#!/usr/bin/python
#
-# $Id$
-# $URL$
-#
# Useful information can be found at https://svn.planet-lab.org/wiki/NodeManager
#
import socket
import os
import sys
-import resource
import glob
import pickle
+import random
+import resource
import logger
import tools
from config import Config
-from plcapi import PLCAPI
-import random
+from plcapi import PLCAPI
class NodeManager:
# the modules in this directory that need to be run
# NOTE: modules listed here will also be loaded in this order
- # once loaded, they get re-ordered after their priority (lower comes first)
+ # once loaded, they get re-ordered after their priority (lower comes first)
# for determining the runtime order
core_modules=['net', 'conf_files', 'slivermanager', 'bwmon']
def __init__ (self):
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=NodeManager.default_period,
+ parser.add_option('-d', '--daemon', action='store_true', dest='daemon', default=False,
+ help='run daemonized')
+ 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=NodeManager.default_period,
help='Polling interval (sec) - default %d'%NodeManager.default_period)
- parser.add_option('-r', '--random', action='store', dest='random', default=NodeManager.default_random,
+ parser.add_option('-r', '--random', action='store', dest='random', default=NodeManager.default_random,
help='Range for additional random polling interval (sec) -- default %d'%NodeManager.default_random)
- 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=NodeManager.PLUGIN_PATH, help='Path to plugins directory')
+ 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=NodeManager.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='user_module', default='', help='run a single module')
# Deal with plugins directory
if os.path.exists(self.options.path):
sys.path.append(self.options.path)
- plugins = [ os.path.split(os.path.splitext(x)[0])[1] for x in glob.glob( os.path.join(self.options.path,'*.py') ) ]
+ plugins = [ os.path.split(os.path.splitext(x)[0])[1]
+ for x in glob.glob( os.path.join(self.options.path,'*.py') )
+ if not x.endswith("/__init__.py")
+ ]
self.modules += plugins
if self.options.user_module:
assert self.options.user_module in self.modules
def GetSlivers(self, config, plc):
"""Retrieves GetSlivers at PLC and triggers callbacks defined in modules/plugins"""
- try:
+ try:
logger.log("nodemanager: Syncing w/ PLC")
# retrieve GetSlivers from PLC
data = plc.GetSlivers()
logger.log_slivers(data)
logger.verbose("nodemanager: Sync w/ PLC done")
last_data=data
- except:
+ except:
logger.log_exc("nodemanager: failed in GetSlivers")
# XXX So some modules can at least boostrap.
logger.log("nodemanager: Can't contact PLC to GetSlivers(). Continuing.")
# Invoke GetSlivers() functions from the callback modules
for module in self.loaded_modules:
logger.verbose('nodemanager: triggering %s.GetSlivers'%module.__name__)
- try:
+ try:
callback = getattr(module, 'GetSlivers')
module_data=data
if getattr(module,'persistent_data',False):
module_data=last_data
callback(data, config, plc)
- except:
+ except SystemExit as e:
+ sys.exit(e)
+ except:
logger.log_exc("nodemanager: GetSlivers failed to run callback for module %r"%module)
"""
Get PLC wide defaults from _default system slice. Adds them to config class.
"""
- for slice in data.get('slivers'):
+ 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']
+ for attr in slice.get('attributes'): attr_dict[attr['tagname']] = attr['value']
if len(attr_dict):
logger.verbose("nodemanager: 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.
+ # 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
"""
# GetSlivers exposes the result of GetSliceFamily() as an separate key in data
# It is safe to override the attributes with this, as this method has the right logic
- for sliver in data.get('slivers'):
+ for sliver in data.get('slivers'):
try:
slicefamily=sliver.get('GetSliceFamily')
for att in sliver['attributes']:
- if att['tagname']=='vref':
+ if att['tagname']=='vref':
att['value']=slicefamily
continue
sliver['attributes'].append({ 'tagname':'vref','value':slicefamily})
except:
logger.log_exc("nodemanager: Could not overwrite 'vref' attribute from 'GetSliceFamily'",name=sliver['name'])
-
+
def dumpSlivers (self, slivers):
f = open(NodeManager.DB_FILE, "w")
logger.log ("nodemanager: saving successfully fetched GetSlivers in %s" % NodeManager.DB_FILE)
pickle.dump(slivers, f)
f.close()
-
+
def loadSlivers (self):
try:
f = open(NodeManager.DB_FILE, "r+")
except:
logger.log("Could not restore GetSlivers from %s" % NodeManager.DB_FILE)
return {}
-
+
def run(self):
+ # make sure to create /etc/planetlab/virt so others can read that
+ # used e.g. in vsys-scripts's sliceip
+ tools.get_node_virt()
try:
if self.options.daemon: tools.daemon()
-
+
# set log level
if (self.options.verbose):
logger.set_level(logger.LOG_VERBOSE)
-
+ tools.init_signals()
+
# Load /etc/planetlab/plc_config
config = Config(self.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)
+ 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. -- exiting""" % (other_pid, tools.PID_FILE)
return
except OSError, err:
print "Warning while writing PID file:", err
-
+
# load modules
self.loaded_modules = []
for module in self.modules:
try:
m = __import__(module)
logger.verbose("nodemanager: triggering %s.start"%m.__name__)
- m.start(self.options, config)
+ try: m.start()
+ except: logger.log("WARNING: module %s did not start")
self.loaded_modules.append(m)
- except ImportError, err:
- print "Warning while loading module %s:" % module, err
-
+ except:
+ if module not in NodeManager.core_modules:
+ logger.log_exc ("ERROR while loading module %s - skipped" % module)
+ else:
+ logger.log("FATAL : failed to start core module %s"%module)
+ sys.exit(1)
+
# sort on priority (lower first)
def sort_module_priority (m1,m2):
return getattr(m1,'priority',NodeManager.default_priority) - getattr(m2,'priority',NodeManager.default_priority)
self.loaded_modules.sort(sort_module_priority)
-
+
logger.log('ordered modules:')
- for module in self.loaded_modules:
+ for module in self.loaded_modules:
logger.log ('%s: %s'%(getattr(module,'priority',NodeManager.default_priority),module.__name__))
-
+
# Load /etc/planetlab/session
if os.path.exists(self.options.session):
session = file(self.options.session).read().strip()
else:
session = None
-
-
+
+
# get random periods
iperiod=int(self.options.period)
irandom=int(self.options.random)
-
+
# Initialize XML-RPC client
plc = PLCAPI(config.plc_api_uri, config.cacert, session, timeout=iperiod/2)
-
+
#check auth
logger.log("nodemanager: Checking Auth.")
while plc.check_authentication() != True:
logger.log("nodemanager: Retry Failed. (%r); Waiting.."%e)
time.sleep(iperiod)
logger.log("nodemanager: Authentication Succeeded!")
-
-
+
+
while True:
# Main nodemanager Loop
+ work_beg=time.time()
logger.log('nodemanager: mainloop - calling GetSlivers - period=%d random=%d'%(iperiod,irandom))
self.GetSlivers(config, plc)
delay=iperiod + random.randrange(0,irandom)
- logger.log('nodemanager: mainloop - sleeping for %d s'%delay)
+ work_end=time.time()
+ work_duration=int(work_end-work_beg)
+ logger.log('nodemanager: mainloop has worked for %s s - sleeping for %d s'%(work_duration,delay))
time.sleep(delay)
- except: logger.log_exc("nodemanager: failed in run")
+ except SystemExit:
+ pass
+ except:
+ logger.log_exc("nodemanager: failed in run")
def run():
logger.log("======================================== Entering nodemanager.py")
NodeManager().run()
-
+
if __name__ == '__main__':
run()
else:
- # This is for debugging purposes. Open a copy of Python and import nm
+ # This is for debugging purposes. Open a copy of Python and import nodemanager
tools.as_daemon_thread(run)
git://git.onelab.eu / nodemanager.git / blobdiff