LXD - Linux Containers - Lightweight open source virtualisation

A pratical step by step example of virtualisation using Linux Containers (LXD) - https://canonical.com/lxd.

LXD with MariaDB and RabbitMQ in linux containers using Alpine

LXD install

sudo apt update

sudo apt install snapd

sudo snap install lxd

sudo snap refresh lxd

getent group lxd | grep "$USER"

sudo usermod -aG lxd "$USER"

newgrp lxd

lxd init --minimal

acessing via browser (LXD UI)

http://localhost:8443

MariaDB

set and start container

lxc image list images: alpine 3.20 architecture=$(uname -m)

lxc launch images:alpine/3.20 mariadbserver # add --vm here if you want a VM instead a Container

lxc config set mariadbserver limits.memory=500MiB

lxc config set mariadbserver limits.cpu=4

lxc config device override mariadbserver root size=1GiB

lxc restart mariadbserver

lxc info mariadbserver

lxc storage list

install mariadb

lxc exec mariadbserver -- sh

apk update

apk add mariadb mariadb-common mariadb-client

rc-service mariadb setup

# rc-service mariadb start

rc-update add mariadb default

mariadb-secure-installation

add the following at the end of /etc/my.cnf.d/mariadb-server.cnf

[mysqld]

skip-networking=0

skip-bind-address

configure mariadb

lxc exec mariadbserver -- sh

mysql -u root -p

create database somedb;

create user 'user'@'%' identified by 'password';

grant all privileges on somedatabase to 'user'@'%';

lxc snapshot mariadbserver mariadbserver-init

connect to mariadb

lxc list # get the ip address of mariadbserver

mysql -h the_ip_address -u user -p

RabbitMQ

set and start container for rabbitmq

lxc launch images:alpine/3.20 rabbitmqserver # add --vm here if you want a VM instead a Container

lxc config set rabbitmqserver limits.memory=500MiB

lxc config set rabbitmqserver limits.cpu=4

lxc config device override rabbitmqserver root size=1GiB

lxc restart rabbitmqserver

lxc info rabbitmqserver

install rabbitmq

lxc exec rabbitmqserver -- sh

apk update

apk add rabbitmq-server

#rc-service rabbitmq-server start

rc-update add rabbitmq-server default

mkdir /etc/rabbitmq

touch /etc/rabbitmq/enabled_plugins

rabbitmq-plugins enable rabbitmq_management

rabbitmqctl add_user username password

rabbitmqctl set_user_tags username administrator, management

rabbitmqctl set_permissions username ".*" ".*" ".*"

lxc snapshot rabbitmqserver rabbitmqserver-init

acessing ui via browser (RabbitMQ Management UI)

lxc list # get the ip address of rabbitmqserver

http://the_ip_address:15672/

#lxd #lxc #linuxcontainer #virtualisation