shell脚本

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；

#!/bin/bash

ngxStatus=`ps -aux |grep -v grep |grep -c nginx`

function ngxProxyInstall(){
if [ -e /usr/sbin/nginx ];
    then
        echo 'nginx already installed'p
        exit 0000
else
        yum clean all
        yum install epel-release -y
        yum install nginx -y
        echo 'install nginx successful'
fi
if [ -e /etc/nginx/nginx.conf ];
    then
        /usr/bin/cp /etc/nginx/nginx.conf /etc/nginx/nginx.conf.bak
        sed -ri '/^http/a\t upstream michael { 
	 server 192.168.145.135 weight=3;
            
	 server 192.168.145.137;
	 server 192.168.145.136;
	 }' /etc/nginx/nginx.conf
        sed -ri '/^ *location / {/a\t	 proxy_pass http://michael;' /etc/nginx/nginx.conf
        echo "welcome to beijing" >/usr/share/nginx/html/index.html
        echo 'Configuration successful'
fi
if [ $ngxStatus -lt 2 ];
    then
        systemctl start nginx
        echo 'start nginx successful'
fi
}

function nfsInstall(){
if [ -e /usr/sbin/nfs];
    then
        echo'NFS already installed'
        exit 0000
else
        yum clean all
        yum install rpcbind nfs-utils -y
        echo 'install NFS successful'
fi

if [ -z /etc/exports ];
    then
        echo '/share 192.168.145.0/24(rw,sync,fsid=0)' > /etc/exports
        echo 'deploy Exports successful'
fi

mkdir -p /share
chmod -R o+w /share

mount -t nfs 192.168.145.130:/share /usr/share/nginx/html

systemctl enable nfs-server.service
systemctl enable rpcbind.service
systemctl start rpcbind.service
systemctl start nfs-server.service

}

ngxProxyInstall
nfsInstall

　　

         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

#!/bin/bash
ngxStatus=`ps -aux |grep -v grep |grep -c nginx`

function ngxWebInstall(){
if [ -e /usr/sbin/nginx ];
    then
        echo 'nginx already installed'p
        exit 0000
else
        yum clean all
        yum install epel-release -y
        yum install nginx -y
        echo 'install nginx successful'
fi
if [ -e /etc/nginx/nginx.conf ];
    then
        /usr/bin/cp /etc/nginx/nginx.conf /etc/nginx/nginx.conf.bak
        sed -ri '/^ *location / {/a\t	 root /usr/share/nginx/html;' /etc/nginx/nginx.conf
        echo "welcome web" >/usr/share/nginx/html/index.html
        echo 'Configuration successful'
fi
if [ $ngxStatus -lt 2 ];
 then
        systemctl start nginx
        echo 'start nginx successful'
fi
}

function nfsWebInstall(){
if [ -e /usr/sbin/nfs];
    then
        echo'NFS already installed'
        exit 0000
else
        yum clean all
        yum install rpcbind nfs-utils -y
        echo 'install NFS successful'
fi

if [ -z /etc/exports ];
    then
        echo '/share 192.168.145.0/24(rw,sync,fsid=0)' > /etc/exports
        echo 'deploy Exports successful'
fi

mount -t nfs 192.168.145.130:/share /usr/share/nginx/html

systemctl enable nfs-server.service
systemctl enable rpcbind.service
systemctl start rpcbind.service
systemctl start nfs-server.service

}

ngxWebInstall
nfsWebInstal

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

第一步：

#!/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，缠缠绵绵来你家'
    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)

第二步：将上述文件内容拷贝到/usr/bin/my_mail并chmod+x /usr/bin/my_mail　

第三步：

#!/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
        echo "bc install successful"
fi
if [ $mem_per -gt 80 ];
    then
        msg="TIME:$(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
}


ngxMonitor  &>>/tmp/monitor.log
nfsMonitor  &>>/tmp/monitor.log
memMonitor  &>>/tmp/monitor.log

3.编写计划任务，定时运行监控脚本，完成监控操作

* * * * * /shell/sysCheck.sh