（Nginx反向代理+NFS共享网页根目录）自动部署及可用性检测

1、nginx反向代理安装配置

 #!/usr/bin/bash
 if [ -e /etc/nginx/nginx.conf ]
     then
     echo 'Already installed'
     exit
 else
    /usr/bin/yum -y install epel*
    /usr/bin/yum -y install nginx*
 fi

 if [ -f /etc/nginx/nginx.conf ];then
     msg="upstream zhanggen { server 1.1.1.1 weight=8;server 2.2.2.2 weight=6;server 3.3.3.3;}"
     /usr/bin/sed -ri "/^http/a $msg" /etc/nginx/nginx.conf
     /usr/bin/sed -ri "/^ *location \/ \{$/a proxy_pass http://zhanggen\;" /etc/nginx/nginx.conf
 fi

 /usr/sbin/nginx -t
 return=`echo $?`
 if [ $return -ne  ]
     then
     echo "config error"
 else
     echo "config success "
 fi
 /usr/bin/systemctl start nginx
 /usr/bin/ps -ef | /usr/bin/grep nginx |/usr/bin/grep -v 'grep'

 value=`echo $?`
 if [ $value -eq  ]
     then
     echo 'Start nginx successful'
 else
     echo 'Start nginx faild please check again'
 fi

2、安装配置后端nginx

 #!/usr/bin/bash
 if [ -e /etc/nginx/nginx.conf ]
     then
     echo 'Already installed'
     exit
 else
     yum -y install epel*;
     yum -y install nginx*;
 fi

 if [ -f /etc/nginx/nginx.conf ]
     then
     nginx -t
 else
     echo "Installation failed"
 fi

 return=`echo $?`
 if [ $return -ne  ]
     then
     echo "config error"
 else
     echo "config success "
 fi

 systemctl start nginx;

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

 if [ $ngxStatus -lt  ]
     then
     echo "Start nginx successful"
 fi

3、安装NFS服务端

 #!/usr/bin/sh
 while true
 # -*- coding: UTF- -*-
 do
     test -s /etc/exports
     return=`echo $?`
     if [ $return -ne  ]
         then
         yum install rpcbind nfs-utils –y
         echo "/share * (rw,sync,fsid=0)" > /etc/exports
         mkdir -p /share
         chmod -R o+w /share
         systemctl enable nfs-server.service  && systemctl enable rpcbind.service
         systemctl start rpcbind.service && systemctl start nfs-server.service
         iptables -F && iptables -X
         share=`showmount -e`
         access_IP=`awk '{print $2}' /etc/exports`
         echo "NFS安装成功,您共享给大家的目录为: $share $access_IP可访问到它"
         exit

     else
         echo "已经安装了 NFS 服务"
         exit
     fi
 done

4、安装NFS客户端

 #!/usr/bin/sh
 while :
 do
     iptables -F && iptables -F
     yum install rpcbind nfs-utils -y
     service rpcbind start
     service nfs start
     showmount -e 192.168.182.141
     re=`echo $?`
     if [ $re -eq  ]
         then
             mount -t nfs 192.168.182.141:/share /var/www/
     else
         mount fiald !
     fi
 exit
 done

5、检查nginx和NFS可用性，并邮件报警。

 #!/usr/bin/sh
 ps -ef |grep nfsd |grep -v 'grep'
 return6=`echo $?`
     if [ $return6 -ne  ]
     then
         msg="TIME:$(/usr/bin/date +%F_%T)
             HOSTNAME:$(/usr/bin/hostname)
             IPADDR:$(/usr/sbin/ifconfig |/usr/bin/awk 'NR==2{print $2}')
             NFS is faild"
         echo "$msg"
         /usr/bin/mail $msg
         systemctl start nfs-server.service
     fi
 ps -ef |grep nginx |grep -v 'grep'
 return8=`echo $?`
     if [ $return8 -ne  ]
     then
         msg="TIME:$(/usr/bin/date +%F_%T)
             HOSTNAME:$(/usr/bin/hostname)
             IPADDR:$(/usr/sbin/ifconfig |/usr/bin/awk 'NR==2{print $2}')
             nginx is faid"
             echo "$msg"
             /usr/bin/mail $msg
             systemctl start nginx
     fi

6、Python发邮件模块 mv /usr/bin/mail

#!/usr/bin/python
# -*- coding: UTF- -*-
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'] = '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\n%s' %('\n'.join(sys.argv[:]),' '.join(sys.argv[:])) #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)

7、设置crotable 每5分钟检查一次

crontab -e

*/5 * * * * /status_check.sh