LXD is growing up, and with Ubuntu Xenial comes a number of changes. Here’s how to get started with the new set-up.
Installing and Configuring LXD
sudo apt update sudo apt install lxd sudo lxd init
To enable local DNS resolution, create a file called /etc/NetworkManager/dnsmasq.d containing:
Then restart network manager:
sudo service NetworkManager restart
Either log off and log back on again or run this to add the lxd group to your user’s group set:
Creating a Container
LXD offers the ability to import images and the like. You probably just want to get started, so let’s create an Ubuntu 16:04 container:
lxc launch ubuntu:16.04 my-xenial
This will download the image (if it hasn’t already) and create a container called “my-xenial”.
Running Commands on the Container
You can now run commands in that container, such as:
lxc exec my-xenial -- hostname
Or to open a bash prompt:
lxc exec my-xenial -- bash
Setting up SSH
Unlike Docker, we have a full init system to play with, and the standard Ubuntu containers include a running ssh server. Let’s make use of that and set up an SSH key to allow login from the host machine.
First push your SSH public key:
lxc file push ~/.ssh/id_rsa.pub my-xenial/home/ubuntu/.ssh/authorized_keys --mode=0600 --uid=1000
Now, because of the dnsmasq config we set up, you can use the hostname to SSH in:
From here, you might want to play with downloading, uploading and serving images. Have fun!