Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
I think you can't use DRBD device directly with multipath, but if you
export it via iSCSI and then import it back it is possible.
Another option is LVM over DRBD -> device in /dev/mapper
Another one is just a symlink in /dev/mapper from udev rule
On Tue, 10 Apr 2012 09:41:13 -0400, "Dan Barker" <dbarker at visioncomm.net>
wrote:
> How do I get multipathd to notice my drbd block devices?
>
> RHEL5 (Oracle VM 3.0.3.127, actually), 2.6.32.21-45xen.
> Drbd 8.4.1:
> multipath-tools says v0.4.9. I can't seem to find the multipath version.
>
> resource r0 {
> on OVMPam {
> volume 0 {
> device /dev/drbd0 minor 0;
> disk /dev/sdb;
> meta-disk internal;
> }
> address ipv4 172.30.0.167:7789;
> }
> on DRPam {
> volume 0 {
> device /dev/drbd0 minor 0;
> disk /dev/sdb;
> meta-disk internal;
> }
> address ipv4 172.30.0.170:7789;
> }
> startup {
> become-primary-on OVMPam;
> }
> }
>
> As-distributed global.
>
> All multipath commands reply "Apr 09 08:10:50 | DM multipath kernel
driver
> not loaded", as if no devices were detected at boot time.
>
> I have drbd start before multipathd.
>
> Relax, I have no plans to multipath to this device, Oracle VM looks only
in
> /dev/mapper for repository candidates.
>
> New 10 April: Ping! Anyone have any ideas? Even a different forum in
which
> to ask?
>
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