Skip to content

Latest commit

 

History

History
71 lines (60 loc) · 3.11 KB

INSTALL_QEMU_KVM.md

File metadata and controls

71 lines (60 loc) · 3.11 KB
Raw

Install QEMU/KVM on Ubuntu 24.04

Install QEMU/KVM and libvirtd

sudo apt-get update
sudo apt-get install qemu-kvm libvirt-daemon-system
# if you want to install images from ISOs with virt-install
sudo apt-get install virtinst

Make sure the current user is a member of the libvirt and kvm groups

$ sudo adduser $(id -un) libvirt
Adding user '<username>' to group 'libvirt' ...
$ sudo adduser $(id -un) kvm
Adding user '<username>' to group 'kvm' ...

Run virt-host-validate to check your setup:

$ virt-host-validate qemu
  QEMU: Checking for hardware virtualization                                 : PASS
  QEMU: Checking if device /dev/kvm exists                                   : PASS
  QEMU: Checking if device /dev/kvm is accessible                            : PASS
  QEMU: Checking if device /dev/vhost-net exists                             : PASS
  QEMU: Checking if device /dev/net/tun exists                               : PASS
  QEMU: Checking for cgroup 'cpu' controller support                         : PASS
  QEMU: Checking for cgroup 'cpuacct' controller support                     : PASS
  QEMU: Checking for cgroup 'cpuset' controller support                      : PASS
  QEMU: Checking for cgroup 'memory' controller support                      : PASS
  QEMU: Checking for cgroup 'devices' controller support                     : WARN (Enable 'devices' in kernel Kconfig file or mount/enable cgroup controller in your system)
  QEMU: Checking for cgroup 'blkio' controller support                       : PASS
  QEMU: Checking for device assignment IOMMU support                         : PASS
  QEMU: Checking if IOMMU is enabled by kernel                               : PASS
  QEMU: Checking for secure guest support                                    : WARN (Unknown if this platform has Secure Guest support)

X86_64-based machines will likely display a warning about cgroup devices controller support not being enabled. This allos you to apply resource management to virtual machines. For more information refer to this doc. To add cgroup 'devices' controller support, edit /etc/default/grub and change the line that looks like GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to:

# GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_iommu=on systemd.unified_cgroup_hierarchy=0"

And then run update-grub to update your boot options:

sudo update-grub

Reboot and then everything in virt-host-validate should pass. The tool can't validate secure guest support on Intel chips, only on AMD or IBM processors, so the warning is accurate there: https://stackoverflow.com/questions/65207563/qemu-warn-unknown-if-this-platform-has-secure-guest-support

Also make sure that the packages with the UEFI firmware are present - on Ubuntu these should be installed automatically when qemu-kvm is installed:

# Open Virtual Machine Firmware for X86-64 processors
# Files are in /usr/share/OVMF
sudo apt-get install ovmf
# ARM Architecture Virtual Machine firmware
# Files are in /usr/share/AAVMF
sudo apt-get install qemu-efi-aarch64