src/tashi/clustermanager/clustermanager.py

#!/usr/bin/env python

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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
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# 
#   http://www.apache.org/licenses/LICENSE-2.0
# 
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import os
import sys
import time
import logging.config

from tashi.util import boolean, instantiateImplementation, getConfig, debugConsole
import tashi

from tashi.rpycservices import rpycservices
from rpyc.utils.server import ThreadedServer
from rpyc.utils.authenticators import TlsliteVdbAuthenticator

log = None

def startClusterManager(config):
	global service, data
	
	dfs = instantiateImplementation(config.get("ClusterManager", "dfs"), config)
	data = instantiateImplementation(config.get("ClusterManager", "data"), config)
	service = instantiateImplementation(config.get("ClusterManager", "service"), config, data, dfs)

	if boolean(config.get("Security", "authAndEncrypt")):
		users = {}
		userDatabase = data.getUsers()
		for user in userDatabase.values():
			if user.passwd != None:
				users[user.name] = user.passwd
		users[config.get('AllowedUsers', 'nodeManagerUser')] = config.get('AllowedUsers', 'nodeManagerPassword')
		users[config.get('AllowedUsers', 'agentUser')] = config.get('AllowedUsers', 'agentPassword')
		authenticator = TlsliteVdbAuthenticator.from_dict(users)
		t = ThreadedServer(service=rpycservices.ManagerService, hostname='0.0.0.0', port=int(config.get('ClusterManagerService', 'port')), auto_register=False, authenticator=authenticator)
	else:
		t = ThreadedServer(service=rpycservices.ManagerService, hostname='0.0.0.0', port=int(config.get('ClusterManagerService', 'port')), auto_register=False)
	t.logger.setLevel(logging.ERROR)
	t.service.service = service
	t.service._type = 'ClusterManagerService'

	debugConsole(globals())

	t.start()
	# shouldn't exit by itself
	return

def main():
	global log
	
	# setup configuration and logging
	(config, configFiles) = getConfig(["ClusterManager"])
	publisher = instantiateImplementation(config.get("ClusterManager", "publisher"), config)
	tashi.publisher = publisher
	logging.config.fileConfig(configFiles)
	log = logging.getLogger(__file__)
	log.info('Using configuration file(s) %s' % configFiles)
	
	# bind the database
	log.info('Starting cluster manager')

	# handle keyboard interrupts (http://code.activestate.com/recipes/496735-workaround-for-missed-sigint-in-multithreaded-prog/)
	child = os.fork()

	if child == 0:
		startClusterManager(config)
		# shouldn't exit by itself
		sys.exit(0)

	else:
		# main
		try:
			os.waitpid(child, 0)
		except KeyboardInterrupt:
			log.info("Exiting cluster manager after receiving a SIGINT signal")
			os._exit(0)
		except Exception:
			log.exception("Abnormal termination of cluster manager")
			os._exit(-1)

		log.info("Exiting cluster manager after service thread exited")
		os._exit(-1)

	return



if __name__ == "__main__":
	main()