require "vagrant/util/retryable" require "vagrant/util/subprocess" require "vagrant-lxc/errors" module Vagrant module LXC class Driver class CLI attr_accessor :name class TransitionBlockNotProvided < RuntimeError; end class TargetStateNotReached < RuntimeError def initialize(target_state, state) msg = "Target state '#{target_state}' not reached, currently on '#{state}'" super(msg) end end def initialize(sudo_wrapper, name = nil) @sudo_wrapper = sudo_wrapper @name = name @logger = Log4r::Logger.new("vagrant::provider::lxc::container::cli") end def list run(:ls).split(/\s+/).uniq end def version return @version if @version @version = run(:create, '--version') if @version =~ /(lxc version:\s+|)(.+)\s*$/ @version = $2.downcase else # TODO: Raise an user friendly error raise 'Unable to parse lxc version!' end end def config(param) run(:config, param).gsub("\n", '') end def state if @name && run(:info, '--name', @name, retryable: true) =~ /^state:[^A-Z]+([A-Z]+)$/i $1.downcase.to_sym elsif @name :unknown end end def create(template, backingstore, backingstore_options, config_file, template_opts = {}) if config_file config_opts = ['-f', config_file] end extra = template_opts.to_a.flatten extra.unshift '--' unless extra.empty? run :create, '-B', backingstore, '--template', template, '--name', @name, *(backingstore_options.to_a.flatten), *(config_opts), *extra rescue Errors::ExecuteError => e if e.stderr =~ /already exists/i raise Errors::ContainerAlreadyExists, name: @name else raise end end def destroy run :destroy, '--name', @name end def start(options = []) run :start, '-d', '--name', @name, *Array(options) end ## lxc-stop will exit 2 if machine was already stopped # Man Page: # 2 The specified container exists but was not running. def stop attach '/sbin/halt' if supports_attach? begin run :stop, '--name', @name rescue LXC::Errors::ExecuteError => e if e.exitcode == 2 @logger.debug "Machine already stopped, lxc-stop returned 2" else raise e end end end def attach(*cmd) cmd = ['--'] + cmd if cmd.last.is_a?(Hash) opts = cmd.pop namespaces = Array(opts[:namespaces]).map(&:upcase).join('|') # HACK: The wrapper script should be able to handle this if @sudo_wrapper.wrapper_path namespaces = "'#{namespaces}'" end if namespaces extra = ['--namespaces', namespaces] end end run :attach, '--name', @name, *((extra || []) + cmd) end def info(*cmd) run(:info, '--name', @name, *cmd) end def transition_to(target_state, tries = 30, timeout = 1, &block) raise TransitionBlockNotProvided unless block_given? yield self while (last_state = self.state) != target_state && tries > 0 @logger.debug "Target state '#{target_state}' not reached, currently on '#{last_state}'" sleep timeout tries -= 1 end unless last_state == target_state # TODO: Raise an user friendly message raise TargetStateNotReached.new target_state, last_state end end def supports_attach? unless defined?(@supports_attach) begin @supports_attach = true run(:attach, '--name', @name, '--', '/bin/true') rescue LXC::Errors::ExecuteError @supports_attach = false end end return @supports_attach end private def run(command, *args) @sudo_wrapper.run("lxc-#{command}", *args) end end end end end