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#!/usr/bin/env python
'''The XML-RPC Bcfg2 Server'''
__revision__ = '$Revision$'
import Bcfg2.Server.Plugins.Metadata
from Bcfg2.Server.Core import Core, CoreInitError
from xmlrpclib import Fault
from lxml.etree import XML, Element, tostring
import logging, select, socket, sys
import Bcfg2.Logger, Bcfg2.Options, Bcfg2.Component, Bcfg2.Daemon
logger = logging.getLogger('bcfg2-server')
def critical_error(operation):
'''Log and err, traceback and return an xmlrpc fault to client'''
logger.error(operation, exc_info=1)
raise Fault, (7, "Critical unexpected failure: %s" % (operation))
class SetupError(Exception):
'''Used when the server cant be setup'''
pass
class Bcfg2Serv(Bcfg2.Component.Component):
"""The Bcfg2 Server component providing XML-RPC access to Bcfg2 methods"""
__name__ = 'bcfg2'
__implementation__ = 'bcfg2'
fork_funcs = ['GetConfig', 'GetProbes']
request_queue_size = 15
def __init__(self, setup):
try:
self.Core = Core(setup['repo'], setup['plugins'],
setup['password'],
setup['vcs'], setup['encoding'], setup['filemonitor'])
except CoreInitError, msg:
logger.critical("Fatal error: %s" % (msg))
raise SystemExit, 1
if 'DBStats' in self.Core.plugins:
self.fork_funcs.append("RecvStats")
famfd = self.Core.fam.fileno()
events = False
while True:
try:
rsockinfo = select.select([famfd], [], [], 15)[0]
if not rsockinfo:
if events:
break
else:
logger.error("Hit event timeout without getting any events; GAMIN/FAM problem?")
continue
events = True
self.Core.Service()
except socket.error:
continue
try:
Bcfg2.Component.Component.__init__(self, setup['key'],
setup['password'],
setup['location'])
except Bcfg2.Component.ComponentInitError:
raise SetupError
self.funcs.update({
"AssertProfile" : self.Bcfg2AssertProfile,
"GetConfig" : self.Bcfg2GetConfig,
"GetProbes" : self.Bcfg2GetProbes,
"RecvProbeData" : self.Bcfg2RecvProbeData,
"RecvStats" : self.Bcfg2RecvStats,
"GetDecisionList" : self.Bcfg2GetDecisionList
})
# init functions to be exposed as XML-RPC functions
for plugin in self.Core.plugins.values():
for method in plugin.__rmi__:
self.register_function(getattr(self.Core.plugins[plugin.__name__], method),
"%s.%s" % (plugin.__name__, method))
def get_request(self):
'''We need to do work between requests, so select with timeout instead of blocking in accept'''
rsockinfo = []
famfd = self.Core.fam.fileno()
while self.socket not in rsockinfo:
self.clean_up_children()
if self.shut:
raise socket.error
try:
rsockinfo = select.select([self.socket, famfd], [], [], 15)[0]
except select.error:
continue
if famfd in rsockinfo:
self.Core.Service()
if self.socket in rsockinfo:
return self.socket.accept()
def Bcfg2GetProbes(self, address):
'''Fetch probes for a particular client'''
resp = Element('probes')
try:
name = self.Core.metadata.resolve_client(address)
meta = self.Core.build_metadata(name)
for plugin in [p for p in self.Core.plugins.values() \
if isinstance(p, Bcfg2.Server.Plugin.Probing)]:
for probe in plugin.GetProbes(meta):
resp.append(probe)
return tostring(resp, encoding='UTF-8', xml_declaration=True)
except Bcfg2.Server.Plugins.Metadata.MetadataConsistencyError:
warning = 'Client metadata resolution error for %s; check server log' % address[0]
self.logger.warning(warning)
raise Fault, (6, warning)
except:
critical_error("error determining client probes")
def Bcfg2RecvProbeData(self, address, probedata):
'''Receive probe data from clients'''
try:
name = self.Core.metadata.resolve_client(address)
meta = self.Core.build_metadata(name)
except Bcfg2.Server.Plugins.Metadata.MetadataConsistencyError:
warning = 'metadata consistency error'
self.logger.warning(warning)
raise Fault, (6, warning)
# clear dynamic groups
self.Core.metadata.cgroups[meta.hostname] = []
try:
xpdata = XML(probedata)
except:
self.logger.error("Failed to parse probe data from client %s" % (address[0]))
return False
sources = []
[sources.append(data.get('source')) for data in xpdata
if data.get('source') not in sources]
for source in sources:
if source not in self.Core.plugins:
self.logger.warning("Failed to locate plugin %s" % (source))
continue
dl = [data for data in xpdata if data.get('source') == source]
try:
self.Core.plugins[source].ReceiveData(meta, dl)
except:
self.logger.error("Failed to process probe data from client %s" % (address[0]), exc_info=1)
return True
def Bcfg2AssertProfile(self, address, profile):
'''Set profile for a client'''
try:
client = self.Core.metadata.resolve_client(address)
self.Core.metadata.set_profile(client, profile, address)
except (Bcfg2.Server.Plugins.Metadata.MetadataConsistencyError, Bcfg2.Server.Plugins.Metadata.MetadataRuntimeError):
warning = 'metadata consistency error'
self.logger.warning(warning)
raise Fault, (6, warning)
return True
def Bcfg2GetConfig(self, address, _=False, profile=False):
'''Build config for a client'''
try:
client = self.Core.metadata.resolve_client(address)
return tostring(self.Core.BuildConfiguration(client),
encoding='UTF-8', xml_declaration=True)
except Bcfg2.Server.Plugins.Metadata.MetadataConsistencyError:
self.logger.warning("Metadata consistency failure for %s" % (address))
raise Fault, (6, "Metadata consistency failure")
def Bcfg2RecvStats(self, address, stats):
'''Act on statistics upload'''
sdata = XML(stats)
client = self.Core.metadata.resolve_client(address)
self.Core.process_statistics(client, sdata)
return "<ok/>"
def _authenticate_connection(self, _, user, password, address):
return self.Core.metadata.AuthenticateConnection(user, password, address)
def Bcfg2GetDecisionList(self, address, mode):
client = self.Core.metadata.resolve_client(address)
meta = self.Core.build_metadata(client)
return self.Core.GetDecisions(meta, mode)
if __name__ == '__main__':
OPTINFO = {
'configfile': Bcfg2.Options.CFILE,
'daemon' : Bcfg2.Options.DAEMON,
'debug' : Bcfg2.Options.DEBUG,
'help' : Bcfg2.Options.HELP,
'verbose' : Bcfg2.Options.VERBOSE,
}
OPTINFO.update({'repo': Bcfg2.Options.SERVER_REPOSITORY,
'vcs': Bcfg2.Options.SERVER_VCS,
'plugins': Bcfg2.Options.SERVER_PLUGINS,
'password': Bcfg2.Options.SERVER_PASSWORD,
'filemonitor': Bcfg2.Options.SERVER_FILEMONITOR,
})
OPTINFO.update({'key' : Bcfg2.Options.SERVER_KEY,
'location' : Bcfg2.Options.SERVER_LOCATION,
'passwd' : Bcfg2.Options.SERVER_PASSWORD,
'static' : Bcfg2.Options.SERVER_STATIC,
'encoding' : Bcfg2.Options.ENCODING,
'filelog' : Bcfg2.Options.LOGGING_FILE_PATH,
})
setup = Bcfg2.Options.OptionParser(OPTINFO)
setup.parse(sys.argv[1:])
level = 0
if setup['daemon']:
Bcfg2.Logger.setup_logging('bcfg2-server', to_console=False, level=level, to_file=setup['filelog'])
Bcfg2.Daemon.daemonize(setup['daemon'])
else:
Bcfg2.Logger.setup_logging('bcfg2-server', level=level, to_file=setup['filelog'])
if not setup['key']:
print "No key specified in '%s'" % setup['configfile']
raise SystemExit, 1
try:
BSERV = Bcfg2Serv(setup)
except SetupError:
raise SystemExit, 1
while not BSERV.shut:
try:
BSERV.serve_forever()
except:
critical_error('error in service loop')
logger.info("Shutting down")
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