X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=nm.py;h=55315541f1cb3e4d3f8c5acd42b282424730dc70;hb=refs%2Fheads%2F1.8;hp=3f5260990b5dce143a9dece8e637f6cbac8dad9a;hpb=2bea6afe154924341f57f7b8633b9ca87b53b82f;p=nodemanager.git diff --git a/nm.py b/nm.py old mode 100644 new mode 100755 index 3f52609..5531554 --- a/nm.py +++ b/nm.py @@ -1,50 +1,167 @@ +#!/usr/bin/python + +# +# Useful information can be found at https://svn.planet-lab.org/wiki/NodeManager +# + +# Faiyaz Ahmed +# Copyright (C) 2008 The Trustees of Princeton University + + """Node Manager""" import optparse import time import xmlrpclib +import socket +import os +import sys +import resource import logger -import sm import tools +from config import Config +from plcapi import PLCAPI +import random + +id="$Id$" +savedargv = sys.argv[:] + +# NOTE: modules listed here should also be loaded in this order +known_modules=['net','conf_files', 'sm', 'bwmon'] + +plugin_path = "/usr/share/NodeManager/plugins" parser = optparse.OptionParser() parser.add_option('-d', '--daemon', action='store_true', dest='daemon', default=False, help='run daemonized') parser.add_option('-s', '--startup', action='store_true', dest='startup', default=False, help='run all sliver startup scripts') +parser.add_option('-f', '--config', action='store', dest='config', default='/etc/planetlab/plc_config', help='PLC configuration file') +parser.add_option('-k', '--session', action='store', dest='session', default='/etc/planetlab/session', help='API session key (or file)') +parser.add_option('-p', '--period', action='store', dest='period', default=600, help='Polling interval (sec)') +parser.add_option('-r', '--random', action='store', dest='random', default=301, help='Range for additional random polling interval (sec)') +parser.add_option('-v', '--verbose', action='store_true', dest='verbose', default=False, help='more verbose log') +parser.add_option('-P', '--path', action='store', dest='path', default=plugin_path, help='Path to plugins directory') + +# NOTE: BUG the 'help' for this parser.add_option() wont list plugins from the --path argument +parser.add_option('-m', '--module', action='store', dest='module', default='', help='run a single module among '+' '.join(known_modules)) (options, args) = parser.parse_args() -# XXX - awaiting a real implementation -data = [] +# Deal with plugins directory +if os.path.exists(options.path): + sys.path.append(options.path) + known_modules += [i[:-3] for i in os.listdir(options.path) if i.endswith(".py") and (i[:-3] not in known_modules)] + modules = [] -def GetSlivers(): - for mod in modules: mod.GetSlivers_callback(data) +def GetSlivers(config, plc): + '''Run call backs defined in modules''' + try: + logger.log("Syncing w/ PLC") + data = plc.GetSlivers() + if (options.verbose): logger.log_slivers(data) + getPLCDefaults(data, config) + except: + logger.log_exc() + # XXX So some modules can at least boostrap. + logger.log("nm: Can't contact PLC to GetSlivers(). Continuing.") + data = {} + # Invoke GetSlivers() functions from the callback modules + for module in modules: + try: + callback = getattr(module, 'GetSlivers') + callback(data, config, plc) + except: logger.log_exc() + -def start_and_register_callback(mod): - mod.start(options) - modules.append(mod) +def getPLCDefaults(data, config): + ''' + Get PLC wide defaults from _default system slice. Adds them to config class. + ''' + for slice in data.get('slivers'): + if slice['name'] == config.PLC_SLICE_PREFIX+"_default": + attr_dict = {} + for attr in slice.get('attributes'): attr_dict[attr['tagname']] = attr['value'] + if len(attr_dict): + logger.verbose("Found default slice overrides.\n %s" % attr_dict) + config.OVERRIDES = attr_dict + return + # NOTE: if an _default slice existed, it would have been found above and + # the routine would return. Thus, if we've gotten here, then no default + # slice is bound to this node. + if 'OVERRIDES' in dir(config): del config.OVERRIDES def run(): try: if options.daemon: tools.daemon() + # set log level + if (options.verbose): + logger.set_level(logger.LOG_VERBOSE) + + # Load /etc/planetlab/plc_config + config = Config(options.config) + + try: + other_pid = tools.pid_file() + if other_pid != None: + print """There might be another instance of the node manager running as pid %d. If this is not the case, please remove the pid file %s""" % (other_pid, tools.PID_FILE) + return + except OSError, err: + print "Warning while writing PID file:", err + + # Load and start modules + if options.module: + assert options.module in known_modules + running_modules=[options.module] + logger.verbose('Running single module %s'%options.module) + else: + running_modules=known_modules + for module in running_modules: + try: + m = __import__(module) + m.start(options, config) + modules.append(m) + except ImportError, err: + print "Warning while loading module %s:" % module, err + + # Load /etc/planetlab/session + if os.path.exists(options.session): + session = file(options.session).read().strip() + else: + session = None + + # Initialize XML-RPC client + iperiod=int(options.period) + irandom=int(options.random) + plc = PLCAPI(config.plc_api_uri, config.cacert, session, timeout=iperiod/2) + + #check auth + logger.log("Checking Auth.") + while plc.check_authentication() != True: + try: + plc.update_session() + logger.log("Authentication Failure. Retrying") + except: + logger.log("Retry Failed. Waiting") + time.sleep(iperiod) + logger.log("Authentication Succeeded!") - other_pid = tools.pid_file() - if other_pid != None: - print """There might be another instance of the node manager running as pid %d. If this is not the case, please remove the pid file %s""" % (other_pid, tools.PID_FILE) - return - start_and_register_callback(sm) while True: - try: GetSlivers() - except: logger.log_exc() - time.sleep(10) + # Main NM Loop + logger.verbose('mainloop - nm:getSlivers - period=%d random=%d'%(iperiod,irandom)) + GetSlivers(config, plc) + delay=iperiod + random.randrange(0,irandom) + logger.verbose('mainloop - sleeping for %d s'%delay) + time.sleep(delay) except: logger.log_exc() -if __name__ == '__main__': run() +if __name__ == '__main__': + logger.log("Entering nm.py "+id) + run() else: # This is for debugging purposes. Open a copy of Python and import nm tools.as_daemon_thread(run)