Gestionnaire de fichiers - Editer - /usr/lib/python2.7/site-packages/cloudinit/dhclient_hook.py
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# This file is part of cloud-init. See LICENSE file for license information. """Run the dhclient hook to record network info.""" import argparse import os from cloudinit import atomic_helper from cloudinit import log as logging from cloudinit import stages LOG = logging.getLogger(__name__) NAME = "dhclient-hook" UP = "up" DOWN = "down" EVENTS = (UP, DOWN) def _get_hooks_dir(): i = stages.Init() return os.path.join(i.paths.get_runpath(), 'dhclient.hooks') def _filter_env_vals(info): """Given info (os.environ), return a dictionary with lower case keys for each entry starting with DHCP4_ or new_.""" new_info = {} for k, v in info.items(): if k.startswith("DHCP4_") or k.startswith("new_"): key = (k.replace('DHCP4_', '').replace('new_', '')).lower() new_info[key] = v return new_info def run_hook(interface, event, data_d=None, env=None): if event not in EVENTS: raise ValueError("Unexpected event '%s'. Expected one of: %s" % (event, EVENTS)) if data_d is None: data_d = _get_hooks_dir() if env is None: env = os.environ hook_file = os.path.join(data_d, interface + ".json") if event == UP: if not os.path.exists(data_d): os.makedirs(data_d) atomic_helper.write_json(hook_file, _filter_env_vals(env)) LOG.debug("Wrote dhclient options in %s", hook_file) elif event == DOWN: if os.path.exists(hook_file): os.remove(hook_file) LOG.debug("Removed dhclient options file %s", hook_file) def get_parser(parser=None): if parser is None: parser = argparse.ArgumentParser(prog=NAME, description=__doc__) parser.add_argument( "event", help='event taken on the interface', choices=EVENTS) parser.add_argument( "interface", help='the network interface being acted upon') # cloud-init main uses 'action' parser.set_defaults(action=(NAME, handle_args)) return parser def handle_args(name, args, data_d=None): """Handle the Namespace args. Takes 'name' as passed by cloud-init main. not used here.""" return run_hook(interface=args.interface, event=args.event, data_d=data_d) if __name__ == '__main__': import sys parser = get_parser() args = parser.parse_args(args=sys.argv[1:]) return_value = handle_args( NAME, args, data_d=os.environ.get('_CI_DHCP_HOOK_DATA_D')) if return_value: sys.exit(return_value) # vi: ts=4 expandtab
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