|
|
"""A simple engine that talks to a controller over 0MQ.
|
|
|
it handles registration, etc. and launches a kernel
|
|
|
connected to the Controller's Schedulers.
|
|
|
|
|
|
Authors:
|
|
|
|
|
|
* Min RK
|
|
|
"""
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2010-2011 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.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
from __future__ import print_function
|
|
|
|
|
|
import sys
|
|
|
import time
|
|
|
from getpass import getpass
|
|
|
|
|
|
import zmq
|
|
|
from zmq.eventloop import ioloop, zmqstream
|
|
|
|
|
|
from IPython.external.ssh import tunnel
|
|
|
# internal
|
|
|
from IPython.utils.localinterfaces import LOCALHOST
|
|
|
from IPython.utils.traitlets import (
|
|
|
Instance, Dict, Integer, Type, Float, Integer, Unicode, CBytes, Bool
|
|
|
)
|
|
|
from IPython.utils.py3compat import cast_bytes
|
|
|
|
|
|
from IPython.parallel.controller.heartmonitor import Heart
|
|
|
from IPython.parallel.factory import RegistrationFactory
|
|
|
from IPython.parallel.util import disambiguate_url
|
|
|
|
|
|
from IPython.kernel.zmq.session import Message
|
|
|
from IPython.kernel.zmq.ipkernel import Kernel
|
|
|
from IPython.kernel.zmq.kernelapp import IPKernelApp
|
|
|
|
|
|
class EngineFactory(RegistrationFactory):
|
|
|
"""IPython engine"""
|
|
|
|
|
|
# configurables:
|
|
|
out_stream_factory=Type('IPython.kernel.zmq.iostream.OutStream', config=True,
|
|
|
help="""The OutStream for handling stdout/err.
|
|
|
Typically 'IPython.kernel.zmq.iostream.OutStream'""")
|
|
|
display_hook_factory=Type('IPython.kernel.zmq.displayhook.ZMQDisplayHook', config=True,
|
|
|
help="""The class for handling displayhook.
|
|
|
Typically 'IPython.kernel.zmq.displayhook.ZMQDisplayHook'""")
|
|
|
location=Unicode(config=True,
|
|
|
help="""The location (an IP address) of the controller. This is
|
|
|
used for disambiguating URLs, to determine whether
|
|
|
loopback should be used to connect or the public address.""")
|
|
|
timeout=Float(5.0, config=True,
|
|
|
help="""The time (in seconds) to wait for the Controller to respond
|
|
|
to registration requests before giving up.""")
|
|
|
max_heartbeat_misses=Integer(50, config=True,
|
|
|
help="""The maximum number of times a check for the heartbeat ping of a
|
|
|
controller can be missed before shutting down the engine.
|
|
|
|
|
|
If set to 0, the check is disabled.""")
|
|
|
sshserver=Unicode(config=True,
|
|
|
help="""The SSH server to use for tunneling connections to the Controller.""")
|
|
|
sshkey=Unicode(config=True,
|
|
|
help="""The SSH private key file to use when tunneling connections to the Controller.""")
|
|
|
paramiko=Bool(sys.platform == 'win32', config=True,
|
|
|
help="""Whether to use paramiko instead of openssh for tunnels.""")
|
|
|
|
|
|
|
|
|
# not configurable:
|
|
|
connection_info = Dict()
|
|
|
user_ns = Dict()
|
|
|
id = Integer(allow_none=True)
|
|
|
registrar = Instance('zmq.eventloop.zmqstream.ZMQStream')
|
|
|
kernel = Instance(Kernel)
|
|
|
hb_check_period=Integer()
|
|
|
|
|
|
# States for the heartbeat monitoring
|
|
|
# Initial values for monitored and pinged must satisfy "monitored > pinged == False" so that
|
|
|
# during the first check no "missed" ping is reported. Must be floats for Python 3 compatibility.
|
|
|
_hb_last_pinged = 0.0
|
|
|
_hb_last_monitored = 0.0
|
|
|
_hb_missed_beats = 0
|
|
|
# The zmq Stream which receives the pings from the Heart
|
|
|
_hb_listener = None
|
|
|
|
|
|
bident = CBytes()
|
|
|
ident = Unicode()
|
|
|
def _ident_changed(self, name, old, new):
|
|
|
self.bident = cast_bytes(new)
|
|
|
using_ssh=Bool(False)
|
|
|
|
|
|
|
|
|
def __init__(self, **kwargs):
|
|
|
super(EngineFactory, self).__init__(**kwargs)
|
|
|
self.ident = self.session.session
|
|
|
|
|
|
def init_connector(self):
|
|
|
"""construct connection function, which handles tunnels."""
|
|
|
self.using_ssh = bool(self.sshkey or self.sshserver)
|
|
|
|
|
|
if self.sshkey and not self.sshserver:
|
|
|
# We are using ssh directly to the controller, tunneling localhost to localhost
|
|
|
self.sshserver = self.url.split('://')[1].split(':')[0]
|
|
|
|
|
|
if self.using_ssh:
|
|
|
if tunnel.try_passwordless_ssh(self.sshserver, self.sshkey, self.paramiko):
|
|
|
password=False
|
|
|
else:
|
|
|
password = getpass("SSH Password for %s: "%self.sshserver)
|
|
|
else:
|
|
|
password = False
|
|
|
|
|
|
def connect(s, url):
|
|
|
url = disambiguate_url(url, self.location)
|
|
|
if self.using_ssh:
|
|
|
self.log.debug("Tunneling connection to %s via %s", url, self.sshserver)
|
|
|
return tunnel.tunnel_connection(s, url, self.sshserver,
|
|
|
keyfile=self.sshkey, paramiko=self.paramiko,
|
|
|
password=password,
|
|
|
)
|
|
|
else:
|
|
|
return s.connect(url)
|
|
|
|
|
|
def maybe_tunnel(url):
|
|
|
"""like connect, but don't complete the connection (for use by heartbeat)"""
|
|
|
url = disambiguate_url(url, self.location)
|
|
|
if self.using_ssh:
|
|
|
self.log.debug("Tunneling connection to %s via %s", url, self.sshserver)
|
|
|
url,tunnelobj = tunnel.open_tunnel(url, self.sshserver,
|
|
|
keyfile=self.sshkey, paramiko=self.paramiko,
|
|
|
password=password,
|
|
|
)
|
|
|
return str(url)
|
|
|
return connect, maybe_tunnel
|
|
|
|
|
|
def register(self):
|
|
|
"""send the registration_request"""
|
|
|
|
|
|
self.log.info("Registering with controller at %s"%self.url)
|
|
|
ctx = self.context
|
|
|
connect,maybe_tunnel = self.init_connector()
|
|
|
reg = ctx.socket(zmq.DEALER)
|
|
|
reg.setsockopt(zmq.IDENTITY, self.bident)
|
|
|
connect(reg, self.url)
|
|
|
self.registrar = zmqstream.ZMQStream(reg, self.loop)
|
|
|
|
|
|
|
|
|
content = dict(uuid=self.ident)
|
|
|
self.registrar.on_recv(lambda msg: self.complete_registration(msg, connect, maybe_tunnel))
|
|
|
# print (self.session.key)
|
|
|
self.session.send(self.registrar, "registration_request", content=content)
|
|
|
|
|
|
def _report_ping(self, msg):
|
|
|
"""Callback for when the heartmonitor.Heart receives a ping"""
|
|
|
#self.log.debug("Received a ping: %s", msg)
|
|
|
self._hb_last_pinged = time.time()
|
|
|
|
|
|
def complete_registration(self, msg, connect, maybe_tunnel):
|
|
|
# print msg
|
|
|
self._abort_dc.stop()
|
|
|
ctx = self.context
|
|
|
loop = self.loop
|
|
|
identity = self.bident
|
|
|
idents,msg = self.session.feed_identities(msg)
|
|
|
msg = self.session.unserialize(msg)
|
|
|
content = msg['content']
|
|
|
info = self.connection_info
|
|
|
|
|
|
def url(key):
|
|
|
"""get zmq url for given channel"""
|
|
|
return str(info["interface"] + ":%i" % info[key])
|
|
|
|
|
|
if content['status'] == 'ok':
|
|
|
self.id = int(content['id'])
|
|
|
|
|
|
# launch heartbeat
|
|
|
# possibly forward hb ports with tunnels
|
|
|
hb_ping = maybe_tunnel(url('hb_ping'))
|
|
|
hb_pong = maybe_tunnel(url('hb_pong'))
|
|
|
|
|
|
hb_monitor = None
|
|
|
if self.max_heartbeat_misses > 0:
|
|
|
# Add a monitor socket which will record the last time a ping was seen
|
|
|
mon = self.context.socket(zmq.SUB)
|
|
|
mport = mon.bind_to_random_port('tcp://%s' % LOCALHOST)
|
|
|
mon.setsockopt(zmq.SUBSCRIBE, b"")
|
|
|
self._hb_listener = zmqstream.ZMQStream(mon, self.loop)
|
|
|
self._hb_listener.on_recv(self._report_ping)
|
|
|
|
|
|
|
|
|
hb_monitor = "tcp://%s:%i" % (LOCALHOST, mport)
|
|
|
|
|
|
heart = Heart(hb_ping, hb_pong, hb_monitor , heart_id=identity)
|
|
|
heart.start()
|
|
|
|
|
|
# create Shell Connections (MUX, Task, etc.):
|
|
|
shell_addrs = url('mux'), url('task')
|
|
|
|
|
|
# Use only one shell stream for mux and tasks
|
|
|
stream = zmqstream.ZMQStream(ctx.socket(zmq.ROUTER), loop)
|
|
|
stream.setsockopt(zmq.IDENTITY, identity)
|
|
|
shell_streams = [stream]
|
|
|
for addr in shell_addrs:
|
|
|
connect(stream, addr)
|
|
|
|
|
|
# control stream:
|
|
|
control_addr = url('control')
|
|
|
control_stream = zmqstream.ZMQStream(ctx.socket(zmq.ROUTER), loop)
|
|
|
control_stream.setsockopt(zmq.IDENTITY, identity)
|
|
|
connect(control_stream, control_addr)
|
|
|
|
|
|
# create iopub stream:
|
|
|
iopub_addr = url('iopub')
|
|
|
iopub_socket = ctx.socket(zmq.PUB)
|
|
|
iopub_socket.setsockopt(zmq.IDENTITY, identity)
|
|
|
connect(iopub_socket, iopub_addr)
|
|
|
|
|
|
# disable history:
|
|
|
self.config.HistoryManager.hist_file = ':memory:'
|
|
|
|
|
|
# Redirect input streams and set a display hook.
|
|
|
if self.out_stream_factory:
|
|
|
sys.stdout = self.out_stream_factory(self.session, iopub_socket, u'stdout')
|
|
|
sys.stdout.topic = cast_bytes('engine.%i.stdout' % self.id)
|
|
|
sys.stderr = self.out_stream_factory(self.session, iopub_socket, u'stderr')
|
|
|
sys.stderr.topic = cast_bytes('engine.%i.stderr' % self.id)
|
|
|
if self.display_hook_factory:
|
|
|
sys.displayhook = self.display_hook_factory(self.session, iopub_socket)
|
|
|
sys.displayhook.topic = cast_bytes('engine.%i.pyout' % self.id)
|
|
|
|
|
|
self.kernel = Kernel(config=self.config, int_id=self.id, ident=self.ident, session=self.session,
|
|
|
control_stream=control_stream, shell_streams=shell_streams, iopub_socket=iopub_socket,
|
|
|
loop=loop, user_ns=self.user_ns, log=self.log)
|
|
|
|
|
|
self.kernel.shell.display_pub.topic = cast_bytes('engine.%i.displaypub' % self.id)
|
|
|
|
|
|
|
|
|
# periodically check the heartbeat pings of the controller
|
|
|
# Should be started here and not in "start()" so that the right period can be taken
|
|
|
# from the hubs HeartBeatMonitor.period
|
|
|
if self.max_heartbeat_misses > 0:
|
|
|
# Use a slightly bigger check period than the hub signal period to not warn unnecessary
|
|
|
self.hb_check_period = int(content['hb_period'])+10
|
|
|
self.log.info("Starting to monitor the heartbeat signal from the hub every %i ms." , self.hb_check_period)
|
|
|
self._hb_reporter = ioloop.PeriodicCallback(self._hb_monitor, self.hb_check_period, self.loop)
|
|
|
self._hb_reporter.start()
|
|
|
else:
|
|
|
self.log.info("Monitoring of the heartbeat signal from the hub is not enabled.")
|
|
|
|
|
|
|
|
|
# FIXME: This is a hack until IPKernelApp and IPEngineApp can be fully merged
|
|
|
app = IPKernelApp(config=self.config, shell=self.kernel.shell, kernel=self.kernel, log=self.log)
|
|
|
app.init_profile_dir()
|
|
|
app.init_code()
|
|
|
|
|
|
self.kernel.start()
|
|
|
else:
|
|
|
self.log.fatal("Registration Failed: %s"%msg)
|
|
|
raise Exception("Registration Failed: %s"%msg)
|
|
|
|
|
|
self.log.info("Completed registration with id %i"%self.id)
|
|
|
|
|
|
|
|
|
def abort(self):
|
|
|
self.log.fatal("Registration timed out after %.1f seconds"%self.timeout)
|
|
|
if self.url.startswith('127.'):
|
|
|
self.log.fatal("""
|
|
|
If the controller and engines are not on the same machine,
|
|
|
you will have to instruct the controller to listen on an external IP (in ipcontroller_config.py):
|
|
|
c.HubFactory.ip='*' # for all interfaces, internal and external
|
|
|
c.HubFactory.ip='192.168.1.101' # or any interface that the engines can see
|
|
|
or tunnel connections via ssh.
|
|
|
""")
|
|
|
self.session.send(self.registrar, "unregistration_request", content=dict(id=self.id))
|
|
|
time.sleep(1)
|
|
|
sys.exit(255)
|
|
|
|
|
|
def _hb_monitor(self):
|
|
|
"""Callback to monitor the heartbeat from the controller"""
|
|
|
self._hb_listener.flush()
|
|
|
if self._hb_last_monitored > self._hb_last_pinged:
|
|
|
self._hb_missed_beats += 1
|
|
|
self.log.warn("No heartbeat in the last %s ms (%s time(s) in a row).", self.hb_check_period, self._hb_missed_beats)
|
|
|
else:
|
|
|
#self.log.debug("Heartbeat received (after missing %s beats).", self._hb_missed_beats)
|
|
|
self._hb_missed_beats = 0
|
|
|
|
|
|
if self._hb_missed_beats >= self.max_heartbeat_misses:
|
|
|
self.log.fatal("Maximum number of heartbeats misses reached (%s times %s ms), shutting down.",
|
|
|
self.max_heartbeat_misses, self.hb_check_period)
|
|
|
self.session.send(self.registrar, "unregistration_request", content=dict(id=self.id))
|
|
|
self.loop.stop()
|
|
|
|
|
|
self._hb_last_monitored = time.time()
|
|
|
|
|
|
|
|
|
def start(self):
|
|
|
dc = ioloop.DelayedCallback(self.register, 0, self.loop)
|
|
|
dc.start()
|
|
|
self._abort_dc = ioloop.DelayedCallback(self.abort, self.timeout*1000, self.loop)
|
|
|
self._abort_dc.start()
|
|
|
|
|
|
|
|
|
|
