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Re: [libvirt] running with UID != 0: internal error about bridged network



On Wed, Aug 05, 2009 at 02:51:14PM +0200, Harald Dunkel wrote:
> Hi folks,
> 
> I would like to avoid running the virtual hosts with UID=0.
> But if I try to create a new virtual machine without being
> root, then it fails with
> 
> % name=Lenny_amd64
> % kvmdir=/local/kvm
> % mkdir -p $kvmdir/$name
> % qemu-img create -f qcow2 $kvmdir/$name/hda.qcow2 32G
> Formatting '/local/kvm/Lenny_amd64/hda.qcow2', fmt=qcow2, size=33554432 kB
> % virt-install --connect=qemu:///session -n $name -r 1024 -vcpus=1 -f 

The 'qemu:///session' URIs do not have any ability to use bridge/tap based
networking modes I'm afraid.  qemu:///system is the only option for that
kind of networking at this point in time.

With the release of libvirt 0.7.0, you can configure qemu:///system to run
the QEMU instances as a non-root user id. ie, libvirtd runs as root, but
qemu can be told to run  as 'qemu'. That is probably the best bet for the
case you have. NB by default it uses root, you have to give are argument
to configure at build time to change it, or edit /etc/libvirt/qemu.conf

Daniel
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