vagrant-lxc-ng/lib/vagrant-lxc/action/fetch_ip_with_lxc_attach.rb

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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)
config = env[:machine].provider_config
fetch_ip_tries = config.fetch_ip_tries
driver = env[:machine].provider.driver
ip = ''
retryable(:on => LXC::Errors::ExecuteError, :tries => fetch_ip_tries, :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', 'mount']
if output =~ /^\s+inet ([0-9.]+)\/[0-9]+\s+/
return $1.to_s
end
end
end
end
end
end