improved logging + Hub,Engine,Scheduler are Configurable

IPython/zmq/log.py

@@ -21,7 +21,3 b' class EnginePUBHandler(PUBHandler):'
         else:
             return "engine"
     
-
-logger = logging.getLogger('ipzmq')
-logger.setLevel(logging.DEBUG)
-

IPython/zmq/parallel/client.py

@@ -90,11 +90,6 b' def defaultblock(f, self, *args, **kwargs):'
 # Classes
 #--------------------------------------------------------------------------
 
-class AbortedTask(object):
-    """A basic wrapper object describing an aborted task."""
-    def __init__(self, msg_id):
-        self.msg_id = msg_id
-
 class ResultDict(dict):
     """A subclass of dict that raises errors if it has them."""
     def __getitem__(self, key):
@@ -332,10 +327,10 b' class Client(object):'
         msg = ss.Message(msg)
         content = msg.content
         if content.status == 'ok':
-            if content.queue:
+            if content.mux:
                 self._mux_socket = self.context.socket(zmq.PAIR)
                 self._mux_socket.setsockopt(zmq.IDENTITY, self.session.session)
-                connect_socket(self._mux_socket, content.queue)
+                connect_socket(self._mux_socket, content.mux)
             if content.task:
                 self._task_socket = self.context.socket(zmq.PAIR)
                 self._task_socket.setsockopt(zmq.IDENTITY, self.session.session)

IPython/zmq/parallel/controller.py

@@ -17,6 +17,7 b' from __future__ import print_function'
 
 import os
 import time
+import logging
 from multiprocessing import Process
 
 import zmq
@@ -29,7 +30,8 b' from IPython.zmq.entry_point import bind_port'
 
 from hub import Hub
 from entry_point import (make_base_argument_parser, select_random_ports, split_ports,
-                        connect_logger, parse_url, signal_children, generate_exec_key)
+                        connect_logger, parse_url, signal_children, generate_exec_key,
+                        local_logger)
 
 
 import streamsession as session
@@ -118,8 +120,6 b' def main(argv=None):'
     ctx = zmq.Context()
     loop = ioloop.IOLoop.instance()
     
-    # setup logging
-    connect_logger(ctx, iface%args.logport, root="controller", loglevel=args.loglevel)
     
     # Registrar socket
     reg = ZMQStream(ctx.socket(zmq.XREP), loop)
@@ -207,7 +207,9 b' def main(argv=None):'
         q.start()
         children.append(q.launcher)
     else:
-        sargs = (iface%task[0],iface%task[1],iface%monport,iface%nport,args.scheduler)
+        log_addr = iface%args.logport if args.logport else None
+        sargs = (iface%task[0], iface%task[1], iface%monport, iface%nport,
+                    log_addr, args.loglevel, args.scheduler)
         print (sargs)
         q = Process(target=launch_scheduler, args=sargs)
         q.daemon=True
@@ -224,7 +226,7 b' def main(argv=None):'
     # build connection dicts
     engine_addrs = {
         'control' : iface%control[1],
-        'queue': iface%mux[1],
+        'mux': iface%mux[1],
         'heartbeat': (iface%hb[0], iface%hb[1]),
         'task' : iface%task[1],
         'iopub' : iface%iopub[1],
@@ -234,15 +236,24 b' def main(argv=None):'
     client_addrs = {
         'control' : iface%control[0],
         'query': iface%cport,
-        'queue': iface%mux[0],
+        'mux': iface%mux[0],
         'task' : iface%task[0],
         'iopub' : iface%iopub[0],
         'notification': iface%nport
         }
     
+    # setup logging
+    if args.logport:
+        connect_logger(ctx, iface%args.logport, root="controller", loglevel=args.loglevel)
+    else:
+        local_logger(args.loglevel)
+        
     # register relay of signals to the children
     signal_children(children)
-    hub = Hub(loop, thesession, sub, reg, hmon, c, n, db, engine_addrs, client_addrs)
+    hub = Hub(loop=loop, session=thesession, monitor=sub, heartmonitor=hmon,
+                registrar=reg, clientele=c, notifier=n, db=db,
+                engine_addrs=engine_addrs, client_addrs=client_addrs)
+    
     dc = ioloop.DelayedCallback(lambda : print("Controller started..."), 100, loop)
     dc.start()
     loop.start()

IPython/zmq/parallel/engine.py

@@ -8,49 +8,48 b' import sys'
 import time
 import traceback
 import uuid
+import logging
 from pprint import pprint
 
 import zmq
 from zmq.eventloop import ioloop, zmqstream
 
-from IPython.utils.traitlets import HasTraits
-from IPython.utils.localinterfaces import LOCALHOST 
+# internal
+from IPython.config.configurable import Configurable
+from IPython.utils.traitlets import Instance, Str, Dict
+# from IPython.utils.localinterfaces import LOCALHOST 
 
 from streamsession import Message, StreamSession
-from client import Client
 from streamkernel import Kernel, make_kernel
 import heartmonitor
-from entry_point import make_base_argument_parser, connect_logger, parse_url
+from entry_point import (make_base_argument_parser, connect_engine_logger, parse_url,
+                        local_logger)
 # import taskthread
-# from log import logger
-
+logger = logging.getLogger()
 
 def printer(*msg):
-    pprint(msg, stream=sys.__stdout__)
+    # print (logger.handlers, file=sys.__stdout__)
+    logger.info(str(msg))
 
-class Engine(object):
+class Engine(Configurable):
     """IPython engine"""
     
-    id=None
-    context=None
-    loop=None
-    session=None
-    ident=None
-    registrar=None
-    heart=None
     kernel=None
-    user_ns=None
-    
-    def __init__(self, context, loop, session, registrar, client=None, ident=None,
-        heart_id=None, user_ns=None):
-        self.context = context
-        self.loop = loop
-        self.session = session
-        self.registrar = registrar
-        self.client = client
-        self.ident = ident if ident else str(uuid.uuid4())
+    id=None
+    
+    # configurables:
+    context=Instance(zmq.Context)
+    loop=Instance(ioloop.IOLoop)
+    session=Instance(StreamSession)
+    ident=Str()
+    registrar=Instance(zmqstream.ZMQStream)
+    user_ns=Dict()
+    
+    def __init__(self, **kwargs):
+        super(Engine, self).__init__(**kwargs)
+        if not self.ident:
+            self.ident =  str(uuid.uuid4())
         self.registrar.on_send(printer)
-        self.user_ns = user_ns
         
     def register(self):
         
@@ -64,8 +63,9 b' class Engine(object):'
         idents,msg = self.session.feed_identities(msg)
         msg = Message(self.session.unpack_message(msg))
         if msg.content.status == 'ok':
-            self.session.username = str(msg.content.id)
-            queue_addr = msg.content.queue
+            self.id = int(msg.content.id)
+            self.session.username = 'engine-%i'%self.id
+            queue_addr = msg.content.mux
             shell_addrs = [str(queue_addr)]
             control_addr = str(msg.content.control)
             task_addr = msg.content.task
@@ -75,7 +75,7 b' class Engine(object):'
             
             hb_addrs = msg.content.heartbeat
             # ioloop.DelayedCallback(self.heart.start, 1000, self.loop).start()
-            k = make_kernel(self.ident, control_addr, shell_addrs, iopub_addr,
+            k = make_kernel(self.id, self.ident, control_addr, shell_addrs, iopub_addr,
                             hb_addrs, client_addr=None, loop=self.loop,
                             context=self.context, key=self.session.key)[-1]
             self.kernel = k
@@ -84,12 +84,12 b' class Engine(object):'
                 self.kernel.user_ns = self.user_ns
             
         else:
-            # logger.error("Registration Failed: %s"%msg)
+            logger.error("Registration Failed: %s"%msg)
             raise Exception("Registration Failed: %s"%msg)
         
-        # logger.info("engine::completed registration with id %s"%self.session.username)
+        logger.info("completed registration with id %i"%self.id)
         
-        print (msg,file=sys.__stdout__)
+        # logger.info(str(msg))
     
     def unregister(self):
         self.session.send(self.registrar, "unregistration_request", content=dict(id=int(self.session.username)))
@@ -97,7 +97,7 b' class Engine(object):'
         sys.exit(0)
     
     def start(self):
-        print ("registering",file=sys.__stdout__)
+        logger.info("registering")
         self.register()
 
         
@@ -118,7 +118,6 b' def main(argv=None, user_ns=None):'
     ctx = zmq.Context()
 
     # setup logging
-    connect_logger(ctx, iface%args.logport, root="engine", loglevel=args.loglevel)
     
     reg_conn = iface % args.regport
     print (reg_conn, file=sys.__stdout__)
@@ -127,10 +126,16 b' def main(argv=None, user_ns=None):'
     reg = ctx.socket(zmq.PAIR)
     reg.connect(reg_conn)
     reg = zmqstream.ZMQStream(reg, loop)
-    client = None
     
-    e = Engine(ctx, loop, session, reg, client, args.ident, user_ns=user_ns)
-    dc = ioloop.DelayedCallback(e.start, 100, loop)
+    e = Engine(context=ctx, loop=loop, session=session, registrar=reg, 
+            ident=args.ident or '', user_ns=user_ns)
+    if args.logport:
+        print ("connecting logger to %s"%(iface%args.logport), file=sys.__stdout__)
+        connect_engine_logger(ctx, iface%args.logport, e, loglevel=args.loglevel)
+    else:
+        local_logger(args.loglevel)
+    
+    dc = ioloop.DelayedCallback(e.start, 0, loop)
     dc.start()
     loop.start()
 

IPython/zmq/parallel/entry_point.py

@@ -22,7 +22,7 b' from zmq.log import handlers'
 # Local imports.
 from IPython.core.ultratb import FormattedTB
 from IPython.external.argparse import ArgumentParser
-from IPython.zmq.log import logger
+from IPython.zmq.log import EnginePUBHandler
 
 def split_ports(s, n):
     """Parser helper for multiport strings"""
@@ -82,6 +82,7 b' def make_base_argument_parser():'
     """ Creates an ArgumentParser for the generic arguments supported by all 
     ipcluster entry points.
     """
+    
     parser = ArgumentParser()
     parser.add_argument('--ip', type=str, default='127.0.0.1',
                         help='set the controller\'s IP address [default: local]')
@@ -89,10 +90,10 b' def make_base_argument_parser():'
                         help='set the transport to use [default: tcp]')
     parser.add_argument('--regport', type=int, metavar='PORT', default=10101,
                         help='set the XREP port for registration [default: 10101]')
-    parser.add_argument('--logport', type=int, metavar='PORT', default=20202,
-                        help='set the PUB port for logging [default: 10201]')
-    parser.add_argument('--loglevel', type=str, metavar='LEVEL', default=logging.DEBUG,
-                        help='set the log level [default: DEBUG]')
+    parser.add_argument('--logport', type=int, metavar='PORT', default=0,
+                        help='set the PUB port for remote logging [default: log to stdout]')
+    parser.add_argument('--loglevel', type=str, metavar='LEVEL', default=logging.INFO,
+                        help='set the log level [default: INFO]')
     parser.add_argument('--ident', type=str,
                         help='set the ZMQ identity [default: random]')
     parser.add_argument('--packer', type=str, default='json',
@@ -105,17 +106,42 b' def make_base_argument_parser():'
 
     return parser
 
-
-def connect_logger(context, iface, root="ip", loglevel=logging.DEBUG):
+def integer_loglevel(loglevel):
     try:
         loglevel = int(loglevel)
     except ValueError:
         if isinstance(loglevel, str):
             loglevel = getattr(logging, loglevel)
+    return loglevel
+
+def connect_logger(context, iface, root="ip", loglevel=logging.DEBUG):
+    loglevel = integer_loglevel(loglevel)
     lsock = context.socket(zmq.PUB)
     lsock.connect(iface)
     handler = handlers.PUBHandler(lsock)
     handler.setLevel(loglevel)
     handler.root_topic = root
+    logger = logging.getLogger()
+    logger.addHandler(handler)
+    logger.setLevel(loglevel)
+
+def connect_engine_logger(context, iface, engine, loglevel=logging.DEBUG):
+    logger = logging.getLogger()
+    loglevel = integer_loglevel(loglevel)
+    lsock = context.socket(zmq.PUB)
+    lsock.connect(iface)
+    handler = EnginePUBHandler(engine, lsock)
+    handler.setLevel(loglevel)
     logger.addHandler(handler)
+    logger.setLevel(loglevel)
     
+def local_logger(loglevel=logging.DEBUG):
+    loglevel = integer_loglevel(loglevel)
+    logger = logging.getLogger()
+    if logger.handlers:
+        # if there are any handlers, skip the hookup
+        return
+    handler = logging.StreamHandler()
+    handler.setLevel(loglevel)
+    logger.addHandler(handler)
+    logger.setLevel(loglevel)

IPython/zmq/parallel/heartmonitor.py

@@ -7,13 +7,13 b' and hearts are tracked based on their XREQ identities.'
 from __future__ import print_function
 import time
 import uuid
+import logging
 
 import zmq
 from zmq.devices import ProcessDevice,ThreadDevice
 from zmq.eventloop import ioloop, zmqstream
 
-#internal
-from IPython.zmq.log import logger
+logger = logging.getLogger()
 
 class Heart(object):
     """A basic heart object for responding to a HeartMonitor.
@@ -53,6 +53,7 b' class HeartMonitor(object):'
     hearts=None
     on_probation=None
     last_ping=None
+    # debug=False
     
     def __init__(self, loop, pingstream, pongstream, period=1000):
         self.loop = loop
@@ -85,19 +86,6 b' class HeartMonitor(object):'
         logger.debug("heartbeat::new heart failure handler: %s"%handler)
         self._failure_handlers.add(handler)
     
-    # def _flush(self):
-    #     """override IOLoop triggers"""
-    #     while True:
-    #         try:
-    #             msg = self.pongstream.socket.recv_multipart(zmq.NOBLOCK)
-    #             logger.warn("IOLoop triggered beat with incoming heartbeat waiting to be handled")
-    #         except zmq.ZMQError:
-    #             return
-    #         else:
-    #             self.handle_pong(msg)
-    #         # print '.'
-    #             
-            
     def beat(self):
         self.pongstream.flush() 
         self.last_ping = self.lifetime
@@ -105,7 +93,7 b' class HeartMonitor(object):'
         toc = time.time()
         self.lifetime += toc-self.tic
         self.tic = toc
-        logger.debug("heartbeat::%s"%self.lifetime)
+        # logger.debug("heartbeat::%s"%self.lifetime)
         goodhearts = self.hearts.intersection(self.responses)
         missed_beats = self.hearts.difference(goodhearts)
         heartfailures = self.on_probation.intersection(missed_beats)
@@ -144,7 +132,7 b' class HeartMonitor(object):'
         "a heart just beat"
         if msg[1] == str(self.lifetime):
             delta = time.time()-self.tic
-            logger.debug("heartbeat::heart %r took %.2f ms to respond"%(msg[0], 1000*delta))
+            # logger.debug("heartbeat::heart %r took %.2f ms to respond"%(msg[0], 1000*delta))
             self.responses.add(msg[0])
         elif msg[1] == str(self.last_ping):
             delta = time.time()-self.tic + (self.lifetime-self.last_ping)

IPython/zmq/parallel/hub.py

@@ -18,14 +18,19 b' from __future__ import print_function'
 import sys
 from datetime import datetime
 import time
+import logging
 
 import zmq
-from zmq.eventloop import ioloop
+from zmq.eventloop import ioloop, zmqstream
 
 # internal:
-from IPython.zmq.log import logger # a Logger object
+from IPython.config.configurable import Configurable
+from IPython.utils.traitlets import HasTraits, Instance, Int, Str, Dict
+# from IPython.zmq.log import logger # a Logger object
 
 from streamsession import Message, wrap_exception, ISO8601
+from heartmonitor import HeartMonitor
+from util import validate_url_container
 
 try:
     from pymongo.binary import Binary
@@ -38,6 +43,8 b' else:'
 # Code
 #-----------------------------------------------------------------------------
 
+logger = logging.getLogger()
+
 def _passer(*args, **kwargs):
     return
 
@@ -46,7 +53,7 b' def _printer(*args, **kwargs):'
     print (kwargs)
 
 def init_record(msg):
-    """return an empty TaskRecord dict, with all keys initialized with None."""
+    """Initialize a TaskRecord based on a request."""
     header = msg['header']
     return {
         'msg_id' : header['msg_id'],
@@ -71,7 +78,7 b' def init_record(msg):'
     }
 
 
-class EngineConnector(object):
+class EngineConnector(HasTraits):
     """A simple object for accessing the various zmq connections of an object.
     Attributes are:
     id (int): engine ID
@@ -80,22 +87,18 b' class EngineConnector(object):'
     registration (str): identity of registration XREQ socket
     heartbeat (str): identity of heartbeat XREQ socket
     """
-    id=0
-    queue=None
-    control=None
-    registration=None
-    heartbeat=None
-    pending=None
-    
-    def __init__(self, id, queue, registration, control, heartbeat=None):
-        logger.info("engine::Engine Connected: %i"%id)
-        self.id = id
-        self.queue = queue
-        self.registration = registration
-        self.control = control
-        self.heartbeat = heartbeat
-        
-class Hub(object):
+    id=Int(0)
+    queue=Str()
+    control=Str()
+    registration=Str()
+    heartbeat=Str()
+    pending=Instance(set)
+    
+    def __init__(self, **kwargs):
+        super(EngineConnector, self).__init__(**kwargs)
+        logger.info("engine::Engine Connected: %i"%self.id)
+        
+class Hub(Configurable):
     """The IPython Controller Hub with 0MQ connections
     
     Parameters
@@ -123,26 +126,25 b' class Hub(object):'
     clients=None
     hearts=None
     pending=None
-    results=None
     tasks=None
     completed=None
-    mia=None
+    # mia=None
     incoming_registrations=None
     registration_timeout=None
     
     #objects from constructor:
-    loop=None
-    registrar=None
-    clientelle=None
-    queue=None
-    heartbeat=None
-    notifier=None
-    db=None
-    client_addr=None
-    engine_addrs=None
-    
-    
-    def __init__(self, loop, session, queue, registrar, heartbeat, clientele, notifier, db, engine_addrs, client_addrs):
+    loop=Instance(ioloop.IOLoop)
+    registrar=Instance(zmqstream.ZMQStream)
+    clientele=Instance(zmqstream.ZMQStream)
+    monitor=Instance(zmqstream.ZMQStream)
+    heartmonitor=Instance(HeartMonitor)
+    notifier=Instance(zmqstream.ZMQStream)
+    db=Instance(object)
+    client_addrs=Dict()
+    engine_addrs=Dict()
+    
+    
+    def __init__(self, **kwargs):
         """
         # universal:
         loop: IOLoop for creating future connections
@@ -158,6 +160,8 b' class Hub(object):'
         engine_addrs: zmq address/protocol dict for engine connections
         client_addrs: zmq address/protocol dict for client connections
         """
+        
+        super(Hub, self).__init__(**kwargs)
         self.ids = set()
         self.keytable={}
         self.incoming_registrations={}
@@ -166,35 +170,44 b' class Hub(object):'
         self.clients = {}
         self.hearts = {}
         # self.mia = set()
-        
+        self.registration_timeout = max(5000, 2*self.heartmonitor.period)
+        # this is the stuff that will move to DB:
+        self.pending = set() # pending messages, keyed by msg_id
+        self.queues = {} # pending msg_ids keyed by engine_id
+        self.tasks = {} # pending msg_ids submitted as tasks, keyed by client_id
+        self.completed = {} # completed msg_ids keyed by engine_id
+        self.all_completed = set()
+        self._idcounter = 0
         # self.sockets = {}
-        self.loop = loop
-        self.session = session
-        self.registrar = registrar
-        self.clientele = clientele
-        self.queue = queue
-        self.heartbeat = heartbeat
-        self.notifier = notifier
-        self.db = db
+        # self.loop = loop
+        # self.session = session
+        # self.registrar = registrar
+        # self.clientele = clientele
+        # self.queue = queue
+        # self.heartmonitor = heartbeat
+        # self.notifier = notifier
+        # self.db = db
         
         # validate connection dicts:
-        self.client_addrs = client_addrs
-        assert isinstance(client_addrs['queue'], str)
-        assert isinstance(client_addrs['control'], str)
+        # self.client_addrs = client_addrs
+        validate_url_container(self.client_addrs)
+        
+        # assert isinstance(self.client_addrs['queue'], str)
+        # assert isinstance(self.client_addrs['control'], str)
         # self.hb_addrs = hb_addrs
-        self.engine_addrs = engine_addrs
-        assert isinstance(engine_addrs['queue'], str)
-        assert isinstance(client_addrs['control'], str)
-        assert len(engine_addrs['heartbeat']) == 2
+        validate_url_container(self.engine_addrs)
+        # self.engine_addrs = engine_addrs
+        # assert isinstance(self.engine_addrs['queue'], str)
+        # assert isinstance(self.engine_addrs['control'], str)
+        # assert len(engine_addrs['heartbeat']) == 2
         
         # register our callbacks
         self.registrar.on_recv(self.dispatch_register_request)
         self.clientele.on_recv(self.dispatch_client_msg)
-        self.queue.on_recv(self.dispatch_monitor_traffic)
+        self.monitor.on_recv(self.dispatch_monitor_traffic)
         
-        if heartbeat is not None:
-            heartbeat.add_heart_failure_handler(self.handle_heart_failure)
-            heartbeat.add_new_heart_handler(self.handle_new_heart)
+        self.heartmonitor.add_heart_failure_handler(self.handle_heart_failure)
+        self.heartmonitor.add_new_heart_handler(self.handle_new_heart)
         
         self.monitor_handlers = { 'in' : self.save_queue_request,
                                 'out': self.save_queue_result,
@@ -218,25 +231,21 b' class Hub(object):'
                                 'unregistration_request' : self.unregister_engine,
                                 'connection_request': self.connection_request,
         }
-        self.registration_timeout = max(5000, 2*self.heartbeat.period)
-        # this is the stuff that will move to DB:
-        # self.results = {} # completed results
-        self.pending = set() # pending messages, keyed by msg_id
-        self.queues = {} # pending msg_ids keyed by engine_id
-        self.tasks = {} # pending msg_ids submitted as tasks, keyed by client_id
-        self.completed = {} # completed msg_ids keyed by engine_id
-        self.all_completed = set()
         
         logger.info("controller::created controller")
     
-    def _new_id(self):
+    @property
+    def _next_id(self):
         """gemerate a new ID"""
-        newid = 0
-        incoming = [id[0] for id in self.incoming_registrations.itervalues()]
-        # print newid, self.ids, self.incoming_registrations
-        while newid in self.ids or newid in incoming:
-            newid += 1
+        newid = self._idcounter
+        self._idcounter += 1
         return newid
+        # newid = 0
+        # incoming = [id[0] for id in self.incoming_registrations.itervalues()]
+        # # print newid, self.ids, self.incoming_registrations
+        # while newid in self.ids or newid in incoming:
+        #     newid += 1
+        # return newid
     
     #-----------------------------------------------------------------------------
     # message validation
@@ -580,6 +589,9 b' class Hub(object):'
             return
         
         parent = msg['parent_header']
+        if not parent:
+            logger.error("iopub::invalid IOPub message: %s"%msg)
+            return
         msg_id = parent['msg_id']
         msg_type = msg['msg_type']
         content = msg['content']
@@ -631,7 +643,7 b' class Hub(object):'
             return
         heart = content.get('heartbeat', None)
         """register a new engine, and create the socket(s) necessary"""
-        eid = self._new_id()
+        eid = self._next_id
         # print (eid, queue, reg, heart)
         
         logger.debug("registration::register_engine(%i, %r, %r, %r)"%(eid, queue, reg, heart))
@@ -644,10 +656,12 b' class Hub(object):'
                 raise KeyError("queue_id %r in use"%queue)
             except:
                 content = wrap_exception()
+                logger.error("queue_id %r in use"%queue, exc_info=True)
         elif heart in self.hearts: # need to check unique hearts?
             try:
                 raise KeyError("heart_id %r in use"%heart)
             except:
+                logger.error("heart_id %r in use"%heart, exc_info=True)
                 content = wrap_exception()
         else:
             for h, pack in self.incoming_registrations.iteritems():
@@ -655,12 +669,14 b' class Hub(object):'
                     try:
                         raise KeyError("heart_id %r in use"%heart)
                     except:
+                        logger.error("heart_id %r in use"%heart, exc_info=True)
                         content = wrap_exception()
                     break
                 elif queue == pack[1]:
                     try:
                         raise KeyError("queue_id %r in use"%queue)
                     except:
+                        logger.error("queue_id %r in use"%queue, exc_info=True)
                         content = wrap_exception()
                     break
         
@@ -669,15 +685,15 b' class Hub(object):'
                 ident=reg)
         
         if content['status'] == 'ok':
-            if heart in self.heartbeat.hearts:
+            if heart in self.heartmonitor.hearts:
                 # already beating
-                self.incoming_registrations[heart] = (eid,queue,reg,None)
+                self.incoming_registrations[heart] = (eid,queue,reg[0],None)
                 self.finish_registration(heart)
             else:
                 purge = lambda : self._purge_stalled_registration(heart)
                 dc = ioloop.DelayedCallback(purge, self.registration_timeout, self.loop)
                 dc.start()
-                self.incoming_registrations[heart] = (eid,queue,reg,dc)
+                self.incoming_registrations[heart] = (eid,queue,reg[0],dc)
         else:
             logger.error("registration::registration %i failed: %s"%(eid, content['evalue']))
         return eid
@@ -718,7 +734,8 b' class Hub(object):'
         control = queue
         self.ids.add(eid)
         self.keytable[eid] = queue
-        self.engines[eid] = EngineConnector(eid, queue, reg, control, heart)
+        self.engines[eid] = EngineConnector(id=eid, queue=queue, registration=reg, 
+                                    control=control, heartbeat=heart)
         self.by_ident[queue] = eid
         self.queues[eid] = list()
         self.tasks[eid] = list()

IPython/zmq/parallel/scheduler.py

@@ -11,6 +11,8 b' Python Scheduler exists.'
 
 from __future__ import print_function
 from random import randint,random
+import logging
+from types import FunctionType
 
 try:
     import numpy
@@ -21,17 +23,22 b' import zmq'
 from zmq.eventloop import ioloop, zmqstream
 
 # local imports
-from IPython.zmq.log import logger # a Logger object
+from IPython.external.decorator import decorator
+from IPython.config.configurable import Configurable
+from IPython.utils.traitlets import Instance
+
 from client import Client
 from dependency import Dependency
 import streamsession as ss
+from entry_point import connect_logger, local_logger
 
-from IPython.external.decorator import decorator
+
+logger = logging.getLogger()
 
 @decorator
 def logged(f,self,*args,**kwargs):
     # print ("#--------------------")
-    # print ("%s(*%s,**%s)"%(f.func_name, args, kwargs))
+    logger.debug("scheduler::%s(*%s,**%s)"%(f.func_name, args, kwargs))
     # print ("#--")
     return f(self,*args, **kwargs)
 
@@ -99,7 +106,7 b' def leastload(loads):'
 #---------------------------------------------------------------------
 # Classes
 #---------------------------------------------------------------------
-class TaskScheduler(object):
+class TaskScheduler(Configurable):
     """Python TaskScheduler object.
     
     This is the simplest object that supports msg_id based
@@ -108,10 +115,15 b' class TaskScheduler(object):'
     
     """
     
-    scheme = leastload # function for determining the destination
-    client_stream = None # client-facing stream
-    engine_stream = None # engine-facing stream
-    mon_stream = None # controller-facing stream
+    # configurables:
+    scheme = Instance(FunctionType, default=leastload) # function for determining the destination
+    client_stream = Instance(zmqstream.ZMQStream) # client-facing stream
+    engine_stream = Instance(zmqstream.ZMQStream) # engine-facing stream
+    notifier_stream = Instance(zmqstream.ZMQStream) # hub-facing sub stream
+    mon_stream = Instance(zmqstream.ZMQStream) # hub-facing pub stream
+    io_loop = Instance(ioloop.IOLoop)
+    
+    # internals:
     dependencies = None # dict by msg_id of [ msg_ids that depend on key ]
     depending = None # dict by msg_id of (msg_id, raw_msg, after, follow)
     pending = None # dict by engine_uuid of submitted tasks
@@ -123,23 +135,10 b' class TaskScheduler(object):'
     blacklist = None # dict by msg_id of locations where a job has encountered UnmetDependency
     
     
-    def __init__(self, client_stream, engine_stream, mon_stream, 
-                notifier_stream, scheme=None, io_loop=None):
-        if io_loop is None:
-            io_loop = ioloop.IOLoop.instance()
-        self.io_loop = io_loop
-        self.client_stream = client_stream
-        self.engine_stream = engine_stream
-        self.mon_stream = mon_stream
-        self.notifier_stream = notifier_stream
-        
-        if scheme is not None:
-            self.scheme = scheme
-        else:
-            self.scheme = TaskScheduler.scheme
+    def __init__(self, **kwargs):
+        super(TaskScheduler, self).__init__(**kwargs)
         
         self.session = ss.StreamSession(username="TaskScheduler")
-        
         self.dependencies = {}
         self.depending = {}
         self.completed = {}
@@ -150,12 +149,13 b' class TaskScheduler(object):'
         self.targets = []
         self.loads = []
         
-        engine_stream.on_recv(self.dispatch_result, copy=False)
+        self.engine_stream.on_recv(self.dispatch_result, copy=False)
         self._notification_handlers = dict(
             registration_notification = self._register_engine,
             unregistration_notification = self._unregister_engine
         )
         self.notifier_stream.on_recv(self.dispatch_notification)
+        logger.info("Scheduler started...%r"%self)
     
     def resume_receiving(self):
         """Resume accepting jobs."""
@@ -183,6 +183,7 b' class TaskScheduler(object):'
                 handler(str(msg['content']['queue']))
             except KeyError:
                 logger.error("task::Invalid notification msg: %s"%msg)
+    
     @logged
     def _register_engine(self, uid):
         """New engine with ident `uid` became available."""
@@ -306,7 +307,8 b' class TaskScheduler(object):'
         self.add_job(idx)
         self.pending[target][msg_id] = (msg, follow)
         content = dict(msg_id=msg_id, engine_id=target)
-        self.session.send(self.mon_stream, 'task_destination', content=content, ident='tracktask')
+        self.session.send(self.mon_stream, 'task_destination', content=content, 
+                        ident=['tracktask',self.session.session])
     
     #-----------------------------------------------------------------------
     # Result Handling
@@ -395,7 +397,7 b' class TaskScheduler(object):'
     
 
 
-def launch_scheduler(in_addr, out_addr, mon_addr, not_addr, scheme='weighted'):
+def launch_scheduler(in_addr, out_addr, mon_addr, not_addr, log_addr=None, loglevel=logging.DEBUG, scheme='weighted'):
     from zmq.eventloop import ioloop
     from zmq.eventloop.zmqstream import ZMQStream
     
@@ -414,7 +416,15 b" def launch_scheduler(in_addr, out_addr, mon_addr, not_addr, scheme='weighted'):"
     nots.setsockopt(zmq.SUBSCRIBE, '')
     nots.connect(not_addr)
     
-    scheduler = TaskScheduler(ins,outs,mons,nots,scheme,loop)
+    # setup logging
+    if log_addr:
+        connect_logger(ctx, log_addr, root="scheduler", loglevel=loglevel)
+    else:
+        local_logger(loglevel)
+    
+    scheduler = TaskScheduler(client_stream=ins, engine_stream=outs,
+                            mon_stream=mons,notifier_stream=nots,
+                            scheme=scheme,io_loop=loop)
     
     loop.start()
 

IPython/zmq/parallel/streamkernel.py

@@ -15,6 +15,7 b' import os'
 import sys
 import time
 import traceback
+import logging
 from datetime import datetime
 from signal import SIGTERM, SIGKILL
 from pprint import pprint
@@ -25,9 +26,8 b' from zmq.eventloop import ioloop, zmqstream'
 
 # Local imports.
 from IPython.core import ultratb
-from IPython.utils.traitlets import HasTraits, Instance, List
+from IPython.utils.traitlets import HasTraits, Instance, List, Int
 from IPython.zmq.completer import KernelCompleter
-from IPython.zmq.log import logger # a Logger object
 from IPython.zmq.iostream import OutStream
 from IPython.zmq.displayhook import DisplayHook
 
@@ -38,6 +38,8 b' from dependency import UnmetDependency'
 import heartmonitor
 from client import Client
 
+logger = logging.getLogger()
+
 def printer(*args):
     pprint(args, stream=sys.__stdout__)
 
@@ -51,8 +53,9 b' class Kernel(HasTraits):'
     # Kernel interface
     #---------------------------------------------------------------------------
 
+    id = Int(-1)
     session = Instance(StreamSession)
-    shell_streams = Instance(list)
+    shell_streams = List()
     control_stream = Instance(zmqstream.ZMQStream)
     task_stream = Instance(zmqstream.ZMQStream)
     iopub_stream = Instance(zmqstream.ZMQStream)
@@ -62,7 +65,8 b' class Kernel(HasTraits):'
     def __init__(self, **kwargs):
         super(Kernel, self).__init__(**kwargs)
         self.identity = self.shell_streams[0].getsockopt(zmq.IDENTITY)
-        self.prefix = 'engine.%s'%self.identity
+        self.prefix = 'engine.%s'%self.id
+        logger.root_topic = self.prefix
         self.user_ns = {}
         self.history = []
         self.compiler = CommandCompiler()
@@ -108,8 +112,8 b' class Kernel(HasTraits):'
                 
                 # assert self.reply_socketly_socket.rcvmore(), "Unexpected missing message part."
                 # msg = self.reply_socket.recv_json()
-            print ("Aborting:", file=sys.__stdout__)
-            print (Message(msg), file=sys.__stdout__)
+            logger.info("Aborting:")
+            logger.info(str(msg))
             msg_type = msg['msg_type']
             reply_type = msg_type.split('_')[0] + '_reply'
             # reply_msg = self.session.msg(reply_type, {'status' : 'aborted'}, msg)
@@ -117,7 +121,7 b' class Kernel(HasTraits):'
             # self.reply_socket.send_json(reply_msg)
             reply_msg = self.session.send(stream, reply_type, 
                         content={'status' : 'aborted'}, parent=msg, ident=idents)[0]
-            print(Message(reply_msg), file=sys.__stdout__)
+            logger.debug(str(reply_msg))
             # We need to wait a bit for requests to come in. This can probably
             # be set shorter for true asynchronous clients.
             time.sleep(0.05)
@@ -135,7 +139,7 b' class Kernel(HasTraits):'
         content = dict(status='ok')
         reply_msg = self.session.send(stream, 'abort_reply', content=content, 
                 parent=parent, ident=ident)[0]
-        print(Message(reply_msg), file=sys.__stdout__)
+        logger(Message(reply_msg), file=sys.__stdout__)
     
     def shutdown_request(self, stream, ident, parent):
         """kill ourself.  This should really be handled in an external process"""
@@ -168,7 +172,7 b' class Kernel(HasTraits):'
         
         handler = self.control_handlers.get(msg['msg_type'], None)
         if handler is None:
-            print ("UNKNOWN CONTROL MESSAGE TYPE:", msg, file=sys.__stderr__)
+            logger.error("UNKNOWN CONTROL MESSAGE TYPE: %r"%msg['msg_type'])
         else:
             handler(self.control_stream, idents, msg)
     
@@ -211,13 +215,12 b' class Kernel(HasTraits):'
         try:
             code = parent[u'content'][u'code']
         except:
-            print("Got bad msg: ", file=sys.__stderr__)
-            print(Message(parent), file=sys.__stderr__)
+            logger.error("Got bad msg: %s"%parent, exc_info=True)
             return
         # pyin_msg = self.session.msg(u'pyin',{u'code':code}, parent=parent)
         # self.iopub_stream.send(pyin_msg)
         self.session.send(self.iopub_stream, u'pyin', {u'code':code},parent=parent,
-                            ident=self.identity+'.pyin')
+                            ident='%s.pyin'%self.prefix)
         started = datetime.now().strftime(ISO8601)
         try:
             comp_code = self.compiler(code, '<zmq-kernel>')
@@ -231,7 +234,7 b' class Kernel(HasTraits):'
             exc_content = self._wrap_exception('execute')
             # exc_msg = self.session.msg(u'pyerr', exc_content, parent)
             self.session.send(self.iopub_stream, u'pyerr', exc_content, parent=parent,
-                            ident=self.identity+'.pyerr')
+                            ident='%s.pyerr'%self.prefix)
             reply_content = exc_content
         else:
             reply_content = {'status' : 'ok'}
@@ -240,7 +243,7 b' class Kernel(HasTraits):'
         # self.reply_socket.send_json(reply_msg)
         reply_msg = self.session.send(stream, u'execute_reply', reply_content, parent=parent, 
                     ident=ident, subheader = dict(started=started))
-        print(Message(reply_msg), file=sys.__stdout__)
+        logger.debug(str(reply_msg))
         if reply_msg['content']['status'] == u'error':
             self.abort_queues()
 
@@ -262,8 +265,7 b' class Kernel(HasTraits):'
             msg_id = parent['header']['msg_id']
             bound = content.get('bound', False)
         except:
-            print("Got bad msg: ", file=sys.__stderr__)
-            print(Message(parent), file=sys.__stderr__)
+            logger.error("Got bad msg: %s"%parent, exc_info=True)
             return
         # pyin_msg = self.session.msg(u'pyin',{u'code':code}, parent=parent)
         # self.iopub_stream.send(pyin_msg)
@@ -316,7 +318,7 b' class Kernel(HasTraits):'
             exc_content = self._wrap_exception('apply')
             # exc_msg = self.session.msg(u'pyerr', exc_content, parent)
             self.session.send(self.iopub_stream, u'pyerr', exc_content, parent=parent,
-                                ident=self.identity+'.pyerr')
+                                ident='%s.pyerr'%self.prefix)
             reply_content = exc_content
             result_buf = []
             
@@ -354,7 +356,7 b' class Kernel(HasTraits):'
             return
         handler = self.shell_handlers.get(msg['msg_type'], None)
         if handler is None:
-            print ("UNKNOWN MESSAGE TYPE:", msg, file=sys.__stderr__)
+            logger.error("UNKNOWN MESSAGE TYPE: %r"%msg['msg_type'])
         else:
             handler(stream, idents, msg)
     
@@ -398,7 +400,7 b' class Kernel(HasTraits):'
         #         # don't busywait
         #         time.sleep(1e-3)
 
-def make_kernel(identity, control_addr, shell_addrs, iopub_addr, hb_addrs, 
+def make_kernel(int_id, identity, control_addr, shell_addrs, iopub_addr, hb_addrs, 
                 client_addr=None, loop=None, context=None, key=None,
                 out_stream_factory=OutStream, display_hook_factory=DisplayHook):
     
@@ -410,7 +412,7 b' def make_kernel(identity, control_addr, shell_addrs, iopub_addr, hb_addrs,'
     c = context
     session = StreamSession(key=key)
     # print (session.key)
-    print (control_addr, shell_addrs, iopub_addr, hb_addrs)
+    # print (control_addr, shell_addrs, iopub_addr, hb_addrs)
     
     # create Control Stream
     control_stream = zmqstream.ZMQStream(c.socket(zmq.PAIR), loop)
@@ -433,12 +435,12 b' def make_kernel(identity, control_addr, shell_addrs, iopub_addr, hb_addrs,'
     # Redirect input streams and set a display hook.
     if out_stream_factory:
         sys.stdout = out_stream_factory(session, iopub_stream, u'stdout')
-        sys.stdout.topic = identity+'.stdout'
+        sys.stdout.topic = 'engine.%i.stdout'%int_id
         sys.stderr = out_stream_factory(session, iopub_stream, u'stderr')
-        sys.stderr.topic = identity+'.stderr'
+        sys.stderr.topic = 'engine.%i.stderr'%int_id
     if display_hook_factory:
         sys.displayhook = display_hook_factory(session, iopub_stream)
-        sys.displayhook.topic = identity+'.pyout'
+        sys.displayhook.topic = 'engine.%i.pyout'%int_id
     
     
     # launch heartbeat
@@ -451,7 +453,7 b' def make_kernel(identity, control_addr, shell_addrs, iopub_addr, hb_addrs,'
     else:
         client = None
     
-    kernel = Kernel(session=session, control_stream=control_stream, 
+    kernel = Kernel(id=int_id, session=session, control_stream=control_stream, 
             shell_streams=shell_streams, iopub_stream=iopub_stream, 
             client=client, loop=loop)
     kernel.start()

IPython/zmq/parallel/util.py

@@ -1,4 +1,5 b''
 """some generic utilities"""
+import re
 
 class ReverseDict(dict):
     """simple double-keyed subset of dict methods."""
@@ -33,3 +34,46 b' class ReverseDict(dict):'
             return default
     
 
+def validate_url(url):
+    """validate a url for zeromq"""
+    if not isinstance(url, basestring):
+        raise TypeError("url must be a string, not %r"%type(url))
+    url = url.lower()
+    
+    proto_addr = url.split('://')
+    assert len(proto_addr) == 2, 'Invalid url: %r'%url
+    proto, addr = proto_addr
+    assert proto in ['tcp','pgm','epgm','ipc','inproc'], "Invalid protocol: %r"%proto
+    
+    # domain pattern adapted from http://www.regexlib.com/REDetails.aspx?regexp_id=391
+    # author: Remi Sabourin
+    pat = re.compile(r'^([\w\d]([\w\d\-]{0,61}[\w\d])?\.)*[\w\d]([\w\d\-]{0,61}[\w\d])?$')
+    
+    if proto == 'tcp':
+        lis = addr.split(':')
+        assert len(lis) == 2, 'Invalid url: %r'%url
+        addr,s_port = lis
+        try:
+            port = int(s_port)
+        except ValueError:
+            raise AssertionError("Invalid port %r in url: %r"%(port, url))
+        
+        assert pat.match(addr) is not None, 'Invalid url: %r'%url
+        
+    else:
+        # only validate tcp urls currently
+        pass
+    
+    return True
+
+
+def validate_url_container(container):
+    """validate a potentially nested collection of urls."""
+    if isinstance(container, basestring):
+        url = container
+        return validate_url(url)
+    elif isinstance(container, dict):
+        container = container.itervalues()
+    
+    for element in container:
+        validate_url_container(element)
  No newline at end of file

examples/zmqontroller/logwatcher.py

@@ -19,6 +19,7 b''
 #    You should have received a copy of the Lesser GNU General Public License
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+import sys
 import zmq
 logport = 20202
 def main(topics, addrs):
@@ -26,20 +27,27 b' def main(topics, addrs):'
     context = zmq.Context()
     socket = context.socket(zmq.SUB)
     for topic in topics:
+        print "Subscribing to: %r"%topic
         socket.setsockopt(zmq.SUBSCRIBE, topic)
     if addrs:
         for addr in addrs:
             print "Connecting to: ", addr
             socket.connect(addr)
     else:
-        socket.bind('tcp://127.0.0.1:%i'%logport)
+        socket.bind('tcp://*:%i'%logport)
 
     while True:
         # topic = socket.recv()
         # print topic
-        topic, msg = socket.recv_multipart()
-        # msg = socket.recv_pyobj()
+        # print 'tic'
+        raw = socket.recv_multipart()
+        if len(raw) != 2:
+            print "!!! invalid log message: %s"%raw
+        else:
+            topic, msg = raw
+            # don't newline, since log messages always newline:
         print "%s | %s " % (topic, msg),
+            sys.stdout.flush()
 
 if __name__ == '__main__':
     import sys