module Vagrant module LXC module Action class FetchIpWithLxcAttach # Include this so we can use `Subprocess` more easily. include Vagrant::Util::Retryable def initialize(app, env) @app = app @logger = Log4r::Logger.new("vagrant::lxc::action::fetch_ip_with_lxc_attach") end def call(env) env[:machine_ip] ||= assigned_ip(env) rescue LXC::Errors::NamespacesNotSupported @logger.info 'The `lxc-attach` command available does not support the --namespaces parameter, falling back to dnsmasq leases to fetch container ip' ensure @app.call(env) end def assigned_ip(env) driver = env[:machine].provider.driver ip = '' retryable(:on => LXC::Errors::ExecuteError, :tries => 10, :sleep => 3) do unless ip = get_container_ip_from_ip_addr(driver) # retry raise LXC::Errors::ExecuteError, :command => "lxc-attach" end end ip end # From: https://github.com/lxc/lxc/blob/staging/src/python-lxc/lxc/__init__.py#L371-L385 def get_container_ip_from_ip_addr(driver) output = driver.attach '/sbin/ip', '-4', 'addr', 'show', 'scope', 'global', 'eth0', namespaces: 'network' if output =~ /^\s+inet ([0-9.]+)\/[0-9]+\s+/ return $1.to_s end end end end end end