class Service(ChromaService):
def __init__(self):
super(Service, self).__init__()
self.threads = []
self._children_started = threading.Event()
self._complete = threading.Event()
def run(self):
from chroma_core.services.power_control.manager import PowerControlManager
from chroma_core.services.power_control.monitor_daemon import PowerMonitorDaemon
from chroma_core.services.power_control.rpc import PowerControlRpc
super(Service, self).run()
manager = PowerControlManager()
monitor_daemon = PowerMonitorDaemon(manager)
self._rpc_thread = ServiceThread(PowerControlRpc(manager))
self._monitor_daemon_thread = ServiceThread(monitor_daemon)
self._rpc_thread.start()
self._monitor_daemon_thread.start()
self._children_started.set()
self._complete.wait()
def stop(self):
super(Service, self).stop()
# Guard against trying to stop after child threads are created, but before they are started.
self._children_started.wait()
self.log.info("Stopping...")
self._rpc_thread.stop()
self._monitor_daemon_thread.stop()
self.log.info("Joining...")
self._rpc_thread.join()
self._monitor_daemon_thread.join()
self.log.info("Complete.")
self._complete.set()
class Service(ChromaService):
def __init__(self):
super(Service, self).__init__()
self._children_started = threading.Event()
self._complete = threading.Event()
def run(self):
from chroma_core.services.job_scheduler.job_scheduler import JobScheduler
from chroma_core.services.job_scheduler.job_scheduler_client import JobSchedulerRpc
from chroma_core.services.job_scheduler.agent_rpc import AgentRpc
super(Service, self).run()
# Cancel anything that's left behind from a previous run
for command in Command.objects.filter(complete=False):
command.completed(True, True)
Job.objects.filter(~Q(state="complete")).update(state="complete", cancelled=True)
self._job_scheduler = JobScheduler()
self._queue_thread = ServiceThread(QueueHandler(self._job_scheduler))
self._rpc_thread = ServiceThread(JobSchedulerRpc(self._job_scheduler))
self._progress_thread = ServiceThread(self._job_scheduler.progress)
AgentRpc.start()
self._queue_thread.start()
self._rpc_thread.start()
self._progress_thread.start()
self._children_started.set()
self._mail_alerts_thread = MailAlerts(settings.EMAIL_SENDER, settings.EMAIL_SUBJECT_PREFIX, settings.EMAIL_HOST)
self._mail_alerts_thread.start()
self._complete.wait()
self.log.info("Cancelling outstanding jobs...")
for job in Job.objects.filter(~Q(state="complete")).order_by("-id"):
self._job_scheduler.cancel_job(job.id)
def stop(self):
from chroma_core.services.job_scheduler.agent_rpc import AgentRpc
super(Service, self).stop()
# Guard against trying to stop after child threads are created, but before they are started
self._children_started.wait()
AgentRpc.shutdown()
self.log.info("Stopping...")
self._rpc_thread.stop()
self._queue_thread.stop()
self._progress_thread.stop()
self._mail_alerts_thread.stop()
self.log.info("Joining...")
self._rpc_thread.join()
self._queue_thread.join()
self._job_scheduler.join_run_threads()
self._progress_thread.join()
self._mail_alerts_thread.join()
self.log.info("Complete.")
self._complete.set()
def run(self):
super(Service, self).run()
self.amqp_tx_forwarder = AmqpTxForwarder(self.queues)
self.amqp_rx_forwarder = AmqpRxForwarder(self.queues)
# This thread listens to an AMQP queue and appends incoming messages
# to queues for retransmission to agents
tx_svc_thread = ServiceThread(self.amqp_tx_forwarder)
# This thread listens to local queues and appends received messages
# to an AMQP queue
rx_svc_thread = ServiceThread(self.amqp_rx_forwarder)
rx_svc_thread.start()
tx_svc_thread.start()
# FIXME: this TERMINATE_ALL format could in principle
# be passed back from the agent (but it should never
# originate there), affecting sessions for other agents.
# At restart, message receiving services to clear out any
# existing session state (from a previous instance of this
# service).
for plugin in ["action_runner"]:
self.queues.receive({
"fqdn": None,
"type": "SESSION_TERMINATE_ALL",
"plugin": plugin,
"session_id": None,
"session_seq": None,
"body": None,
})
# This thread services session management RPCs, so that other
# services can explicitly request a session reset
session_rpc_thread = ServiceThread(HttpAgentRpc(self))
session_rpc_thread.start()
# Hook up the request handler
MessageView.queues = self.queues
MessageView.sessions = self.sessions
MessageView.hosts = self.hosts
ValidatedClientView.valid_certs = self.valid_certs
# The thread for generating HostOfflineAlerts
host_checker_thread = ServiceThread(
HostStatePoller(self.hosts, self.sessions))
host_checker_thread.start()
# The main thread serves incoming requests to exchanges messages
# with agents, until it is interrupted (gevent handles signals for us)
self.server = wsgi.WSGIServer(("", HTTP_AGENT_PORT), WSGIHandler())
self.server.serve_forever()
session_rpc_thread.stop()
tx_svc_thread.stop()
rx_svc_thread.stop()
host_checker_thread.stop()
session_rpc_thread.join()
tx_svc_thread.join()
rx_svc_thread.join()
host_checker_thread.join()
def _execute_inner(self, *args, **options):
if options['verbose']:
log_enable_stdout()
if options['gevent']:
from gevent.monkey import patch_all
patch_all(thread=True)
# Gevent's implementation of select removes 'poll'
import subprocess
subprocess._has_poll = False
import django.db
django.db.connections._connections = threading.local()
if options['trace']:
class Trace(object):
def __init__(self):
self.tracefile = open('trace.log', 'w', buffering=0)
self.tracefile.write("Started at %s: %s %s\n" %
(IMLDateTime.utcnow(), args, options))
def __call__(self, frame, event, arg):
if event == "line":
try:
pyfile = frame.f_globals['__file__'].strip('co')
line = linecache.getline(pyfile, frame.f_lineno)
except KeyError:
pass
else:
if line is not None:
self.tracefile.write(
"%s:%s %s" %
(pyfile, frame.f_lineno, line))
return self
chroma_core.services.log.trace = Trace()
sys.settrace(chroma_core.services.log.trace)
from chroma_core.lib.service_config import ServiceConfig
if not ServiceConfig().configured():
# FIXME: return an error code which will prevent supervisord from restarting this service
# (using the 'exitcodes' option for the programs in the supervisord conf)
sys.stderr.write(
"Chroma is not configured, please run chroma-config setup first\n"
)
sys.exit(-1)
if not options['lightweight_rpc']:
RpcClientFactory.initialize_threads()
log_set_filename("%s.log" % options['name'])
# Respond to Ctrl+C
stopped = threading.Event()
# Ensure that threads are .start()ed before we possibly try to .join() them
setup_complete = threading.Event()
def signal_handler(*args, **kwargs):
"""Params undefined because gevent vs. threading pass
different things to handler
"""
if not setup_complete.is_set():
log.warning("Terminated during setup, exiting hard")
os._exit(0)
if not options['lightweight_rpc']:
RpcClientFactory.shutdown_threads()
for service_thread in service_mains:
log.info("Stopping %s" % service_thread.service.name)
service_thread.service.stop()
for service_thread in service_mains:
log.info("Joining %s" % service_thread.service.name)
service_thread.join()
stopped.set()
if options['gevent']:
import gevent
gevent.signal(signal.SIGINT, signal_handler)
gevent.signal(signal.SIGTERM, signal_handler)
else:
signal.signal(signal.SIGINT, signal_handler)
signal.signal(signal.SIGTERM, signal_handler)
service_mains = []
for service_name in args:
module_path = "chroma_core.services.%s" % service_name
# Load the module
mod = __import__(module_path)
components = module_path.split('.')
for comp in components[1:]:
mod = getattr(mod, comp)
service = getattr(mod, 'Service')()
service.log = log_register(service.name)
service_thread = ServiceThread(service)
service_thread.start()
service_mains.append(service_thread)
setup_complete.set()
while not stopped.is_set():
# Using a timeout changes the behaviour of CPython's waiting so that it will
# receive signals (like ctrl-c SIGINT) immediately -- logically we don't want
# any timeout here, but a pure wait() breaks ctrl-c.
stopped.wait(10)
if len(threading.enumerate()) > 1 and not options['gevent']:
log.error("Rogue thread still running, exiting hard")
log.error([t.name for t in threading.enumerate()])
os._exit(-1)