开发脚本自动部署及监控

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；

 1.创建脚本文件并赋予执行权限。

2.编写脚本

#!/bin/bash
#安装必要软件以及部署准备
    yum install epel-release -y -q
    yum install gcc-* glibc-* openssl openssl-devel pcre pcre-devel zlib zlib-devel -y -q
    yum install nginx -y -q
    yum install rpcbind nfs-utils -y -q
systemctl stop firewalld

ps axu | grep 'nagxin' | grep -v 'grep' &> /dev/null
if [ $? -ne 0 ]
    then
        systemctl restart nginx
fi
if [ ! -d /share ];then
    mkdir -p /share
    chmod -R o+w /share
fi
#设置反向代理
function nginxstart() {
if [ -f /etc/nginx/ngxin.conf ];
    then
        sed -ri '/^http/a\t upstream pythonweb { 
	 server 192.168.20.132 weight=3;
	 server 192.168.20.130;
	 server 192.168.20.131;
	 }' /etc/nginx/nginx.conf
        sed -ri '/^ *location / {/a\t	 proxy_pass http://pythonweb;' /etc/nginx/nginx.conf
        echo "Configuration successful"
fi
}
#启动nfs并设置共享目录
function nfs() {
    echo '/share 192.168.20.0/24(rw,sync,fsid=0)' > /etc/exports
    systemctl enable rpcbind.service
    systemctl enable nfs-server.service
    systemctl start rpcbind.service
    systemctl start nfs-server.service
    mount -t nfs 192.168.20.129:/share /var/html/
    chmod -R o+w /share
}

nginxstart
nfs

    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

1.准备发邮箱的工具

#!/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'] = '内存不足！'
    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.赋予执行权限，移动到环境变量文件夹。

3.新建监控脚本文件

 # vim /root/jiankong.sh

#!/bin/bash

mem_limit=80 #内存使用超过80%则报警

function monitor_mem(){
    mem_total=`free |awk 'NR==2{print $2}'`
    mem_use=`free |awk 'NR==2{print $3}'`
    mem_per=`echo "scale=2;$mem_use/$mem_total" |bc -l|cut -d. -f2`
    if [ $mem_per -gt $mem_limit ]
        then
            msg="TIME:$(date +%F_%T)
                 HOSTNAME:$(hostname)
                 IPADDR:$(ifconfig |awk 'NR==2{print $2}')
                 MSG:注意，您的内存使用已经达到 ${mem_per}%"
            echo $msg
            /usr/bin/my_mail $msg
    fi
}
monitor_mem &>> /tmp/monitor.log

    3.编写计划任务，定时运行监控脚本，完成监控操作

# crontab -e -u root