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Sunday, September 13, 2020

Web development in LXC / LXD containers on Ubuntu

Here is how to do web development using the very fast Ubuntu native LXC/LXD containers. Part of the Practical Ubuntu Linux Server for beginners course.



First lets install lxd in our system:
sudo snap install lxd

Then initialize the basic environment:
sudo lxd init

We will also fetch image from a repository: linuxcontainers.org

and will start a container based on it:
sudo lxc launch images:alpine/3.10/amd64 webdevelopment

Let's see what we have in the system:
sudo lxc ls
sudo lxc storage ls
sudo lxc network ls

Now it is time to access the container with: sudo lxc exec webdevelopment sh
and then we will use apk to install openssh
apk add openssh-server
lets' also add unprivileged user in order to access the ssh:
adduser webdev

we will also start the server: 

service sshd start

Ok let's check with: ip a the address of the container.

Now we exit the shell(sh) and we can connect to the container using our new user: ssh webdev@ip address of container

Alright, now go back inside the container and will add the Apache service:
apk add apache2
service apache2 restart

Optional:

If we need to get rid of the container we need to stop it first:
sudo lxc stop demo
sudo lxc delete demo

If we need to get rid of the created storage pool, we run the following:
printf 'config: {}\ndevices: {}' | lxc profile edit default
lxc storage delete default

If we need to remove the created network bridge we can run:
sudo lxc network delete lxdbr0

Congratulations and happy learning !

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