaI also found that18:09
hemnakinda hints at some of their 'issues'18:09
hemnabut I'm not sure I'm buying it18:09
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smcginnisOh! So the volume isn't attached to the nova host. Directly to the guest VM?18:10
smcginnisI'm still confused.18:10
tbarronunless I'm missing something, there are backends that won't work right without multipath support ...18:10
smcginnistbarron: It definitely could cause problems.18:11
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hemnawell it's attached to qemu18:11
hemnathey create a virsh/qemu/kvm pool18:11
smcginnisEven with one initiator, on ours we can have multiple front end ports configured that would result in multiple paths.18:11
hemnaand hand that to the guest.18:11
tbarronwe have backends that use multipath for controller failover.  And another backend that load-balances over multiple paths.18:11
hemnathis goes against the idea of multipath entirely18:11
smcginnishemna: So to get to qemu, isn't that exposing it to the host? You would still hit a LUN limit.18:12
tbarronimage copies etc. have problems unless the 'use_multipath' options are configured in nova libvirt.18:12
hemnayah I think so18:12
smcginnisWell... maybe the problem will fix itself because anyone who tries to use this will have problems.18:13
smcginnisSo they won't use it and it will go away.18:13
tbarronyeah, it's a nova.conf option, not default.18:13
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hemnaqemu has no concept of FC18:14
tbarronand maybe it has its uses18:14
smcginnistbarron: Well, that's good news at least that it's not default. That could really screw up some deployments.18:14
smcginnistbarron: Maybe. Limited though.18:14
smcginnisI still don't see the benefit.18:14
hemnayah I'm grasping at it myself18:14
hemnayou lose all h/w initiator support18:15
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hemnaand force qemu to do all the iSCSI work, which is less than ideal.18:15
smcginnismriedem isn't online. I wonder if he knows anything about this. He's pretty good on the storage side of nova.18:15
hemnasmcginnis, I don't see daniel either.  berrange ?18:16
smcginnishemna: Right, why use a well established and featureful iSCSI initiator. Throw it all on qemu.18:16
smcginnisscottda: Maybe something you can bring up with nova, Mr. Liason? :)18:16
hemnaoh maybe it's danpb ?18:17
xyang1the doc says volume_drivers = iscsi=nova.virt.libvirt.volume.LibvirtNetVolumeDriver18:17
hemnaxyang1, yah, and they modified the netvolumedriver to support iscsi18:17
hemnabut only for single path18:17
hemnaand cinder drivers are going to get the initiator information from the host18:17
hemnawhich has it's iqn and multipath=True/False18:18
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hemnaso some backends are going to export as if it's multipath enabled18:18
hemnabut only get 1 path connected.18:18
hemnathat's bad mmmkay18:18
smcginnisProblem Description: The VMs on a compute node will be stopped when an iSCSI volume is attached or detached to a VM and it causes the host OS crash.18:19
smcginnisThere are some fundamental misconceptions here, I think.18:19
hemnayah I saw that too and thought...what?!18:20
hemnathat simply doesn't happen18:20
smcginnisThat whole list under Problem Description has me confused.18:20
xyang1wonder what backend they tested with to come up with that problem description18:21
hemnalvm ?18:21
smcginnismriedem: You're here now!18:21
smcginnismriedem: Don't suppose you've seen any of the scrollback?18:21
mriedembeen at lunch for the last hour18:21
smcginnismriedem: We're a bit puzzled by
smcginnismriedem: Wondering if you have any innsight on it.18:22
smcginnisWas about to ask on -nova, but since you're back from lunch... :)18:22
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hemnathe other downside is that extending an attached volume will never work in that scenario18:23
mriedemsmcginnis: puzzled how?18:23
smcginnismriedem: Main points being, it seems to have some fundamental issues and unclear advantage as to why.18:23
mriedemi remember pointing out long after it was in tree that the dependency story sucks18:23
smcginnismriedem: Everything under Problem Description doesn't appear to be accurate.18:23
mriedemyou have to build your own qemu18:24
smcginnisYa, there's that too.18:24
hemnamriedem, so what brings this up is the whole ML discussion about the encryptors support18:24
smcginnisOr hey, just rewrite qemu and compile it into your kernel while you're at it.18:24
smcginnisSorry. :)18:24
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hemnait looks like Daniel wants to move all volume attaches to this mechanism eventually18:24
hemnathere are some serious downsides to doing this18:25
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hemna1) no h/w initiator support.  2) No multipath support 3) no extending attached volumes support 4) no fibre channel support 5) no vendor based transports support18:25
smcginnisLooks like different discussion going on in -nova at the moment.18:26
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hemnaI wonder if multiattach would even work as wel18:27
mriedemok i'm not up to date on the ML thread yet either18:27
smcginnishemna: Doesn't look like it.18:27
hemnamriedem, what you don't read the ML at 3am?18:27
mriedemwhat was wrong with the spec again?18:27
mriedemi do, just haven't gotten to that one yet18:27
mriedemlots of plates spinning18:27
smcginnismriedem: I think hemna summed it up well a few lines back.18:28
mriedemi'm all for ripping crappy stuff out of nova18:28
smcginnismriedem: There are definite "shortcomings" with this approach.18:28
mriedemwhich is "1) no h/w initiator support.  2) No multipath support 3) no extending attached volumes support 4) no fibre channel support 5) no vendor based transports support"18:28
smcginnismriedem: And questionable motivation for needing it.18:28
smcginnismriedem: Yeah, those are some of the issues with it.18:28
mriedemi seem to remember the reason for that spec was to just keep some gorp out of the host to make debugging easier18:29
hemnaso it looks like that code made it into the split out libvirt drivers18:29
hemnaso it's still there.18:29
mriedemand possibly some performance thing, but i never reviewed that before it went in18:29
mriedemit's in os-brick you mean?18:29
hemnathat guy landed back in Feb.18:30
hemnaand it's still in the 'new' libvirt/volume/ code18:30
hemnaso I guess there is 2 issues here really18:30
hemnathe existing patch
mriedemit even says no multipath in the commit message18:30
hemnaand 2) the direction that "Nova" wants to go in the future wrt volume attaches18:31
mriedem"3) no extending attached volumes support" wasn't a thing when this was added to nova right?18:31
hemnamriedem, correct18:31
mriedem(4) could be added for fibrechannel i'd think?18:31
hemnaI bring it up now, because I'm working on os-brick code to add that ability18:31
smcginnismriedem: Yeah, not really at the time.18:31
smcginnismriedem: But it prevents adding support for that. And possibly other betterness in the future.18:32
hemnathat's my WIP that I'm testing now to add the ability to resize attached18:32
mriedemfwiw, the if statements in make me said18:32
mriedemif that helps18:32
hemnathat one...not the spec :P18:32
hemnamriedem, yah I saw that as well. that seems like a painful way to go, long term18:33
hemnaeventually everything will be a big if/then/else18:33
mriedemok, so what i'm hearing is this very niche thing that you have to build your owen qemu for (on trusty at least), and with little gain (makes mgmt / debug easier for ops?), is blocking cinder from doing things it wants to do with volume resize18:34
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mriedemplus it doesn't support multipath and fibre18:34
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smcginnismriedem: Yeah. And we otherwise generally thing it's a Bad Thing to do for end users.18:35
hemnano idea how you'd be able to debug failed attaches/detaches18:35
mriedembad thing b/c of not knowing how to debug attach/detach failures?18:35
mriedemor the multipath/fibre limitations?18:35
hemnayes :)18:36
smcginnisD: All of the abobe18:36
* smcginnis can't type tonight. Must be the wine.18:36
mriedemwhere are you?18:36
smcginnismriedem: Paris :)18:37
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smcginnisDoing code reviews on my anniversary. Good thing my wife is jetlagged. :)18:37
mriedemso you guys have raised this all in the ML and danpb said it's not a problem and you're crazy and i should just go read the ML?18:37
openstackgerritNate Potter proposed openstack/cinder: Move quota checks from manager to API
smcginnismriedem: Was thinking that's probably our next step.18:38
mriedemoh, well if you haven't raised it in the ML yet, please do18:38
smcginnismriedem: Was just curious if you had any extra insight, cuz we certainly didn't.18:38
mriedemi'm definitely not an expert on this specific thing18:38
hemnano I haven't made a post on the ML about it yet18:38
mriedemno, like i said, i stumbled on this spec long after it was merged,18:38
hemnajust discovered it like 15 minutes ago18:38
mriedemand i was raising some hell about the 'bring your own qemu' limitatoin18:38
smcginnismriedem: Yeah, thanks for you're input though.18:38
smcginnismriedem: Just wasn't sure if there was someting we were missing.18:39
mriedemred hat probably doesn't have a problem with that part, i'm assuming OSP provides that18:39
smcginnisGood question. eharney, any idea if this all works on RH?18:39
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smcginniseharney: If you weren't following along at home. :)18:40
hemnaheh, I'll have to find out if it works on Helion.18:40
smcginnisI guess if it doesn't work on anyone's distro, there's probably not much to worry about for now. :)18:40
smcginniseharney: :)18:40
eharneyi'm not really sure if that's something we support18:41
hemnaI'm more concerned w/ the direction that danpb wants to move Nova.  it seems like a major step backwards IMHO18:41
smcginnisThe spec doesn't call out which version of qemu.18:41
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openstackgerritMerged openstack/cinder: fast8: Skip git rm'd files
scottdasmcginnis: Sorry, I was not involved when that spec merged ...18:45
smcginnisscottda: Weak excuse.18:45
scottdaI don't think there was a Nova liason at the time :)18:45
smcginnisHah! :)18:45
eharneyseems like it's not totally uncharted territory, qemu has used rbd and gluster that way for a long time18:46
smcginnisscottda: Yeah, didn't realize at first it was so long ago.18:46
smcginniseharney: Oh! Didn't realize there was built in support for those.18:46
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scottdaI agree with hemna . This particular feature is probably not being used much, but it's not a good direction to go.18:46
hemnaeharney, yah they have, but moving all transports into qemu seems like a major mistake IMHO18:47
smcginniseharney: Don't suppose you have any idea the advantage of qemu handling that vs the host OS?18:47
eharneyfor rbd/gluster it's usually about performance scalability, not really sure in the case of iSCSI18:48
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eharneyand, well, for rbd it's just the easiest way to implement it anyway18:48
smcginniseharney: It's more performant having qemu handle it?18:48
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eharneysmcginnis: that's what i hear, but i have no idea how that translates to this case18:49
hemnasounds like a potential for a bottleneck to me18:49
smcginniseharney: Interesting data point at least. Thanks!18:49
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scottdaI think I'd rather debug iscsi attach errors at the OS level than at the libvirt level.18:53
hemnascottda, +1000018:53
mriedemdanpb did mention something about being able to tweak performance with qemu native stuff,18:53
mriedemin a spec asking for rbd encryption support in nova18:53
mriedemlet me dig that up18:53
mriedembasically dan is -1 on that since it uses dm-crypt (more dm-crypt usage)18:54
mriedemand he wants to wait for native qemu encryption support18:54
mriedemwhich is like N at the earliest18:54
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mriedemif you guys have comments on that spec too, please provide input18:54
hemnaman, I can only see the problems we'll have with this18:56
hemnacinder uses 1 mechanism to do attaches/encryption and nova uses another18:56
openstackgerritMerged openstack/os-brick: Parse FCoE sysfs device paths
smcginnisWhat could go wrong?18:56
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hemnaso FWIW, I put a -2 on the os-brick encryptors patch for the time being.18:58
hemnauntil we hash this out18:58
hemnadanpb already -1'd it for the same reasons he posted in the ML.18:58
hemnamore discussion happening there.19:00
hemnawe need to has this out.19:00
hemnasounds like, danpb thinks cinder shouldn't ever do encryption.19:01
hemnawhich precludes doing copy volume <--> image operations.19:01
hemnaor backup19:01
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scottdaOr Cinder attach without Nova19:02
hemnaand that19:02
smcginnisHmm, securing against cinder being able to do any encryption/decryption.19:03
smcginnisCuz we'd be the vulnerable point?19:03
hemnaevidently, Cinder will compromise the storage, according to him.19:03
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* hemna has a sad19:03
smcginnisIf Cinder is compromised, I think there are much bigger issues. But that might just be me.19:04
hemnasmcginnis, +119:04
hemnathis isn't what I had planned for my Friday19:04
smcginnisFWIW, I think your last comment on there is exactly the point.19:05
hemnaDuncanT, ping19:06
hemnaDuncanT, replied to the ML post, but wasn't specific to the direction of attaches, but more direct to the encryptors code.19:06
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hemnawe need to craft a response about the direction and get our heads aligned with Nova on this.19:06
hemnaas this is a vast departure from the current situation and has major issues IMHO.19:07
scottdaDuncan likely won't be back to work until Sunday, FYI. It's his weekend.19:07
hemnascottda, ah yah good poing19:08
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scottdaso, hemna is right about  getting our heads aligned and crafting a response, but the logistics are tricky....19:10
scottdaWith some people on weekend, some folks living it up in Paris, and Thanksgiving Holiday week coming up...19:11
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hemnaI'll be around Monday, Tuesday.19:11
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scottdaIt seems that some things are clear: Cinder is not going to remove any existing encryption/decrypt support, as it is necessary.19:12
smcginnisHah! I'll be around Tuesday for sure.19:12
smcginnisscottda: +119:12
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hemnayah, that assertion about Cinder not doing encryption is unrealistic.19:13
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scottdaSo is the real question about what can be moved into Brick, and whether it should?19:13
smcginnisI can see the desire for it. In general it probably is a good thing to limit decrypt points as much as possible.19:13
smcginnisBut that's just not the reality.19:13
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hemnathe only way to do it, is to completely change how we do the copy volume <--> image operations entirely19:14
hemnaand spin up worker VMs19:14
hemnathat then fire up a cinder-data service inside the vm19:14
hemnaand attach the volume to the qemu host.19:14
hemnathat seems like a nightmare to me19:14
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hemnagood luck supporting FC19:14
scottdaThere's still work in-flight to have the ability to attach/detach without nova19:14
smcginnisOi. :(19:15
smcginnisscottda: Right, this would completely preclude the ability to do non-Nova stuff with encryption.19:15
hemnaI haven't looked at the encryptor code in the brick patch yet.19:15
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hemnait may be fine, or it may be borked.19:16
smcginnisWell, wife finally waking up. Better stop working now. :)19:16
hemnabut the idea in general seems ok.19:16
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scottdasmcginnis: Have a good one.19:17
scottdahemna: I need to go eat breakfast. Let's put our heads together later. Maybe others will catch up on the subject in scroll back and weigh in.19:18
tbarronsmcginnis: enjoy the weekend!19:18
hemnascottda, ok sounds good19:18
tbarronscottda, hemna: the idea that the storage service (cinder, not various backends) is more likely to be compromised than nova seems to me a bit weird.19:20
tbarronI get an argument that the attack surface should be made as small as possible though  - but not smaller than possible :-) and the copy to/from image counter seems pretty decisive.19:21
hemnatbarron, yah, I can't see how a c-vol host is more vulnerable than a n-cpu host19:21
tbarronan n-cpu host with guests whom from a security standpoint should be assumed to be hostile.19:22
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hemnaand cinder only has that volume for a 'short' period of time19:22
hemnait's transient19:22
tbarronnow if somene wanted to implement a general data-transfer service and limit the use of the keys to that service ...19:23
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hemnabut that's another point of access19:25
hemnawhich is danpb's argument that it should only ever be n-cpu19:25
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openstackgerritGerald McBrearty proposed openstack/cinder: add force flag on first vdisk host mapping call
tbarronI wonder if when he says "a core aim .. is to provide against a compromised storage service" he's conflating cinder code and storage backend service?19:28
scottdac-vol is only accessible via admin API, and any sane deployment has it on a separate control plane network19:29
scottdaAnd storage backend is even further isolated.19:29
hemnatbarron, yah I'm not exactly sure what he's implying19:29
hemnascottda, c-vol is also accessible to an operator19:29
tbarroncloud administrators might not trust backend storage administrators, but I don't see cloud nova admins not trusting cloud storage admins, as it were19:29
scottdatrue. but not to an end user19:29
hemnascottda, correct.19:29
scottdaThe operator has access to the nova nodes as well.19:30
hemnait's a good goal to have19:30
hemnabut, in this case unrealistic.19:30
tbarronthe operator can get at the guest's memory if they really want to.19:30
openstackgerritAlex O'Rourke proposed openstack/cinder: LeftHand: Remove self.db assignment
scottdaIn our public cloud, Cinder team must have access to the Nova nodes. There's no way to debug and deal with incidents without access.19:31
scottdaSeems like this is a problem that is better solved with smart key management.19:31
tbarronscottda: there you go, messing up a good argument with real world facts.19:31
scottdaI respect security experts. But they are kinda like lawyers...find a possible flaw and shut things down just in case. Not realistic.19:32
tbarronyeah, I've had to debug/support customers who are inside an airgap.  Not fun telling them what to grep for and read back over the phone.19:34
* tbarron leaves for a meeting19:34
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hemnaOpenStack has key management service already19:37
hemnaok I posted a quick reply on the ML19:37
hemnawrt to the encryptors stuffs.19:37
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tbarronhemna: well said.19:42
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openstackgerritScott DAngelo proposed openstack/python-cinderclient: api-microversion support for python-cinderclient
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nikeshmkmartin: thanks, actually Rekha was facing issue21:08
nikeshmRekha: are you online21:09
nikeshmRekha: you can see chat history for solution of your problem21:10
nikeshmsmcginnis : whats up21:11
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Swansonnikeshm, I'm pretty sure smcginnis is out on the town with his wife for their anniversary.21:13
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nikeshmSwanson: nice, but i heard he is in Paris, so better be careful due to recent activities in Paris21:15
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openstackgerritGerald McBrearty proposed openstack/cinder: add config option to control flash copy rate
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openstackgerritxing-yang proposed openstack/cinder: Add a GateDriver
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* hemna waits for someone to file a bug against the GateDriver not supporting data consistency.......21:48
xyang1hemna: I know it is going to come:)21:49
hemnahehe yah21:49
hemnarename it to the DieDieDieDriver21:49
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xyang1hemna: :)21:50
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