module Vagrant module LXC module Action class FetchIpFromDnsmasqLeases def initialize(app, env) @app = app @logger = Log4r::Logger.new("vagrant::lxc::action::fetch_ip_from_dnsmasq_leases") end def call(env) env[:machine_ip] ||= assigned_ip(env) @app.call(env) end def assigned_ip(env) mac_address = env[:machine].provider.driver.mac_address ip = nil 10.times do dnsmasq_leases = read_dnsmasq_leases @logger.debug "Attempting to load ip from dnsmasq leases (mac: #{mac_address})" @logger.debug dnsmasq_leases if dnsmasq_leases =~ /#{Regexp.escape mac_address}\s+([0-9.]+)\s+/ ip = $1.to_s break else @logger.debug 'Ip could not be parsed from dnsmasq leases file' sleep 2 end end ip end LEASES_PATHS = %w( /var/lib/misc/dnsmasq.*.leases /var/lib/misc/dnsmasq.leases /var/lib/dnsmasq/dnsmasq.leases /var/db/dnsmasq.leases /var/lib/libvirt/dnsmasq/*.leases ) def read_dnsmasq_leases Dir["{#{LEASES_PATHS.join(',')}}"].map do |file| File.read(file) end.join("\n") end end end end end