[Bug 803554] Re: upgrading to multipath 0.4.9 presents incompatible config file changes
Peter Petrakis
peter.petrakis at canonical.com
Mon Jul 9 14:01:48 UTC 2012
This has been resolved by updating the documentation in the serverguide.
https://help.ubuntu.com/12.04/serverguide/device-mapper-
multipathing.html#multipath-new-and-changed-features
** Changed in: multipath-tools (Ubuntu)
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/803554
Title:
upgrading to multipath 0.4.9 presents incompatible config file changes
Status in “multipath-tools” package in Ubuntu:
Fix Released
Bug description:
The priority checkers have been converted from individual binaries
that callout to dynamically loaded libraries (dlopen). As a result,
should a circa 0.4.8 config file remain in place, the priority checker
becomes undefined, as that standalone path checker no longer exists.
This will effect users who upgrade to Oneiric and users who upgrade
from lucid to the next LTS.
One example of the format change is,
0.4.8:
prio_callout "/sbin/mpath_prio_alua /dev/%n"
0.4.9:
prio alua
There may be other config file changes, more exploration is needed.
Here's what the preconfigured, 0.4.9 priority checkers look like.
# echo 'show config' | multipathd -k | grep 'prio '| sort -u
prio alua
prio const
prio emc
prio hds
prio hp_sw
prio netapp
prio rdac
In 0.4.8:
# echo 'show config' | multipathd -k | grep 'prio_callout'| sort -u
prio_callout /sbin/mpath_prio_alua /dev/%n
prio_callout /sbin/mpath_prio_alua %n
prio_callout /sbin/mpath_prio_emc /dev/%n
prio_callout /sbin/mpath_prio_hds_modular /dev/%n
prio_callout /sbin/mpath_prio_hp_sw /dev/%n
prio_callout /sbin/mpath_prio_netapp /dev/%n
prio_callout /sbin/mpath_prio_rdac /dev/%n
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