python 多線程實現檢測伺服器線上情況

需要ping一個網段所有機器的線上情況，shell腳步已耗用時間太長，用python寫個多線程ping吧，代碼如下：

#!/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 網段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()'''

效果如下：

平一個網段只要2.7s左右，夠快！！！

再給大家分享一個檢測外網伺服器的方法及代碼

經常使用python檢測伺服器是否能ping通, 程式是否正常運行（檢測對應的連接埠是否正常）

以前使用shell指令碼的寫法如下：

PINGRET=$( ping www.baidu.com -c 2 | grep "icmp_" ); if [ -z $PINGRET ]; then echo "ping fail"; else echo "ping ok"; fi

或者

ping -c 2 www.baidu.com|grep "icmp_" && echo 'ping ok' || echo 'ping fail'

程式碼範例：

#!/usr/bin/python# encoding=utf-8# Filename: net_is_normal.pyimport osimport socketimport subprocess  #判斷網路是否正常server='www.baidu.com'#檢測伺服器是否能ping通，在程式運行時，會在標準輸出中顯示命令的運行資訊def pingServer(server):  result=os.system('ping '+server+' -c 2')  if result:    print '伺服器%s ping fail' % server  else:    print '伺服器%s ping ok' % server  print result #把程式輸出定位到/dev/null,否則會在程式運行時會在標準輸出中顯示命令的運行資訊 def pingServerCall(server):  fnull = open(os.devnull, 'w')  result = subprocess.call('ping '+server+' -c 2', shell = True, stdout = fnull, stderr = fnull)  if result:    print '伺服器%s ping fail' % server  else:    print '伺服器%s ping ok' % server  fnull.close()   #可用於檢測程式是否正常，如檢測redis是否正常，即檢測redis的6379連接埠是否正常#檢測ssh是否正常，即檢測ssh的22連接埠是否正常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)

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