First Steps With Dockerlite

Installation

Clone the repository anywhere you like, e.g.:

cd /opt
git clone git://github.com/jpetazzo/dockerlite

Then you can either add /opt/dockerlite to your $PATH, or create a symlink to /opt/dockerlite/dockerlite, e.g.:

ln -s /opt/dockerlite/dockerlite /usr/local/sbin/dockerlite

Note: Dockerlite requires root privileges. It needs to do call the BTRFS tools, the LXC tools, and manipulate network interfaces; all that stuff requires root privileges.

BTRFS requirements

You need a BTRFS filesystem in /btrfs. There are three main different ways to do that.

If your root filesystem in on BTRFS

Then just create a subvolume in /btrfs with btrfs subvol create btrfs. You're done.

If you have a spare block device or some space on your LVM VG

Format the spare device/partition/LV using BTRFS and mount it on /btrfs.

If you have none of those

Loopback to the rescue!

$ sudo -i
dd if=/dev/zero of=/btrfs.img bs=1024k count=1 seek=2048
mkfs -t btrfs /btrfs.img
mount -o loop /btrfs.img /btrfs

One-time initialization of Dockerlite

Just run dockerlite init and you're done.