Ruby-LXC

Introduction

Ruby-LXC is a Ruby binding for liblxc. It allows the creation and management of Linux Containers from Ruby scripts.

Build and installation

Assuming a current installation of LXC is available, to install Ruby-LXC simply run the commands below

sudo apt-get install ruby-dev lxc-dev

bundle install
bundle exec rake compile
bundle exec rake gem
gem install pkg/ruby-lxc-1.2.0.gem

or just add this to your Gemfile

gem "ruby-lxc", github: "lxc/ruby-lxc", require: "lxc"

Usage

• Container lifecycle management (create, start, stop and destroy containers)

require 'lxc'
c = LXC::Container.new('foo')
c.create('ubuntu') # create a container named foo with ubuntu template
c.start
# attach to a running container
c.attach do
  LXC.run_command('ifconfig eth0')
end
c.stop
c.destroy

• Container inspection

c.name
c.config_path
c.config_item('lxc.cap.drop')
c.cgroup_item('memory.limit_in_bytes')
c.init_pid
c.interfaces
c.ip_addresses
c.state

• Additional state changing operations (freezing, unfreezing and cloning containers)

c.freeze
c.unfreeze
c.reboot
c.shutdown

• Clone a container

# clone foo into bar. Parent container has to be frozen or stopped.
clone = c.clone('bar')

• Wait for a state change

# wait until container goes to STOPPED state, else timeout after 10 seconds
c.wait(:stopped, 10)

Check the provided rdoc documentation for a full list of methods. You can generate it running

rake rdoc