Ubuntu 14.04 and Docker

This is posted here in case it helps anyone but also so I can store the info somewhere.    If you have a fresh Unraid 6.x beta:

1) change your default boot option to use Xen/Unraid (Xen is off by default)

2) Turn on the network bridge br0 so we can share our connection to our new VM

The steps are documented here: http://lime-technology.com/forum/index.php?topic=32733.0

I did not use this but there looks to be a good script to install Ubuntu 14.04 here: http://lime-technology.com/forum/index.php?topic=33132.0

Once you get Ubuntu 14.04 LTS up and running things get pretty easy.  Ubuntu 14.04 LTS has Docker natively packaged.  So to install Docker we just have to:

$ apt-get install docker.io

Now create a container.  This is like inception - we are going to run an Ubuntu container, on Ubuntu, on Slackware.  So pull Ubuntu down:

$ sudo docker.io pull ubuntu

Fire it up:

$ sudo docker.io run -i -t ubuntu /bin/bash

And with that command, Ubuntu is now officially in Docker, on your server. You are now inside of shell in your very own Linux container. Note: just like any shell type `exit` to exit the docker container...

NOTE: Ubuntu uses docker.io as the executable name instead of just docker. This is because of a Debian/Ubuntu policy; there is already a program called “docker”. This can be changed.  Here is a full install script:

# Docker on Ubuntu 14.04 LTS
sudo apt-get install docker.io

#
# if you prefer the command docker over docker.io 
# on Ubuntu 14.04 LTS
#

# Create /usr/bin/docker the Debian/Ubuntu way
# (avoid conflicting with docker – System tray)
sudo update-alternatives –install /usr/bin/docker docker /usr/bin/docker.io 50

# Allow bash completion for docker
sudo cp -a /etc/bash_completion.d/docker{.io,}
sudo sed -i 's/\(docker\)\.io/\1/g' /etc/bash_completion.d/docker

# Allow zsh completion for docker
sudo cp -a /usr/share/zsh/vendor-completions/_docker{.io,}
sudo sed -i 's/\(docker\)\.io/\1/g' /usr/share/zsh/vendor-completions/_docker

# the man page for docker
sudo ln -s /usr/share/man/man1/docker{.io,}.1.gz

# not really needed because docker.io is still there
sudo sed -i 's/\(docker\)\.io/\1/g' /usr/share/docker.io/contrib/*.sh

# Test Docker
sudo docker pull ubuntu
sudo docker run -i -t ubuntu /bin/bash
exit