|
|
"""Utilities for connecting to kernels
|
|
|
|
|
|
Authors:
|
|
|
|
|
|
* Min Ragan-Kelley
|
|
|
|
|
|
"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 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.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
import glob
|
|
|
import json
|
|
|
import os
|
|
|
import sys
|
|
|
from getpass import getpass
|
|
|
from subprocess import Popen, PIPE
|
|
|
|
|
|
# external imports
|
|
|
from IPython.external.ssh import tunnel
|
|
|
|
|
|
# IPython imports
|
|
|
from IPython.core.profiledir import ProfileDir
|
|
|
from IPython.utils.path import filefind, get_ipython_dir
|
|
|
from IPython.utils.py3compat import str_to_bytes
|
|
|
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Functions
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
def get_connection_file(app=None):
|
|
|
"""Return the path to the connection file of an app
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
app : KernelApp instance [optional]
|
|
|
If unspecified, the currently running app will be used
|
|
|
"""
|
|
|
if app is None:
|
|
|
from IPython.zmq.kernelapp import KernelApp
|
|
|
if not KernelApp.initialized():
|
|
|
raise RuntimeError("app not specified, and not in a running Kernel")
|
|
|
|
|
|
app = KernelApp.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.frontend.qt.console import qtconsoleapp",
|
|
|
"qtconsoleapp.main()"
|
|
|
])
|
|
|
|
|
|
return Popen([sys.executable, '-c', cmd, '--existing', cf] + argv, stdout=PIPE, stderr=PIPE)
|
|
|
|
|
|
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)
|
|
|
|
|
|
|
|
|
|
