#!/usr/bin/python
+#
+# Useful information can be found at https://svn.planet-lab.org/wiki/NodeManager
+#
+
+# Faiyaz Ahmed <faiyaza at cs dot princeton dot edu>
+# Copyright (C) 2008 The Trustees of Princeton University
+
+
"""Node Manager"""
import optparse
from config import Config
from plcapi import PLCAPI
+import random
+import net
-
+id="$Id$"
savedargv = sys.argv[:]
+known_modules=['conf_files', 'sm', 'bwmon', 'vsys', 'codemux']
+
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='/usr/share/NodeManager/plugins', help='Path to plugins directory')
+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()
- # net needs access to API for i2 nodes.
+ '''Run call backs defined in modules'''
+ try:
+ logger.log("Syncing w/ PLC")
+ data = plc.GetSlivers()
+ except:
+ logger.log_exc()
+ # XXX So some modules can at least boostrap.
+ data = {}
+ if (options.verbose):
+ logger.log_slivers(data)
+ # Set i2 ip list for nodes in I2 nodegroup.
+ try: net.GetSlivers(plc, data)
+ except: logger.log_exc()
+ # All other callback modules
for module in modules:
- if module.__name__ == 'net':
- module.GetSlivers(plc, data)
- else:
+ try:
callback = getattr(module, 'GetSlivers')
callback(data)
+ except: logger.log_exc()
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)
print "Warning while writing PID file:", err
# Load and start modules
- for module in ['net', 'proper', 'conf_files', 'sm']:
+ 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)
session = options.session
# 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)
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(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__':
+ logger.log("Entering nm.py "+id)
stacklim = 512*1024 # 0.5 MiB
curlim = resource.getrlimit(resource.RLIMIT_STACK)[0] # soft limit
if curlim > stacklim: