|
|
"""Utilities for connecting to kernels
|
|
|
|
|
|
Authors:
|
|
|
|
|
|
* Min Ragan-Kelley
|
|
|
|
|
|
"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2013 The IPython Development Team
|
|
|
#
|
|
|
# Distributed under the terms of the BSD License. The full license is in
|
|
|
# the file COPYING, distributed as part of this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
from __future__ import absolute_import
|
|
|
|
|
|
import glob
|
|
|
import json
|
|
|
import os
|
|
|
import socket
|
|
|
import sys
|
|
|
from getpass import getpass
|
|
|
from subprocess import Popen, PIPE
|
|
|
import tempfile
|
|
|
|
|
|
import zmq
|
|
|
|
|
|
# external imports
|
|
|
from IPython.external.ssh import tunnel
|
|
|
|
|
|
# IPython imports
|
|
|
# from IPython.config import Configurable
|
|
|
from IPython.core.profiledir import ProfileDir
|
|
|
from IPython.utils.localinterfaces import LOCALHOST
|
|
|
from IPython.utils.path import filefind, get_ipython_dir
|
|
|
from IPython.utils.py3compat import str_to_bytes, bytes_to_str
|
|
|
from IPython.utils.traitlets import (
|
|
|
Bool, Integer, Unicode, CaselessStrEnum,
|
|
|
HasTraits,
|
|
|
)
|
|
|
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Working with Connection Files
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
def write_connection_file(fname=None, shell_port=0, iopub_port=0, stdin_port=0, hb_port=0,
|
|
|
control_port=0, ip=LOCALHOST, key=b'', transport='tcp',
|
|
|
signature_scheme='hmac-sha256',
|
|
|
):
|
|
|
"""Generates a JSON config file, including the selection of random ports.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
|
|
|
fname : unicode
|
|
|
The path to the file to write
|
|
|
|
|
|
shell_port : int, optional
|
|
|
The port to use for ROUTER (shell) channel.
|
|
|
|
|
|
iopub_port : int, optional
|
|
|
The port to use for the SUB channel.
|
|
|
|
|
|
stdin_port : int, optional
|
|
|
The port to use for the ROUTER (raw input) channel.
|
|
|
|
|
|
control_port : int, optional
|
|
|
The port to use for the ROUTER (control) channel.
|
|
|
|
|
|
hb_port : int, optional
|
|
|
The port to use for the heartbeat REP channel.
|
|
|
|
|
|
ip : str, optional
|
|
|
The ip address the kernel will bind to.
|
|
|
|
|
|
key : str, optional
|
|
|
The Session key used for message authentication.
|
|
|
|
|
|
signature_scheme : str, optional
|
|
|
The scheme used for message authentication.
|
|
|
This has the form 'digest-hash', where 'digest'
|
|
|
is the scheme used for digests, and 'hash' is the name of the hash function
|
|
|
used by the digest scheme.
|
|
|
Currently, 'hmac' is the only supported digest scheme,
|
|
|
and 'sha256' is the default hash function.
|
|
|
|
|
|
"""
|
|
|
# default to temporary connector file
|
|
|
if not fname:
|
|
|
fname = tempfile.mktemp('.json')
|
|
|
|
|
|
# Find open ports as necessary.
|
|
|
|
|
|
ports = []
|
|
|
ports_needed = int(shell_port <= 0) + \
|
|
|
int(iopub_port <= 0) + \
|
|
|
int(stdin_port <= 0) + \
|
|
|
int(control_port <= 0) + \
|
|
|
int(hb_port <= 0)
|
|
|
if transport == 'tcp':
|
|
|
for i in range(ports_needed):
|
|
|
sock = socket.socket()
|
|
|
sock.bind(('', 0))
|
|
|
ports.append(sock)
|
|
|
for i, sock in enumerate(ports):
|
|
|
port = sock.getsockname()[1]
|
|
|
sock.close()
|
|
|
ports[i] = port
|
|
|
else:
|
|
|
N = 1
|
|
|
for i in range(ports_needed):
|
|
|
while os.path.exists("%s-%s" % (ip, str(N))):
|
|
|
N += 1
|
|
|
ports.append(N)
|
|
|
N += 1
|
|
|
if shell_port <= 0:
|
|
|
shell_port = ports.pop(0)
|
|
|
if iopub_port <= 0:
|
|
|
iopub_port = ports.pop(0)
|
|
|
if stdin_port <= 0:
|
|
|
stdin_port = ports.pop(0)
|
|
|
if control_port <= 0:
|
|
|
control_port = ports.pop(0)
|
|
|
if hb_port <= 0:
|
|
|
hb_port = ports.pop(0)
|
|
|
|
|
|
cfg = dict( shell_port=shell_port,
|
|
|
iopub_port=iopub_port,
|
|
|
stdin_port=stdin_port,
|
|
|
control_port=control_port,
|
|
|
hb_port=hb_port,
|
|
|
)
|
|
|
cfg['ip'] = ip
|
|
|
cfg['key'] = bytes_to_str(key)
|
|
|
cfg['transport'] = transport
|
|
|
cfg['signature_scheme'] = signature_scheme
|
|
|
|
|
|
with open(fname, 'w') as f:
|
|
|
f.write(json.dumps(cfg, indent=2))
|
|
|
|
|
|
return fname, cfg
|
|
|
|
|
|
|
|
|
def get_connection_file(app=None):
|
|
|
"""Return the path to the connection file of an app
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
app : IPKernelApp instance [optional]
|
|
|
If unspecified, the currently running app will be used
|
|
|
"""
|
|
|
if app is None:
|
|
|
from IPython.kernel.zmq.kernelapp import IPKernelApp
|
|
|
if not IPKernelApp.initialized():
|
|
|
raise RuntimeError("app not specified, and not in a running Kernel")
|
|
|
|
|
|
app = IPKernelApp.instance()
|
|
|
return filefind(app.connection_file, ['.', app.profile_dir.security_dir])
|
|
|
|
|
|
|
|
|
def find_connection_file(filename, profile=None):
|
|
|
"""find a connection file, and return its absolute path.
|
|
|
|
|
|
The current working directory and the profile's security
|
|
|
directory will be searched for the file if it is not given by
|
|
|
absolute path.
|
|
|
|
|
|
If profile is unspecified, then the current running application's
|
|
|
profile will be used, or 'default', if not run from IPython.
|
|
|
|
|
|
If the argument does not match an existing file, it will be interpreted as a
|
|
|
fileglob, and the matching file in the profile's security dir with
|
|
|
the latest access time will be used.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
filename : str
|
|
|
The connection file or fileglob to search for.
|
|
|
profile : str [optional]
|
|
|
The name of the profile to use when searching for the connection file,
|
|
|
if different from the current IPython session or 'default'.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
str : The absolute path of the connection file.
|
|
|
"""
|
|
|
from IPython.core.application import BaseIPythonApplication as IPApp
|
|
|
try:
|
|
|
# quick check for absolute path, before going through logic
|
|
|
return filefind(filename)
|
|
|
except IOError:
|
|
|
pass
|
|
|
|
|
|
if profile is None:
|
|
|
# profile unspecified, check if running from an IPython app
|
|
|
if IPApp.initialized():
|
|
|
app = IPApp.instance()
|
|
|
profile_dir = app.profile_dir
|
|
|
else:
|
|
|
# not running in IPython, use default profile
|
|
|
profile_dir = ProfileDir.find_profile_dir_by_name(get_ipython_dir(), 'default')
|
|
|
else:
|
|
|
# find profiledir by profile name:
|
|
|
profile_dir = ProfileDir.find_profile_dir_by_name(get_ipython_dir(), profile)
|
|
|
security_dir = profile_dir.security_dir
|
|
|
|
|
|
try:
|
|
|
# first, try explicit name
|
|
|
return filefind(filename, ['.', security_dir])
|
|
|
except IOError:
|
|
|
pass
|
|
|
|
|
|
# not found by full name
|
|
|
|
|
|
if '*' in filename:
|
|
|
# given as a glob already
|
|
|
pat = filename
|
|
|
else:
|
|
|
# accept any substring match
|
|
|
pat = '*%s*' % filename
|
|
|
matches = glob.glob( os.path.join(security_dir, pat) )
|
|
|
if not matches:
|
|
|
raise IOError("Could not find %r in %r" % (filename, security_dir))
|
|
|
elif len(matches) == 1:
|
|
|
return matches[0]
|
|
|
else:
|
|
|
# get most recent match, by access time:
|
|
|
return sorted(matches, key=lambda f: os.stat(f).st_atime)[-1]
|
|
|
|
|
|
|
|
|
def get_connection_info(connection_file=None, unpack=False, profile=None):
|
|
|
"""Return the connection information for the current Kernel.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
connection_file : str [optional]
|
|
|
The connection file to be used. Can be given by absolute path, or
|
|
|
IPython will search in the security directory of a given profile.
|
|
|
If run from IPython,
|
|
|
|
|
|
If unspecified, the connection file for the currently running
|
|
|
IPython Kernel will be used, which is only allowed from inside a kernel.
|
|
|
unpack : bool [default: False]
|
|
|
if True, return the unpacked dict, otherwise just the string contents
|
|
|
of the file.
|
|
|
profile : str [optional]
|
|
|
The name of the profile to use when searching for the connection file,
|
|
|
if different from the current IPython session or 'default'.
|
|
|
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
The connection dictionary of the current kernel, as string or dict,
|
|
|
depending on `unpack`.
|
|
|
"""
|
|
|
if connection_file is None:
|
|
|
# get connection file from current kernel
|
|
|
cf = get_connection_file()
|
|
|
else:
|
|
|
# connection file specified, allow shortnames:
|
|
|
cf = find_connection_file(connection_file, profile=profile)
|
|
|
|
|
|
with open(cf) as f:
|
|
|
info = f.read()
|
|
|
|
|
|
if unpack:
|
|
|
info = json.loads(info)
|
|
|
# ensure key is bytes:
|
|
|
info['key'] = str_to_bytes(info.get('key', ''))
|
|
|
return info
|
|
|
|
|
|
|
|
|
def connect_qtconsole(connection_file=None, argv=None, profile=None):
|
|
|
"""Connect a qtconsole to the current kernel.
|
|
|
|
|
|
This is useful for connecting a second qtconsole to a kernel, or to a
|
|
|
local notebook.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
connection_file : str [optional]
|
|
|
The connection file to be used. Can be given by absolute path, or
|
|
|
IPython will search in the security directory of a given profile.
|
|
|
If run from IPython,
|
|
|
|
|
|
If unspecified, the connection file for the currently running
|
|
|
IPython Kernel will be used, which is only allowed from inside a kernel.
|
|
|
argv : list [optional]
|
|
|
Any extra args to be passed to the console.
|
|
|
profile : str [optional]
|
|
|
The name of the profile to use when searching for the connection file,
|
|
|
if different from the current IPython session or 'default'.
|
|
|
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
subprocess.Popen instance running the qtconsole frontend
|
|
|
"""
|
|
|
argv = [] if argv is None else argv
|
|
|
|
|
|
if connection_file is None:
|
|
|
# get connection file from current kernel
|
|
|
cf = get_connection_file()
|
|
|
else:
|
|
|
cf = find_connection_file(connection_file, profile=profile)
|
|
|
|
|
|
cmd = ';'.join([
|
|
|
"from IPython.qt.console import qtconsoleapp",
|
|
|
"qtconsoleapp.main()"
|
|
|
])
|
|
|
|
|
|
return Popen([sys.executable, '-c', cmd, '--existing', cf] + argv,
|
|
|
stdout=PIPE, stderr=PIPE, close_fds=True,
|
|
|
)
|
|
|
|
|
|
|
|
|
def tunnel_to_kernel(connection_info, sshserver, sshkey=None):
|
|
|
"""tunnel connections to a kernel via ssh
|
|
|
|
|
|
This will open four SSH tunnels from localhost on this machine to the
|
|
|
ports associated with the kernel. They can be either direct
|
|
|
localhost-localhost tunnels, or if an intermediate server is necessary,
|
|
|
the kernel must be listening on a public IP.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
connection_info : dict or str (path)
|
|
|
Either a connection dict, or the path to a JSON connection file
|
|
|
sshserver : str
|
|
|
The ssh sever to use to tunnel to the kernel. Can be a full
|
|
|
`user@server:port` string. ssh config aliases are respected.
|
|
|
sshkey : str [optional]
|
|
|
Path to file containing ssh key to use for authentication.
|
|
|
Only necessary if your ssh config does not already associate
|
|
|
a keyfile with the host.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
|
|
|
(shell, iopub, stdin, hb) : ints
|
|
|
The four ports on localhost that have been forwarded to the kernel.
|
|
|
"""
|
|
|
if isinstance(connection_info, basestring):
|
|
|
# it's a path, unpack it
|
|
|
with open(connection_info) as f:
|
|
|
connection_info = json.loads(f.read())
|
|
|
|
|
|
cf = connection_info
|
|
|
|
|
|
lports = tunnel.select_random_ports(4)
|
|
|
rports = cf['shell_port'], cf['iopub_port'], cf['stdin_port'], cf['hb_port']
|
|
|
|
|
|
remote_ip = cf['ip']
|
|
|
|
|
|
if tunnel.try_passwordless_ssh(sshserver, sshkey):
|
|
|
password=False
|
|
|
else:
|
|
|
password = getpass("SSH Password for %s: "%sshserver)
|
|
|
|
|
|
for lp,rp in zip(lports, rports):
|
|
|
tunnel.ssh_tunnel(lp, rp, sshserver, remote_ip, sshkey, password)
|
|
|
|
|
|
return tuple(lports)
|
|
|
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Mixin for classes that work with connection files
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
channel_socket_types = {
|
|
|
'hb' : zmq.REQ,
|
|
|
'shell' : zmq.DEALER,
|
|
|
'iopub' : zmq.SUB,
|
|
|
'stdin' : zmq.DEALER,
|
|
|
'control': zmq.DEALER,
|
|
|
}
|
|
|
|
|
|
port_names = [ "%s_port" % channel for channel in ('shell', 'stdin', 'iopub', 'hb', 'control')]
|
|
|
|
|
|
class ConnectionFileMixin(HasTraits):
|
|
|
"""Mixin for configurable classes that work with connection files"""
|
|
|
|
|
|
# The addresses for the communication channels
|
|
|
connection_file = Unicode('')
|
|
|
_connection_file_written = Bool(False)
|
|
|
|
|
|
transport = CaselessStrEnum(['tcp', 'ipc'], default_value='tcp', config=True)
|
|
|
|
|
|
ip = Unicode(LOCALHOST, config=True,
|
|
|
help="""Set the kernel\'s IP address [default localhost].
|
|
|
If the IP address is something other than localhost, then
|
|
|
Consoles on other machines will be able to connect
|
|
|
to the Kernel, so be careful!"""
|
|
|
)
|
|
|
|
|
|
def _ip_default(self):
|
|
|
if self.transport == 'ipc':
|
|
|
if self.connection_file:
|
|
|
return os.path.splitext(self.connection_file)[0] + '-ipc'
|
|
|
else:
|
|
|
return 'kernel-ipc'
|
|
|
else:
|
|
|
return LOCALHOST
|
|
|
|
|
|
def _ip_changed(self, name, old, new):
|
|
|
if new == '*':
|
|
|
self.ip = '0.0.0.0'
|
|
|
|
|
|
# protected traits
|
|
|
|
|
|
shell_port = Integer(0)
|
|
|
iopub_port = Integer(0)
|
|
|
stdin_port = Integer(0)
|
|
|
control_port = Integer(0)
|
|
|
hb_port = Integer(0)
|
|
|
|
|
|
@property
|
|
|
def ports(self):
|
|
|
return [ getattr(self, name) for name in port_names ]
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# Connection and ipc file management
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
def get_connection_info(self):
|
|
|
"""return the connection info as a dict"""
|
|
|
return dict(
|
|
|
transport=self.transport,
|
|
|
ip=self.ip,
|
|
|
shell_port=self.shell_port,
|
|
|
iopub_port=self.iopub_port,
|
|
|
stdin_port=self.stdin_port,
|
|
|
hb_port=self.hb_port,
|
|
|
control_port=self.control_port,
|
|
|
signature_scheme=self.session.signature_scheme,
|
|
|
key=self.session.key,
|
|
|
)
|
|
|
|
|
|
def cleanup_connection_file(self):
|
|
|
"""Cleanup connection file *if we wrote it*
|
|
|
|
|
|
Will not raise if the connection file was already removed somehow.
|
|
|
"""
|
|
|
if self._connection_file_written:
|
|
|
# cleanup connection files on full shutdown of kernel we started
|
|
|
self._connection_file_written = False
|
|
|
try:
|
|
|
os.remove(self.connection_file)
|
|
|
except (IOError, OSError, AttributeError):
|
|
|
pass
|
|
|
|
|
|
def cleanup_ipc_files(self):
|
|
|
"""Cleanup ipc files if we wrote them."""
|
|
|
if self.transport != 'ipc':
|
|
|
return
|
|
|
for port in self.ports:
|
|
|
ipcfile = "%s-%i" % (self.ip, port)
|
|
|
try:
|
|
|
os.remove(ipcfile)
|
|
|
except (IOError, OSError):
|
|
|
pass
|
|
|
|
|
|
def write_connection_file(self):
|
|
|
"""Write connection info to JSON dict in self.connection_file."""
|
|
|
if self._connection_file_written:
|
|
|
return
|
|
|
|
|
|
self.connection_file, cfg = write_connection_file(self.connection_file,
|
|
|
transport=self.transport, ip=self.ip, key=self.session.key,
|
|
|
stdin_port=self.stdin_port, iopub_port=self.iopub_port,
|
|
|
shell_port=self.shell_port, hb_port=self.hb_port,
|
|
|
control_port=self.control_port,
|
|
|
signature_scheme=self.session.signature_scheme,
|
|
|
)
|
|
|
# write_connection_file also sets default ports:
|
|
|
for name in port_names:
|
|
|
setattr(self, name, cfg[name])
|
|
|
|
|
|
self._connection_file_written = True
|
|
|
|
|
|
def load_connection_file(self):
|
|
|
"""Load connection info from JSON dict in self.connection_file."""
|
|
|
with open(self.connection_file) as f:
|
|
|
cfg = json.loads(f.read())
|
|
|
|
|
|
self.transport = cfg.get('transport', 'tcp')
|
|
|
self.ip = cfg['ip']
|
|
|
for name in port_names:
|
|
|
setattr(self, name, cfg[name])
|
|
|
if 'key' in cfg:
|
|
|
self.session.key = str_to_bytes(cfg['key'])
|
|
|
if cfg.get('signature_scheme'):
|
|
|
self.session.signature_scheme = cfg['signature_scheme']
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# Creating connected sockets
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
def _make_url(self, channel):
|
|
|
"""Make a ZeroMQ URL for a given channel."""
|
|
|
transport = self.transport
|
|
|
ip = self.ip
|
|
|
port = getattr(self, '%s_port' % channel)
|
|
|
|
|
|
if transport == 'tcp':
|
|
|
return "tcp://%s:%i" % (ip, port)
|
|
|
else:
|
|
|
return "%s://%s-%s" % (transport, ip, port)
|
|
|
|
|
|
def _create_connected_socket(self, channel, identity=None):
|
|
|
"""Create a zmq Socket and connect it to the kernel."""
|
|
|
url = self._make_url(channel)
|
|
|
socket_type = channel_socket_types[channel]
|
|
|
self.log.info("Connecting to: %s" % url)
|
|
|
sock = self.context.socket(socket_type)
|
|
|
if identity:
|
|
|
sock.identity = identity
|
|
|
sock.connect(url)
|
|
|
return sock
|
|
|
|
|
|
def connect_iopub(self, identity=None):
|
|
|
"""return zmq Socket connected to the IOPub channel"""
|
|
|
sock = self._create_connected_socket('iopub', identity=identity)
|
|
|
sock.setsockopt(zmq.SUBSCRIBE, b'')
|
|
|
return sock
|
|
|
|
|
|
def connect_shell(self, identity=None):
|
|
|
"""return zmq Socket connected to the Shell channel"""
|
|
|
return self._create_connected_socket('shell', identity=identity)
|
|
|
|
|
|
def connect_stdin(self, identity=None):
|
|
|
"""return zmq Socket connected to the StdIn channel"""
|
|
|
return self._create_connected_socket('stdin', identity=identity)
|
|
|
|
|
|
def connect_hb(self, identity=None):
|
|
|
"""return zmq Socket connected to the Heartbeat channel"""
|
|
|
return self._create_connected_socket('hb', identity=identity)
|
|
|
|
|
|
def connect_control(self, identity=None):
|
|
|
"""return zmq Socket connected to the Heartbeat channel"""
|
|
|
return self._create_connected_socket('control', identity=identity)
|
|
|
|
|
|
|
|
|
__all__ = [
|
|
|
'write_connection_file',
|
|
|
'get_connection_file',
|
|
|
'find_connection_file',
|
|
|
'get_connection_info',
|
|
|
'connect_qtconsole',
|
|
|
'tunnel_to_kernel',
|
|
|
]
|
|
|
|
