[dm-devel] Issue with setting uid/gid/mode in multipath.conf

[Mark Goodwin]

Chandra Seetharaman wrote:
> Hi Benjamin,
> 
> I have a small issue with setting the uid/gid/mode with multipath tools.
> 
> I have the following in my /etc/mulitpath.conf file
> ------------------
> multipaths {
>         multipath {
>                 wwid 3600a0b800011a1ee00003f834a3f7a65
>                 alias dev4
>                 mode    0666
>                 uid     1001
>                 gid     1001
>         }
> }
> -------------------
> 
> After adding this, I do a "multipath -F" following by "multipath" (or
> multipath -F followed by /etc/init.d/multipathd restart), I see the
> attributes are set properly on the device.
> 
> I reboot the system, the device is created (under /dev/mapper) but
> attributes are not set as defined in the multipath.conf file.
> 
> Have you seen this issue ? 
> 
> I am using RHEL 5.3 ga version (kernel and tools).
> 

yes we've recently also seen this issue and can reproduce it without
any need for a reboot, see https://bugzilla.redhat.com/518575

It seems to be a racy interaction of some kind between udevd and multipathd.

Cheers
-- Mark