[fedora-virt] ubuntu 9.10 KVM on fedora 11 question

[Tom Horsley]

On Tue, 10 Nov 2009 08:03:47 +0000
Mark McLoughlin wrote:

> > Woa! Just happened to notice new symptom. I had an ssh session
> > to one of these ubuntu KVM machines open at the same time I had
> > watched it boot in the console window I opened from virt-manager.
> > Not only did the ssh session freeze, but the console window froze
> > at the same time. I could still ssh in with a new ssh session, but
> > I'm not sure what would take out an ssh session and the console
> > at the same time while leaving the KVM machine up.  
> 
> Are you running virt-manager on the same machine as the guests? i.e. is
> virt-manager connected to qemu:///system ?
> 
> If it's all local, the VNC connection is simply a localhost TCP socket
> between virt-manager and qemu, whereas the ssh is a TCP socket over
> virbr0/vnet0 ethernet to the guest sshd. I can't imagine how both would
> lock up at the same time while qemu is still happily processing packets
> to form a new ssh connection.

Virt-manager was running local on the host machine, but displaying
remotely to my desktop over a forwarded X connection. The ssh session
was from my desktop directly to the virtual machine (all the VMs
are setup using a bridge network). It is indeed weird. Other versions
of linux running in VMs configured pretty much the same way on the same
host don't have these problems. The same ubuntu 9.10 on real hardware
doesn't have the problem. Worse yet, I installed some ubuntu 9.10 virtual
machines at home on a very similar (but much less loaded) KVM setup
as I have at work, and they have never shown the problem. I guess
there are just some things man was not meant to know :-). I'll see
what happens when we install fedora 12 on the host after the official
release.