shell脚本自动部署nignx反向代理及web服务器，共享存储

#!/bin/bash

systemctl status nginx
var=$?
if [ $var -eq 4 ]
    then
        yum install epel-release -y
        if [$? -ne 0 ]
            then
                echo "epel库安装失败，无可用nginx源"
        else
            yum install nginx -y
            if [ $? -eq 0 ]
                then
                    systemctl start nginx
                if [ $? -eq 0 ]
                    then echo "nginx start ok"
                else
                    echo "nginx start fail"
                fi
            else
                echo "nginx install fail"
            fi
        fi
elif [ $var -eq 3 ]
    then
        systemctl start nginx
    if [ $? -eq 0 ]
        then
            echo "nginx start ok"
    else
        echo "nginx start fail"
    fi
elif [ $var -eq 0 ]
   then
        echo "nginx is OK"
else
    echo
        "nginx can't be installed"
fi
echo "修改配置文件"
grep 'upstream' /etc/nginx/nginx.conf
if(($? != 0))
    then
    sed -ri '/^http/a upstream pythonweb {' /etc/nginx/nginx.conf
    sed -ri '/^upst/a server 192.168.211.136 weight=3;' /etc/nginx/nginx.conf
    sed -ri '/^server 192.168.211.136/a server 192.168.211.137;' /etc/nginx/nginx.conf
    sed -ri '/^server 192.168.211.137/a server 192.168.211.138;' /etc/nginx/nginx.conf
    sed -ri '/^server 192.168.211.138/a }' /etc/nginx/nginx.conf
    sed -ri '/^( +)(location)( )(/)/a proxy_pass http://pythonweb;' /etc/nginx/nginx.conf
fi
echo "配置文件修改成功"
echo "重新加载nginx"
systemctl reload nginx
if(($?==0))
    then
    echo "HTTP load balancer is OK!"
else
    echo "Sorry!!"
fi
systemctl status nfs-server
var1=$?
if(($var1==4))
    then
    yum install rpcbind nfs-utils -y
    if(($?==0))
        then
        systemctl start rpcbind nfs-server
        if(($?==0))
            then
            echo "Congratulations!! nfs start OK!!"
        else
            echo "Sorry is Fail!!!"
        fi
    else
        echo"sorry install is Fail!!!"

    fi
elif(($var1==3))
    then
    echo "nfs-server未执行"
    systemctl  start rpcbind nfs-server
    if(($?==0))
        then
        echo "Congratulations!! nfs start OK!!!"
    else
        echo "sorry!!"
    fi
elif(($var1==0))
    then
    echo "OKOKOK!!!"
else
    echo "I am so sorry"
fi
echo "修改配置文件"
test -d /share
if [ $? != 0 ]
   then
       mkdir /share
       chmod -R 777 /share
fi
echo "/share 192.168.16.0/24(rw,sync,fsid=0)" > /etc/exports
echo "配置文件修改成功"
echo "重新加载nfs-server"
systemctl reload nfs-server
if(($?==0))
    then
        echo "NFS service is OK!"
else
    echo "Sorry!!"
fi