Re: [Xen-users] How can I do HA among dom0s?

[John Madden <jmadden@xxxxxxxxxxx>]

> I need some sort of daemon that detects if the other host is down and 
> let me execute a custom script to live migrate machines. Heartbeat, 
> Keepalive or ucarp, as far as I know, don't do this. They first detect 
> when the host is down and after they activate a virtual IP address. If 
> the service that they make HA is stateless, let's say DNS, you don't 
> need to do any syncing between disk, if it is a Database you have to do 
> DRBD.

Heartbeat *does* allow scripting -- in fact, its entire HA
startup/shutdown is shell script-based.  You can do about anything you
want with heartbeat and a little creativity. 

DRDB is not sufficient for database mirroring.  DRDB is not, in and of
itself, a HA/clustering solution; all it does is disk mirroring.

In the event of a dom0 failure, you can assume your domU's have failed.
STONITH the downed dom0, set up the storage on the backup dom0 machine,
start up the domU's.

John





-- 
John Madden
Sr. UNIX Systems Engineer
Ivy Tech Community College of Indiana
jmadden@xxxxxxxxxxx


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