4 # Useful information can be found at https://svn.planet-lab.org/wiki/NodeManager
7 # Faiyaz Ahmed <faiyaza at cs dot princeton dot edu>
8 # Copyright (C) 2008 The Trustees of Princeton University
24 from config import Config
25 from plcapi import PLCAPI
30 savedargv = sys.argv[:]
32 known_modules=['conf_files', 'sm', 'bwmon', 'vsys', 'codemux']
34 parser = optparse.OptionParser()
35 parser.add_option('-d', '--daemon', action='store_true', dest='daemon', default=False, help='run daemonized')
36 parser.add_option('-s', '--startup', action='store_true', dest='startup', default=False, help='run all sliver startup scripts')
37 parser.add_option('-f', '--config', action='store', dest='config', default='/etc/planetlab/plc_config', help='PLC configuration file')
38 parser.add_option('-k', '--session', action='store', dest='session', default='/etc/planetlab/session', help='API session key (or file)')
39 parser.add_option('-p', '--period', action='store', dest='period', default=600, help='Polling interval (sec)')
40 parser.add_option('-r', '--random', action='store', dest='random', default=301, help='Range for additional random polling interval (sec)')
41 parser.add_option('-v', '--verbose', action='store_true', dest='verbose', default=False, help='more verbose log')
42 parser.add_option('-P', '--path', action='store', dest='path', default='/usr/share/NodeManager/plugins', help='Path to plugins directory')
43 parser.add_option('-m', '--module', action='store', dest='module', default='', help='run a single module among '+' '.join(known_modules))
44 (options, args) = parser.parse_args()
46 # Deal with plugins directory
47 if os.path.exists(options.path):
48 sys.path.append(options.path)
49 known_modules += [i[:-3] for i in os.listdir(options.path) if i.endswith(".py") and (i[:-3] not in known_modules)]
54 '''Run call backs defined in modules'''
56 logger.log("Syncing w/ PLC")
57 data = plc.GetSlivers()
60 # XXX So some modules can at least boostrap.
63 logger.log_slivers(data)
64 # Set i2 ip list for nodes in I2 nodegroup.
65 try: net.GetSlivers(plc, data)
66 except: logger.log_exc()
67 # All other callback modules
68 for module in modules:
70 callback = getattr(module, 'GetSlivers')
72 except: logger.log_exc()
76 if options.daemon: tools.daemon()
80 logger.set_level(logger.LOG_VERBOSE)
82 # Load /etc/planetlab/plc_config
83 config = Config(options.config)
86 other_pid = tools.pid_file()
88 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)
91 print "Warning while writing PID file:", err
93 # Load and start modules
95 assert options.module in known_modules
96 running_modules=[options.module]
97 logger.verbose('Running single module %s'%options.module)
99 running_modules=known_modules
100 for module in running_modules:
102 m = __import__(module)
103 m.start(options, config)
105 except ImportError, err:
106 print "Warning while loading module %s:" % module, err
108 # Load /etc/planetlab/session
109 if os.path.exists(options.session):
110 session = file(options.session).read().strip()
112 session = options.session
114 # Initialize XML-RPC client
115 iperiod=int(options.period)
116 irandom=int(options.random)
117 plc = PLCAPI(config.plc_api_uri, config.cacert, session, timeout=iperiod/2)
121 logger.verbose('mainloop - nm:getSlivers - period=%d random=%d'%(iperiod,irandom))
123 delay=iperiod + random.randrange(0,irandom)
124 logger.verbose('mainloop - sleeping for %d s'%delay)
126 except: logger.log_exc()
129 if __name__ == '__main__':
130 logger.log("Entering nm.py "+id)
131 stacklim = 512*1024 # 0.5 MiB
132 curlim = resource.getrlimit(resource.RLIMIT_STACK)[0] # soft limit
133 if curlim > stacklim:
134 resource.setrlimit(resource.RLIMIT_STACK, (stacklim, stacklim))
135 # for some reason, doesn't take effect properly without the exec()
136 python = '/usr/bin/python'
137 os.execv(python, [python] + savedargv)
140 # This is for debugging purposes. Open a copy of Python and import nm
141 tools.as_daemon_thread(run)