配置keepalived主从切换时发送告警邮件

邮件脚本：

keepalived_notify.py

#!/usr/bin/env python
# -*- coding:utf-8 -*-

import smtplib
from email.mime.text import MIMEText
from email.header import Header
import sys, time, subprocess



# 第三方 SMTP 服务
mail_host="smtp.exmail.qq.com"  #设置服务器
mail_user="xxx"    #用户名
mail_pass="xxx"   #口令


sender = 'pairobot2@tuandai.com'    # 邮件发送者
receivers = ['xx1@qq.com', 'xx2@163.com']  # 接收邮件，可设置为你的QQ邮箱或者其他邮箱

p = subprocess.Popen('hostname', shell=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
hostname = p.stdout.readline().split('\n')[0]

message_to = ''
for i in receivers:
    message_to += i + ';'

def print_help():
    note = '''python script.py role ip vip
    '''
    print(note)
    exit(1)

time_stamp = time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))

if len(sys.argv) != 4:
    print_help()
elif sys.argv[1] == 'master':
    message_content = '%s server: %s(%s) change to Master, vIP: %s' %(time_stamp, sys.argv[2], hostname, sys.argv[3])
    subject = '%s change to Master -- keepalived notify' %(sys.argv[2])
elif sys.argv[1] == 'backup':
    message_content = '%s server: %s(%s) change to Backup, vIP: %s' %(time_stamp, sys.argv[2], hostname, sys.argv[3])
    subject = '%s change to Backup -- keepalived notify' %(sys.argv[2])
else:
    print_help()

message = MIMEText(message_content, 'plain', 'utf-8')
message['From'] = Header(sender, 'utf-8')
message['To'] =  Header(message_to, 'utf-8')

message['Subject'] = Header(subject, 'utf-8')

try:
    smtpObj = smtplib.SMTP()
    smtpObj.connect(mail_host, 25)    # 25 为 SMTP 端口号
    smtpObj.login(mail_user,mail_pass)
    smtpObj.sendmail(sender, receivers, message.as_string())
    print("邮件发送成功")
except smtplib.SMTPException as e:
    print("Error: 无法发送邮件")
    print(e)

使用方法：

python script.py{脚本名} role{master|backup} ip{本keepalived服务器IP} vip{虚拟IP}

master keepalived:

global_defs {
        notification_email {
                xx@qq.com
        }

        notification_email_from keepalived@qq.com
        smtp_server 127.0.0.1
        smtp_connect_timeout 30
        router_id LVS_DEVEL
}
## 上面的配置邮件只能发送到本机，mail 可查看


vrrp_script chk_http_port {
        script "</dev/tcp/127.0.0.1/80"
        interval 2
        weight -10
}


vrrp_instance VI_1 {
        state BACKUP        ############ MASTER｜BACKUP
        interface ens160
        virtual_router_id 11
        mcast_src_ip 192.168.1.178
        priority 99                  ########### 权值要比 back 高
        advert_int 2

        authentication {
                auth_type PASS
                auth_pass 8u90u3fhE3FQ
        }

        track_script { 
                chk_http_port ### 执行监控的服务 
        }

        virtual_ipaddress {
                192.168.1.96
        }

        notify_master "/bin/python /script/keepalived_notify.py master 192.168.1.178 192.168.1.96"
        notify_backup "/bin/python /script/keepalived_notify.py backup 192.168.1.178 192.168.1.96"

}

backup keepalived:

global_defs {
        notification_email {
                xx@qq.com
        }

        notification_email_from keepalived@qq.com
        smtp_server 127.0.0.1
        smtp_connect_timeout 30
        router_id LVS_DEVEL
}
## 上面的配置邮件只能发送到本机，mail 可查看


vrrp_script chk_http_port {
        script "</dev/tcp/127.0.0.1/80"
        interval 2
        weight -10
}


vrrp_instance VI_1 {
        state BACKUP        ############ MASTER｜BACKUP
        interface ens160
        virtual_router_id 11
        mcast_src_ip 192.168.1.174
        priority 100                  ########### 权值要比 back 高
        advert_int 2

        authentication {
                auth_type PASS
                auth_pass 8u90u3fhE3FQ
        }

        track_script { 
                chk_http_port ### 执行监控的服务 
        }

        virtual_ipaddress {
                192.168.1.96
        }

        notify_master "/bin/python /script/keepalived_notify.py master 192.168.1.174 192.168.1.96"
        notify_backup "/bin/python /script/keepalived_notify.py backup 192.168.1.174 192.168.1.96"

}