I just recently started to use Qemu/KVM.
So far I have created only one VM for LinuxMint.
After some initial successful starts, reboots and shutdowns, I am getting the following error now when trying to launch the VM:
Details
Error starting domain: Requested operation is not valid: network 'default' is not active
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/asyncjob.py", line 101, in tmpcb
callback(*args, **kwargs)
File "/usr/share/virt-manager/virtManager/object/libvirtobject.py", line 57, in newfn
ret = fn(self, *args, **kwargs)
File "/usr/share/virt-manager/virtManager/object/domain.py", line 1329, in startup
self._backend.create()
File "/usr/lib/python3.10/site-packages/libvirt.py", line 1353, in create
raise libvirtError('virDomainCreate() failed')
libvirt.libvirtError: Requested operation is not valid: network 'default' is not active
Virtual Network Interface
Network source: Virtual Network ‘default’: NAT (Inactive)
Device model: virtio
Link state: active
I’ll be grateful for any and all suggestions, pointers and advice for resolving the issue!
If you Google “Error starting domain: Requested operation is not valid: network ‘default’ is not active” you get a whole lot of returns…here’s one from the libvert Wiki…
You’ll probably still get a lot of returns even if you’re scared of Google and use some other search engine.
One of the most common causes for a libvirt virtual network’s failure to start is that the dnsmasq instance required to serve DHCP and DNS requests from clients on that network failed to start. To determine if this was the cause, run the following command from a root shell:
virsh net-start default
If it is successful, the problem was some other intermittent condition that has now passed.
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