Installing a AlmaLinux 8 hypervisor
curl https://install.virtfusion.net/install-hypervisor-kvm-rhel-8.sh | sh -s -- --verbose
Once the installer has completed, you may add it to the control server.
VirtFusion supports MacVTap, Bridge, Libvirt routed and Libvirt 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 RHEL a standard /etc/sysconfig/network-scripts/ifcfg-eth0 file will look similar to this.
TYPE="Ethernet" BOOTPROTO="none" DEFROUTE="yes" IPV4_FAILURE_FATAL="no" IPV6INIT="yes" IPV6_AUTOCONF="yes" IPV6_DEFROUTE="yes" IPV6_FAILURE_FATAL="no" IPV6_ADDR_GEN_MODE="stable-privacy" NAME="eth0" DEVICE="eth0" ONBOOT="yes" IPADDR="xxx.xxx.xxx.xxx" GATEWAY="xxx.xxx.xxx.xxx" NETMASK="255.255.255.0" DNS1="188.8.131.52" IPV6_PRIVACY="no"
Make a copy of the original file.
cp /etc/sysconfig/network-scripts/ifcfg-eth0 /root/ifcfg-eth0
Create a new file for the bridge.
And copy the networking parts from /etc/sysconfig/network-scripts/ifcfg-eth0 to /etc/sysconfig/network-scripts/ifcfg-br0.
DEVICE=br0 TYPE=Bridge BOOTPROTO=static ONBOOT=yes IPV6_AUTOCONF=yes IPV6_DEFROUTE=yes IPV6_PEERDNS=yes IPV6_PEERROUTES=yes IPV6_FAILURE_FATAL=no IPADDR=xxx.xxx.xxx.xxx NETMASK=255.255.255.0 GATEWAY=xxx.xxx.xxx.xxx
Next, remove the networking parts from /etc/sysconfig/network-scripts/ifcfg-eth0.
BRIDGE=br0 TYPE="Ethernet" DEFROUTE="yes" IPV4_FAILURE_FATAL="no" IPV6INIT="yes" IPV6_AUTOCONF="yes" IPV6_DEFROUTE="yes" IPV6_FAILURE_FATAL="no" IPV6_ADDR_GEN_MODE="stable-privacy" NAME="eth0" DEVICE="eth0" ONBOOT="yes" DNS1="184.108.40.206" IPV6_PRIVACY="no"
Once the bridge is set up, networking will need to be restarted.
systemctl restart NetworkManager.service
Libvirt routed networking
No modification of the main networking configuration is required.
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
eth0with the device name of the main network.
10.0.0.1with your own subnet that is to be assigned to the server and the corresponding netmask.
- If you require IPv6, replace the
addresswith your own subnet and the corresponding
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.
Although it's not advised, you may install a hypervisor directly on the control server. This allows for a single server setup.