#!/usr/bin/env python # encoding: utf-8 """ The IPython engine application Authors: * Brian Granger * MinRK """ #----------------------------------------------------------------------------- # Copyright (C) 2008-2011 The IPython Development Team # # Distributed under the terms of the BSD License. The full license is in # the file COPYING, distributed as part of this software. #----------------------------------------------------------------------------- #----------------------------------------------------------------------------- # Imports #----------------------------------------------------------------------------- import json import os import sys import time import zmq from zmq.eventloop import ioloop from IPython.core.profiledir import ProfileDir from IPython.parallel.apps.baseapp import ( BaseParallelApplication, base_aliases, base_flags, catch_config_error, ) from IPython.zmq.log import EnginePUBHandler from IPython.zmq.session import ( Session, session_aliases, session_flags ) from IPython.config.configurable import Configurable from IPython.parallel.engine.engine import EngineFactory from IPython.parallel.engine.streamkernel import Kernel from IPython.parallel.util import disambiguate_url, asbytes from IPython.utils.importstring import import_item from IPython.utils.traitlets import Bool, Unicode, Dict, List, Float #----------------------------------------------------------------------------- # Module level variables #----------------------------------------------------------------------------- #: The default config file name for this application default_config_file_name = u'ipengine_config.py' _description = """Start an IPython engine for parallel computing. IPython engines run in parallel and perform computations on behalf of a client and controller. A controller needs to be started before the engines. The engine can be configured using command line options or using a cluster directory. Cluster directories contain config, log and security files and are usually located in your ipython directory and named as "profile_name". See the `profile` and `profile-dir` options for details. """ _examples = """ ipengine --ip=192.168.0.1 --port=1000 # connect to hub at ip and port ipengine --log-to-file --log-level=DEBUG # log to a file with DEBUG verbosity """ #----------------------------------------------------------------------------- # MPI configuration #----------------------------------------------------------------------------- mpi4py_init = """from mpi4py import MPI as mpi mpi.size = mpi.COMM_WORLD.Get_size() mpi.rank = mpi.COMM_WORLD.Get_rank() """ pytrilinos_init = """from PyTrilinos import Epetra class SimpleStruct: pass mpi = SimpleStruct() mpi.rank = 0 mpi.size = 0 """ class MPI(Configurable): """Configurable for MPI initialization""" use = Unicode('', config=True, help='How to enable MPI (mpi4py, pytrilinos, or empty string to disable).' ) def _use_changed(self, name, old, new): # load default init script if it's not set if not self.init_script: self.init_script = self.default_inits.get(new, '') init_script = Unicode('', config=True, help="Initialization code for MPI") default_inits = Dict({'mpi4py' : mpi4py_init, 'pytrilinos':pytrilinos_init}, config=True) #----------------------------------------------------------------------------- # Main application #----------------------------------------------------------------------------- aliases = dict( file = 'IPEngineApp.url_file', c = 'IPEngineApp.startup_command', s = 'IPEngineApp.startup_script', url = 'EngineFactory.url', ssh = 'EngineFactory.sshserver', sshkey = 'EngineFactory.sshkey', ip = 'EngineFactory.ip', transport = 'EngineFactory.transport', port = 'EngineFactory.regport', location = 'EngineFactory.location', timeout = 'EngineFactory.timeout', mpi = 'MPI.use', ) aliases.update(base_aliases) aliases.update(session_aliases) flags = {} flags.update(base_flags) flags.update(session_flags) class IPEngineApp(BaseParallelApplication): name = 'ipengine' description = _description examples = _examples config_file_name = Unicode(default_config_file_name) classes = List([ProfileDir, Session, EngineFactory, Kernel, MPI]) startup_script = Unicode(u'', config=True, help='specify a script to be run at startup') startup_command = Unicode('', config=True, help='specify a command to be run at startup') url_file = Unicode(u'', config=True, help="""The full location of the file containing the connection information for the controller. If this is not given, the file must be in the security directory of the cluster directory. This location is resolved using the `profile` or `profile_dir` options.""", ) wait_for_url_file = Float(5, config=True, help="""The maximum number of seconds to wait for url_file to exist. This is useful for batch-systems and shared-filesystems where the controller and engine are started at the same time and it may take a moment for the controller to write the connector files.""") url_file_name = Unicode(u'ipcontroller-engine.json', config=True) def _cluster_id_changed(self, name, old, new): if new: base = 'ipcontroller-%s' % new else: base = 'ipcontroller' self.url_file_name = "%s-engine.json" % base log_url = Unicode('', config=True, help="""The URL for the iploggerapp instance, for forwarding logging to a central location.""") aliases = Dict(aliases) flags = Dict(flags) def find_url_file(self): """Set the url file. Here we don't try to actually see if it exists for is valid as that is hadled by the connection logic. """ config = self.config # Find the actual controller key file if not self.url_file: self.url_file = os.path.join( self.profile_dir.security_dir, self.url_file_name ) def load_connector_file(self): """load config from a JSON connector file, at a *lower* priority than command-line/config files. """ self.log.info("Loading url_file %r", self.url_file) config = self.config with open(self.url_file) as f: d = json.loads(f.read()) if 'exec_key' in d: config.Session.key = asbytes(d['exec_key']) try: config.EngineFactory.location except AttributeError: config.EngineFactory.location = d['location'] d['url'] = disambiguate_url(d['url'], config.EngineFactory.location) try: config.EngineFactory.url except AttributeError: config.EngineFactory.url = d['url'] try: config.EngineFactory.sshserver except AttributeError: config.EngineFactory.sshserver = d['ssh'] def init_engine(self): # This is the working dir by now. sys.path.insert(0, '') config = self.config # print config self.find_url_file() # was the url manually specified? keys = set(self.config.EngineFactory.keys()) keys = keys.union(set(self.config.RegistrationFactory.keys())) if keys.intersection(set(['ip', 'url', 'port'])): # Connection info was specified, don't wait for the file url_specified = True self.wait_for_url_file = 0 else: url_specified = False if self.wait_for_url_file and not os.path.exists(self.url_file): self.log.warn("url_file %r not found", self.url_file) self.log.warn("Waiting up to %.1f seconds for it to arrive.", self.wait_for_url_file) tic = time.time() while not os.path.exists(self.url_file) and (time.time()-tic < self.wait_for_url_file): # wait for url_file to exist, or until time limit time.sleep(0.1) if os.path.exists(self.url_file): self.load_connector_file() elif not url_specified: self.log.fatal("Fatal: url file never arrived: %s", self.url_file) self.exit(1) try: exec_lines = config.Kernel.exec_lines except AttributeError: config.Kernel.exec_lines = [] exec_lines = config.Kernel.exec_lines if self.startup_script: enc = sys.getfilesystemencoding() or 'utf8' cmd="execfile(%r)" % self.startup_script.encode(enc) exec_lines.append(cmd) if self.startup_command: exec_lines.append(self.startup_command) # Create the underlying shell class and Engine # shell_class = import_item(self.master_config.Global.shell_class) # print self.config try: self.engine = EngineFactory(config=config, log=self.log) except: self.log.error("Couldn't start the Engine", exc_info=True) self.exit(1) def forward_logging(self): if self.log_url: self.log.info("Forwarding logging to %s", self.log_url) context = self.engine.context lsock = context.socket(zmq.PUB) lsock.connect(self.log_url) self.log.removeHandler(self._log_handler) handler = EnginePUBHandler(self.engine, lsock) handler.setLevel(self.log_level) self.log.addHandler(handler) self._log_handler = handler def init_mpi(self): global mpi self.mpi = MPI(config=self.config) mpi_import_statement = self.mpi.init_script if mpi_import_statement: try: self.log.info("Initializing MPI:") self.log.info(mpi_import_statement) exec mpi_import_statement in globals() except: mpi = None else: mpi = None @catch_config_error def initialize(self, argv=None): super(IPEngineApp, self).initialize(argv) self.init_mpi() self.init_engine() self.forward_logging() def start(self): self.engine.start() try: self.engine.loop.start() except KeyboardInterrupt: self.log.critical("Engine Interrupted, shutting down...\n") def launch_new_instance(): """Create and run the IPython engine""" app = IPEngineApp.instance() app.initialize() app.start() if __name__ == '__main__': launch_new_instance()