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[Linux-cluster] LVM over a gnbd exported device



Hello.
I'm currently seting up a three node cluster.
I want to have a shared logical partition between the three nodes i.e that the device
/dev/vg1/lv1 appears on the three nodes.


There is what I tryed
after initialing the cluster:

(ccsd cman_tool join fence_tool join clvmd vgchange -aly worked well)

export /dev/hdb from the node debian to buba and gump.
debian has /dev/hdb
buba has /dev/gnbd/dd
gump has /dev/gnbd/dd

From gump, I tried to create a logical volume from the shared device, everything goes well until lvcreate:

[root gump gnbd]#pvcreate /dev/gnbd/dd
 Physical volume "/dev/gnbd/dd" successfully created
[root gump gnbd]# vgcreate vg1 /dev/gnbd/dd
 Volume group "vg1" successfully created
[root gump gnbd]# lvcreate -l 1500 -n lv1 vg1
 Error locking on node gump: Internal lvm error, check syslog
 Error locking on node buba: Internal lvm error, check syslog

The syslog from buba end gump were the same:

Feb 18 17:27:10 gump lvm[6634]: Volume group for uuid not found: 6fz5zUSDvMbKnau8HdhjawXiduq1wIYoRRj2kR4Mf8rM9YE1bisYu671jD26sijR

For the debian node everything went well, because it had /dev/vg1/lv1 and because lvscan gave:

17:27 root debian ~# lvscan
 ACTIVE            '/dev/vg1/lv1' [5,86 GB] inherit


On the two other nodes I had [root buba dev]# lvscan inactive '/dev/vg1/lv1' [5,86 GB] inherit.

It seems that all worked well, except the activation of the logical volume for buba and gump because they didn't find a volume groupe for the uuid of the shared physical device.......

Has someone any idea about fixing it?

Thanks in advance.

There is my cluster.conf:

<?xml version="1.0"?>
<cluster name="cluster1" config_version="1">

<clusternodes>
<clusternode name="buba" votes="1">
<fence>
<method name="single">
<device name="human" ipaddr="200.0.0.10"/>
</method>
</fence>
</clusternode>
<clusternode name="gump" votes="1">
<fence>
<method name="single">
<device name="human" ipaddr="200.0.0.97"/>
</method>
</fence>
</clusternode>


   <clusternode name="debian" votes="1">
     <fence>
       <method name="single">
         <device name="human" ipaddr="200.0.0.102"/>
       </method>
     </fence>
   </clusternode>
 </clusternodes>

 <fence_devices>
   <device name="human" agent="fence_manual"/>
 </fence_devices>

</cluster>





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