Python monitoring host is alive, and send alarm messages

  Use python to write a simple test whether the survival of the host script, which is not suitable for online use, because network latency, packet loss can cause a false positive messages, then the judge three subsequent updates of ping nowhere and then send alarm messages, and enable multi-threaded deal with.

#!/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 = "[email protected]" #邮件收件人 mail_from = "[email protected]" #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)

 

# Run directly

# python ping.py 

Ping 192.168.18.10 successful.

Ping 192.168.18.11 successful.

Ping 192.168.18.12 successful.

Sleep 10s...