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#!/usr/bin/env python
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# encoding: utf-8
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"""
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The IPython controller application
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2008-2009 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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import os
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import sys
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from twisted.application import service
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from twisted.internet import reactor
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from twisted.python import log
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from IPython.core.application import Application
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from IPython.kernel.clusterdir import ApplicationWithClusterDir
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from IPython.kernel.engineconnector import EngineConnector
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from IPython.kernel.engineservice import EngineService
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from IPython.kernel.fcutil import Tub
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from IPython.utils.importstring import import_item
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#-----------------------------------------------------------------------------
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# The main application
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#-----------------------------------------------------------------------------
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cl_args = (
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# Controller config
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(('--furl-file',), dict(
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type=unicode, dest='Global.furl_file',
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help='The full location of the file containing the FURL of the '
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'controller. If this is not given, the FURL file must be in the '
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'security directory of the cluster directory. This location is '
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'resolved using the --profile and --app-dir options.',
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metavar='Global.furl_file')
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),
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# MPI
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(('--mpi',), dict(
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type=str, dest='MPI.use',
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help='How to enable MPI (mpi4py, pytrilinos, or empty string to disable).',
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metavar='MPI.use')
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),
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# Global config
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(('--log-to-file',), dict(
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action='store_true', dest='Global.log_to_file',
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help='Log to a file in the log directory (default is stdout)')
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)
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)
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mpi4py_init = """from mpi4py import MPI as mpi
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mpi.size = mpi.COMM_WORLD.Get_size()
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mpi.rank = mpi.COMM_WORLD.Get_rank()
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"""
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pytrilinos_init = """from PyTrilinos import Epetra
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class SimpleStruct:
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pass
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mpi = SimpleStruct()
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mpi.rank = 0
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mpi.size = 0
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"""
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default_config_file_name = u'ipengine_config.py'
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_description = """Start an IPython engine for parallel computing.\n\n
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IPython engines run in parallel and perform computations on behalf of a client
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and controller. A controller needs to be started before the engines. The
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engine can be configured using command line options or using a cluster
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directory. Cluster directories contain config, log and security files and are
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usually located in your .ipython directory and named as "cluster_<profile>".
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See the --profile and --cluster-dir options for details.
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"""
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class IPEngineApp(ApplicationWithClusterDir):
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name = u'ipengine'
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description = _description
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config_file_name = default_config_file_name
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auto_create_cluster_dir = True
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cl_arguments = Application.cl_arguments + cl_args
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def create_default_config(self):
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super(IPEngineApp, self).create_default_config()
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# The engine should not clean logs as we don't want to remove the
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# active log files of other running engines.
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self.default_config.Global.clean_logs = False
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# Global config attributes
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self.default_config.Global.exec_lines = []
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self.default_config.Global.shell_class = 'IPython.kernel.core.interpreter.Interpreter'
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# Configuration related to the controller
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# This must match the filename (path not included) that the controller
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# used for the FURL file.
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self.default_config.Global.furl_file_name = u'ipcontroller-engine.furl'
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# If given, this is the actual location of the controller's FURL file.
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# If not, this is computed using the profile, app_dir and furl_file_name
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self.default_config.Global.furl_file = u''
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# The max number of connection attemps and the initial delay between
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# those attemps.
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self.default_config.Global.connect_delay = 0.1
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self.default_config.Global.connect_max_tries = 15
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# MPI related config attributes
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self.default_config.MPI.use = ''
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self.default_config.MPI.mpi4py = mpi4py_init
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self.default_config.MPI.pytrilinos = pytrilinos_init
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def post_load_command_line_config(self):
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pass
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def pre_construct(self):
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super(IPEngineApp, self).pre_construct()
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self.find_cont_furl_file()
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def find_cont_furl_file(self):
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"""Set the furl file.
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Here we don't try to actually see if it exists for is valid as that
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is hadled by the connection logic.
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"""
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config = self.master_config
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# Find the actual controller FURL file
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if not config.Global.furl_file:
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try_this = os.path.join(
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config.Global.cluster_dir,
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config.Global.security_dir,
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config.Global.furl_file_name
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)
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config.Global.furl_file = try_this
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def construct(self):
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# This is the working dir by now.
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sys.path.insert(0, '')
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self.start_mpi()
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self.start_logging()
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# Create the underlying shell class and EngineService
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shell_class = import_item(self.master_config.Global.shell_class)
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self.engine_service = EngineService(shell_class, mpi=mpi)
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self.exec_lines()
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# Create the service hierarchy
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self.main_service = service.MultiService()
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self.engine_service.setServiceParent(self.main_service)
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self.tub_service = Tub()
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self.tub_service.setServiceParent(self.main_service)
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# This needs to be called before the connection is initiated
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self.main_service.startService()
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# This initiates the connection to the controller and calls
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# register_engine to tell the controller we are ready to do work
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self.engine_connector = EngineConnector(self.tub_service)
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log.msg("Using furl file: %s" % self.master_config.Global.furl_file)
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reactor.callWhenRunning(self.call_connect)
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def call_connect(self):
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d = self.engine_connector.connect_to_controller(
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self.engine_service,
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self.master_config.Global.furl_file,
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self.master_config.Global.connect_delay,
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self.master_config.Global.connect_max_tries
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)
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def handle_error(f):
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log.msg('Error connecting to controller. This usually means that '
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'i) the controller was not started, ii) a firewall was blocking '
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'the engine from connecting to the controller or iii) the engine '
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' was not pointed at the right FURL file:')
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log.msg(f.getErrorMessage())
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reactor.callLater(0.1, reactor.stop)
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d.addErrback(handle_error)
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def start_mpi(self):
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global mpi
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mpikey = self.master_config.MPI.use
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mpi_import_statement = self.master_config.MPI.get(mpikey, None)
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if mpi_import_statement is not None:
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try:
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self.log.info("Initializing MPI:")
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self.log.info(mpi_import_statement)
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exec mpi_import_statement in globals()
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except:
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mpi = None
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else:
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mpi = None
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def exec_lines(self):
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for line in self.master_config.Global.exec_lines:
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try:
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log.msg("Executing statement: '%s'" % line)
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self.engine_service.execute(line)
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except:
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log.msg("Error executing statement: %s" % line)
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def start_app(self):
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reactor.run()
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def launch_new_instance():
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"""Create and run the IPython controller"""
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app = IPEngineApp()
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app.start()
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if __name__ == '__main__':
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launch_new_instance()
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