Installing a Ubuntu 22.04 hypervisor
curl https://install.virtfusion.net/install-hypervisor-kvm-ubuntu-22-04.sh | sh -s -- --verbose
Once the installer has completed, you may add it to the control server.
Network setup
VirtFusion supports MacVTap, Bridge, Libvirt routed and Libvirt networking.
MacVTap networking
MacVTap is a device driver meant to simplify virtualized bridged networking. It replaces the combination of the tun/tap and bridge drivers with a single module based on the macvlan device driver.
This option has a limitation that you cannot filter traffic and you will lose IP Anti-Hijacking functionality.
No configuration required.
Standard bridge networking
On Ubuntu a standard NetPlan configuration file will look similar to this. Your configuration can be found in /etc/netplan/
.
network:
version: 2
ethernets:
ens3:
addresses:
- <IPADDRESS>
gateway4: <GATEWAY>
nameservers:
addresses:
- <DNS1>
- <DNS2>
This will need to be modified to the following.
network:
version: 2
ethernets:
ens3:
dhcp4: false
bridges:
br0:
interfaces:
- ens3
addresses:
- <IPADDRESS>
gateway4: <GATEWAY>
nameservers:
addresses:
- <DNS1>
- <DNS2>
parameters:
stp: true
forward-delay: 0
dhcp4: false
Once the bridge is set up, networking will need to be tested and restarted.
netplan try
netplan apply
Libvirt routed networking
No modification of the main networking configuration is required.
Network configuration
Defining a Libvirt network is reasonably straightforward and should be low maintenance.
Create a file named network.xml with the following contents.
<network>
<name>br0</name>
<forward mode='route' dev="eth0"/>
<bridge name='br0' stp='on' delay='0'/>
<ip address='10.0.0.1' netmask='255.255.255.0'/>
<ip family="ipv6" address="2001:db8:aa::1" prefix="64"/>
</network>
- If you don't require IPv6 you may remove the
family="ipv6"
line. - Replace
eth0
with the device name of the main network. - Replace
10.0.0.1
with your own subnet that is to be assigned to the server and the corresponding netmask. - If you require IPv6, replace the
address
with your own subnet and the correspondingprefix
.
Define the network, set it to autostart and start it.
virsh net-define --file network.xml
virsh net-autostart br0
virsh net-start br0
Network setup is now complete. You should use the main IP of the hypervisor as the gateway for the defined subnet.
Notes
Although it's not advised, you may install a hypervisor directly on the control server. This allows for a single server setup.