Re: [Xen-users] Topology question

[Adam Goryachev <mailinglists@xxxxxxxxxxxxxxxxxxxxxx>]

On 11/09/13 22:16, Manuel Knitza wrote:
> Hi,
>
> I tried to find what I am looking for for a while, but did not succeed so far.
>
> So maybe one could point me into the right direction, or give me a nice hint, 
> or
> even a solution...
>
> I've got a root server, which is my Xen Host (Debian Wheezy)
> and managed to install Xen 4.2, by modifying the apt-sources.
>
> I've got 5 public IPs available (say x.x.x.A to x.x.x.A) so far.
>
> I now have a Domain, let's say mydoma.in pointing to x.x.x.D (this is going 
> to be
> my coordinating guest)
>
> with two PVs - my name servers:
>
>       - ns1.mydoma.in pointing to  x.x.x.B and
>       - ns2.mydoma.in pointing to  x.x.x.C and
>
> whereas the domain itself:
>
> So far the network setup is as follows:
>
> on host:
> xenbr0 (ip x.x.x.A) via eth0 with all guests attached to it. (x.x.x.{B,C,D}).
> All guests have internet access, are pingable etc.
>
> Next thing is that I want to setup an own guest for every subdomain, e.g.
>
>       - oc.mydoma.in
>       - mail.mydoma.in
>       - www.mydoma.in
>       - vpn.mydoma.in
>       - etc.
>
> I want all the the subdomain DomUs as well as the domain DomU itself
> to be able to see each other, but only want to assign one single public IP
> to the "mydoma.in"-DomU.
> Depending on the Port my domain main DomU should route the requests
> to the corresponding sub domain domU.
>
> I also only have one physical NIC (eth0) on my server and only can add
> vif's (eth0:0, eth0:1...).
>
> A lot of examples I found is for XEN 3.0. I could not yet get everything up
> and running as desired.
>

Maybe I'm missing something, but I'd start with something like this:
1) I assume you currently add eth0 to a bridge called xenbr0, and each
domU's network interface is also bridged to xenbr0

2) Create a new bridge called xenbr1

3) Add a second network interface (on xenbr1) to the domU that has the
IP you want to split up depending on port (probably x.x.x.D) and
configure this interface with an internal IP 10.34.72.1

4) Setup a domU for oc.mydoma.in, with a single network interface on
xenbr1, and configure with an IP of 10.34.72.2

5) Now refer to standard linux networking on how to port forward http
from x.x.x.D to 10.34.72.2 (hint, use iptables command).

6) Repeat for each other IP/port/service/domU.


That is how I would do it in xen 4.1.x anyway. If you need help with any
of the above, please advise more details on what you tried, and what
happened, or which part you do not understand.

Regards,
Adam

-- 
Adam Goryachev
Website Managers
www.websitemanagers.com.au


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