开发脚本自动部署及监控

一、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；

I、

#!/bin/bash
ngxstatus=`ps -aux |grep -v grep |grep -c nginx`
function proxyinstall(){
if [ -e /usr/sbin/nginx ];
    then
        echo 'nginx is already installed'p
        exit 0000
else
        yum clean all
        yum install epel-release -y
        yum install nginx -y
        echo 'nginx ok'
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 webgroup { 
	 server 192.168.11.94 weight=3;<br> 
	 server 192.168.11.96;
	 server 192.168.11.97;
	 }' /etc/nginx/nginx.conf
        sed -ri '/^ *location / {/a\t	 proxy_pass http://webgroup;' /etc/nginx/nginx.conf
        echo "12321" >/usr/share/nginx/html/index.html
        echo 'nginx.conf is ok'
fi
if [ $ngxstatus -lt 2 ];
    then
        systemctl start nginx
        echo 'nginx active'
fi
}
 
function nfsinstall(){
if [ -e /usr/sbin/nfs ];
    then
        echo'nfs is already installed'
        exit 0000
else
        yum clean all
        yum install rpcbind nfs-utils -y
        echo 'nfs ok'
fi
 
if [ -z /etc/exports ];
    then
        echo '/share 192.168.11.0/24(rw,sync,fsid=0)' > /etc/exports
        echo 'exports ok'
fi
 
mkdir /share
chmod -R o+w /share
 
mount -t nfs 192.168.11.58:/share /usr/share/nginx/html
 
systemctl enable nfs-server.service
systemctl enable rpcbind.service
systemctl start rpcbind.service
systemctl start nfs-server.service
 
}
 
proxyinstall
nfsinstall

II、

#!/bin/bash
ngxstatus=`ps -aux |grep -v grep |grep -c nginx`
 
function ngxwebinstall(){
if [ -e /usr/sbin/nginx ];
    then
        echo 'nginx installed'p
        exit 0000
else
        yum clean all
        yum install epel-release -y
        yum install nginx -y
        echo 'nginx ok'
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 "23432" >/usr/share/nginx/html/index.html
        echo 'nginx.conf is ok'
fi
if [ $ngxstatus -lt 2 ];
 then
        systemctl start nginx
        echo 'nginx active'
fi
}
 
function nfswebinstall(){
if [ -e /usr/sbin/nfs ];
    then
        echo'nfs installed'
        exit 0000
else
        yum clean all
        yum install rpcbind nfs-utils -y
        echo 'nfs ok'
fi
 
if [ -z /etc/exports ];
    then
        echo '/share 192.168.11.0/24(rw,sync,fsid=0)' > /etc/exports
        echo 'exports ok'
fi
 
mount -t nfs 192.168.11.58:/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

　　

二、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、准备发送邮件工具

#!/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'] = '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、将上述内容拷贝到/usr/bin/mail并chmod +x /usr/bin/mail

3、然后新建监控脚本servermonitor.sh

#!/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

　　

三、编写计划任务，定时运行监控脚本，完成监控操作

* * * * * /shell/sysjk.sh<br>