Hello Jeegn, or anyone else affected, Accepted nova into trusty-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/nova/1:2014.1.5-0ubuntu1.5 in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance! ** Changed in: nova (Ubuntu) Status: New => Fix Released ** Changed in: nova (Ubuntu Trusty) Status: New => Fix Committed ** Tags added: verification-needed -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1357368 Title: Source side post Live Migration Logic cannot disconnect multipath iSCSI devices cleanly Status in OpenStack Compute (nova): Fix Released Status in OpenStack Compute (nova) juno series: Fix Released Status in nova package in Ubuntu: Fix Released Status in nova source package in Trusty: Fix Committed Bug description: When a volume is attached to a VM in the source compute node through multipath, the related files in /dev/disk/by-path/ are like this stack@ubuntu-server12:~/devstack$ ls /dev/disk/by-path/*24 /dev/disk/by-path/ip-192.168.3.50:3260-iscsi-iqn.1992-04.com.emc:cx.fnm00124500890.a5-lun-24 /dev/disk/by-path/ip-192.168.4.51:3260-iscsi-iqn.1992-04.com.emc:cx.fnm00124500890.b4-lun-24 The information on its corresponding multipath device is like this stack@ubuntu-server12:~/devstack$ sudo multipath -l 3600601602ba03400921130967724e411 3600601602ba03400921130967724e411 dm-3 DGC,VRAID size=1.0G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw |-+- policy='round-robin 0' prio=-1 status=active | `- 19:0:0:24 sdl 8:176 active undef running `-+- policy='round-robin 0' prio=-1 status=enabled `- 18:0:0:24 sdj 8:144 active undef running But when the VM is migrated to the destination, the related information is like the following example since we CANNOT guarantee that all nodes are able to access the same iSCSI portals and the same target LUN number. And the information is used to overwrite connection_info in the DB before the post live migration logic is executed. stack@ubuntu-server13:~/devstack$ ls /dev/disk/by-path/*24 /dev/disk/by-path/ip-192.168.3.51:3260-iscsi-iqn.1992-04.com.emc:cx.fnm00124500890.b5-lun-100 /dev/disk/by-path/ip-192.168.4.51:3260-iscsi-iqn.1992-04.com.emc:cx.fnm00124500890.b4-lun-100 stack@ubuntu-server13:~/devstack$ sudo multipath -l 3600601602ba03400921130967724e411 3600601602ba03400921130967724e411 dm-3 DGC,VRAID size=1.0G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw |-+- policy='round-robin 0' prio=-1 status=active | `- 19:0:0:100 sdf 8:176 active undef running `-+- policy='round-robin 0' prio=-1 status=enabled `- 18:0:0:100 sdg 8:144 active undef running As a result, if post live migration in source side uses <IP>, <IQN> and <TARGET LUN Number> to find the devices to clean up, it may use 192.168.3.51, iqn.1992-04.com.emc:cx.fnm00124500890.a5 and 100. However, the correct one should be 192.168.3.50, iqn.1992-04.com.emc:cx.fnm00124500890.a5 and 24. Similar philosophy in (https://bugs.launchpad.net/nova/+bug/1327497) can be used to fix it: Leverage the unchanged multipath_id to find correct devices to delete. To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1357368/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
