[geeks] the virtualization project

[Shannon]

On Sep 17, 2011, at 10:09 , Patrick Finnegan wrote:

> On Friday, September 16, 2011, Shannon wrote:
>> On Sep 9, 2011, at 11:24 , Bill Bradford wrote:
>>> On Fri, Sep 09, 2011 at 12:17:01AM -0400, Shannon wrote:
>>>
>>> ohno.mrbill.net is a Debian 6 quad-core (AMD Athlon II 640) system
>>> with 16 of RAM, with ohno being the "native" host system.  I'm
>>> also running three different VMs under Qemu/KVM; two Debian 6 and
>>> one FreeBSD, paravirtualized (virtio) drivers being used when
>>> possible.  It's been "in production" for 9-10 months now and works
>>> *great*.
>>
>> I spent last nite and this morning installing Debian squeeze.
>>
>> I could not try KVM because the machine has no HVM support, so I
>> tested Xen.
>>
>> The GUI tools for LVM, Xen, and KVM all seem broken, so I gave up
>> playing with them. I was just curious about them. Using the command
>> line tools was just faster and easier.
>
> I didn't realize there were gui tools. Why put a gui on your Dom0 box?
> :)

"I was just curious about them." :)

The default install for Debian includes all kinds of stuff, and I didn't see a
"small install" option so I just hit default.

Also even some command line Xen stuff pulled in tons of GUI code... :(

>> One thing I can't make work is networking for the guest operating
>> systems. They cannot send or receive packets.
>
>
> Try this.
>
> apt-get remove network-manager

I already did that and there was no difference.

> Set up eth0 in /etc/network/interfaces like normal. It should look sorta
> like this:
>
> auto eth0
> interface eth0 inet static
> 	address 192.168.0.2
> 	netmask 255.255.255.0
> 	gateway 192.168.0.1

I normally use DHCP with MAC addresses, but I made a static entry:

auto eth0
iface eth0 inet static
	address 192.168.1.30
	netmask 255.255.255.0
	gateway 192.168.1.1

When I do this, then brctl says this:

bridge name	bridge id	STP		interfaces
eth0		8000.blah blah	NO		peth0

I don't get that... its listing eth0 as a bridge?

I put the following in /etc/network/interfaces (added):

iface br0 inet static
	bridge_ports eth0
	bridge_stp on
	bridge_maxwait 0

Then I get log messages saying "device eth0 is a bridge itself, cannot slave a
bridge to a bridge".

I'm confuzzled. When I last used Linux eth0 was the base ethernet device, not
a bridge, so none of this makes sense right now. This stuff does not work the
way the documentation says.

Now "ifdown eth0" results in "interface eth0 not configured", but its up.

ifconfig eth0 down
ifconfig peth0 down
ifup eth0

That sequenced brings eth0 back up with no br0 in the configuration since I
can't create it anyway.

Still no work.

Will keep playing.

> Now, you want something like this in your /etc/xen/xend-config.sxp:
> (network-script 'network-bridge bridge=br1')
> (vif-script vif-bridge)
>
> And your blah.cfg for your domain should have something like this in it:
> vif = ['bridge=br1']

Yea I have all that, tried with and without the bridge statement.




--
Shannon Hendrix
shannon at widomaker.com