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xen-users
Re: [Xen-users] Do I need a dummy?
Just to say I managed to get this scenario working very satisfactorily
using the instructions here:
http://docwhat.gerf.org/2008/08/xen-networking/
I don't know what made that howto work for me when others didn't and
like the author I had tried to fathom it all out from books and other
websites, but for some reason his explanation just clicked. And yes,
I have used a dummy0 adaptor even if I didn't have to.
I had a brief problem (I hope) after getting it all working in that I
couldn't seem to connect to my web VM - one of the public ones - from
my desktop in the UK but could using lynx on my other physical server
in the same datacentre. But I don't think that can be anything to do
with Xen networking.
Cheers,
Jock
On 10 Sep 2008, at 18:27, Jock Coats wrote:
Hi all,
I managed to get all my VMs (5 in total) up and running in bridged
mode with public IP addresses from my ISP. All are running Debian
Etch in a Dom) of Debian Etch with Xen 3.1 using the instructions
here: http://www.howtoforge.com/debian_etch_xen_3.1
But ideally I only want two of the DomUs on the public internet with
the other three only on an internal network and the two public ones
also connected to these so they can use databases and filestores on
the private side machines. Does that make sense? I'll try and
attach a PNG but if it doesn't come out in the email you can see it
here:
http://www.jockcoats.org.uk/jocks_xen_network_ambitions
<XenNetworkDiagram.png>
Assuming that diagram is roughly correct I assume I need two
bridges, one connected to Dom0's physical ethernet card with my two
public machines attached, and one without a network connection to
the outside world to which all the VMs are connected with private IP
addresses and so on. And that by adding routes I can get the zimbra
server to mount nfs drives say from one of the private machines or
other services I don't want exposed directly to the outside world.
Searching around I find a couple of blog postings or Wiki articles
saying that you don't need the "dummy0" interface any more. I'm not
sure I can see how to setup a bridge without either specifying one
or it defaulting to eth0. So, do I need a dummy? And if not how do
I set up the bridge without?
--
Jock Coats, JC Solutions - Connecting Communities
Warden's Flat 1e, J Block Morrell Hall, OXFORD, OX3 0FF
m: 07769 695767 skype:jock.coats?call http://jcsolutions.co.uk
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