vagrant-lxc-ng/lib/vagrant-lxc/container.rb
2013-03-02 01:34:47 -03:00

121 lines
3.3 KiB
Ruby

# FIXME: Ruby 1.8 users dont have SecureRandom
require 'securerandom'
require 'vagrant/util/retryable'
require 'vagrant/util/subprocess'
require "vagrant-lxc/errors"
module Vagrant
module LXC
class Container
# Include this so we can use `Subprocess` more easily.
include Vagrant::Util::Retryable
# This is raised if the container can't be found when initializing it with
# an UUID.
class NotFound < StandardError; end
attr_reader :name
def initialize(name)
@name = name
@logger = Log4r::Logger.new("vagrant::provider::lxc::container")
end
def validate!
raise NotFound if @name && ! lxc(:ls).split("\n").include?(@name)
end
def create
# FIXME: Ruby 1.8 users dont have SecureRandom
name = SecureRandom.hex(6)
public_key = Vagrant.source_root.join('keys', 'vagrant.pub').expand_path.to_s
log, status = lxc :create, '--template', 'ubuntu-cloud', '--name', name, '--', '-S', public_key
# TODO: Handle errors
@name = name
end
def start
lxc :start, '-d', '--name', @name
wait_until :running
end
def halt
lxc :shutdown, '--name', @name
wait_until :stopped
end
def destroy
lxc :destroy, '--name', @name
end
def wait_until(state)
lxc :wait, '--name', @name, '--state', state.to_s.upcase
end
def lxc(command, *args)
execute('sudo', "lxc-#{command}", *args)
end
def update!(state)
File.open(state_file_path, 'w') { |f| f.print state }
end
def state
if @name && lxc(:info, '--name', @name) =~ /^state:[^A-Z]+([A-Z]+)$/
$1.downcase.to_sym
elsif @name
:unknown
end
end
# TODO: Review code below this line, it was pretty much a copy and paste from VirtualBox base driver
def execute(*command, &block)
# Get the options hash if it exists
opts = {}
opts = command.pop if command.last.is_a?(Hash)
tries = 0
tries = 3 if opts[:retryable]
# Variable to store our execution result
r = nil
retryable(:on => LXC::Errors::ExecuteError, :tries => tries, :sleep => 1) do
# Execute the command
r = raw(*command, &block)
# If the command was a failure, then raise an exception that is
# nicely handled by Vagrant.
if r.exit_code != 0
if @interrupted
@logger.info("Exit code != 0, but interrupted. Ignoring.")
else
raise LXC::Errors::ExecuteError, :command => command.inspect
end
end
end
# Return the output, making sure to replace any Windows-style
# newlines with Unix-style.
r.stdout.gsub("\r\n", "\n")
end
# Executes a command and returns the raw result object.
def raw(*command, &block)
int_callback = lambda do
@interrupted = true
@logger.info("Interrupted.")
end
# Append in the options for subprocess
command << { :notify => [:stdout, :stderr] }
Vagrant::Util::Busy.busy(int_callback) do
Vagrant::Util::Subprocess.execute(*command, &block)
end
end
end
end
end