It's a Linux Container Runtime, written with a bit of C and a lot of Ruby.

It aims to do the same of LXC, but with less resources, to be pluggable and more devops friendly.

Notes : It's currently in alpha version not yet read for production. All tests are running on Ubuntu > 12.04 versions.

Enjoy!

On Ubuntu you must first prepare your network to support bridges:

First install the brigde-utils package:

  $ sudo apt-get install -y bridge-utils

Then edit the file /etc/network/interfaces:

#auto lo
#iface lo inet loopback

auto br0
iface br0 inet dhcp
    bridge_ports eth0
    bridge_fd 0
    bridge_maxwait 0

And finally restart the network:

$ sudo /etc/init.d/networking restart

Jailman requires sudo privileges. To install type :

$ sudo gem install jailman

###Starting a new Jail :

$ sudo jail new first ~/.jails/first

[JAILMAN] Creating Jail first
[JAILMAN] first created

• It creates a new Jail called 'first'.
• It creates a new Root Filesystem at '~/.jails/first'.
• It generates a Config File at '~/.jails/first'

application:
  name : [Application Name]
  repository: [Git repository Url]
run:
  commands:
    # Here you put your list of commands
    #- bundle install
    #- bundle exec rails s -p 8888

$ sudo jail runner first 'free -m'

total       used       free     shared    buffers     cached
Mem:      16319304    4571076   11748228          0     293064    1617360
-/+ buffers/cache:    2660652   13658652
Swap:     33318908          0   33318908

###List Jails

$ sudo jail list

+-------+-------+-------------------------------+---------+
| PID   | NAME  | DIRECTORY                     | STATUS  |
| 18600 | first | /home/user/.jails/first       | STARTED |
+-------+-------+-------------------------------+---------+

###Destroy a Jail

$ sudo jail destroy first

[JAILMAN] Destroy Container : first
[JAILMAN] first destroyed

It requires sudo privileges.

$ sudo rake spec

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request