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** Also affects: nova/icehouse
Importance: Undecided
Status: New
** Changed in: nova/icehouse
Status: New => Fix Committed
** Changed in: nova/icehouse
Milestone: None => 2014.1.3
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https://bugs.launchpad.net/bugs/1327497
Title:
live-migration fails when FC multipath is used
Status in OpenStack Compute (Nova):
Fix Released
Status in OpenStack Compute (nova) icehouse series:
Fix Committed
Bug description:
I tried live-migration against VM with multipath access to FC bootable volume and FC data volume.
After checking the code, I found the reason is that
1. /dev/dm-<NUM> is used, which is subject to change in the destination Compute Node since it is not unique across nodes
2. multipath_id in connnection_info is not maintained properly and may be lost during connection refreshing
The fix would be
1. Like iSCSI multipath, use /dev/mapper/<multipath_id> instead of /dev/dm-<NUM>
2. Since multipath_id is unique for a volume no matter where it is attached, add logic to preserve this information.
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