Python监控主机是否存活并以邮件报警

利用Python写了简单测试主机是否存活脚本，此脚本不适于线上使用，因为网络延迟、丢包现象会造成误报邮件，那么后续会更新判断三次ping不通后再发报警邮件，并启用多线程处理。

    #!/usr/bin/env python 
    # coding:UTF-8 
    import time 
    import pexpect 
    import smtplib 
    from email.mime.text import MIMEText 
    mail_host = "smtp.163.com"    #定义smtp服务器 
    mail_to = "baojingtongzhi@163.com" #邮件收件人 
    mail_from = "monitor@163.com"   #邮件发件人 
    mail_pass = "123456"      #邮件发件人邮箱密码 
    while True: 
      def Mail(error_ip): 
        date = time.strftime('%Y-%m-%d %H:%M:%S') 
        msg = MIMEText("%s Ping %s failed from 255.252." % (date, error_ip)) 
        msg['Subject'] = "Ping %s failed." % error_ip  #定义邮件主题 
        msg['From'] = mail_from 
        msg['To'] = mail_to 
        try: 
          s = smtplib.SMTP()        #创建一个SMTP()对象 
          s.connect(mail_host, "25")      #通过connect方法连接smtp主机 
          s.starttls()          #启动安全传输模式 
          s.login(mail_from,mail_pass)     #邮箱账户登录认证 
          s.sendmail(mail_from, mail_to, msg.as_string()) #邮件发送 
          s.quit()   #断开smtp连接 
        except Exception, e: 
          print str(e) 
      ip_list = ['192.168.18.10', 
        '192.168.18.11', 
        '192.168.18.12'] 
      for ip in ip_list: 
        ping = pexpect.spawn('ping -c 1 %s' % ip) 
        check = ping.expect([pexpect.TIMEOUT,"1 packets transmitted, 1 received, 0% packet loss"],2)  #2代表超时时间 
        if check == 0: 
          Mail(ip) 
          print "Ping %s failed,Have email." % ip 
        if check == 1: 
          print "Ping %s successful." % ip 
      print "Sleep 10s..."
      time.sleep(10)
    #直接运行
    # python ping.py 
    Ping 192.168.18.10 successful.
    Ping 192.168.18.11 successful.
    Ping 192.168.18.12 successful.
    Sleep 10s...

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