** Package changed: linux (Ubuntu) => udev (Ubuntu)
** Changed in: udev (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/1647067
Title:
Dangling UDEV links after removing FC LUNs
Status in udev package in Ubuntu:
New
Bug description:
We're using Q-Logic QLE2562 Fibre Channel adapters (qla2xxx driver)
against a HPE 3PAR 7400c storage array in an OpenStack environment.
The OpenStack 3PAR driver manages volume attachments from the array to
the servers. There is 4 path multipath to every volume.
As the LUNs are removed, sometimes udev does not remove all links,
particularly in /run/udev/links and /dev/disk/by-path. The symptoms
are multiple records in one by-path directory under /run/udev/links,
broken links to no longer attached luns in dev/disk/by-path and links
between wrong LUNs and scsi devices there.
OpenStack relies on these links. When another volume is attached using
a LUN that has these leftover links and it happens that it is the
first of the 4 paths, OpenStack incorrectly identifies the volume and
attaches the same volume to multiple instances, leading to data loss.
What could be causing this behavior?
Ubuntu version 14.04
Linux version Ubuntu 4.4.0-47.68~14.04.1-generic 4.4.24
udev 204-5ubuntu20.19
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