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These two days wrote a script for line switching, there are still some small bug, have not figured out how to change the logical structure, anyway, thinking about the hair is gone.

Requirements: 1. All users who connect to ISP are out of the game through Core01's G0swap 1, and Core02's G0Unip 1 is Shutdown status.

two。 When there is something wrong with the G0Uniq1 ray line of Core01, use a script to change the G0Uniq1 UP of Core02.

* update the code to add Wechat reminder function

The topology is shown in the following figure:

The script is as follows:

#! / usr/bin/env python3#-*-coding: utf-8-*-import timeimport reimport sysimport subprocess from sendwxInfo import * from netmiko import ConnectHandlerfrom netmiko.ssh_exception import NetMikoTimeoutException,NetMikoAuthenticationExceptiondef auth (Conn): def wrapper (ip,username,password): device = {'device_type':' cisco_ios', 'ip': ip,' username': username 'password': password,} try: connect = ConnectHandler (* * device) connect.enable () except (EOFError, NetMikoTimeoutException): print (u "network device% s: unable to connect! Please confirm whether the IPAddress of the device is reachable! " % ip) return except (EOFError, NetMikoAuthenticationException): print (u "Network device% s: wrong username and password! please confirm your account number and password!" % ip) return res = Conn (ip,username,password,connect) return res return wrapper@authdef upInterface (ip,username,password,connect): cmd = ['interface g0lemagna no shutdown'] connect.send_config_set (cmd) res = connect.send_command (' show ip int brief') connect.disconnect () @ authdef downInterface (ip,username,password,connect): cmd = ['interface g0gamma 1' 'shutdown'] connect.send_config_set (cmd) connect.disconnect () def sendInfo (): weixinInfo = WeChat (' https://qyapi.weixin.qq.com/cgi-bin') return weixinInfo def masterLogs (): filename ='/ var/log/syslog-ng/172.16.200.21/messages' file = subprocess.Popen ('tail-n 1' + filename, shell=True, stdout=subprocess.PIPE,stderr=subprocess.PIPE) masterData = str (file.stdout.readline ()) Encoding='utf-8') if re.match ('. * sla 1 state Up-> Down.*',masterData): res01 = "the device Core01's Internet connection port G0Action1 has been disconnected. Ask the administrator to confirm the business. " DownInterface ('172.16.200.21) upInterface (' 172.16.200.22) Password.123') res02 = 'Intetnet line has been switched from G0Univer 1 of Core01 to port G0 of Core02, please confirm the business.' Res03 = 'important information!' Message = "{0}\ n {1}\ n\ n {2}" .format (res03,res01,res02) info = sendInfo () info.sendMessage (message) def slaveLogs (): filename ='/ var/log/syslog-ng/172.16.200.22/messages' file = subprocess.Popen ('tail-n 1' + filename, shell=True, stdout=subprocess.PIPE,stderr=subprocess.PIPE) slaveData = str (file.stdout.readline () Encoding='utf-8') if re.match ('. * sla 1 state Up-> Down.*',slaveData): res01= "device Core02 connection to the Internet port G0Bank 1 has been disconnected Ask the administrator to confirm the business. " DownInterface ('172.16.200.22) upInterface (' 172.16.200.21) Password.123) res02='Internet lines have been switched from G0Universe 1 of Core02 to port G0ap1 of Core01. Please confirm the business.' Res03 = 'important information!' Message = "{0}\ n {1}\ n\ n {2}" .format (res03,res01,res02) info = sendInfo () info.sendMessage (message) if _ _ name__ = "_ _ main__": while True: masterLogs () time.sleep (5) slaveLogs () time.sleep (5)

Wechat reminder function code

#! / usr/bin/env python3 #-*-coding: utf-8-*-import urllib,jsonimport urllib.parseimport urllib.requestimport sysclass WeChat (object): _ _ token_id =''def _ init__ (self) Url): self.__url = url.rstrip ('/') # change yourself self.__corpid = 'XXXXXXXXXX' self.__secret =' XXXXXXXXXXXXXX' def authID (self): params = {'corpid':self.__corpid 'corpsecret':self.__secret} data = urllib.parse.urlencode (params) content = self.getToken (data) try: self.__token_id = content [' access_token'] except KeyError: raise KeyError def getToken (self,data Url_prefix='/'): url = self.__url + url_prefix + 'gettoken?' Try: response = urllib.request.Request (url + data) except KeyError: raise KeyError result = urllib.request.urlopen (response) content = json.loads (result.read ()) return content def postData (self,data Url_prefix='/'): url = self.__url + url_prefix + 'message/send?access_token=%s'% self.__token_id request = urllib.request.Request (url Data) try: result = urllib.request.urlopen (request) except urllib.request.HTTPError as e: if hasattr: print ('reason',e.reason) elif hasattr (e 'code'): print (' code',e.code) return 0 else: content = json.loads (result.read ()) result.close () return content def sendMessage (self Message): self.authID () data = json.dumps ({'touser': ", # change' toparty':" XXX ", 'msgtype':" text ") # change 'agentid': "XXXXXX",' text': {'content':message} "by yourself 'safe': "0}, ensure_ascii=False) response = self.postData (data.encode (' utf-8'))

The current status of the active and standby equipment is as follows: all traffic is outgoing from Core01 G0ap1.

The G0Uniq1 port of the standby router Core02 is closed. (note: the G0Uniq1 configuration of Core01 is the same as that of Core02.)

From the Internet ISP to the Ping enterprise IP: 169.254.100.1 status is OK.

The following is the test crawl log and the IP of the Internet ISP to ping enterprise after line switching: 169.100.1 status

The port of Core01 connected to the Internet has been disconnected

Core02 is automatically switched by script

From ISP's router to ping Enterprise's IP: 169.254.100.1 status:

Monitor the results of the script run:

-

Next, automatically switch from Core02 to Core01.

Core01 log status

ISP to Ping Enterprise IP: 169.254.100.1 status:

The status of the script running:

* added Wechat reminder function

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