|
|
#!/usr/bin/env python
|
|
|
# encoding: utf-8
|
|
|
"""
|
|
|
The IPython cluster directory
|
|
|
"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2008-2009 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 with_statement
|
|
|
|
|
|
import os
|
|
|
import shutil
|
|
|
import sys
|
|
|
|
|
|
from twisted.python import log
|
|
|
|
|
|
from IPython.core import release
|
|
|
from IPython.config.loader import PyFileConfigLoader
|
|
|
from IPython.core.application import Application
|
|
|
from IPython.core.component import Component
|
|
|
from IPython.utils.traitlets import Unicode, Bool
|
|
|
from IPython.utils import genutils
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
class ClusterDirError(Exception):
|
|
|
pass
|
|
|
|
|
|
|
|
|
class PIDFileError(Exception):
|
|
|
pass
|
|
|
|
|
|
|
|
|
class ClusterDir(Component):
|
|
|
"""An object to manage the cluster directory and its resources.
|
|
|
|
|
|
The cluster directory is used by :command:`ipcontroller`,
|
|
|
:command:`ipcontroller` and :command:`ipcontroller` to manage the
|
|
|
configuration, logging and security of these applications.
|
|
|
|
|
|
This object knows how to find, create and manage these directories. This
|
|
|
should be used by any code that want's to handle cluster directories.
|
|
|
"""
|
|
|
|
|
|
security_dir_name = Unicode('security')
|
|
|
log_dir_name = Unicode('log')
|
|
|
pid_dir_name = Unicode('pid')
|
|
|
security_dir = Unicode(u'')
|
|
|
log_dir = Unicode(u'')
|
|
|
pid_dir = Unicode(u'')
|
|
|
location = Unicode(u'')
|
|
|
|
|
|
def __init__(self, location):
|
|
|
super(ClusterDir, self).__init__(None)
|
|
|
self.location = location
|
|
|
|
|
|
def _location_changed(self, name, old, new):
|
|
|
if not os.path.isdir(new):
|
|
|
os.makedirs(new)
|
|
|
self.security_dir = os.path.join(new, self.security_dir_name)
|
|
|
self.log_dir = os.path.join(new, self.log_dir_name)
|
|
|
self.pid_dir = os.path.join(new, self.pid_dir_name)
|
|
|
self.check_dirs()
|
|
|
|
|
|
def _log_dir_changed(self, name, old, new):
|
|
|
self.check_log_dir()
|
|
|
|
|
|
def check_log_dir(self):
|
|
|
if not os.path.isdir(self.log_dir):
|
|
|
os.mkdir(self.log_dir)
|
|
|
|
|
|
def _security_dir_changed(self, name, old, new):
|
|
|
self.check_security_dir()
|
|
|
|
|
|
def check_security_dir(self):
|
|
|
if not os.path.isdir(self.security_dir):
|
|
|
os.mkdir(self.security_dir, 0700)
|
|
|
os.chmod(self.security_dir, 0700)
|
|
|
|
|
|
def _pid_dir_changed(self, name, old, new):
|
|
|
self.check_pid_dir()
|
|
|
|
|
|
def check_pid_dir(self):
|
|
|
if not os.path.isdir(self.pid_dir):
|
|
|
os.mkdir(self.pid_dir, 0700)
|
|
|
os.chmod(self.pid_dir, 0700)
|
|
|
|
|
|
def check_dirs(self):
|
|
|
self.check_security_dir()
|
|
|
self.check_log_dir()
|
|
|
self.check_pid_dir()
|
|
|
|
|
|
def load_config_file(self, filename):
|
|
|
"""Load a config file from the top level of the cluster dir.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
filename : unicode or str
|
|
|
The filename only of the config file that must be located in
|
|
|
the top-level of the cluster directory.
|
|
|
"""
|
|
|
loader = PyFileConfigLoader(filename, self.location)
|
|
|
return loader.load_config()
|
|
|
|
|
|
def copy_config_file(self, config_file, path=None, overwrite=False):
|
|
|
"""Copy a default config file into the active cluster directory.
|
|
|
|
|
|
Default configuration files are kept in :mod:`IPython.config.default`.
|
|
|
This function moves these from that location to the working cluster
|
|
|
directory.
|
|
|
"""
|
|
|
if path is None:
|
|
|
import IPython.config.default
|
|
|
path = IPython.config.default.__file__.split(os.path.sep)[:-1]
|
|
|
path = os.path.sep.join(path)
|
|
|
src = os.path.join(path, config_file)
|
|
|
dst = os.path.join(self.location, config_file)
|
|
|
if not os.path.isfile(dst) or overwrite:
|
|
|
shutil.copy(src, dst)
|
|
|
|
|
|
def copy_all_config_files(self, path=None, overwrite=False):
|
|
|
"""Copy all config files into the active cluster directory."""
|
|
|
for f in [u'ipcontroller_config.py', u'ipengine_config.py',
|
|
|
u'ipcluster_config.py']:
|
|
|
self.copy_config_file(f, path=path, overwrite=overwrite)
|
|
|
|
|
|
@classmethod
|
|
|
def create_cluster_dir(csl, cluster_dir):
|
|
|
"""Create a new cluster directory given a full path.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
cluster_dir : str
|
|
|
The full path to the cluster directory. If it does exist, it will
|
|
|
be used. If not, it will be created.
|
|
|
"""
|
|
|
return ClusterDir(cluster_dir)
|
|
|
|
|
|
@classmethod
|
|
|
def create_cluster_dir_by_profile(cls, path, profile=u'default'):
|
|
|
"""Create a cluster dir by profile name and path.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
path : str
|
|
|
The path (directory) to put the cluster directory in.
|
|
|
profile : str
|
|
|
The name of the profile. The name of the cluster directory will
|
|
|
be "cluster_<profile>".
|
|
|
"""
|
|
|
if not os.path.isdir(path):
|
|
|
raise ClusterDirError('Directory not found: %s' % path)
|
|
|
cluster_dir = os.path.join(path, u'cluster_' + profile)
|
|
|
return ClusterDir(cluster_dir)
|
|
|
|
|
|
@classmethod
|
|
|
def find_cluster_dir_by_profile(cls, ipython_dir, profile=u'default'):
|
|
|
"""Find an existing cluster dir by profile name, return its ClusterDir.
|
|
|
|
|
|
This searches through a sequence of paths for a cluster dir. If it
|
|
|
is not found, a :class:`ClusterDirError` exception will be raised.
|
|
|
|
|
|
The search path algorithm is:
|
|
|
1. ``os.getcwd()``
|
|
|
2. ``ipython_dir``
|
|
|
3. The directories found in the ":" separated
|
|
|
:env:`IPCLUSTER_DIR_PATH` environment variable.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
ipython_dir : unicode or str
|
|
|
The IPython directory to use.
|
|
|
profile : unicode or str
|
|
|
The name of the profile. The name of the cluster directory
|
|
|
will be "cluster_<profile>".
|
|
|
"""
|
|
|
dirname = u'cluster_' + profile
|
|
|
cluster_dir_paths = os.environ.get('IPCLUSTER_DIR_PATH','')
|
|
|
if cluster_dir_paths:
|
|
|
cluster_dir_paths = cluster_dir_paths.split(':')
|
|
|
else:
|
|
|
cluster_dir_paths = []
|
|
|
paths = [os.getcwd(), ipython_dir] + cluster_dir_paths
|
|
|
for p in paths:
|
|
|
cluster_dir = os.path.join(p, dirname)
|
|
|
if os.path.isdir(cluster_dir):
|
|
|
return ClusterDir(cluster_dir)
|
|
|
else:
|
|
|
raise ClusterDirError('Cluster directory not found in paths: %s' % dirname)
|
|
|
|
|
|
@classmethod
|
|
|
def find_cluster_dir(cls, cluster_dir):
|
|
|
"""Find/create a cluster dir and return its ClusterDir.
|
|
|
|
|
|
This will create the cluster directory if it doesn't exist.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
cluster_dir : unicode or str
|
|
|
The path of the cluster directory. This is expanded using
|
|
|
:func:`IPython.utils.genutils.expand_path`.
|
|
|
"""
|
|
|
cluster_dir = genutils.expand_path(cluster_dir)
|
|
|
if not os.path.isdir(cluster_dir):
|
|
|
raise ClusterDirError('Cluster directory not found: %s' % cluster_dir)
|
|
|
return ClusterDir(cluster_dir)
|
|
|
|
|
|
|
|
|
# Default command line options for IPython cluster applications.
|
|
|
cl_args = (
|
|
|
(('--ipython-dir',), dict(
|
|
|
dest='Global.ipython_dir',type=unicode,
|
|
|
help='Set to override default location of Global.ipython_dir.',
|
|
|
metavar='Global.ipython_dir') ),
|
|
|
(('-p', '--profile',), dict(
|
|
|
dest='Global.profile',type=unicode,
|
|
|
help=
|
|
|
"""The string name of the profile to be used. This determines the name
|
|
|
of the cluster dir as: cluster_<profile>. The default profile is named
|
|
|
'default'. The cluster directory is resolve this way if the
|
|
|
--cluster-dir option is not used.""",
|
|
|
metavar='Global.profile') ),
|
|
|
(('--cluster-dir',), dict(
|
|
|
dest='Global.cluster_dir',type=unicode,
|
|
|
help="""Set the cluster dir. This overrides the logic used by the
|
|
|
--profile option.""",
|
|
|
metavar='Global.cluster_dir') ),
|
|
|
(('--work-dir',), dict(
|
|
|
dest='Global.work_dir',type=unicode,
|
|
|
help='Set the working dir for the process.',
|
|
|
metavar='Global.work_dir') ),
|
|
|
(('--clean-logs',), dict(
|
|
|
dest='Global.clean_logs', action='store_true',
|
|
|
help='Delete old log flies before starting.') ),
|
|
|
(('--no-clean-logs',), dict(
|
|
|
dest='Global.clean_logs', action='store_false',
|
|
|
help="Don't Delete old log flies before starting.") ),
|
|
|
)
|
|
|
|
|
|
|
|
|
class ApplicationWithClusterDir(Application):
|
|
|
"""An application that puts everything into a cluster directory.
|
|
|
|
|
|
Instead of looking for things in the ipython_dir, this type of application
|
|
|
will use its own private directory called the "cluster directory"
|
|
|
for things like config files, log files, etc.
|
|
|
|
|
|
The cluster directory is resolved as follows:
|
|
|
|
|
|
* If the ``--cluster-dir`` option is given, it is used.
|
|
|
* If ``--cluster-dir`` is not given, the application directory is
|
|
|
resolve using the profile name as ``cluster_<profile>``. The search
|
|
|
path for this directory is then i) cwd if it is found there
|
|
|
and ii) in ipython_dir otherwise.
|
|
|
|
|
|
The config file for the application is to be put in the cluster
|
|
|
dir and named the value of the ``config_file_name`` class attribute.
|
|
|
"""
|
|
|
|
|
|
auto_create_cluster_dir = True
|
|
|
|
|
|
cl_arguments = Application.cl_arguments + cl_args
|
|
|
|
|
|
def create_default_config(self):
|
|
|
super(ApplicationWithClusterDir, self).create_default_config()
|
|
|
self.default_config.Global.profile = u'default'
|
|
|
self.default_config.Global.cluster_dir = u''
|
|
|
self.default_config.Global.work_dir = os.getcwd()
|
|
|
self.default_config.Global.log_to_file = False
|
|
|
self.default_config.Global.clean_logs = False
|
|
|
|
|
|
def find_resources(self):
|
|
|
"""This resolves the cluster directory.
|
|
|
|
|
|
This tries to find the cluster directory and if successful, it will
|
|
|
have done:
|
|
|
* Sets ``self.cluster_dir_obj`` to the :class:`ClusterDir` object for
|
|
|
the application.
|
|
|
* Sets ``self.cluster_dir`` attribute of the application and config
|
|
|
objects.
|
|
|
|
|
|
The algorithm used for this is as follows:
|
|
|
1. Try ``Global.cluster_dir``.
|
|
|
2. Try using ``Global.profile``.
|
|
|
3. If both of these fail and ``self.auto_create_cluster_dir`` is
|
|
|
``True``, then create the new cluster dir in the IPython directory.
|
|
|
4. If all fails, then raise :class:`ClusterDirError`.
|
|
|
"""
|
|
|
|
|
|
try:
|
|
|
cluster_dir = self.command_line_config.Global.cluster_dir
|
|
|
except AttributeError:
|
|
|
cluster_dir = self.default_config.Global.cluster_dir
|
|
|
cluster_dir = genutils.expand_path(cluster_dir)
|
|
|
try:
|
|
|
self.cluster_dir_obj = ClusterDir.find_cluster_dir(cluster_dir)
|
|
|
except ClusterDirError:
|
|
|
pass
|
|
|
else:
|
|
|
self.log.info('Using existing cluster dir: %s' % \
|
|
|
self.cluster_dir_obj.location
|
|
|
)
|
|
|
self.finish_cluster_dir()
|
|
|
return
|
|
|
|
|
|
try:
|
|
|
self.profile = self.command_line_config.Global.profile
|
|
|
except AttributeError:
|
|
|
self.profile = self.default_config.Global.profile
|
|
|
try:
|
|
|
self.cluster_dir_obj = ClusterDir.find_cluster_dir_by_profile(
|
|
|
self.ipython_dir, self.profile)
|
|
|
except ClusterDirError:
|
|
|
pass
|
|
|
else:
|
|
|
self.log.info('Using existing cluster dir: %s' % \
|
|
|
self.cluster_dir_obj.location
|
|
|
)
|
|
|
self.finish_cluster_dir()
|
|
|
return
|
|
|
|
|
|
if self.auto_create_cluster_dir:
|
|
|
self.cluster_dir_obj = ClusterDir.create_cluster_dir_by_profile(
|
|
|
self.ipython_dir, self.profile
|
|
|
)
|
|
|
self.log.info('Creating new cluster dir: %s' % \
|
|
|
self.cluster_dir_obj.location
|
|
|
)
|
|
|
self.finish_cluster_dir()
|
|
|
else:
|
|
|
raise ClusterDirError('Could not find a valid cluster directory.')
|
|
|
|
|
|
def finish_cluster_dir(self):
|
|
|
# Set the cluster directory
|
|
|
self.cluster_dir = self.cluster_dir_obj.location
|
|
|
|
|
|
# These have to be set because they could be different from the one
|
|
|
# that we just computed. Because command line has the highest
|
|
|
# priority, this will always end up in the master_config.
|
|
|
self.default_config.Global.cluster_dir = self.cluster_dir
|
|
|
self.command_line_config.Global.cluster_dir = self.cluster_dir
|
|
|
|
|
|
# Set the search path to the cluster directory
|
|
|
self.config_file_paths = (self.cluster_dir,)
|
|
|
|
|
|
def find_config_file_name(self):
|
|
|
"""Find the config file name for this application."""
|
|
|
# For this type of Application it should be set as a class attribute.
|
|
|
if not hasattr(self, 'config_file_name'):
|
|
|
self.log.critical("No config filename found")
|
|
|
|
|
|
def find_config_file_paths(self):
|
|
|
# Set the search path to the cluster directory
|
|
|
self.config_file_paths = (self.cluster_dir,)
|
|
|
|
|
|
def pre_construct(self):
|
|
|
# The log and security dirs were set earlier, but here we put them
|
|
|
# into the config and log them.
|
|
|
config = self.master_config
|
|
|
sdir = self.cluster_dir_obj.security_dir
|
|
|
self.security_dir = config.Global.security_dir = sdir
|
|
|
ldir = self.cluster_dir_obj.log_dir
|
|
|
self.log_dir = config.Global.log_dir = ldir
|
|
|
pdir = self.cluster_dir_obj.pid_dir
|
|
|
self.pid_dir = config.Global.pid_dir = pdir
|
|
|
self.log.info("Cluster directory set to: %s" % self.cluster_dir)
|
|
|
config.Global.work_dir = unicode(genutils.expand_path(config.Global.work_dir))
|
|
|
# Change to the working directory. We do this just before construct
|
|
|
# is called so all the components there have the right working dir.
|
|
|
self.to_work_dir()
|
|
|
|
|
|
def to_work_dir(self):
|
|
|
wd = self.master_config.Global.work_dir
|
|
|
if unicode(wd) != unicode(os.getcwd()):
|
|
|
os.chdir(wd)
|
|
|
self.log.info("Changing to working dir: %s" % wd)
|
|
|
|
|
|
def start_logging(self):
|
|
|
# Remove old log files
|
|
|
if self.master_config.Global.clean_logs:
|
|
|
log_dir = self.master_config.Global.log_dir
|
|
|
for f in os.listdir(log_dir):
|
|
|
if f.startswith(self.name + u'-') and f.endswith('.log'):
|
|
|
os.remove(os.path.join(log_dir, f))
|
|
|
# Start logging to the new log file
|
|
|
if self.master_config.Global.log_to_file:
|
|
|
log_filename = self.name + u'-' + str(os.getpid()) + u'.log'
|
|
|
logfile = os.path.join(self.log_dir, log_filename)
|
|
|
open_log_file = open(logfile, 'w')
|
|
|
else:
|
|
|
open_log_file = sys.stdout
|
|
|
log.startLogging(open_log_file)
|
|
|
|
|
|
def write_pid_file(self, overwrite=False):
|
|
|
"""Create a .pid file in the pid_dir with my pid.
|
|
|
|
|
|
This must be called after pre_construct, which sets `self.pid_dir`.
|
|
|
This raises :exc:`PIDFileError` if the pid file exists already.
|
|
|
"""
|
|
|
pid_file = os.path.join(self.pid_dir, self.name + u'.pid')
|
|
|
if os.path.isfile(pid_file):
|
|
|
pid = self.get_pid_from_file()
|
|
|
if not overwrite:
|
|
|
raise PIDFileError(
|
|
|
'The pid file [%s] already exists. \nThis could mean that this '
|
|
|
'server is already running with [pid=%s].' % (pid_file, pid)
|
|
|
)
|
|
|
with open(pid_file, 'w') as f:
|
|
|
self.log.info("Creating pid file: %s" % pid_file)
|
|
|
f.write(repr(os.getpid())+'\n')
|
|
|
|
|
|
def remove_pid_file(self):
|
|
|
"""Remove the pid file.
|
|
|
|
|
|
This should be called at shutdown by registering a callback with
|
|
|
:func:`reactor.addSystemEventTrigger`. This needs to return
|
|
|
``None``.
|
|
|
"""
|
|
|
pid_file = os.path.join(self.pid_dir, self.name + u'.pid')
|
|
|
if os.path.isfile(pid_file):
|
|
|
try:
|
|
|
self.log.info("Removing pid file: %s" % pid_file)
|
|
|
os.remove(pid_file)
|
|
|
except:
|
|
|
self.log.warn("Error removing the pid file: %s" % pid_file)
|
|
|
|
|
|
def get_pid_from_file(self):
|
|
|
"""Get the pid from the pid file.
|
|
|
|
|
|
If the pid file doesn't exist a :exc:`PIDFileError` is raised.
|
|
|
"""
|
|
|
pid_file = os.path.join(self.pid_dir, self.name + u'.pid')
|
|
|
if os.path.isfile(pid_file):
|
|
|
with open(pid_file, 'r') as f:
|
|
|
pid = int(f.read().strip())
|
|
|
return pid
|
|
|
else:
|
|
|
raise PIDFileError('pid file not found: %s' % pid_file)
|
|
|
|
