X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=nm.py;h=55315541f1cb3e4d3f8c5acd42b282424730dc70;hb=refs%2Fheads%2F1.8;hp=e44f78f5383f54998ce37de49f86446082817925;hpb=a0a4f653c1afb9eedae9fa530778b157c3708600;p=nodemanager.git diff --git a/nm.py b/nm.py old mode 100644 new mode 100755 index e44f78f..5531554 --- a/nm.py +++ b/nm.py @@ -1,5 +1,13 @@ #!/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 @@ -7,12 +15,23 @@ import time import xmlrpclib import socket import os +import sys +import resource import logger import tools from config import Config -from plcapi import PLCAPI +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') @@ -20,20 +39,67 @@ parser.add_option('-s', '--startup', action='store_true', dest='startup', defaul 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() +# 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(plc): - data = plc.GetSlivers() +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: - callback = getattr(module, 'GetSlivers') - callback(data) + try: + callback = getattr(module, 'GetSlivers') + callback(data, config, plc) + except: logger.log_exc() + + +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) @@ -46,7 +112,13 @@ def run(): print "Warning while writing PID file:", err # Load and start modules - for module in ['net', 'sm', 'conf_files']: + 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) @@ -58,19 +130,38 @@ def run(): if os.path.exists(options.session): session = file(options.session).read().strip() else: - session = options.session + session = None # Initialize XML-RPC client - plc = PLCAPI(config.plc_api_uri, config.cacert, session, timeout=options.period/2) + 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!") + while True: - try: GetSlivers(plc) - except: logger.log_exc() - time.sleep(options.period) + # 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)