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

[António Meireles <sbin@xxxxxxxxx>]

I'm being using a setup similar to the one described here - 
http://www.certifried.com/?q=node/4 - with great success for months.
All the Best,

António






Miguel Araujo wrote:
> Hello all,
>
> I'm making some tests using XEN 3.1. Now I have a machine exporting 
> iSCSI blocks (could be considered a SAN) devices to several dom0s that 
> run different machines. After making some live migrations I would like 
> to automate the process for being able to offer High Availability. What 
> I want to do is find a way to heartbeat machines in a ring structure, so 
> that if a machine crashes the one that is "pinging" will be able to cope 
> with its work temporarily till replacement. I've been reading for a 
> while about HA on linux machines, but I don't find a solution for this. 
> Let me explain it easily:
> 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.
> The issue here is that the storing is distributed, so I don't have to 
> sync block devices. Is there a way to configure one of these services to 
> be able to let me execute what I want? If there is I haven't been able 
> to find it.
> Does anyone know what open software solution could be used to do HA this 
> way?
> Thank you very much in advanced for your time and effort, Regards
>
>     Miguel Araujo

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