I think I found it-- vnet0 does not have an ip address on the host, so dnsmasq won't work. If I do:
$ sudo ifconfig vnet0 192.168.122.1
on the host, then dnsmasq starts working again for libvirt guests
I think I found it-- vnet0 does not have an ip address on the host, so dnsmasq won't work. If I do:
$ sudo ifconfig vnet0 192.168.122.1
on the host, then dnsmasq starts working again for libvirt guests