def check_monitor_status():
context = zmq.Context()
poller = zmq.Poller()
current_monitor_index = 0
heartbeat = context.socket(zmq.REQ)
heartbeat.connect(heartbeat_servers[current_monitor_index])
poller.register(heartbeat, zmq.POLLIN)
while True:
# send heartbeat signal every x seconds
heartbeat.send("")
socks = dict(poller.poll(1 * 1000))
if socks.get(heartbeat) == zmq.POLLIN:
heartbeat.recv()
else:
print "switch monitor server"
current_monitor_index = (current_monitor_index+1) % len(monitor_servers)
poller.unregister(heartbeat)
heartbeat.setsockopt(zmq.LINGER, 0)
heartbeat.close()
heartbeat = context.socket(zmq.REQ)
heartbeat.connect(heartbeat_servers[current_monitor_index])
poller.register(heartbeat, zmq.POLLIN)
fetch_remot_monitor.change_server_addr( monitor_servers[current_monitor_index] )
time.sleep(1)
def main(): fetch_remot_monitor.change_server_addr(monitor_servers[0]) thread = threading.Thread(target=check_monitor_status, args=()) thread.start() tornado.options.parse_command_line() http_server = tornado.httpserver.HTTPServer(Application()) http_server.listen(options.port) tornado.ioloop.IOLoop.instance().start()