[Linux-HA] HA of virtual machiens

[Michael Schwartzkopff]

Am Freitag, 1. Februar 2008 13:02 schrieb Dejan Muhamedagic:
> Hi,
>
> On Fri, Feb 01, 2008 at 11:44:16AM +0100, Michael Schwartzkopff wrote:
> > Hi,
> >
> > we want to offer services on 4 servers. These services should be high
> > available. All services will have very low usage.
(...)
> Options 2 or 3. Note that you'll probably have higher maintenance
> costs with option 3 as well as more complex configuration. And
> lower hardware cost. It's really a matter of preference. I'd
> probably go with option 2) and reduce the number of nodes if
> possible.

HA! Even better solution:
8 virtual machines on 2 physical servers form one cluster. heartbeat in that 
cluster can monitor application resources. If one physical machine dies, no 
problem. If an application causes trouble: move it onto a machine on the 
other physical machine. Constraints will be complex, but with the technique 
from "floating peers" from the DRBD HOWTO it should be possible.

-- 
Dr. Michael Schwartzkopff
MultiNET Services GmbH
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