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127 lines
4.9 KiB
Python
127 lines
4.9 KiB
Python
# Copyright 2017, David Wilson
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice, this
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# list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# 3. Neither the name of the copyright holder nor the names of its contributors
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# may be used to endorse or promote products derived from this software without
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# specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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from __future__ import absolute_import
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import os
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import mitogen
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import mitogen.master
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import mitogen.service
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import mitogen.unix
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import mitogen.utils
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import ansible.errors
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import ansible.plugins.strategy.linear
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import ansible.plugins
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import ansible_mitogen.mixins
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def wrap_action_loader__get(name, *args, **kwargs):
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"""
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Trap calls to the action plug-in loader, supplementing the type of any
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ActionModule with Mitogen's ActionModuleMixin before constructing it,
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causing the mix-in methods to override any inherited from Ansible's base
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class, replacing most shell use with pure Python equivalents.
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This is preferred to static subclassing as it generalizes to third party
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action modules existing outside the Ansible tree.
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"""
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klass = action_loader__get(name, class_only=True)
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if klass:
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wrapped_name = 'MitogenActionModule_' + name
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bases = (ansible_mitogen.mixins.ActionModuleMixin, klass)
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adorned_klass = type(name, bases, {})
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return adorned_klass(*args, **kwargs)
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action_loader__get = ansible.plugins.action_loader.get
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ansible.plugins.action_loader.get = wrap_action_loader__get
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class ContextProxyService(mitogen.service.Service):
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"""
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Implement a service accessible from worker processes connecting back into
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the top-level process. The service yields an existing context matching a
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connection configuration if it exists, otherwise it constructs a new
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conncetion before returning it.
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"""
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well_known_id = 500
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max_message_size = 1000
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def __init__(self, router):
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super(ContextProxyService, self).__init__(router)
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self._context_by_key = {}
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def validate_args(self, args):
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return isinstance(args, dict)
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def dispatch(self, dct, msg):
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key = repr(sorted(dct.items()))
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if key not in self._context_by_key:
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method = getattr(self.router, dct.pop('method'))
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self._context_by_key[key] = method(**dct)
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return self._context_by_key[key]
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class StrategyModule(ansible.plugins.strategy.linear.StrategyModule):
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def __init__(self, *args, **kwargs):
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super(StrategyModule, self).__init__(*args, **kwargs)
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self.add_connection_plugin_path()
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def add_connection_plugin_path(self):
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"""
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Automatically add the connection plug-in directory to the ModuleLoader
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path, slightly reduces end-user configuration.
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"""
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# ansible_mitogen base directory:
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basedir = os.path.dirname(os.path.dirname(__file__))
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conn_dir = os.path.join(basedir, 'connection')
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ansible.plugins.connection_loader.add_directory(conn_dir)
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def run(self, iterator, play_context, result=0):
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self.router = mitogen.master.Router()
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self.router.responder.whitelist_prefix('ansible')
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self.router.responder.whitelist_prefix('ansible_mitogen')
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self.listener = mitogen.unix.Listener(self.router)
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os.environ['LISTENER_SOCKET_PATH'] = self.listener.path
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self.service = ContextProxyService(self.router)
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mitogen.utils.log_to_file()#level='DEBUG', io=False)
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if play_context.connection == 'ssh':
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play_context.connection = 'mitogen'
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import threading
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th = threading.Thread(target=self.service.run)
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th.setDaemon(True)
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th.start()
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try:
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return super(StrategyModule, self).run(iterator, play_context)
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finally:
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self.router.broker.shutdown()
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os.unlink(self.listener.path)
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