[Fedora-xen] Fedora 7 - missing dummy interfaces

[David Mueller]

Yes, test_vm is the name of the virtual machine in the second column
of the list in virt-manager.  If I just try to launch virsh I get an
error too:

# virsh
error: failed to connect to the hypervisor
Welcome to virsh, the virtualization interactive terminal.

Type:  'help' for help with commands
       'quit' to quit

virsh #

Note that I am using the standard kernel 2.6.22.1-41.fc7 and not a
xen0 kernel, so it should be using KVM rather than xen.  The computer
has an Intel Core Duo processor with the Virtualization instructions
enabled in BIOS -- the guest VM runs just fine.

- David

On 8/22/07, Per Hjartoy <per at actius.com> wrote:
> Is "test_vm" your guest?  If not, that is what you need to use as an
> argument to virsh and not the Domain-0 (vm container).  --  Per
>
> -----Original Message-----
> From: David Mueller [mailto:dsm717 at gmail.com]
> Sent: Wednesday, August 22, 2007 2:03 PM
> To: Per Hjartoy
> Cc: fedora-xen at redhat.com
> Subject: Re: [Fedora-xen] Fedora 7 - missing dummy interfaces
>
> Per,
>
> Ok.  I was hoping there was something realatively straightforward to change.
>
> I've also been working on a new approach to use KVM with Fedora 7.
> I've been able to use Revisor to create a custom Install CD image and
> used that with virt-manager to create a virtual machine.  However,
> I've run into a wall with virt-manager's insistance on using only
> private IP address space.  Your suggestion to dump the result to xml
> and modify that seems like it might work, except I can't get virsh to
> work:
>
> # virsh dumpxml test_vm
> error: failed to connect to the hypervisor
> error: no valid connection
>
> Where test_vm is the name of my virtual machine in the Name column of
> the virt-manager GUI.  It doesn't make a difference whether or not the
> virtual machine is running at the time.
>
> - David
>
> On 8/22/07, Per Hjartoy <per at actius.com> wrote:
> > David, The configuration has changed quite a bit between F5 and F7.  I've
> > found that there is not much you can do unless you go "virsh dumpxml ...".
> > In my experimentation, I made the most progress when I defined the device
> > with dummy data in the GUI version. I could then dump the result out and
> > make changes in the xml template I got. Finally I would reload by "virsh
> > define ...". Hope this helps. -- Per
> >
> > -----Original Message-----
> > From: fedora-xen-bounces at redhat.com [mailto:fedora-xen-bounces at redhat.com]
> > On Behalf Of David Mueller
> > Sent: Tuesday, August 21, 2007 10:07 AM
> > To: fedora-xen at redhat.com
> > Subject: [Fedora-xen] Fedora 7 - missing dummy interfaces
> >
> > I'm trying to move from Fedora Core 5 to Fedora 7.  I've run into an
> > issue where the xen guests, which need several bridged interfaces
> > bound to dummy devices so they can communicate with each other
> > (similar to host-only networking with VMWare), won't boot.  I think
> > I've traced the problem to a lack of the dummy1, dummy2, and dummy3
> > devices, and I'm not sure how to fix it.  What I'll describe below is
> > the setup that worked in Fedora Core 5:
> >
> > I used the following custom network-bridge script:
> >
> > #!/bin/sh
> > dir=$(dirname "$0")
> > "$dir/network-bridge" "$@" vifnum=0 netdev=dummy0
> > "$dir/network-bridge" "$@" vifnum=1 netdev=dummy1
> > "$dir/network-bridge" "$@" vifnum=2 netdev=dummy2
> > "$dir/network-bridge" "$@" vifnum=3 netdev=dummy3
> >
> > And the following line was used in the .xen files passed to xm create:
> >
> > vif = ['mac=2E:22:22:22:22:20,bridge=xenbr1',
> > 'mac=2E:22:22:22:22:21,bridge=xenbr2',
> > 'mac=2E:22:22:22:22:22,bridge=xenbr3']
> >
> > Running the script resulted in the following:
> >
> > Using config file "./guest1.xen".
> > Error: Device 0 (vif) could not be connected. Could not find bridge
> > device xenbr1
> >
> > If I try to run the custom network-bridge script manually passing the
> > "start" command I get several errors:
> >
> > Device "dummy1" does not exist.
> > usage: ifdown <device name>
> > Device "dummy1" does not exist.
> > Cannot find device "dummy1"
> > SIOCGIFFLAGS: No such device
> > Device "dummy2" does not exist.
> > usage: ifdown <device name>
> > Device "dummy2" does not exist.
> > Cannot find device "dummy2"
> > SIOCGIFFLAGS: No such device
> > Device "dummy3" does not exist.
> > usage: ifdown <device name>
> > Device "dummy3" does not exist.
> > Cannot find device "dummy3"
> > SIOCGIFFLAGS: No such device
> >
> > Any ideas on how to get this working would be greatly appreciated.
> >
> > - David
> >
> > --
> > Fedora-xen mailing list
> > Fedora-xen at redhat.com
> > https://www.redhat.com/mailman/listinfo/fedora-xen
> >
> >
> >
>
>
>