自动化部署nginx负载均衡及监控短信报警

题：

开发脚本自动部署及监控
1.编写脚本自动部署反向代理、web、nfs；
要求：
I、部署nginx反向代理三个web服务，调度算法使用加权轮询；
II、所有web服务使用共享存储nfs，保证所有web都对其有读写权限，保证数据一致性；
2.编写监控脚本，监控集群内所有服务存活状态，内存、磁盘剩余率检测，异常则发送报警邮件
3.编写计划任务，定时运行监控脚本，完成监控操作

------------------------------------------------------

1、安装nginx及nfs服务端

#!/bin/bash

#insatll nginx proxy

  

IP=`ifconfig |awk -F" " 'NR==2{print $2}'
`  

#insyall nginx proxy

function install_nginx() {

yum remove nginx -y

yum install nginx -y

touch /etc/nginx/conf.d/proxy.conf

cat > /etc/nginx/conf.d/proxy.conf <<EOF

    upstream web {

　　　　　　　　ip_hash; 

        server 192.168.17.126;

        server 192.168.17.127;

    }

    

    server {

　　　　　　　　ip_hash;  

        listen 80;

        server_name $IP;

        location / {

            proxy_pass http://web;

        }

    }

EOF

systemctl start nginx

}

 

#install nfs server

function install_nfs_server() {

yum install rpcbind nfs-utils -y

[ -d /share ] || mkdir  /share && chmod o+w /share

echo "/share 192.168.17.128/24(rw,sync,fsid=0)" > /etc/exports

systemctl start rpcbind.service

systemctl start nfs-server.service

}

while :

do

    read -p "please choice your install server{nginx|nfs}: " server

    if [ $server = "nginx" ]

    then

        install_nginx

    elif [ $server = "nfs" ]

    then

        install_nfs_server

    else

        exit

    fi

done

2、安装客户端nginx-nfs

[root@web01 mnt]# cat install_nginx.sh

#!/bin/bash

#insatll nginx 

  

IP=`ifconfig |awk -F" " 'NR==2{print $2}'`

  

#insyall nginx proxy

function install_nginx() {

yum install nginx -y

echo "welcome to web01" >/usr/share/nginx/html/index.html

systemctl start nginx

}

 

#install nfs server

function install_nfs_server() {

yum install rpcbind nfs-utils -y

systemctl start rpcbind.service

systemctl start nfs-server.service

mount -t nfs 192.168.17.128:/share /usr/share/nginx/html/

}

while :

do

    read -p "please choice your install server{nginx|nfs}: " server

    if [ $server = "nginx" ]

    then

        install_nginx

    elif [ $server = "nfs" ]

    then

        install_nfs_server

    else

        exit

    fi

done

3、编写监控脚本，监控集群内所有服务存活状态，内存、磁盘剩余率检测，异常则发送报警邮件

#!/usr/bin/python

# -*- coding: UTF-8 -*-

import sys

import smtplib

import email.mime.multipart

import email.mime.text

 

server = 'smtp.163.com'

port = '25'

 

def sendmail(server,port,user,pwd,msg):

    smtp = smtplib.SMTP()

    smtp.connect(server,port)

    smtp.login(user, pwd)

    smtp.sendmail(msg['from'], msg['to'], msg.as_string())

    smtp.quit()

    print('邮件发送成功email has send out !')

 

 

if __name__ == '__main__':

    msg = email.mime.multipart.MIMEMultipart()

    msg['Subject'] = '你是风儿我是沙，缠缠绵绵回我家'

    msg['From'] = 'python4_mail@163.com'

    msg['To'] = 'python4_recvmail@163.com'

    user = 'python4_mail'

    pwd = 'sbalex3714'

    content='%s %s' %(' '.join(sys.argv[1:4]),' '.join(sys.argv[4:])) #格式处理，专门针对我们的邮件格式

 

    txt = email.mime.text.MIMEText(content, _charset='utf-8')

    msg.attach(txt)

 

    sendmail(server,port,user,pwd,msg)

2)将监控脚本重命名为mail，拷贝到/usr/bin/mail.赋x权限

3）定时监控脚本

#!/bin/sh

  

function ngxMonitor(){  #监控nginx服务

ps aux | grep nginx| grep -v grep &>/dev/null

if [ $? -ne 0 ];then

    msg="TIME:$(date +%F_%T)

         HOSTNAME:$(hostname)

         IPADDR:$(/usr/sbin/ifconfig |awk 'NR==2{print $2}')

         MSG:Nginx program is crash, Waiting to restart"

    echo $msg

    /usr/bin/my_mail $msg

    systemctl restart nginx

fi

}

  

function nfsMonitor(){ #监控nfs服务

ps aux | grep nfs| grep -v grep &>/dev/null

if [ $? -ne 0 ];then

    msg="TIME:$(date +%F_%T)

         HOSTNAME:$(hostname)

         IPADDR:$(/usr/sbin/ifconfig |awk 'NR==2{print $2}')

         MSG:NFS program is crash, Waiting to restart"

    echo $msg

    /usr/bin/my_mail $msg

    systemctl restart nginx

fi

}

  

function memMonitor(){  #监控内存

mem_use=`free | awk 'NR==2{print $3}'`

mem_total=`free | awk 'NR==2{print $2}'`

mem_per=`echo "scale=2;$mem_use/$mem_total"|bc -l |cut -d . -f2`

  

if [ ! -e /usr/bin/bc ];then

    yum install bc -y -q

    echo "bc install successful"

fi

if (( $mem_per > 10 )); then

    msg="TIME:$(date +%F_%T)

         HOSTNAME:$(hostname)

         IPADDR:$(/usr/sbin/ifconfig |awk 'NR==2{print $2}')

         MSG:Memory usage exceeds the limit,current value is ${mem_per}%"

         echo $msg

         /usr/bin/my_mail $msg

fi

}

  

function diskMonitor(){  #监控磁盘

space_use=`df $disk |awk 'NR==2{print $5}'|cut -d% -f1`

  

if [ $space_use -gt 80 ];then

    msg="TIME:$(date +%F_%T)

         HOSTNAME:$(hostname)

         IPADDR:$(/usr/sbin/ifconfig |awk 'NR==2{print $2}')

         MSG:Disk space usage exceeds the limit,current value is ${space_use}%"

    echo $msg

    /usr/bin/my_mail $msg

fi

}

  

  

ngxMonitor  &>>/tmp/monitor.log

nfsMonitor  &>>/tmp/monitor.log

memMonitor  &>>/tmp/monitor.log

diskMonitor &>>/tmp/monitor.log

 

4、计划任务，每天早上9点执行

00 09 * * * /shell/sysCheck.sh

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