python 多线程实现检测服务器在线情况

#!/usr/bin/python#coding=utf-8'''Created on 2015-8-4@author: Administrator'''import threading,subprocessfrom time import ctime,sleep,timeimport Queuequeue=Queue.Queue()class ThreadUrl(threading.Thread):  def __init__(self,queue):    threading.Thread.__init__(self)    self.queue=queue  def run(self):    while True:      host=self.queue.get()      ret=subprocess.call('ping -c 1 -w 1 '+host,shell=True,stdout=open('/dev/null','w'))      if ret:        print "%s is down" % host      else:        print "%s is up" % host      self.queue.task_done()def main():  for i in range(100):    t=ThreadUrl(queue)    t.setDaemon(True)    t.start()  for host in b:    queue.put(host)  queue.join()a=[]with open('ip.txt') as f:  for line in f.readlines():    a.append(line.split()[0])  #print ab=['192.168.3.'+str(x) for x in range(1,254)] #ping 192.168.3 网段start=time()main()print "Elasped Time:%s" % (time()-start)#t2=threading.Thread(target=move,args=('fff',))#threads.append(t2)'''for i in a:  print ctime()  ping(i)  sleep(1)if __name__ == '__main__':  for t in range(len(a)):    #t.setDaemon(True)    threads[t].start()    #t.join()  print "All over %s" % ctime()'''

#!/usr/bin/python# encoding=utf-8# Filename: net_is_normal.pyimport osimport socketimport subprocess  #判断网络是否正常server='www.baidu.com'#检测服务器是否能ping通，在程序运行时，会在标准输出中显示命令的运行信息def pingServer(server):  result=os.system('ping '+server+' -c 2')  if result:    print '服务器%s ping fail' % server  else:    print '服务器%s ping ok' % server  print result #把程序输出定位到/dev/null,否则会在程序运行时会在标准输出中显示命令的运行信息 def pingServerCall(server):  fnull = open(os.devnull, 'w')  result = subprocess.call('ping '+server+' -c 2', shell = True, stdout = fnull, stderr = fnull)  if result:    print '服务器%s ping fail' % server  else:    print '服务器%s ping ok' % server  fnull.close()   #可用于检测程序是否正常，如检测redis是否正常，即检测redis的6379端口是否正常#检测ssh是否正常，即检测ssh的22端口是否正常def check_aliveness(ip, port):  sk = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  sk.settimeout(1)  try:    sk.connect((ip,port))    print 'server %s %d service is OK!' %(ip,port)    return True  except Exception:    print 'server %s %d service is NOT OK!' %(ip,port)    return False  finally:    sk.close()  return False   if __name__=='__main__':  pingServerCall(server)  pingServer(server)  check_aliveness('192.168.230.128', 6379)