262 lines
8.3 KiB
Python
262 lines
8.3 KiB
Python
#!/usr/bin/env python
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# Copyright 2016 - Brocade Communications Systems, Inc.
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# Copyright 2018 - Extreme Networks, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import sys
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import eventlet
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eventlet.monkey_patch(
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os=True,
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select=True,
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socket=True,
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thread=False if '--use-debugger' in sys.argv else True,
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time=True)
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import os
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# If ../mistral/__init__.py exists, add ../ to Python search path, so that
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# it will override what happens to be installed in /usr/(local/)lib/python...
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POSSIBLE_TOPDIR = os.path.normpath(os.path.join(os.path.abspath(sys.argv[0]),
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os.pardir,
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os.pardir))
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if os.path.exists(os.path.join(POSSIBLE_TOPDIR, 'mistral', '__init__.py')):
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sys.path.insert(0, POSSIBLE_TOPDIR)
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from oslo_config import cfg
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from oslo_log import log as logging
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from oslo_service import service
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from mistral.api import service as api_service
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from mistral import config
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from mistral.engine import engine_server
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from mistral.event_engine import event_engine_server
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from mistral.executors import executor_server
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from mistral.notifiers import notification_server
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from mistral.rpc import base as rpc
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from mistral import version
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CONF = cfg.CONF
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SERVER_THREAD_MANAGER = None
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SERVER_PROCESS_MANAGER = None
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LOG = logging.getLogger(__name__)
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def launch_thread(server, workers=1):
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try:
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global SERVER_THREAD_MANAGER
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if not SERVER_THREAD_MANAGER:
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SERVER_THREAD_MANAGER = service.ServiceLauncher(
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CONF, restart_method='mutate')
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SERVER_THREAD_MANAGER.launch_service(server, workers=workers)
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except Exception as e:
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sys.stderr.write("ERROR: %s\n" % e)
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sys.exit(1)
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def launch_process(server, workers=1):
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try:
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global SERVER_PROCESS_MANAGER
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if not SERVER_PROCESS_MANAGER:
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SERVER_PROCESS_MANAGER = service.ProcessLauncher(
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CONF, restart_method='mutate')
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SERVER_PROCESS_MANAGER.launch_service(server, workers=workers)
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except Exception as e:
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sys.stderr.write("ERROR: %s\n" % e)
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sys.exit(1)
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def launch_executor():
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launch_thread(executor_server.get_oslo_service())
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def launch_engine():
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launch_thread(engine_server.get_oslo_service())
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def launch_event_engine():
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launch_thread(event_engine_server.get_oslo_service())
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def launch_notifier():
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launch_thread(notification_server.get_oslo_service())
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def launch_api():
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server = api_service.WSGIService('mistral_api')
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launch_process(server, workers=server.workers)
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def launch_any(options):
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for option in options:
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LAUNCH_OPTIONS[option]()
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global SERVER_PROCESS_MANAGER
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global SERVER_THREAD_MANAGER
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if SERVER_PROCESS_MANAGER:
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SERVER_PROCESS_MANAGER.wait()
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if SERVER_THREAD_MANAGER:
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SERVER_THREAD_MANAGER.wait()
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# Map cli options to appropriate functions. The cli options are
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# registered in mistral's config.py.
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LAUNCH_OPTIONS = {
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'api': launch_api,
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'engine': launch_engine,
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'executor': launch_executor,
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'event-engine': launch_event_engine,
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'notifier': launch_notifier
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}
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MISTRAL_TITLE = """
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|\\\ //| || ||
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||\\\ //|| __ || __ __ ||
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|| \\\// || || // |||||| || \\\ // \\\ ||
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|| \\/ || \\\ || || || \\\ ||
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|| || || \\\ || || || /\\\ ||
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|| || || __// ||_// || \\\__// \\\_ ||
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Mistral Workflow Service, version %s
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""" % version.version_string()
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def print_server_info():
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print(MISTRAL_TITLE)
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comp_str = ("[%s]" % ','.join(LAUNCH_OPTIONS
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if cfg.CONF.server == ['all'] else cfg.CONF.server))
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print('Launching server components %s...' % comp_str)
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def get_properly_ordered_parameters():
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"""Orders launch parameters in the right order.
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In oslo it's important the order of the launch parameters.
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if --config-file came after the command line parameters the command
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line parameters are ignored.
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So to make user command line parameters are never ignored this method
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moves --config-file to be always first.
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"""
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args = sys.argv[1:]
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for arg in sys.argv[1:]:
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if arg == '--config-file' or arg.startswith('--config-file='):
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if "=" in arg:
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conf_file_value = arg.split("=", 1)[1]
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else:
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conf_file_value = args[args.index(arg) + 1]
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args.remove(conf_file_value)
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args.remove(arg)
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args.insert(0, "--config-file")
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args.insert(1, conf_file_value)
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return args
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def override_keystone_options():
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# TODO(wxy): This function is used for keeping backward compatibility.
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# Remove it in Stein.
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auth_opts = CONF['keystone_authtoken']
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for opt, value in auth_opts.items():
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if opt in CONF['keystone']:
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default_value = auth_opts._group._opts[opt]['opt'].default
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if default_value != value != CONF['keystone'][opt]:
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LOG.warning("The config option '%s' in section "
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"[keystone_authtoken] has the same copy in "
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"[keystone]. Please add the same option to the "
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"[keystone] section to keep using it.", opt)
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CONF.set_override(opt, value, group='keystone')
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def main():
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try:
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config.parse_args(get_properly_ordered_parameters())
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print_server_info()
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logging.setup(CONF, 'Mistral')
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override_keystone_options()
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# Please refer to the oslo.messaging documentation for transport
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# configuration. The default transport for oslo.messaging is
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# rabbitMQ. The available transport drivers are listed in the
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# setup.cfg file in oslo.messaging under the entry_points section for
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# oslo.messaging.drivers. The transport driver is specified using the
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# rpc_backend option in the default section of the oslo configuration
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# file. The expected value for the rpc_backend is one of the key
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# values available for the oslo.messaging.drivers (i.e. rabbit, fake).
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# There are additional options such as ssl and credential that can be
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# specified depending on the driver. Please refer to the driver
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# implementation for those additional options. It's important to note
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# that the "fake" transport should only be used if "all" the Mistral
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# servers are launched on the same process. Otherwise, messages do not
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# get delivered if the Mistral servers are launched on different
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# processes because the "fake" transport is using an in process queue.
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rpc.get_transport()
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if cfg.CONF.server == ['all']:
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# Launch all servers.
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launch_any(LAUNCH_OPTIONS.keys())
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else:
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# Validate launch option.
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if set(cfg.CONF.server) - set(LAUNCH_OPTIONS.keys()):
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raise Exception('Valid options are all or any combination of '
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', '.join(LAUNCH_OPTIONS.keys()))
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# Launch distinct set of server(s).
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launch_any(set(cfg.CONF.server))
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except RuntimeError as excp:
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sys.stderr.write("ERROR: %s\n" % excp)
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sys.exit(1)
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# Helper method used in unit tests to reset the service launchers.
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def reset_server_managers():
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global SERVER_THREAD_MANAGER
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global SERVER_PROCESS_MANAGER
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SERVER_THREAD_MANAGER = None
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SERVER_PROCESS_MANAGER = None
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# Helper method used in unit tests to access the service launcher.
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def get_server_thread_manager():
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global SERVER_THREAD_MANAGER
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return SERVER_THREAD_MANAGER
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# Helper method used in unit tests to access the process launcher.
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def get_server_process_manager():
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global SERVER_PROCESS_MANAGER
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return SERVER_PROCESS_MANAGER
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if __name__ == '__main__':
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sys.exit(main())
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