[ClusterLabs] ocf:heartbeat:LVM or /etc/lvm/lvm.conf settings question

[Darren Kinley]

The default lvm.conf's filter includes /dev/drbdX

    # By default we accept every block device except udev names, floppy and cdrom drives:
    filter = [ "r|/dev/.*/by-path/.*|", "r|/dev/.*/by-id/.*|", "r|/dev/fd.*|", "r|/dev/cdrom|", "a/.*/" ] 

-----Original Message-----
From: emmanuel segura [mailto:emi2fast at gmail.com] 
Sent: Wednesday, August 10, 2016 2:33 PM
To: Cluster Labs - All topics related to open-source clustering welcomed <users at clusterlabs.org>
Subject: Re: [ClusterLabs] ocf:heartbeat:LVM or /etc/lvm/lvm.conf settings question

your lvm filter include the drbd devices /dev/drbdX ?

2016-08-10 21:38 GMT+02:00 Darren Kinley <dkinley at mdacorporation.com>:
> Hi,
>
> I have an LVM logical volume and used DRBD to replicate it to another 
> server.
> The /dev/drbd0 has PV/VG/LVs which are mostly working.
> I have colocation and order constraints that bring up a VIP, promote 
> DRBD and start LVM plus file systems.
>
> The problem arises when I take the active node offline.
> At that point the VIP and DRBD master move but the PV/VG are not 
> scanned/activated, the file systems are not mounted and “crm status” 
> reports an error for the ocf:heartbeat:LVM resource
>
> “Volume group [replicated] does not exist or contains an error!
> Using volume group(s) on command line.”
>
> At this point the /dev/drbd0 physical volume is not known to the 
> server and the fix requires
>
> root# pvscan –cache /dev/drbd0
> root# crm resource cleanup grp-ars-lvm-fs
>
> Is there an ocf:heartbeat:LVM setting or /etc/lvm/lvm.conf settings to 
> force the PV/VGs to come online?
> It is not clear whether the RA script “exclusive” or “tag” settings 
> are needed or there is a corresponding lvm.conf setting.
>
> Is l”vm.conf write_cache_state = 0” recommended by the DRBD User Guide 
> correct?
>
> Thanks,
> Darren
>
>
>
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