Use Python socketserver to write time synchronization between server and client

Because NTP often times out, so I wrote a simple time synchronization server, the client will synchronize the service side of the system time:

Service side:

#!/usr/local/python27/bin/python#coding:utf-8import timeimport loggingimport socketserverimport  structfrom daemonize import DaemonizeSERVER_HOST =  ' 0.0.0.0 ' server_port =  37123BUF_SIZE = 1024pid =  '/tmp/timeserver.pid ' Logger = logging.getlogger ( ' MyLogger ') logger.setlevel (logging. DEBUG) fh = logging. Filehandler (' TimeServer.log ') fh.setlevel (logging. DEBUG) formatter = logging. Formatter ('% (asctime) s - % (name) s - % (levelname) s - % (message) s ') Fh.setformatter (formatter) Logger.addhandler (FH) Keep_fds = [fh.stream.fileno ()]class threadedtcprequesthandler ( Socketserver.baserequesthandler):     def handle (self):         while true:            try:                  data = self.request.recv (buf_size)                  if not data:                     break                 logger.info ("Received: IP:% s message: %s " %  (self.client_address[0], data)                  i1, i2, message =  Struct.unpack ('!2b8s ',  data)                  if i1 == 3 and i2 == 7 and message = =  ' Get_time ':                     cur_time&nbsP;= int (Time.time ())                      response = struct.pack (' >2bi ',  i1, i2, cur_ Time)                      self.request.sendall (response)                      logger.info ("send: ip:%s message: % S " %  (self.client_address[0], cur_time))                  else:                     logger.error ("message error!")             except Exception, e:        &nbsP;        logger.error ("Error encountered:"  + str (e))                  break    def  finish (self):         self.request.close () class  Threadedtcpserver (socketserver.threadingmixin, socketserver.tcpserver):     passdef  main ():     server = threadedtcpserver ((Server_host, server_port),  threadedtcprequesthandler)     print  "server loop running ..."      server.serve_forever () #main () daemon = daemonize (app= "Timeserver",  pid=pid,  action=main, keep_fds=keep_fds) Daemon.start ()

Daemonize This is a third-party module, you can turn the script into a daemon, out of the terminal, detailed reference: https://pypi.python.org/pypi/daemonize/2.3.1

The struct module is to convert the data into binary, which is usually used in interaction with other programs, and I'm here to play.

Then there is nothing, just take the online demo rewrite the work function.

Client:

#!/usr/bin/python#coding:utf-8import subprocessimport socketimport timeimport sysimport  structSERVER_HOST =  ' 192.168.1.100 ' server_port = 37123buf_size = 1024def  client (Ip, port):     sock = socket.socket (Socket.AF_INET, socket . Sock_stream)     sock.connect ((ip, port))     message =  Struct.pack (' >2b8s ', 3, 7,  ' get_time ')     try:         sock.sendall (message)         response =  SOCK.RECV (buf_size)         i1, i2, cur_time =  struct.unpack ('!2bi ',  response)         formattime =  time.strftime ('%y-%m-%d %h:%m:%s ',  time.localtime (int (cur_time)))          ret&nbsP;= subprocess.call ('  date -s  '%s '   '  % formattime, shell=true)         print  "client received: %s format: %s " %  (response, formattime)     except Exception, e:         print  "encountered error:"  + str (e)          sys.exit (2)     else:        sock.close ()         return retif __name__ ==  "__main__":     client (Server_host, server_port)

The client is simpler, connect directly to the server with the socket, and then modify the local time after getting the message.

This article is from the "Operations Notes" blog, make sure to keep this source http://lihuipeng.blog.51cto.com/3064864/1619797

Use Python socketserver to write time synchronization between server and client