def start(self, shutdown_events=True, http_server=True):
"""
Internal code which starts the agent, registers it with the master,
and performs the other steps necessary to get things running.
:param bool shutdown_events:
If True register all shutdown events so certain actions, such as
information the master we're going offline, can take place.
:param bool http_server:
If True then construct and serve the externally facing http
server.
"""
if config["agent_manhole"]:
self._start_manhole(config["agent_manhole_port"],
config["agent_manhole_username"],
config["agent_manhole_password"])
# setup the internal http server so external entities can
# interact with the service.
if http_server:
self._start_http_api(config["agent_api_port"])
# Update the configuration with this pid (which may be different
# than the original pid).
config["pids"].update(child=os.getpid())
# get ready to 'publish' the agent
config.register_callback(
"agent_id",
partial(
self.callback_agent_id_set, shutdown_events=shutdown_events))
return self.post_agent_to_master()
def __init__(self):
# so parts of this instance are accessible elsewhere
assert "agent" not in config
config["agent"] = self
self.services = {}
self.register_shutdown_events = False
self.last_free_ram_post = time.time()
self.repeating_call_counter = {}
self.shutdown_timeout = None
self.post_shutdown_lock = DeferredLock()
self.stop_lock = DeferredLock()
self.reannounce_lock = utility.TimedDeferredLock()
self.stopped = False
# Register a callback so self.shutdown_timeout is set when
# "shutting_down" is set or modified.
config.register_callback(
"shutting_down", self.callback_shutting_down_changed)