Hi everyone.
I have been try to create an a virtual machine with qemu, libvirt, and libvirt-manager. However, been selected ISO file and clicked on “start”, I get an error such as mentioned in the title of this topic.
¿Could you help me?
Greetings.
Have you been following the guidance in Arch Wiki?
general configuration, group membership, service starting, network setup …
and maybe
It’s solved.
Yes, but I have no so time to read it slowly so I have needed some free days to understand, because my English level is not so high. Nevertheless I have get the solution, I just needed include my user as member of “libvirt” group.
Now I have got an other problem. When I want to create a virtual machine with a virtual network in bridge mode, I get an error like this:
Traceback (most recent call last):
File “/usr/share/virt-manager/virtManager/asyncjob.py”, line 65, in cb_wrapper
callback(asyncjob, *args, **kwargs)
File “/usr/share/virt-manager/virtManager/createvm.py”, line 2001, in _do_async_install
installer.start_install(guest, meter=meter)
File “/usr/share/virt-manager/virtinst/install/installer.py”, line 701, in start_install
domain = self._create_guest(
File “/usr/share/virt-manager/virtinst/install/installer.py”, line 649, in _create_guest
domain = self.conn.createXML(install_xml or final_xml, 0)
File “/usr/lib/python3.9/site-packages/libvirt.py”, line 4366, in createXML
raise libvirtError(‘virDomainCreateXML() failed’)
libvirt.libvirtError: Unable to get interface MTU on ‘MyServer’: Device does not exist
Dependencys are installed (I have checked wiki) and I don’t find the solution on “libvirt - ArchWiki” .
Do you know what could be happening?
Maybe we could tell something
if you told us what you did
how you tried to do the following:
First of all I start “libvirtd” demon with “systemctl”, then run virt-manager and continue all the process to create a virtual machine. However, before to finish that process, when I select network setting as “bridge” (attached image) and I click on “Finalizar” (“finish” in English) to start with the automated process of installation, I have got the error mentioned above.
I think you need to create a bridge device first.
This KB article from RH Access might help. 
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