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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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Authors:
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* Brian Granger
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* MinRK
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2008-2011 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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from __future__ import with_statement
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import os
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import socket
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import stat
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import sys
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from multiprocessing import Process
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import zmq
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from zmq.devices import ProcessMonitoredQueue
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from zmq.log.handlers import PUBHandler
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from zmq.utils import jsonapi as json
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from IPython.core.profiledir import ProfileDir
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from IPython.parallel.apps.baseapp import (
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BaseParallelApplication,
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base_aliases,
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base_flags,
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)
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from IPython.utils.importstring import import_item
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from IPython.utils.traitlets import Instance, Unicode, Bool, List, Dict
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from IPython.zmq.session import (
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Session, session_aliases, session_flags, default_secure
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)
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from IPython.parallel.controller.heartmonitor import HeartMonitor
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from IPython.parallel.controller.hub import HubFactory
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from IPython.parallel.controller.scheduler import TaskScheduler,launch_scheduler
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from IPython.parallel.controller.sqlitedb import SQLiteDB
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from IPython.parallel.util import signal_children, split_url, asbytes
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# conditional import of MongoDB backend class
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try:
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from IPython.parallel.controller.mongodb import MongoDB
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except ImportError:
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maybe_mongo = []
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else:
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maybe_mongo = [MongoDB]
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#-----------------------------------------------------------------------------
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# Module level variables
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#-----------------------------------------------------------------------------
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#: The default config file name for this application
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default_config_file_name = u'ipcontroller_config.py'
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_description = """Start the IPython controller for parallel computing.
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The IPython controller provides a gateway between the IPython engines and
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clients. The controller needs to be started before the engines and can be
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configured using command line options or using a cluster directory. Cluster
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directories contain config, log and security files and are usually located in
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your ipython directory and named as "profile_name". See the `profile`
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and `profile-dir` options for details.
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"""
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_examples = """
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ipcontroller --ip=192.168.0.1 --port=1000 # listen on ip, port for engines
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ipcontroller --scheme=pure # use the pure zeromq scheduler
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"""
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#-----------------------------------------------------------------------------
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# The main application
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#-----------------------------------------------------------------------------
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flags = {}
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flags.update(base_flags)
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flags.update({
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'usethreads' : ( {'IPControllerApp' : {'use_threads' : True}},
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'Use threads instead of processes for the schedulers'),
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'sqlitedb' : ({'HubFactory' : {'db_class' : 'IPython.parallel.controller.sqlitedb.SQLiteDB'}},
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'use the SQLiteDB backend'),
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'mongodb' : ({'HubFactory' : {'db_class' : 'IPython.parallel.controller.mongodb.MongoDB'}},
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'use the MongoDB backend'),
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'dictdb' : ({'HubFactory' : {'db_class' : 'IPython.parallel.controller.dictdb.DictDB'}},
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'use the in-memory DictDB backend'),
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'reuse' : ({'IPControllerApp' : {'reuse_files' : True}},
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'reuse existing json connection files')
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})
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flags.update(session_flags)
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aliases = dict(
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ssh = 'IPControllerApp.ssh_server',
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enginessh = 'IPControllerApp.engine_ssh_server',
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location = 'IPControllerApp.location',
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url = 'HubFactory.url',
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ip = 'HubFactory.ip',
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transport = 'HubFactory.transport',
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port = 'HubFactory.regport',
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ping = 'HeartMonitor.period',
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scheme = 'TaskScheduler.scheme_name',
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hwm = 'TaskScheduler.hwm',
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)
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aliases.update(base_aliases)
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aliases.update(session_aliases)
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class IPControllerApp(BaseParallelApplication):
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name = u'ipcontroller'
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description = _description
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examples = _examples
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config_file_name = Unicode(default_config_file_name)
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classes = [ProfileDir, Session, HubFactory, TaskScheduler, HeartMonitor, SQLiteDB] + maybe_mongo
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# change default to True
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auto_create = Bool(True, config=True,
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help="""Whether to create profile dir if it doesn't exist.""")
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reuse_files = Bool(False, config=True,
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help='Whether to reuse existing json connection files.'
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)
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ssh_server = Unicode(u'', config=True,
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help="""ssh url for clients to use when connecting to the Controller
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processes. It should be of the form: [user@]server[:port]. The
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Controller's listening addresses must be accessible from the ssh server""",
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)
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engine_ssh_server = Unicode(u'', config=True,
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help="""ssh url for engines to use when connecting to the Controller
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processes. It should be of the form: [user@]server[:port]. The
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Controller's listening addresses must be accessible from the ssh server""",
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)
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location = Unicode(u'', config=True,
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help="""The external IP or domain name of the Controller, used for disambiguating
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engine and client connections.""",
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)
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import_statements = List([], config=True,
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help="import statements to be run at startup. Necessary in some environments"
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)
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use_threads = Bool(False, config=True,
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help='Use threads instead of processes for the schedulers',
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)
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engine_json_file = Unicode('ipcontroller-engine.json', config=True,
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help="JSON filename where engine connection info will be stored.")
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client_json_file = Unicode('ipcontroller-client.json', config=True,
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help="JSON filename where client connection info will be stored.")
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def _cluster_id_changed(self, name, old, new):
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super(IPControllerApp, self)._cluster_id_changed(name, old, new)
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self.engine_json_file = "%s-engine.json" % self.name
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self.client_json_file = "%s-client.json" % self.name
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# internal
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children = List()
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mq_class = Unicode('zmq.devices.ProcessMonitoredQueue')
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def _use_threads_changed(self, name, old, new):
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self.mq_class = 'zmq.devices.%sMonitoredQueue'%('Thread' if new else 'Process')
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aliases = Dict(aliases)
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flags = Dict(flags)
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def save_connection_dict(self, fname, cdict):
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"""save a connection dict to json file."""
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c = self.config
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url = cdict['url']
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location = cdict['location']
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if not location:
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try:
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proto,ip,port = split_url(url)
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except AssertionError:
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pass
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else:
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try:
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location = socket.gethostbyname_ex(socket.gethostname())[2][-1]
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except (socket.gaierror, IndexError):
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self.log.warn("Could not identify this machine's IP, assuming 127.0.0.1."
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" You may need to specify '--location=<external_ip_address>' to help"
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" IPython decide when to connect via loopback.")
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location = '127.0.0.1'
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cdict['location'] = location
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fname = os.path.join(self.profile_dir.security_dir, fname)
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with open(fname, 'wb') as f:
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f.write(json.dumps(cdict, indent=2))
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os.chmod(fname, stat.S_IRUSR|stat.S_IWUSR)
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def load_config_from_json(self):
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"""load config from existing json connector files."""
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c = self.config
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self.log.debug("loading config from JSON")
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# load from engine config
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with open(os.path.join(self.profile_dir.security_dir, self.engine_json_file)) as f:
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cfg = json.loads(f.read())
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key = c.Session.key = asbytes(cfg['exec_key'])
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xport,addr = cfg['url'].split('://')
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c.HubFactory.engine_transport = xport
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ip,ports = addr.split(':')
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c.HubFactory.engine_ip = ip
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c.HubFactory.regport = int(ports)
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self.location = cfg['location']
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if not self.engine_ssh_server:
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self.engine_ssh_server = cfg['ssh']
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# load client config
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with open(os.path.join(self.profile_dir.security_dir, self.client_json_file)) as f:
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cfg = json.loads(f.read())
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assert key == cfg['exec_key'], "exec_key mismatch between engine and client keys"
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xport,addr = cfg['url'].split('://')
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c.HubFactory.client_transport = xport
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ip,ports = addr.split(':')
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c.HubFactory.client_ip = ip
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if not self.ssh_server:
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self.ssh_server = cfg['ssh']
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assert int(ports) == c.HubFactory.regport, "regport mismatch"
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def load_secondary_config(self):
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"""secondary config, loading from JSON and setting defaults"""
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if self.reuse_files:
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try:
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self.load_config_from_json()
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except (AssertionError,IOError) as e:
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self.log.error("Could not load config from JSON: %s" % e)
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self.reuse_files=False
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# switch Session.key default to secure
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default_secure(self.config)
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self.log.debug("Config changed")
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self.log.debug(repr(self.config))
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def init_hub(self):
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c = self.config
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self.do_import_statements()
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try:
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self.factory = HubFactory(config=c, log=self.log)
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# self.start_logging()
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self.factory.init_hub()
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except:
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self.log.error("Couldn't construct the Controller", exc_info=True)
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self.exit(1)
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if not self.reuse_files:
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# save to new json config files
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f = self.factory
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cdict = {'exec_key' : f.session.key,
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'ssh' : self.ssh_server,
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'url' : "%s://%s:%s"%(f.client_transport, f.client_ip, f.regport),
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'location' : self.location
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}
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self.save_connection_dict(self.client_json_file, cdict)
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edict = cdict
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edict['url']="%s://%s:%s"%((f.client_transport, f.client_ip, f.regport))
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edict['ssh'] = self.engine_ssh_server
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self.save_connection_dict(self.engine_json_file, edict)
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#
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def init_schedulers(self):
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children = self.children
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mq = import_item(str(self.mq_class))
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hub = self.factory
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# maybe_inproc = 'inproc://monitor' if self.use_threads else self.monitor_url
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# IOPub relay (in a Process)
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q = mq(zmq.PUB, zmq.SUB, zmq.PUB, b'N/A',b'iopub')
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q.bind_in(hub.client_info['iopub'])
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q.bind_out(hub.engine_info['iopub'])
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q.setsockopt_out(zmq.SUBSCRIBE, b'')
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q.connect_mon(hub.monitor_url)
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q.daemon=True
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children.append(q)
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# Multiplexer Queue (in a Process)
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q = mq(zmq.ROUTER, zmq.ROUTER, zmq.PUB, b'in', b'out')
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q.bind_in(hub.client_info['mux'])
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q.setsockopt_in(zmq.IDENTITY, b'mux')
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q.bind_out(hub.engine_info['mux'])
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q.connect_mon(hub.monitor_url)
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q.daemon=True
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children.append(q)
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# Control Queue (in a Process)
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q = mq(zmq.ROUTER, zmq.ROUTER, zmq.PUB, b'incontrol', b'outcontrol')
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q.bind_in(hub.client_info['control'])
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q.setsockopt_in(zmq.IDENTITY, b'control')
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q.bind_out(hub.engine_info['control'])
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q.connect_mon(hub.monitor_url)
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q.daemon=True
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children.append(q)
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try:
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scheme = self.config.TaskScheduler.scheme_name
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except AttributeError:
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scheme = TaskScheduler.scheme_name.get_default_value()
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# Task Queue (in a Process)
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if scheme == 'pure':
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self.log.warn("task::using pure XREQ Task scheduler")
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q = mq(zmq.ROUTER, zmq.DEALER, zmq.PUB, b'intask', b'outtask')
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# q.setsockopt_out(zmq.HWM, hub.hwm)
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q.bind_in(hub.client_info['task'][1])
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q.setsockopt_in(zmq.IDENTITY, b'task')
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q.bind_out(hub.engine_info['task'])
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q.connect_mon(hub.monitor_url)
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q.daemon=True
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children.append(q)
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elif scheme == 'none':
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self.log.warn("task::using no Task scheduler")
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else:
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self.log.info("task::using Python %s Task scheduler"%scheme)
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sargs = (hub.client_info['task'][1], hub.engine_info['task'],
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hub.monitor_url, hub.client_info['notification'])
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kwargs = dict(logname='scheduler', loglevel=self.log_level,
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log_url = self.log_url, config=dict(self.config))
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if 'Process' in self.mq_class:
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# run the Python scheduler in a Process
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q = Process(target=launch_scheduler, args=sargs, kwargs=kwargs)
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q.daemon=True
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children.append(q)
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else:
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# single-threaded Controller
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kwargs['in_thread'] = True
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launch_scheduler(*sargs, **kwargs)
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def save_urls(self):
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"""save the registration urls to files."""
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c = self.config
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sec_dir = self.profile_dir.security_dir
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cf = self.factory
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with open(os.path.join(sec_dir, 'ipcontroller-engine.url'), 'w') as f:
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f.write("%s://%s:%s"%(cf.engine_transport, cf.engine_ip, cf.regport))
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with open(os.path.join(sec_dir, 'ipcontroller-client.url'), 'w') as f:
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f.write("%s://%s:%s"%(cf.client_transport, cf.client_ip, cf.regport))
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def do_import_statements(self):
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statements = self.import_statements
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for s in statements:
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try:
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self.log.msg("Executing statement: '%s'" % s)
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exec s in globals(), locals()
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except:
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self.log.msg("Error running statement: %s" % s)
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def forward_logging(self):
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if self.log_url:
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self.log.info("Forwarding logging to %s"%self.log_url)
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context = zmq.Context.instance()
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lsock = context.socket(zmq.PUB)
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lsock.connect(self.log_url)
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handler = PUBHandler(lsock)
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self.log.removeHandler(self._log_handler)
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handler.root_topic = 'controller'
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handler.setLevel(self.log_level)
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self.log.addHandler(handler)
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self._log_handler = handler
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def initialize(self, argv=None):
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super(IPControllerApp, self).initialize(argv)
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self.forward_logging()
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self.load_secondary_config()
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self.init_hub()
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self.init_schedulers()
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def start(self):
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# Start the subprocesses:
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self.factory.start()
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child_procs = []
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for child in self.children:
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child.start()
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if isinstance(child, ProcessMonitoredQueue):
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child_procs.append(child.launcher)
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elif isinstance(child, Process):
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child_procs.append(child)
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if child_procs:
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signal_children(child_procs)
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self.write_pid_file(overwrite=True)
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try:
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self.factory.loop.start()
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except KeyboardInterrupt:
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self.log.critical("Interrupted, Exiting...\n")
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def launch_new_instance():
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"""Create and run the IPython controller"""
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if sys.platform == 'win32':
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# make sure we don't get called from a multiprocessing subprocess
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# this can result in infinite Controllers being started on Windows
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# which doesn't have a proper fork, so multiprocessing is wonky
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# this only comes up when IPython has been installed using vanilla
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# setuptools, and *not* distribute.
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import multiprocessing
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p = multiprocessing.current_process()
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# the main process has name 'MainProcess'
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# subprocesses will have names like 'Process-1'
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if p.name != 'MainProcess':
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# we are a subprocess, don't start another Controller!
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return
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app = IPControllerApp.instance()
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app.initialize()
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app.start()
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if __name__ == '__main__':
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launch_new_instance()
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