[DRBD-user] DRBD on XenServer

Dan Barker dbarker at visioncomm.net
Sun Jul 31 13:49:48 CEST 2011

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

You will only "see" the node resources on the primary node.

On the master node, stop all processes using the drbd resource (I'll call it
r0) and "drbdadm secondary r0".
On the slave node, "drbdadm primary r0". Now the resource is available on
the slave node.

In practice, you have to trust a status of "Up-To-Date" in most situations.
Accessing the "slave" node while secondary would most likely corrupt it
(unless it's cluster aware - a different issue all together). drbd prevents
that (accessing a secondary resource).



-----Original Message-----
From: drbd-user-bounces at lists.linbit.com
[mailto:drbd-user-bounces at lists.linbit.com] On Behalf Of waynecsh
Sent: Thursday, July 28, 2011 12:08 AM
To: drbd-user at lists.linbit.com
Subject: [DRBD-user] DRBD on XenServer


I'm trying to setup DRBD on citrix Free Xenserver in master/slave mode.

I've managed to go to the stage where 'cat /proc/drbd' shows the two nodes
are synchronised in primary/secondary mode, and defined a local storage on
the primary node using the "xe sr-create".

However, on the slave xenserver, I cannot see the new storage. Even 'lvs' &
'vgs' command do not show anything.

Can anyone advice me on how to confirm that the newly created storage is
being replicated to the slave node? Do I need to define the storage again on
the slave node?

Thank you.

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