vagrant-lxc-ng/lib/vagrant-lxc/action/fetch_ip_from_dnsmasq_leases.rb
2014-03-13 09:49:24 +00:00

49 lines
1.4 KiB
Ruby

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