1.安装openresty

yum install yum-utils -y

#安装yum工具箱

yum-config-manager --add-repo https://openresty.org/package/centos/openresty.repo

#添加openresty源

yum install openresty -y

#安装openresty,这个软件代替Nginx的

​echo "export PATH=$PATH:/usr/local/openresty/nginx/sbin" >> /etc/profile

source /etc/profile

定义openresty的启动脚本：

vim /etc/init.d/openresty​

#!/bin/sh
#
# openresty - this script starts and stops the openresty daemin
#
# chkconfig:   - 85 15
# description:  OpenResty is a full-fledged web platform that integrates \ 
#   the standard Nginx core, LuaJIT, many carefully written Lua libraries, \
#   lots of high quality 3rd-party Nginx modules, and most of their external dependencies.
# processname: openresty
# config:      /usr/local/openresty/nginx/conf/nginx.conf
# pidfile:     /usr/local/openresty/nginx/logs/nginx.pid
# Url http://www.cnblogs.com/wushuaishuai/
# Last Updated 2018.07.15

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0

nginx="/usr/local/openresty/nginx/sbin/nginx"
#程序，可以看出本身就是一个nginx
prog=$(basename $nginx)

NGINX_CONF_FILE="/usr/local/openresty/nginx/conf/nginx.conf"
#配置文件，记住这个路径，需要把原来nginx配置复制过来的
NGINX_PID="/usr/local/openresty/nginx/logs/nginx.pid"

[ -f /etc/sysconfig/nginx ] && . /etc/sysconfig/nginx

lockfile=/var/lock/subsys/nginx

start() {
    [ -x $nginx ] || exit 5
    [ -f $NGINX_CONF_FILE ] || exit 6
    echo -n $"Starting $prog: "
    daemon $nginx -c $NGINX_CONF_FILE
    retval=$?
    echo
    #service php-fpm start
    [ $retval -eq 0 ] && touch $lockfile
    return $retval
}
stop() {
    echo -n $"Stopping $prog: "
    $nginx -s stop
    echo_success
    retval=$?
    echo
    #service php-fpm stop
    [ $retval -eq 0 ] && rm -f $lockfile
    return $retval
}

restart() {
    stop
    start
}

reload() {
    configtest || return $?
    echo -n $"Reloading $prog: "
    $nginx -s reload
    RETVAL=$?
    echo
}

force_reload() {
    restart
}

configtest() {
  $nginx -t -c $NGINX_CONF_FILE
}

rh_status() {
    status $prog
}

rh_status_q() {
    rh_status >/dev/null 2>&1
}

case "$1" in
    start)
        rh_status_q && exit 0
        $1
        ;;
    stop)
        rh_status_q || exit 0
        $1
        ;;
    restart|configtest)
        $1
        ;;
    reload)
        rh_status_q || exit 7
        $1
        ;;
    force-reload)
        force_reload
        ;;
    status)
        rh_status
        ;;
    condrestart|try-restart)
        rh_status_q || exit 0
            ;;
    *)
        echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}"
        exit 2
esac

2.安装 sockproc

mkdir  -pv /southtv/openresty

cd /southtv/openresty

#创建文件夹

yum install git -y

#安装工具

git clone https://github.com/juce/sockproc

#克隆软件包

yum install gcc -y

#安装编译环境

make

#编译

nginx 调用shell 脚本_nginx

./sockproc /var/run/shell.sock

chmod 0666 /var/run/shell.sock

3.安装lua-resty-shell模块

git clone https://github.com/juce/lua-resty-shell

#克隆软件包

cp lib/resty/shell.lua  /usr/local/openresty/lualib/resty/

#下载完成解压，把lib/resty/shell.lua 这个文件复制给openresty，

#其实上面的操作只是为了拉取这个shell.lua脚本文件，我们只要将下面的代码复制到 vim /usr/local/openresty/lualib/resty/shell.lua 这里面

-- Copyright (C) 2014 Anton Jouline (juce)


local format = string.format
local match = string.match
local find = string.find
local tcp = ngx.socket.tcp
local tonumber = tonumber


local shell = {
    _VERSION = '0.02'
}

local default_socket = "unix:/tmp/shell.sock"


function shell.execute(cmd, args)
    local timeout = args and args.timeout
    local input_data = args and args.data or ""
    local socket = args and args.socket or default_socket

    local is_tcp
    if type(socket) == 'table' then
        if socket.host and tonumber(socket.port) then
            is_tcp = true
        else
            error('socket table must have host and port keys')
        end
    end

    local sock = tcp()
    local ok, err
    if is_tcp then
        ok, err = sock:connect(socket.host, tonumber(socket.port))
    else
        ok, err = sock:connect(socket)
    end
    if ok then
        sock:settimeout(timeout or 15000)
        sock:send(cmd .. "\r\n")
        sock:send(format("%d\r\n", #input_data))
        sock:send(input_data)

        -- status code
        local data, err, partial = sock:receive('*l')
        if err then
            return -1, nil, err
        end
        local code = match(data,"status:([-%d]+)") or -1

        -- output stream
        data, err, partial = sock:receive('*l')
        if err then
            return -1, nil, err
        end
        local n = tonumber(data) or 0
        local out_bytes = n > 0 and sock:receive(n) or nil

        -- error stream
        data, err, partial = sock:receive('*l')
        if err then
            return -1, nil, err
        end
        n = tonumber(data) or 0
        local err_bytes = n > 0 and sock:receive(n) or nil

        sock:close()

        return tonumber(code), out_bytes, err_bytes
    end
    return -2, nil, err
end


return shell

4.配置openresty内置的nginx

首先可以通过whereis nginx 查看nginx安装的位置，按本文步骤下的ngxin在/usr/local/openresty/nginx/sbin/nginx目录下，所以也可以通过nginx reload命令单独reload nginx：

/usr/local/openresty/nginx/sbin/nginx -s reload

编辑nginx作为测试：

vim /usr/local/openresty/nginx/conf/nginx.conf

具体内容如下

#增加一个localtion 配置
location = /test {
            content_by_lua_file /server/tools/remoteshell/test.lua;
 }

lua文件可以在任意位置，具体demo如下：

vim /server/tools/remoteshell/test.lua    
local shell = require "resty.shell"
   local args = {
            socket = "unix:/var/run/shell.sock",  
   }
local status, out, err = shell.execute("ls", args)
ngx.header.content_type = "text/plain"
ngx.say("Result:\n" .. out)

systemctl restart openresty

重启openresty，访问http://IP/test应该就可以看到date的输出

nginx 调用shell 脚本_lua_02

#效果