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Re: [Xen-users] Xen, LVM, DRBD, Linux-HA

From: "andreas zingel" <tytios@xxxxxxxxxxxxxx>

Date: Tue, 22 Apr 2008 11:38:01 +0200

Delivery-date: Tue, 22 Apr 2008 02:38:40 -0700

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List-id: Xen user discussion <xen-users.lists.xensource.com>

http://www.pro-linux.de/work/virtual-ha/virtual-ha5.html

2008/4/22, Rainer Sokoll <rainer@xxxxxxxxxx>:

Hi,

I want to put it all together.
So far, I have a running machine with multiple domUs, and I am very
excited. But now I want to go a step ahead:
I have two identical machines with a big amount of RAM and disk space.
My goal is to hve all the domUs almost redundant - and want to ask you
for your advice.
The plan is to have every VM in its own logical volume and have DRBD
replicate this volume to the other machine. Assumed Linux with Linux-HA
runs in a VM, here comes my question:
If the complete Linux VM runs in its own logical volume, Linux-HA cannot
work, since the configuration must not be the same on both sides. One
solution would be to have a minor file based backend that holds /etc/,
/proc/, /var/, /boot/ (and maybe more?). Or maybe there is a more
sophisticated solution?
How would you start?

Thanks,
Rainer

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