[CentOS-virt] How to pass messages from dom0 to domU??

Thu Jul 23 08:19:11 UTC 2009
R P Herrold <herrold at centos.org>

On Wed, 22 Jul 2009, Christopher G. Stach II wrote:

> ----- "David Knierim" <dknierim at gmail.com> wrote:
>> I am adding code to my installation on dom0 (running CentOS 
>> 5.3) to monitor for hardware faults. If there is an issue, 
>> I want to propagate the status to all of the domUs (running 
>> CentOS 4.x or CentOS 5) running on the host.

> 2. Share a private virtual network segment with every 
> connected guest domain.  Write a packet in dom0 and read in 
> domU.

The addition of a new private network segment seems like 
overkill and needless additional fragility and complexity -- 
if one to one, use a remote syslog setup (viz., over UDP); if 
one to many (domU), use a multicast sender and listeners.

Run either on the existing network seqment shared by the domUs 
and dom0 already.

-- Russ herrold