[DRBD-user] drbd+lvm no bueno

[Eric Robinson]

> -----Original Message-----
> From: drbd-user-bounces at lists.linbit.com [mailto:drbd-user-
> bounces at lists.linbit.com] On Behalf Of Robert Altnoeder
> Sent: Thursday, July 26, 2018 5:12 AM
> To: drbd-user at lists.linbit.com
> Subject: Re: [DRBD-user] drbd+lvm no bueno
> 
> On 07/26/2018 08:50 AM, Eric Robinson wrote:
> >
> >
> > Failed Actions:
> >
> > * p_lv_on_drbd1_start_0 on ha16b 'not running' (7): call=68,
> > status=complete, exitreason='LVM: vg_on_drbd1 did not activate
> > correctly',
> >
> >     last-rc-change='Wed Jul 25 22:36:37 2018', queued=0ms, exec=401ms
> >
> >
> >
> > The storage stack is:
> >
> >
> >
> > md4 -> drbd -> lvm -> filesystem
> >
> 
> This is most probably an LVM configuration error. Any LVM volume group on
> top of DRBD must be deactivated/stopped whenever DRBD is Secondary and
> must be started whenever DRBD is Primary, and LVM must be prevented from
> finding and using the storage device that DRBD uses as its backend, which it
> would normally do, because it can see the LVM physical volume signature not
> only on the DRBD device, but also on the backing device that DRBD uses.
> 

Would there really be a PV signature on the backing device? I didn't turn md4 into a PV (did not run pvcreate /dev/md4), but I did turn the drbd disk into one (pvcreate /dev/drbd1). 

-Eric