vagrant-lxc-ng/lib/vagrant-lxc/container.rb

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# FIXME: Ruby 1.8 users dont have SecureRandom
require 'securerandom'
require 'vagrant/util/retryable'
require 'vagrant/util/subprocess'
require "vagrant-lxc/errors"
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module Vagrant
module LXC
class Container
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# Include this so we can use `Subprocess` more easily.
include Vagrant::Util::Retryable
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CONTAINER_STATE_FILE_PATH = '/tmp/vagrant-lxc-container-state-%<id>s'
def initialize(machine)
@machine = machine
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@logger = Log4r::Logger.new("vagrant::provider::lxc::container")
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end
def create
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# FIXME: Ruby 1.8 users dont have SecureRandom
machine_id = SecureRandom.hex(6)
log, status = lxc(:create, {'--template' => 'ubuntu-cloud', '--name' => machine_id}, {'-S' => '/home/vagrant/.ssh/id_rsa.pub'})
machine_id
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end
def start
puts 'TODO: Start container'
update!(:running)
end
def halt
update!(:poweroff)
end
def destroy
puts "TODO: Destroy container"
File.delete(state_file_path) if state_file_path
end
def state
# TODO: Grab the real machine state here
read_state_from_file
end
private
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def lxc(command, params, extra = {})
params = params.map { |opt, val| "#{opt}='#{val}'" }
params << '--' if extra.any?
# Handles extra options passed to templates when using lxc-create
params << extra.map { |opt, val| "#{opt} #{val}" }
execute('sudo', "lxc-#{command}", *params.flatten)
end
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def update!(state)
File.open(state_file_path, 'w') { |f| f.print state }
end
def read_state_from_file
if File.exists?(state_file_path)
File.read(state_file_path).to_sym
elsif @machine.id
:unknown
end
end
def state_file_path
CONTAINER_STATE_FILE_PATH % {id: @machine.id}
end
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# 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
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end
end
end