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On Thu, September 4, 2008 08:51, ipvsuser wrote:
> David Dyer-Bennet wrote:
>> Still trying to get my first LVS config going.
>
> This may not be helpful, but I run a bunch of stuff on vanilla domUs
> F8 and never have had any trouble
Well, it's hopeful at least :-).
> - I don't mess with the default bridge or networking set up by Xen/libvirt
> - I use DR, not NAT
I read that DR is rather more complex and easy to mess up ("ARP problem" I
think), and that it requires compatible OSs on the real servers. And that
the benefit is in increased throughput capability. Our application is a
compute cluster (running small computations in the sub-second to
relatively few seconds range on this hardware), for internal company use
only, so the cost of going through NAT is minimal, and the data transfer
level is very small for the number of connections compared to a public web
server.
> - I use a domU for the director as well as the real servers
How is your Xen networking set up? The default bridge and all?
> - I use keepalived because the only thing the director is "HA"ing is the
> VIPs,
> so HA/ldirector seems like overkill in this case. Put the backup director
> on a
> separate dom0.
So the backup director is the only thing on a dom0 in your config? Sounds
strange, is that an important feature, or just the way it worked out for
you?
And I don't understand about keepalived vs ha/ldirector; I'm running
something called "pulse" (Centos 5.2 LVS install). One of the problems
I'm having is that the pieces of the toolkit aren't laid out clearly,
don't come from the same place, and there's no documentation (nothing
giving any kind of overview).
> - I have domU real servers on the same dom0 as the director and on other
> dom0s
> and I haven't seen any problems.
Good.
> - I would recommend not putting any part of the LVS stuff directly on the
> dom0
> and seeing if that works. Also, I am a DR die hard, but I think esp. in
> the
> case of Xen, it seems to work great, fast set up, painless.
Huh, I thought using *only* dom0 would give me a simpler setup, more like
bare hardware.
--
David Dyer-Bennet, dd-b@xxxxxxxx; http://dd-b.net/
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Dragaera: http://dragaera.info
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