Linux Desktop Images
List all the desktop amd64 virtual machines in images remote server:
lxc image list images: type=virtual-machine architecture=x86_64 --columns=lLfFpdasut desktop
archlinux/desktop-gnomeArchlinux currentopensuse/15.4/desktop-kdeOpensuse 15.4opensuse/15.5/desktop-kdeOpensuse 15.5opensuse/tumbleweed/desktop-kdeOpensuse tumbleweedubuntu/mantic/desktopUbuntu manticubuntu/focal/desktopUbuntu focalubuntu/jammy/desktopUbuntu jammyubuntu/lunar/desktopUbuntu lunar
Here are some commands related to remote servers:
# configured remote servers
lxc remote list
# get the default remote server
lxc remote get-default
# set 'ubuntu' as the new default remote server
lxc remote switch ubuntu
# list images in the default remote server
lxc image list
# list images in the 'ubuntu' remote server
lxc image list ubuntu:
# list virtual machines with x86_64 architecture in the 'images' remote server
lxc image list images: type=virtual-machine architecture=x86_64 --columns=lLfFpdasut
Create a dedicated LXC profile
lxc profile create LinuxDesktop
lxc profile set LinuxDesktop limits.cpu=4
lxc profile set LinuxDesktop limits.memory=8GiB
lxc profile device add LinuxDesktop root disk \
path=/ pool=default
lxc profile device add LinuxDesktop eth0 nic \
name=eth0 network=lxdbr0
# if you want audio
lxc profile set LinuxDesktop raw.qemu='-device intel-hda -device hda-duplex'
Launch a new image
lxc launch images:ubuntu/jammy/desktop UbuntuDesktop --vm --profile=LinuxDesktop --console=vga
After startup you may want to:
# update the system
sudo apt update && sudo apt -y upgrade
# install the openssh server and add a public key for remote access
ssh_key='ssh-ed25519 AAAA...'
sudo apt install openssh-server
mkdir -p ~/.ssh
chmod 700 ~/.ssh
echo "$ssh_key" > ~/.ssh/authorized_keys
# for audio support
sudo apt install "linux-modules-extra-$(uname -r)"
reboot
To connect to vm’s console use:
lxc console UbuntuDesktop --type=vga
Templating
If you want to make a template out of the modified virtual machine you should generalize it, at least:
- empty the
machine-idfile - delete host keys
- empty log files
- remove unneeded packages and clean the local apt repository
When is stopped publish an image to you local image repository:
lxc publish UbuntuDesktop --public --alias=UbuntuDesktop_Base
Note: An example script for simple generalization of a virtual machine or container is generalize_simple.sh