virsh

To completey remove a VM (domain)

virsh undefine --domain ns01.lunartech.tech
virsh destroy --domain ns01.lunartech.tech
virsh pool-refresh default 
virsh vol-delete --pool default --vol ns01.lunartech.tech.qcow2

Get the VNC/Spice port of a VM

virsh domdisplay --domain [DOMAIN]

Libvirt Network Types

• NAT (default).
• Routed. Requires static routing set up on a router.

• Isolated.

• Bridged. Essentially manual and not managed by libvirt. Harder but stops libvirt manipulating iptables by itself.

To Create An Isolated Network

Create an isolated.xml file:

<network>
  <name>isolated</name>
  <bridge name="isolated" />
  <ip address="172.16.5.0" netmask="255.255.255.0">
    <dhcp>
      <range start="172.16.5.2" end="172.16.5.128"/>
    </dhcp>
  </ip> 
</network>

Define the network: virsh net-define isolated.xml

Enable virsh console Access on CentOS8/RHEL8

Edit /etc/default/grub and add the following to the kernel line: console=tty0 console=ttyS0,115200

Re-build GRUB (UEFI): grub2-mkconfig -o /boot/efi/EFI/centos/grub.cfg

Connect via the serial console: virsh console --domain VM_NAME