magic.md

Edit your network and add your domain (<domain name='example.com' localOnly='yes'/>) to the network definition. All of your hosts using this network must have hostnames (hostnamectl set-hostname) within the domain.

sudo virsh net-edit default

<network>
  <name>default</name>
  <uuid>a4879b25-1c92-49d6-986b-e9e2cde27678</uuid>
  <forward mode='nat'/>
  <bridge name='virbr0' stp='on' delay='0'/>
  <mac address='52:54:00:5e:35:9c'/>
  <!-- *~ magic ~* all VM hostnames must match *.example.com *~ magic ~* -->
  <domain name='example.com' localOnly='yes'/>
  <ip address='192.168.122.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='192.168.122.2' end='192.168.122.254'/>
    </dhcp>
  </ip>
</network>

Destroy the network and recreate it.

sudo virsh net-destroy default
sudo virsh net-start default

Tell NetworkManager what's up.

/etc/NetworkManager/conf.d/localdns.conf:

[main]
dns=dnsmasq

The address line below allows all *.apps.example.com to resolve to 192.168.122.186. A router should exist on this IP address.

/etc/NetworkManager/dnsmasq.d/libvirt_dnsmasq.conf:

address=/apps.example.com/192.168.122.186
server=/example.com/192.168.122.1
addn-hosts=/etc/addn-hosts

Add any static hosts to /etc/addn-hosts.

/etc/addn-hosts:

192.168.122.186 master1.example.com openshift.example.com

Restart services.

systemctl restart NetworkManager
systemctl restart libvirtd