#!/bin/bash

#检测安装nginx

function detection_nginx(){

    if [ -f /etc/nginx/nginx.conf ]

        then

            echo 'nginx has been installed'

            exit

    else

        then

            yum install epel-release -y

            yum install nginx -y

            echo 'nginx successfully installed'

    fi

}

#改写配置文件

function rewrite_nginx_conf(){

    msg='upstream my_upstream{ server 192.168.19.129;server 192.168.19.130;server 192.168.19.131}'

    sed -ri "/^http/a $msg" /etc/nginx/nginx.conf    #增加upstream

    sed -ri "/^ *location \/ \{$/a proxy_pass http://my_upstream\;" /etc/nginx/nginx.conf  #修改localtion

    #重新加载nginx

    systemctl reload nginx

}

#检测安装nfs和rpcbind

function detection_nfs(){

    if [ -d /var/lib/nfs ]

        then

            echo 'nfs has been installed'

            exit

    else

        then

            yum install rpcbind nfs-utils -y

            echo 'rpcbind nfs-utils successfully installed'

    fi

}

function start_service(){

    #创建共享目录

    mkdir /share

    #给用户增加写的权限

    chmod -R o+w /share/

    #改写nfs的配置文件

    echo '/share 192.168.19.0/24(rw,sync,fsid=0)' >> /etc/exports

    #启动服务

    systemctl start rpcbind.server

    systemctl start nfs-utils.server

    #设置开机启动

    systemctl enable nfs-server.service

    systemctl enable rpcbind.service

}

detection_nginx      #执行检测安装nginx函数

rewrite_nginx_conf   #执行改写nginx.conf函数

detection_nfs        #执行检测安装nfs函数

start_service        #执行启动服务函数

#!/bin/bash

#检测安装nginx

function detection_nginx(){

    if [ -f /etc/nginx/nginx.conf ]

        then

            echo 'nginx has been installed'

            exit

    else

        then

            yum install epel-release -y

            yum install nginx -y

            echo 'nginx successfully installed'

    fi

}

#改写配置文件

function rewrite_nginx_conf(){

    sed -ri "/^ *location \/ \{$/a root /var/www/html\;index index.html\;" /etc/nginx/nginx.conf

    touch  /var/www/html/index.html

    echo 'web1 hello world' >>  /var/www/html/index.html    #写入文件内容

    systemctl restart nginx

}

#检测安装nfs和rpcbind

function detection_nfs(){

    if [ -d /var/lib/nfs ]

        then

            echo 'nfs has been installed'

            exit

    else

        then

            yum install rpcbind nfs-utils -y

            echo 'rpcbind nfs-utils successfully installed'

    fi

}

detection_nginx      #执行检测安装nginx函数

rewrite_nginx_conf   #执行改写nginx.conf函数

detection_nfs        #执行检测安装nfs函数

#挂载共享目录

showmount -e 192.168.19.128

mount -t nfs 192.168.19.128:/share /var/www/html/

#!/bin/bash

mem_limit=30 #内存使用超过30%则报警

#监控内存

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

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

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

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

if [ $memory_usage -gt $mem_limit ]

    then

        msg="TIME:$(date +%F_%T)

            HOSTNAME:$(hostname)

            IPADDR:$IP

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

        echo $msg

        /usr/bin/my_mail $msg

fi 

#!/usr/bin/python

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

import sys

import smtplib

import email.mime.multipart

import email.mime.text

server = 'smtp.163.com'

port = ''

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'] = '电脑异常邮件，请立即查看'

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

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

    user = 'python4_mail'

    pwd = 'sbalex3714'

    content='%s\n%s' %('\n'.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)

#!/user/bin/env python

#coding:utf-8

crontab -e -u root

* * * * * /mem.sh restart  #每分钟检测一次