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| openstackgerrit | XiaojueGuan proposed openstack/ceilometer-powervm master: Update links in README https://review.openstack.org/574658 | 08:53 |
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| chhagarw | efried,edmondsw: have a question on vSCSI pre_live_migration, | 13:35 |
| chhagarw | in the case of vscsi pre_live_migration we do volume discovery, after the volume discovery we do not update connection_info with the new udid value. | 13:36 |
| chhagarw | since the udid is now changed for the destination vios, so it needs to be updated for further detach operations. | 13:36 |
| edmondsw | why did the udid change? | 13:37 |
| edmondsw | I thought the udid came from the storage backend, and the volume is just being moved from one host to another rather than copied, so it would not change | 13:37 |
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| edmondsw | gman-tx shouldn't volume udid be the same on both source and destination hosts in a migration? Because that comes from the storage backend, right? | 13:40 |
| gman-tx | edmondsw on a linux vios this will be code page 83. On a traditional vios this is either code page 83 or the vios device unique id. The vios device unique id is partially based on code page 83. These will be the same on all VIOs. You can tell which one it is just by looking at the value. | 13:51 |
| edmondsw | gman-tx so udid should be the same on both host and destination? | 13:52 |
| gman-tx | what is the actual value that we seeing? | 13:52 |
| edmondsw | or it may change if one side of the migration was using traditional VIOS and the other side linux vios? | 13:53 |
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| gman-tx | they won't be the same unless its code page 83. | 13:54 |
| gman-tx | if we are seeing today that they are different then likely on the traditional vios udid is the vios device unique id | 13:55 |
| gman-tx | When are we seeing they are different? | 13:55 |
| edmondsw | chhagarw ? | 13:56 |
| gman-tx | can you post the value? | 13:56 |
| edmondsw | #startmeeting PowerVM Driver Meeting | 14:00 |
| openstack | Meeting started Tue Jun 12 14:00:20 2018 UTC and is due to finish in 60 minutes. The chair is edmondsw. Information about MeetBot at http://wiki.debian.org/MeetBot. | 14:00 |
| openstack | Useful Commands: #action #agreed #help #info #idea #link #topic #startvote. | 14:00 |
| *** openstack changes topic to " (Meeting topic: PowerVM Driver Meeting)" | 14:00 | |
| openstack | The meeting name has been set to 'powervm_driver_meeting' | 14:00 |
| edmondsw | ping efried esberglu gman-tx mdrabe mujahidali chhagarw | 14:00 |
| efried | ō/ | 14:01 |
| edmondsw | I'm on a call, I know gman-tx is in another meeting, mujahidali is on vacation... so I'm going to try to keep this short and sweet today | 14:01 |
| esberglu | o/ | 14:01 |
| edmondsw | rather than walk through the normal agenda, we'll just hit a few highlights and talk about anything someone wants to bring up | 14:02 |
| edmondsw | I tagged Rocky-2 for the *-powervm projects last week | 14:02 |
| edmondsw | we have a few commits proposed by tjakobs that we're trying to either a) make sure corresponding changes are released in NovaLink or b) get tested | 14:03 |
| edmondsw | (for OOT driver) | 14:03 |
| edmondsw | I think we've figured out the issues that mujahidali was hitting with porting the vSCSI CI work to stable branches, so that should merge quickly when he's back | 14:03 |
| edmondsw | I think that's it for me... | 14:04 |
| edmondsw | anyone want to add anything? | 14:04 |
| edmondsw | esberglu whenever you want to be taken off the ping list for this meeting, just update the agenda accordingly | 14:05 |
| esberglu | edmondsw: Nothing from me. I put some notes together for what's left for multinode CI, I might have a little time to poke some more before mujahid gets back | 14:05 |
| efried | bp reshape-provider-tree is getting close to spec approval. | 14:06 |
| efried | nrp-in-alloc-cands and consumer gen are getting merged relatively quickly now. | 14:06 |
| efried | that's all from me. | 14:06 |
| edmondsw | tx guys | 14:06 |
| edmondsw | sounds like that's it for today | 14:07 |
| edmondsw | #endmeeting | 14:07 |
| *** openstack changes topic to "This channel is for PowerVM-related development and discussion. For general OpenStack support, please use #openstack." | 14:07 | |
| openstack | Meeting ended Tue Jun 12 14:07:14 2018 UTC. Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4) | 14:07 |
| openstack | Minutes: http://eavesdrop.openstack.org/meetings/powervm_driver_meeting/2018/powervm_driver_meeting.2018-06-12-14.00.html | 14:07 |
| openstack | Minutes (text): http://eavesdrop.openstack.org/meetings/powervm_driver_meeting/2018/powervm_driver_meeting.2018-06-12-14.00.txt | 14:07 |
| openstack | Log: http://eavesdrop.openstack.org/meetings/powervm_driver_meeting/2018/powervm_driver_meeting.2018-06-12-14.00.log.html | 14:07 |
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| openstackgerrit | Taylor Jakobson proposed openstack/nova-powervm master: Add support to extend rbd cinder volumes https://review.openstack.org/569430 | 15:42 |
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| chhagarw | edmondsw: Just to update on the iSCSI powervm chnges there are couple of changes which I am working on | 16:04 |
| chhagarw | 1. Cleanup stale disks for iSCSI during discovery | 16:04 |
| chhagarw | 2. nova-powervm changes where volumes get left behind on detach after migration | 16:05 |
| edmondsw | chhagarw thanks | 16:13 |
| edmondsw | chhagarw please see the questions that were asked above | 16:13 |
| edmondsw | in relation to #2 | 16:14 |
| chhagarw | yeah we had a discussion in the scrum, so in sync | 16:14 |
| edmondsw | I wasn't in your scrum, though :) | 16:14 |
| gman-tx | can you fill everyone in here? | 16:17 |
| gman-tx | a summary that is | 16:18 |
| chhagarw | gman-tx: sure | 16:25 |
| chhagarw | During deploy the BDM connection_info is updated with 'target_UDID' during iSCSI volume discovery in nova-powervm | 16:27 |
| chhagarw | https://github.com/openstack/nova-powervm/blob/master/nova_powervm/virt/powervm/volume/iscsi.py#L298 | 16:28 |
| chhagarw | the above code stores that information, which is further saved in the BDM, this information is needed to identify the hdisk during detach. | 16:29 |
| chhagarw | During live_migration, since connection_info is refreshed for the destination host, this property is lost. | 16:30 |
| chhagarw | and we no longer have target_UDID property to do the detach after migration. | 16:30 |
| chhagarw | Since we do not update the BDM connection_info during pre_live_migration | 16:31 |
| chhagarw | That causes the detach failures after VM is migrated. | 16:32 |
| chhagarw | There are 2 possible ways to solve this | 16:32 |
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| chhagarw | 1. vSCSI way which I don't like much: In the case of vSCSI we re-discover the volume on the host again if the UDID is missing, So if you consider if the volume is migrated, than on every detach we re-discover the volume. | 16:34 |
| chhagarw | Where we are sure, that in the case of migration it will be always missing. | 16:34 |
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| chhagarw | 2. Another option is to update the BDM connection_info after pre_live_migration_at_destination, this is the place where we discover the volumes and obtain the UDID information, so update connection_info and save BDM as a part of pre_live_migration. | 16:36 |
| openstackgerrit | Merged openstack/ceilometer-powervm master: Update links in README https://review.openstack.org/574658 | 16:54 |
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