Docker implemented in around 100 lines of bash


The following packages are needed to run bocker.

  • btrfs-progs
  • curl
  • iproute2
  • iptables
  • libcgroup-tools
  • util-linux >= 2.25.2
  • coreutils >= 7.5

Because most distributions do not ship a new enough version of util-linux you will probably need to grab the sources from here and compile it yourself.

Additionally your system will need to be configured with the following:

  • A btrfs filesystem mounted under
  • A network bridge called and an IP of
  • IP forwarding enabled in
  • A firewall routing traffic from to a physical interface.

For ease of use a Vagrantfile is included which will build the needed environment.

Even if you meet the above prerequisites you probably still want to run bocker in a virtual machine. Bocker runs as root and among other things needs to make changes to your network interfaces, routing table, and firewall rules. I can make no guarantees that it won’t trash your system.

Example Usage

$ bocker pull centos 7

Full-stack developer and Open Source contributor — ·

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store