[Pkg-libvirt-maintainers] Bug#895145: Bug#895145: virt-manager: fails to start networks

[Guido Günther]

control: reassign -1 libvirt

Hi,
On Sat, Apr 07, 2018 at 07:25:01PM +0200, Christoph Anton Mitterer wrote:
> Package: virt-manager
> Version: 1:1.4.3-1
> Severity: important
> 
> 
> Hi.
> 
> Since the most recent upgrade, when I try to start a network from the GUI:
> Error starting network 'main': internal error: Failed to initialize a valid firewall backend
> 
> Traceback (most recent call last):
>   File "/usr/share/virt-manager/virtManager/asyncjob.py", line 89, in cb_wrapper
>     callback(asyncjob, *args, **kwargs)
>   File "/usr/share/virt-manager/virtManager/asyncjob.py", line 125, in tmpcb
>     callback(*args, **kwargs)
>   File "/usr/share/virt-manager/virtManager/libvirtobject.py", line 82, in newfn
>     ret = fn(self, *args, **kwargs)
>   File "/usr/share/virt-manager/virtManager/network.py", line 81, in start
>     self._backend.create()
>   File "/usr/lib/python2.7/dist-packages/libvirt.py", line 2947, in create
>     if ret == -1: raise libvirtError ('virNetworkCreate() failed', net=self)
> libvirtError: internal error: Failed to initialize a valid firewall backend

This is likely relate to another report I got via private mail where
libvirtd looks for iptables in the wrong path. Please check the libvirt
logs. Using firewalld should work around this.
 -- Guido