You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
555 lines
17 KiB
555 lines
17 KiB
"""A kernel manager for multiple kernels"""
|
|
|
|
# Copyright (c) Jupyter Development Team.
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
|
import os
|
|
import uuid
|
|
import socket
|
|
|
|
import zmq
|
|
|
|
from traitlets.config.configurable import LoggingConfigurable
|
|
from ipython_genutils.importstring import import_item
|
|
from traitlets import (
|
|
Any, Bool, Dict, DottedObjectName, Instance, Unicode, default, observe
|
|
)
|
|
|
|
from .kernelspec import NATIVE_KERNEL_NAME, KernelSpecManager
|
|
from .manager import KernelManager, AsyncKernelManager
|
|
|
|
|
|
class DuplicateKernelError(Exception):
|
|
pass
|
|
|
|
|
|
def kernel_method(f):
|
|
"""decorator for proxying MKM.method(kernel_id) to individual KMs by ID"""
|
|
def wrapped(self, kernel_id, *args, **kwargs):
|
|
# get the kernel
|
|
km = self.get_kernel(kernel_id)
|
|
method = getattr(km, f.__name__)
|
|
# call the kernel's method
|
|
r = method(*args, **kwargs)
|
|
# last thing, call anything defined in the actual class method
|
|
# such as logging messages
|
|
f(self, kernel_id, *args, **kwargs)
|
|
# return the method result
|
|
return r
|
|
return wrapped
|
|
|
|
|
|
class MultiKernelManager(LoggingConfigurable):
|
|
"""A class for managing multiple kernels."""
|
|
|
|
default_kernel_name = Unicode(NATIVE_KERNEL_NAME, config=True,
|
|
help="The name of the default kernel to start"
|
|
)
|
|
|
|
kernel_spec_manager = Instance(KernelSpecManager, allow_none=True)
|
|
|
|
kernel_manager_class = DottedObjectName(
|
|
"jupyter_client.ioloop.IOLoopKernelManager", config=True,
|
|
help="""The kernel manager class. This is configurable to allow
|
|
subclassing of the KernelManager for customized behavior.
|
|
"""
|
|
)
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super().__init__(*args, **kwargs)
|
|
|
|
# Cache all the currently used ports
|
|
self.currently_used_ports = set()
|
|
|
|
@observe('kernel_manager_class')
|
|
def _kernel_manager_class_changed(self, change):
|
|
self.kernel_manager_factory = self._create_kernel_manager_factory()
|
|
|
|
kernel_manager_factory = Any(help="this is kernel_manager_class after import")
|
|
|
|
@default('kernel_manager_factory')
|
|
def _kernel_manager_factory_default(self):
|
|
return self._create_kernel_manager_factory()
|
|
|
|
def _create_kernel_manager_factory(self):
|
|
kernel_manager_ctor = import_item(self.kernel_manager_class)
|
|
|
|
def create_kernel_manager(*args, **kwargs):
|
|
if self.shared_context:
|
|
if self.context.closed:
|
|
# recreate context if closed
|
|
self.context = self._context_default()
|
|
kwargs.setdefault("context", self.context)
|
|
km = kernel_manager_ctor(*args, **kwargs)
|
|
|
|
if km.cache_ports:
|
|
km.shell_port = self._find_available_port(km.ip)
|
|
km.iopub_port = self._find_available_port(km.ip)
|
|
km.stdin_port = self._find_available_port(km.ip)
|
|
km.hb_port = self._find_available_port(km.ip)
|
|
km.control_port = self._find_available_port(km.ip)
|
|
|
|
return km
|
|
|
|
return create_kernel_manager
|
|
|
|
def _find_available_port(self, ip):
|
|
while True:
|
|
tmp_sock = socket.socket()
|
|
tmp_sock.setsockopt(socket.SOL_SOCKET, socket.SO_LINGER, b'\0' * 8)
|
|
tmp_sock.bind((ip, 0))
|
|
port = tmp_sock.getsockname()[1]
|
|
tmp_sock.close()
|
|
|
|
# This is a workaround for https://github.com/jupyter/jupyter_client/issues/487
|
|
# We prevent two kernels to have the same ports.
|
|
if port not in self.currently_used_ports:
|
|
self.currently_used_ports.add(port)
|
|
|
|
return port
|
|
|
|
shared_context = Bool(
|
|
True,
|
|
config=True,
|
|
help="Share a single zmq.Context to talk to all my kernels",
|
|
)
|
|
|
|
_created_context = Bool(False)
|
|
|
|
context = Instance('zmq.Context')
|
|
|
|
@default("context")
|
|
def _context_default(self):
|
|
self._created_context = True
|
|
return zmq.Context()
|
|
|
|
def __del__(self):
|
|
if self._created_context and self.context and not self.context.closed:
|
|
if self.log:
|
|
self.log.debug("Destroying zmq context for %s", self)
|
|
self.context.destroy()
|
|
try:
|
|
super_del = super().__del__
|
|
except AttributeError:
|
|
pass
|
|
else:
|
|
super_del()
|
|
|
|
connection_dir = Unicode('')
|
|
|
|
_kernels = Dict()
|
|
|
|
def list_kernel_ids(self):
|
|
"""Return a list of the kernel ids of the active kernels."""
|
|
# Create a copy so we can iterate over kernels in operations
|
|
# that delete keys.
|
|
return list(self._kernels.keys())
|
|
|
|
def __len__(self):
|
|
"""Return the number of running kernels."""
|
|
return len(self.list_kernel_ids())
|
|
|
|
def __contains__(self, kernel_id):
|
|
return kernel_id in self._kernels
|
|
|
|
def pre_start_kernel(self, kernel_name, kwargs):
|
|
# kwargs should be mutable, passing it as a dict argument.
|
|
kernel_id = kwargs.pop('kernel_id', self.new_kernel_id(**kwargs))
|
|
if kernel_id in self:
|
|
raise DuplicateKernelError('Kernel already exists: %s' % kernel_id)
|
|
|
|
if kernel_name is None:
|
|
kernel_name = self.default_kernel_name
|
|
# kernel_manager_factory is the constructor for the KernelManager
|
|
# subclass we are using. It can be configured as any Configurable,
|
|
# including things like its transport and ip.
|
|
constructor_kwargs = {}
|
|
if self.kernel_spec_manager:
|
|
constructor_kwargs['kernel_spec_manager'] = self.kernel_spec_manager
|
|
km = self.kernel_manager_factory(connection_file=os.path.join(
|
|
self.connection_dir, "kernel-%s.json" % kernel_id),
|
|
parent=self, log=self.log, kernel_name=kernel_name,
|
|
**constructor_kwargs
|
|
)
|
|
return km, kernel_name, kernel_id
|
|
|
|
def start_kernel(self, kernel_name=None, **kwargs):
|
|
"""Start a new kernel.
|
|
|
|
The caller can pick a kernel_id by passing one in as a keyword arg,
|
|
otherwise one will be generated using new_kernel_id().
|
|
|
|
The kernel ID for the newly started kernel is returned.
|
|
"""
|
|
km, kernel_name, kernel_id = self.pre_start_kernel(kernel_name, kwargs)
|
|
km.start_kernel(**kwargs)
|
|
self._kernels[kernel_id] = km
|
|
return kernel_id
|
|
|
|
def shutdown_kernel(self, kernel_id, now=False, restart=False):
|
|
"""Shutdown a kernel by its kernel uuid.
|
|
|
|
Parameters
|
|
==========
|
|
kernel_id : uuid
|
|
The id of the kernel to shutdown.
|
|
now : bool
|
|
Should the kernel be shutdown forcibly using a signal.
|
|
restart : bool
|
|
Will the kernel be restarted?
|
|
"""
|
|
self.log.info("Kernel shutdown: %s" % kernel_id)
|
|
|
|
km = self.get_kernel(kernel_id)
|
|
|
|
ports = (
|
|
km.shell_port, km.iopub_port, km.stdin_port,
|
|
km.hb_port, km.control_port
|
|
)
|
|
|
|
km.shutdown_kernel(now=now, restart=restart)
|
|
self.remove_kernel(kernel_id)
|
|
|
|
if km.cache_ports and not restart:
|
|
for port in ports:
|
|
self.currently_used_ports.remove(port)
|
|
|
|
@kernel_method
|
|
def request_shutdown(self, kernel_id, restart=False):
|
|
"""Ask a kernel to shut down by its kernel uuid"""
|
|
|
|
@kernel_method
|
|
def finish_shutdown(self, kernel_id, waittime=None, pollinterval=0.1):
|
|
"""Wait for a kernel to finish shutting down, and kill it if it doesn't
|
|
"""
|
|
self.log.info("Kernel shutdown: %s" % kernel_id)
|
|
|
|
@kernel_method
|
|
def cleanup(self, kernel_id, connection_file=True):
|
|
"""Clean up a kernel's resources"""
|
|
|
|
@kernel_method
|
|
def cleanup_resources(self, kernel_id, restart=False):
|
|
"""Clean up a kernel's resources"""
|
|
|
|
def remove_kernel(self, kernel_id):
|
|
"""remove a kernel from our mapping.
|
|
|
|
Mainly so that a kernel can be removed if it is already dead,
|
|
without having to call shutdown_kernel.
|
|
|
|
The kernel object is returned.
|
|
"""
|
|
return self._kernels.pop(kernel_id)
|
|
|
|
def shutdown_all(self, now=False):
|
|
"""Shutdown all kernels."""
|
|
kids = self.list_kernel_ids()
|
|
for kid in kids:
|
|
self.request_shutdown(kid)
|
|
for kid in kids:
|
|
self.finish_shutdown(kid)
|
|
|
|
# Determine which cleanup method to call
|
|
# See comment in KernelManager.shutdown_kernel().
|
|
km = self.get_kernel(kid)
|
|
overrides_cleanup = type(km).cleanup is not KernelManager.cleanup
|
|
overrides_cleanup_resources = type(km).cleanup_resources is not KernelManager.cleanup_resources
|
|
|
|
if overrides_cleanup and not overrides_cleanup_resources:
|
|
km.cleanup(connection_file=True)
|
|
else:
|
|
km.cleanup_resources(restart=False)
|
|
|
|
self.remove_kernel(kid)
|
|
|
|
@kernel_method
|
|
def interrupt_kernel(self, kernel_id):
|
|
"""Interrupt (SIGINT) the kernel by its uuid.
|
|
|
|
Parameters
|
|
==========
|
|
kernel_id : uuid
|
|
The id of the kernel to interrupt.
|
|
"""
|
|
self.log.info("Kernel interrupted: %s" % kernel_id)
|
|
|
|
@kernel_method
|
|
def signal_kernel(self, kernel_id, signum):
|
|
"""Sends a signal to the kernel by its uuid.
|
|
|
|
Note that since only SIGTERM is supported on Windows, this function
|
|
is only useful on Unix systems.
|
|
|
|
Parameters
|
|
==========
|
|
kernel_id : uuid
|
|
The id of the kernel to signal.
|
|
"""
|
|
self.log.info("Signaled Kernel %s with %s" % (kernel_id, signum))
|
|
|
|
@kernel_method
|
|
def restart_kernel(self, kernel_id, now=False):
|
|
"""Restart a kernel by its uuid, keeping the same ports.
|
|
|
|
Parameters
|
|
==========
|
|
kernel_id : uuid
|
|
The id of the kernel to interrupt.
|
|
"""
|
|
self.log.info("Kernel restarted: %s" % kernel_id)
|
|
|
|
@kernel_method
|
|
def is_alive(self, kernel_id):
|
|
"""Is the kernel alive.
|
|
|
|
This calls KernelManager.is_alive() which calls Popen.poll on the
|
|
actual kernel subprocess.
|
|
|
|
Parameters
|
|
==========
|
|
kernel_id : uuid
|
|
The id of the kernel.
|
|
"""
|
|
|
|
def _check_kernel_id(self, kernel_id):
|
|
"""check that a kernel id is valid"""
|
|
if kernel_id not in self:
|
|
raise KeyError("Kernel with id not found: %s" % kernel_id)
|
|
|
|
def get_kernel(self, kernel_id):
|
|
"""Get the single KernelManager object for a kernel by its uuid.
|
|
|
|
Parameters
|
|
==========
|
|
kernel_id : uuid
|
|
The id of the kernel.
|
|
"""
|
|
self._check_kernel_id(kernel_id)
|
|
return self._kernels[kernel_id]
|
|
|
|
@kernel_method
|
|
def add_restart_callback(self, kernel_id, callback, event='restart'):
|
|
"""add a callback for the KernelRestarter"""
|
|
|
|
@kernel_method
|
|
def remove_restart_callback(self, kernel_id, callback, event='restart'):
|
|
"""remove a callback for the KernelRestarter"""
|
|
|
|
@kernel_method
|
|
def get_connection_info(self, kernel_id):
|
|
"""Return a dictionary of connection data for a kernel.
|
|
|
|
Parameters
|
|
==========
|
|
kernel_id : uuid
|
|
The id of the kernel.
|
|
|
|
Returns
|
|
=======
|
|
connection_dict : dict
|
|
A dict of the information needed to connect to a kernel.
|
|
This includes the ip address and the integer port
|
|
numbers of the different channels (stdin_port, iopub_port,
|
|
shell_port, hb_port).
|
|
"""
|
|
|
|
@kernel_method
|
|
def connect_iopub(self, kernel_id, identity=None):
|
|
"""Return a zmq Socket connected to the iopub channel.
|
|
|
|
Parameters
|
|
==========
|
|
kernel_id : uuid
|
|
The id of the kernel
|
|
identity : bytes (optional)
|
|
The zmq identity of the socket
|
|
|
|
Returns
|
|
=======
|
|
stream : zmq Socket or ZMQStream
|
|
"""
|
|
|
|
@kernel_method
|
|
def connect_shell(self, kernel_id, identity=None):
|
|
"""Return a zmq Socket connected to the shell channel.
|
|
|
|
Parameters
|
|
==========
|
|
kernel_id : uuid
|
|
The id of the kernel
|
|
identity : bytes (optional)
|
|
The zmq identity of the socket
|
|
|
|
Returns
|
|
=======
|
|
stream : zmq Socket or ZMQStream
|
|
"""
|
|
|
|
@kernel_method
|
|
def connect_control(self, kernel_id, identity=None):
|
|
"""Return a zmq Socket connected to the control channel.
|
|
|
|
Parameters
|
|
==========
|
|
kernel_id : uuid
|
|
The id of the kernel
|
|
identity : bytes (optional)
|
|
The zmq identity of the socket
|
|
|
|
Returns
|
|
=======
|
|
stream : zmq Socket or ZMQStream
|
|
"""
|
|
|
|
@kernel_method
|
|
def connect_stdin(self, kernel_id, identity=None):
|
|
"""Return a zmq Socket connected to the stdin channel.
|
|
|
|
Parameters
|
|
==========
|
|
kernel_id : uuid
|
|
The id of the kernel
|
|
identity : bytes (optional)
|
|
The zmq identity of the socket
|
|
|
|
Returns
|
|
=======
|
|
stream : zmq Socket or ZMQStream
|
|
"""
|
|
|
|
@kernel_method
|
|
def connect_hb(self, kernel_id, identity=None):
|
|
"""Return a zmq Socket connected to the hb channel.
|
|
|
|
Parameters
|
|
==========
|
|
kernel_id : uuid
|
|
The id of the kernel
|
|
identity : bytes (optional)
|
|
The zmq identity of the socket
|
|
|
|
Returns
|
|
=======
|
|
stream : zmq Socket or ZMQStream
|
|
"""
|
|
|
|
def new_kernel_id(self, **kwargs):
|
|
"""
|
|
Returns the id to associate with the kernel for this request. Subclasses may override
|
|
this method to substitute other sources of kernel ids.
|
|
:param kwargs:
|
|
:return: string-ized version 4 uuid
|
|
"""
|
|
return str(uuid.uuid4())
|
|
|
|
|
|
class AsyncMultiKernelManager(MultiKernelManager):
|
|
|
|
kernel_manager_class = DottedObjectName(
|
|
"jupyter_client.ioloop.AsyncIOLoopKernelManager", config=True,
|
|
help="""The kernel manager class. This is configurable to allow
|
|
subclassing of the AsyncKernelManager for customized behavior.
|
|
"""
|
|
)
|
|
|
|
async def start_kernel(self, kernel_name=None, **kwargs):
|
|
"""Start a new kernel.
|
|
|
|
The caller can pick a kernel_id by passing one in as a keyword arg,
|
|
otherwise one will be generated using new_kernel_id().
|
|
|
|
The kernel ID for the newly started kernel is returned.
|
|
"""
|
|
km, kernel_name, kernel_id = self.pre_start_kernel(kernel_name, kwargs)
|
|
if not isinstance(km, AsyncKernelManager):
|
|
self.log.warning("Kernel manager class ({km_class}) is not an instance of 'AsyncKernelManager'!".
|
|
format(km_class=self.kernel_manager_class.__class__))
|
|
await km.start_kernel(**kwargs)
|
|
self._kernels[kernel_id] = km
|
|
return kernel_id
|
|
|
|
async def shutdown_kernel(self, kernel_id, now=False, restart=False):
|
|
"""Shutdown a kernel by its kernel uuid.
|
|
|
|
Parameters
|
|
==========
|
|
kernel_id : uuid
|
|
The id of the kernel to shutdown.
|
|
now : bool
|
|
Should the kernel be shutdown forcibly using a signal.
|
|
restart : bool
|
|
Will the kernel be restarted?
|
|
"""
|
|
self.log.info("Kernel shutdown: %s" % kernel_id)
|
|
|
|
km = self.get_kernel(kernel_id)
|
|
|
|
ports = (
|
|
km.shell_port, km.iopub_port, km.stdin_port,
|
|
km.hb_port, km.control_port
|
|
)
|
|
|
|
await km.shutdown_kernel(now, restart)
|
|
self.remove_kernel(kernel_id)
|
|
|
|
if km.cache_ports and not restart:
|
|
for port in ports:
|
|
self.currently_used_ports.remove(port)
|
|
|
|
async def finish_shutdown(self, kernel_id, waittime=None, pollinterval=0.1):
|
|
"""Wait for a kernel to finish shutting down, and kill it if it doesn't
|
|
"""
|
|
km = self.get_kernel(kernel_id)
|
|
await km.finish_shutdown(waittime, pollinterval)
|
|
self.log.info("Kernel shutdown: %s" % kernel_id)
|
|
|
|
async def interrupt_kernel(self, kernel_id):
|
|
"""Interrupt (SIGINT) the kernel by its uuid.
|
|
|
|
Parameters
|
|
==========
|
|
kernel_id : uuid
|
|
The id of the kernel to interrupt.
|
|
"""
|
|
km = self.get_kernel(kernel_id)
|
|
await km.interrupt_kernel()
|
|
self.log.info("Kernel interrupted: %s" % kernel_id)
|
|
|
|
async def signal_kernel(self, kernel_id, signum):
|
|
"""Sends a signal to the kernel by its uuid.
|
|
|
|
Note that since only SIGTERM is supported on Windows, this function
|
|
is only useful on Unix systems.
|
|
|
|
Parameters
|
|
==========
|
|
kernel_id : uuid
|
|
The id of the kernel to signal.
|
|
"""
|
|
km = self.get_kernel(kernel_id)
|
|
await km.signal_kernel(signum)
|
|
self.log.info("Signaled Kernel %s with %s" % (kernel_id, signum))
|
|
|
|
async def restart_kernel(self, kernel_id, now=False):
|
|
"""Restart a kernel by its uuid, keeping the same ports.
|
|
|
|
Parameters
|
|
==========
|
|
kernel_id : uuid
|
|
The id of the kernel to interrupt.
|
|
"""
|
|
km = self.get_kernel(kernel_id)
|
|
await km.restart_kernel(now)
|
|
self.log.info("Kernel restarted: %s" % kernel_id)
|
|
|
|
async def shutdown_all(self, now=False):
|
|
"""Shutdown all kernels."""
|
|
kids = self.list_kernel_ids()
|
|
for kid in kids:
|
|
self.request_shutdown(kid)
|
|
for kid in kids:
|
|
await self.finish_shutdown(kid)
|
|
self.cleanup_resources(kid)
|
|
self.remove_kernel(kid)
|