Shell script: One-click installation of Nginx service, users can customize the Nginx version

I often install the Nginx service, and sometimes it is annoying to install the different version, and then I wrote a script that can customize the Nginx version (well, with the help of a friend, haha).

Not much, the content is as follows:

#!/bin/bash

#Nginx版本
ver=nginx-1.$2.$3

# 安装目录
in_dir="/app/$ver"

#软件存放目录
dl_dir="/server"

#最终运行目录
run_dir=/app/nginx

if [ ! -d $in_dir ];then
    mkdir -p $in_dir
fi
if [ ! -d $dl_dir ];then
    mkdir $dl_dir
fi


##安装nginx
function nginx_install (){
    
    
yum -y install gcc gcc-c++ pcre-devel zlib-devel openssl-devel 
if [ $? -eq 0 ]
then
    curl  "http://nginx.org/download/$ver.tar.gz" -o $dl_dir/$ver.tar.gz && \ 
    useradd -M -s /sbinlogin nginx  && \
    tar xf $dl_dir/$ver.tar.gz -C $dl_dir  && \
    cd $dl_dir/$ver
    ./configure  --prefix=$in_dir --user=nginx --group=nginx  && \ 
    make  && make install 
fi



}
function nginx_init (){
    
    
  ln -s $in_dir $run_dir
}


function nginx_start (){
    
    

  ps -ef |grep nginx |grep master

  if [ $? = 0  ];then
        echo "Nginx is Running."
  else
        if [ ! -e $run_dir/sbin/nginx ];then
        nginx_init
        fi
	$run_dir/sbin/nginx
        sleep 5
        ps -ef |grep nginx |grep master
        if [ $? = 0  ];then
        echo "Nginx Start successfully."
        else
        echo "Nginx Failed to Start."
	fi
  fi

}


function nginx_stop (){
    
    
	$run_dir/sbin/nginx -s quit	
        sleep 5
        ps -ef |grep nginx |grep master
        if [ $? != 0  ];then
	    echo "Nginx Stop successfully."
        else
            echo "Nginx Failed to Stop."
	fi
}

function nginx_reload (){
    
    
	$run_dir/sbin/nginx -s reload 
}

main(){
    
    
  nginx_install
  nginx_start
}

case $1 in 
install)
	nginx_install
	nginx_init
	nginx_start
	;;
start)
	nginx_start
	;;
stop)
	nginx_stop
	;;
restart)
	nginx_stop
	nginx_start
	;;
reload)
	nginx_reload
	;;
*)
	echo "使用方法"
	echo "$0 start|stop|restart|reload"	
	echo "安装方法"
	echo "$0 install <版本号> <小版本号>  例如：$0 install 19 3 下载的就是1.19.3版本 "
	;;
esac

#if [ $# = 0 ];then
#	echo  "使用 $0 后面加上小版本号进行部署：例如 $0 19 3 下载的就是1.19.3版本"
#else
#	echo "下载版本：1.$2.$3"
#	echo "安装目录：$in_dir"
#	echo "下载目录：$dl_dir"
#	echo "Nginx installation..." 
#        nginx_install
#        if [ $? != 0 ];then
##	echo "Ngins installation Failed."
#	else 
#        nginx_init
#        nginx_start
#        fi	
#fi

• This script allows users to choose the version of Nginx they want to install
• For example, if I want to install a version of nginx-1.16.1, I can do this:

sh install_nginx.sh install 16 1

• Of course, if you don’t know how to use it at the beginning, and execute the script directly, it’s okay, there is a hint:

[root@localhost ~]# sh install_nginx.sh
使用方法
install_nginx.sh start|stop|restart|reload
安装方法
install_nginx.sh install <版本号> <小版本号>  例如：install_nginx.sh install 19 3 下载的就是1.19.3版本 

• Look, not only tells you how to use it to install services, but you can also run scripts directly for management
• When you just finished the installation, it is started by default, you can use the script to shut down or restart:

[root@localhost ~]# sh install_nginx.sh stop
Nginx Stop successfully.
[root@localhost ~]# sh install_nginx.sh reload

• Then you can modify the configuration and turn it on:

[root@localhost ~]# sh install_nginx.sh start
root       4236      1  0 14:23 ?        00:00:00 nginx: master process /app/nginx/sbin/nginx
Nginx Start successfully.

• Check its status to see if it is running:

[root@localhost ~]# ss -utpln | grep nginx
tcp    LISTEN     0      128       *:80                    *:*                   users:(("nginx",pid=4238,fd=6),("nginx",pid=4236,fd=6))

• Let's visit it with a browser!
  
• You can see the Nginx welcome page, indicating that we are successful!