* From: John Ruemker <jruemker redhat com>
* To: linux clustering <linux-cluster redhat com>
* Subject: Re: RE: Can't create LV in 2-node cluster
* Date: Wed, 08 Oct 2008 14:33:45 -0400
michael osullivan auckland ac nz wrote:
Hi Mark,
clvmd is running fine on both nodes. The result of "service clvmd
status" is
clvmd (pid xxxxx) is running...
active volumes: LogVol00 LogVol01
The result of vgscan is
Reading all physical volumes. This may take a while...
Found volume group "iscsi_raid_vg" using metadata type lvm2
Found volume group "VolGroup00" using metadata type lvm2
I just can't create a logical volume either from the command line or
using
system-config-lvm...
> Did you partition the device before adding a physical volume to it? If
so, did you run partprobe on both nodes? A common scenario is to
partition the device from node 1 and create a physical volume on it.
However the partition table is not automatically read on the second node
so it has no idea there is a partition there. When clvmd tells the
second node to activate a vg or lv on this unknown device, that node
responds that it can't lock on to the device since it has no idea what
it is. If you do end > up in this situation then usually the solution is
to do this on both nodes
>
> # rm /etc/lvm/cache/.cache
> # partprobe
> # clvmd -R
>
> Then from one node:
>
> # pvscan
> # vgscan
> # lvchange -ay vg/lv
>
>
> Try this and see if it helps.
>
> -John
Thanks for your help John,
I didn't partition the device before adding the physical volume, I just
used pvcreate. I tried you advice except for the last step as I have not
managed to create a logical volume to activate. The error changed a
little:
lvcreate -n iscsi_raid_lv -l 4882 iscsi_raid_vg gives
Error locking on node <other node>: Error backing up metadata, can't find
VG for group vg
Aborting. Failed to activate new LV to wipe the start of it.
Note that "group vg" used to be "group #global" before I tried your
solution. Any other ideas? This has got me really stumped. The commands I
used to create the physical volume and volume group were:
pvcreate /dev/iscsi_raid
vgcreate -cy iscsi_raid_vg /dev/iscsi_raid
But now lvcreate won't cooperate.
Thanks again for any help. Also thanks for your previous help too. Thanks,
Mike
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