Commit 75a78c9f authored by David Wilson's avatar David Wilson

ansible: connection plugin v2

Now featuring one roundtrip per module invocation.
parent f3e51a7b
# Copyright 2017, David Wilson
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its contributors
# may be used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import json
import os
import ansible
import ansible.plugins
import ansible.plugins.action.normal
import mitogen.ansible.helpers
ANSIBLE_BASEDIR = os.path.dirname(ansible.__file__)
class ActionModule(ansible.plugins.action.normal.ActionModule):
def get_py_module_name(self, module_name):
path = ansible.plugins.module_loader.find_plugin(module_name, '')
relpath = os.path.relpath(path, ANSIBLE_BASEDIR)
root, _ = os.path.splitext(relpath)
return 'ansible.' + root.replace('/', '.')
def _execute_module(self, module_name=None, module_args=None, tmp=None,
task_vars=None, persist_files=False,
delete_remote_tmp=True, wrap_async=False):
module_name = module_name or self._task.action
module_args = module_args or self._task.args
task_vars = task_vars or {}
self._update_module_args(module_name, module_args, task_vars)
#####################################################################
py_module_name = self.get_py_module_name(module_name)
js = self._connection.py_call(mitogen.ansible.helpers.run_module, py_module_name,
args=json.loads(json.dumps(module_args)))
#####################################################################
data = self._parse_returned_data({
'rc': 0,
'stdout': js,
'stdout_lines': [js],
'stderr': ''
})
if wrap_async:
data['changed'] = True
# pre-split stdout/stderr into lines if needed
if 'stdout' in data and 'stdout_lines' not in data:
# if the value is 'False', a default won't catch it.
txt = data.get('stdout', None) or u''
data['stdout_lines'] = txt.splitlines()
if 'stderr' in data and 'stderr_lines' not in data:
# if the value is 'False', a default won't catch it.
txt = data.get('stderr', None) or u''
data['stderr_lines'] = txt.splitlines()
return data
......@@ -43,8 +43,7 @@ Enable it by:
"""
import mitogen.master
import mitogen.ssh
import mitogen.utils
import mitogen.unix
from mitogen.ansible import helpers
import ansible.errors
......@@ -52,7 +51,7 @@ import ansible.plugins.connection
class Connection(ansible.plugins.connection.ConnectionBase):
broker = None
router = None
context = None
become_methods = []
......@@ -60,35 +59,35 @@ class Connection(ansible.plugins.connection.ConnectionBase):
@property
def connected(self):
return self.broker is not None
return self.router is not None
def _connect(self):
if self.connected:
return
self.broker = mitogen.master.Broker()
self.router = mitogen.master.Router(self.broker)
if self._play_context.remote_addr == 'localhost':
self.context = self.router.connect(mitogen.master.Stream)
else:
self.context = self.router.connect(mitogen.ssh.Stream,
hostname=self._play_context.remote_addr,
)
self.router, self.parent = mitogen.unix.connect('/tmp/mitosock')
self.context = mitogen.service.call(self.parent, 500, {
'hostname': self._play_context.remote_addr,
})
def py_call(self, func, *args, **kwargs):
self._connect()
return self.context.call(func, *args, **kwargs)
def exec_command(self, cmd, in_data=None, sudoable=True):
super(Connection, self).exec_command(cmd, in_data=in_data, sudoable=sudoable)
if in_data:
raise ansible.errors.AnsibleError("does not support module pipelining")
return self.context.call(helpers.exec_command, cmd, in_data)
return self.py_call(helpers.exec_command, cmd, in_data)
def fetch_file(self, in_path, out_path):
output = self.context.call(helpers.read_path, in_path)
output = self.py_call(helpers.read_path, in_path)
helpers.write_path(out_path, output)
def put_file(self, in_path, out_path):
self.context.call(helpers.write_path, out_path,
self.py_call(helpers.write_path, out_path,
helpers.read_path(in_path))
def close(self):
self.broker.shutdown()
self.broker.join()
self.router.broker.shutdown()
self.router.broker.join()
......@@ -121,7 +121,7 @@ def run_module(module, raw_params=None, args=None):
# invocation, so we need to invoke main explicitly.
mod.main()
except Exit, e:
return e.dct
return json.dumps(e.dct)
def exec_command(cmd, in_data=None):
......
# Copyright 2017, David Wilson
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its contributors
# may be used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import mitogen
import mitogen.master
import mitogen.service
import mitogen.unix
import mitogen.utils
import mitogen.ansible.action
import ansible.errors
import ansible.plugins.strategy.linear
from ansible.plugins import action_loader
class ContextProxyService(mitogen.service.Service):
well_known_id = 500
max_message_size = 1000
def __init__(self, router):
super(ContextProxyService, self).__init__(router)
self._context_by_id = {}
def validate_args(self, args):
return (isinstance(args, dict) and
isinstance(args.get('hostname'), basestring))
def dispatch(self, dct, msg):
key = repr(sorted(dct.items()))
if key not in self._context_by_id:
self._context_by_id[key] = self.router.ssh(**dct)
return self._context_by_id[key]
class StrategyModule(ansible.plugins.strategy.linear.StrategyModule):
def run(self, *args, **kwargs):
self.router = mitogen.master.Router()
self.listener = mitogen.unix.Listener(self.router, path='/tmp/mitosock')
self.service = ContextProxyService(self.router)
mitogen.utils.log_to_file()
import threading
th = threading.Thread(target=self.service.run)
th.setDaemon(True)
th.start()
real_get = action_loader.get
def get(name, *args, **kwargs):
if name == 'normal':
return mitogen.ansible.action.ActionModule(*args, **kwargs)
return real_get(name, *args, **kwargs)
action_loader.get = get
try:
return super(StrategyModule, self).run(*args, **kwargs)
finally:
self.router.broker.shutdown()
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