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Re: [libvirt] Using Libvirt to change the bridge a virtual network card of a running vm is connected to



On 01/20/2012 11:05 AM, Ralf Spenneberg wrote:
Hi there,

we are using libvirt to manage our VMs. We have several VMs connected to
different bridges on the same physical KVM host. We need to change the
bridge a virtual machine is connected to once in a while. Currently we
are just using brctl to do that. Since this needs to be done over the
network we would like to use the Libvirtd. Currently this does not seem
possible. We have not found any interface or function within the libvirt
library to implement this in a live VM. Only shutdown VMs may be changed
via editing the XML representation.

One way to do this would be to detach the network device, then reattach it with the configuration changed. Of course this would result in the guest seeing its network device disappear, then re-appear again, which is probably not what you want (although it's still a bit better than shutting down the entire guest).



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