[DRBD-user] DRBD + LVM2 Setup on RHEL5.1

[Chris Raver]

I suspected the entry was probably not correct.  This is the first time I've tried setting this up and was simply following the documentation at http://www.drbd.org/users-guide/s-lvm-lv-as-drbd.html.  Thanks for the help.  I've made the change and have promoted one node to Primary and will try to run the pvcreate command again when it is done.

Thanks
Chris
________________________________________
From: drbd-user-bounces at lists.linbit.com [drbd-user-bounces at lists.linbit.com] On Behalf Of haaseg [haaseg at onefreevoice.com]
Sent: Thursday, March 20, 2008 8:09 PM
To: DRBD
Subject: Re: [DRBD-user] DRBD + LVM2 Setup on RHEL5.1

Judging by your pvcreate statement, it appears that you are trying to
run lvm2 on top of a drbd device. In that case, I believe /dev/drbd0
needs to be primary before you can run pvcreate. You can put /dev/drbd0
in primary because drbd is not starting correctly.

What device is /dev/drbd/r0? Most block devices in RHEL are going to be
/dev/sd[a-d] (SCSI or SATA) or /dev/hd[a-d] (IDE).

Chris Raver wrote:
>
> I’m having a difficult time setting up DRBD and LVM2 on Redhat
> Enterprise Linux 5.1. I’ve installed DRBD82 and KMOD-DRBD82 via the
> CentOS 5.1 repo using yum and I’ve also compiled and installed the
> module from source using the correct kernel source, I get the same
> result either way. I created my drbd.conf file below but starting the
> service fails and so does running pvcreate to create my physical
> volume. I’ve been working on this for a couple days with no success.
> Can someone here point me in the right direction?
>
> Starting drbd:
>
> /etc/init.d/drbd start
>
> Starting DRBD resources: [ d(r0) Can not open device '/dev/drbd/r0':
> No such file or directory
>
> [r0] cmd /sbin/drbdsetup /dev/drbd0 disk /dev/drbd/r0 /dev/drbd/r0
> internal --set-defaults --create-device --on-io-error=detach failed -
> continuing!
>
> n(r0) ].
>
> [root at qa1r2cls drbd-8.2.5]#
>
> drbd.conf file:
>
> resource r0 {
>
> protocol C;
>
> startup {
>
> degr-wfc-timeout 90;
>
> }
>
> disk {
>
> on-io-error detach;
>
> }
>
> on qa1r2cls {
>
> device /dev/drbd0;
>
> disk /dev/drbd/r0;
>
> meta-disk internal;
>
> address 192.168.50.202:7789;
>
> }
>
> on qa1r3cls {
>
> device /dev/drbd0;
>
> disk /dev/drbd/r0;
>
> meta-disk internal;
>
> address 192.168.50.203:7789;
>
> }
>
> }
>
> pvcreate error:
>
> [root at qa1r2cls drbd-8.2.5]# pvcreate -d -v -ff /dev/drbd0
>
> Wiping cache of LVM-capable devices
>
> Wiping internal VG cache
>
> Device /dev/drbd0 not found (or ignored by filtering).
>
> lvm.conf filter:
>
> filter = [ "r|.*|", "a|/dev/drbd[0-9]$|" ]
>
> * *
>
> * *
>
> *Thanks*
>
> * *
>
> *cid:image001.jpg at 01C7EA28.A81AF980***
>
> *Chris Raver*
>
> *Senior Quality Assurance Engineer*
>
> Alpha Bay Corporation
>
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>
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>
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