Setup KVM on Ubuntu 20.04
Performance appraisal has been done via attempt to set up Ubuntu 20.04 (L0) as KVM virtualization host installing Qemu && Libvirt per
https://computingforgeeks.com/install-kvm-hypervisor-on-ubuntu-focal-fossa/
L1-ManjaroGDM 19.02 Guest is starting up CentOS 8.1 Server domain at Level L2. L1 and L2 guests got their XML profiles updated with <cpu mode='host-passthrough'> in virsh console of parent domains. Following below is the set commands setting up KVM Hypervisor on Ubuntu 20.04 (beta) on bare metal :-
$ sudo apt -y install qemu-kvm \
libvirt-daemon bridge-utils \
virtinst libvirt-daemon-system
$ sudo apt -y install virt-top libguestfs-tools \
libosinfo-bin qemu-system virt-manager
$ sudo modprobe vhost_net
$ lsmod | grep vhost
vhost_net 24576 0
tun 49152 1 vhost_net
vhost 49152 1 vhost_net
tap 28672 1 vhost_net
$ echo vhost_net | sudo tee -a /etc/modules
$ sudo shutdown -r now
Please, be aware that successful install KVM on Ubuntu 20.04 might require in meantime CPU's generation Haswell at least.
See https://bugs.launchpad.net/qemu/+bug/1866870
Bug is pending at Launchpad.net regarding issues with Penryn's (2007) based boxes.
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Setup KVM on Mangaro Gnome 19.02 L1 Guest
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$ sudo pacman -S qemu virt-manager virt-viewer \
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https://computingforgeeks.com/install-kvm-hypervisor-on-ubuntu-focal-fossa/
L1-ManjaroGDM 19.02 Guest is starting up CentOS 8.1 Server domain at Level L2. L1 and L2 guests got their XML profiles updated with <cpu mode='host-passthrough'> in virsh console of parent domains. Following below is the set commands setting up KVM Hypervisor on Ubuntu 20.04 (beta) on bare metal :-
$ sudo apt -y install qemu-kvm \
libvirt-daemon bridge-utils \
virtinst libvirt-daemon-system
$ sudo apt -y install virt-top libguestfs-tools \
libosinfo-bin qemu-system virt-manager
$ sudo modprobe vhost_net
$ lsmod | grep vhost
vhost_net 24576 0
tun 49152 1 vhost_net
vhost 49152 1 vhost_net
tap 28672 1 vhost_net
$ echo vhost_net | sudo tee -a /etc/modules
$ sudo shutdown -r now
Please, be aware that successful install KVM on Ubuntu 20.04 might require in meantime CPU's generation Haswell at least.
See https://bugs.launchpad.net/qemu/+bug/1866870
Bug is pending at Launchpad.net regarding issues with Penryn's (2007) based boxes.
**********************************************
Setup KVM on Mangaro Gnome 19.02 L1 Guest
**********************************************
$ sudo pacman -S qemu virt-manager virt-viewer \
dnsmasq vde2 bridge-utils openbsd-netcat
$ sudo pacman -S ebtables iptables
$ sudo systemctl enable libvirtd.service
$ sudo systemctl start libvirtd.service
Tune /etc/libvirt/libvirtd.conf : unix_sock_group = "libvirt" (line 85) unix_sock_rw_perms = "0770" (line 102) When done restart libvirtd daemon. Changes been done will suppress prompt for root password at Virt-Manager startup. They are, actually, optional.
$ sudo usermod -a -G libvirt $(whoami)
$ newgrp libvirt
$ sudo systemctl restart libvirtd.service
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Define network openstackvms.xml on the Manjaro Guest
# cat openstackvms.xml
<network>
<name>openstackvms</name>
<uuid>d0e9964a-f91a-40c0-b769-a609aee41bf2</uuid>
<forward mode='nat'>
<nat>
<port start='1024' end='65535'/>
</nat>
</forward>
<bridge name='virbr1' stp='on' delay='0' />
<mac address='52:54:00:60:f8:6d'/>
<ip address='192.169.142.1' netmask='255.255.255.0'>
<dhcp>
<range start='192.169.142.2' end='192.169.142.254' />
</dhcp>
</ip>
</network>
This network would allow to launch VM on Manjaro Gnome 19.02 guest.
$ sudo virsh --connect qemu:///system net-define \ /home/boris/openstackvms.xml
$ sudo virsh --connect qemu:///system net-start openstackvms
$ sudo virsh --connect qemu:///system \
net-autostart openstackvms
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$ sudo pacman -S ebtables iptables
$ sudo systemctl enable libvirtd.service
$ sudo systemctl start libvirtd.service
Tune /etc/libvirt/libvirtd.conf : unix_sock_group = "libvirt" (line 85) unix_sock_rw_perms = "0770" (line 102) When done restart libvirtd daemon. Changes been done will suppress prompt for root password at Virt-Manager startup. They are, actually, optional.
$ sudo usermod -a -G libvirt $(whoami)
$ newgrp libvirt
$ sudo systemctl restart libvirtd.service
# cat openstackvms.xml
<network>
<name>openstackvms</name>
<uuid>d0e9964a-f91a-40c0-b769-a609aee41bf2</uuid>
<forward mode='nat'>
<nat>
<port start='1024' end='65535'/>
</nat>
</forward>
<bridge name='virbr1' stp='on' delay='0' />
<mac address='52:54:00:60:f8:6d'/>
<ip address='192.169.142.1' netmask='255.255.255.0'>
<dhcp>
<range start='192.169.142.2' end='192.169.142.254' />
</dhcp>
</ip>
</network>
This network would allow to launch VM on Manjaro Gnome 19.02 guest.
$ sudo virsh --connect qemu:///system net-define \ /home/boris/openstackvms.xml
$ sudo virsh --connect qemu:///system net-start openstackvms
$ sudo virsh --connect qemu:///system \
net-autostart openstackvms
