1.安装lua
1.1安装LuaJIT

yum install readline-devel
mkdir -p lua-file
cd lua-file/
wget http://luajit.org/download/LuaJIT-2.0.5.tar.gz
tar -zxvf LuaJIT-2.0.5.tar.gz 
cd LuaJIT-2.0.5
make && make install PREFIX=/usr/local/luajit

1.2配置LuaJIT环境变量

[root@localhost lua-file]# vim /etc/profile

#/etc/profile 文件中加入环境变量

export LUAJIT_LIB=/usr/local/luajit/lib
export LUAJIT_INC=/usr/local/luajit/include/luajit-2.0

[root@localhost lua-file]# source /etc/profile

1.3 lua安装测试

[root@localhost lua-file]# vim hello.lua
print('hello world lua');

[root@localhost lua-file]# lua hello.lua 
hello world lua

2.ngx_devel_kit和lua-nginx-module
ngx_devel_kit简称NDK，提供函数和宏处理一些基本任务，减轻第三方模块开发的代码量。
lua-nginx-module是nginx的lua模块

[root@localhost ~]# mkdir -p /usr/local/src/nginx
[root@localhost ~]# cd /usr/local/src/nginx/
[root@localhost nginx]# wget https://github.com/simpl/ngx_devel_kit/archive/v0.3.0.tar.gz
[root@localhost nginx]# wget https://github.com/openresty/lua-nginx-module/archive/v0.10.9rc7.tar.gz
[root@localhost nginx]# ls
v0.10.9rc7.tar.gz  v0.3.0.tar.gz
[root@localhost nginx]# tar -zxvf v0.10.9rc7.tar.gz 
[root@localhost nginx]# tar -zxvf v0.3.0.tar.gz 

3.查看已安装好的nginx
3.1查看原安装

[root@localhost nginx]# /usr/local/nginx/sbin/nginx -V
nginx version: nginx/1.14.2
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC) 
built with OpenSSL 1.0.2k-fips  26 Jan 2017
TLS SNI support enabled
configure arguments: --prefix=/usr/local/nginx --with-pcre --with-http_ssl_module --with-http_gzip_static_module

3.2 安装依赖

[root@localhost nginx]# yum -y install openssl openssl-devel zlib zlib-devel pcre-devel

3.3 进入nginx解压目录,安装扩展

[root@localhost ~]# cd nginx-1.14.2
[root@localhost nginx-1.14.2]# 

3.3.1.清空之前的编译文件

[root@localhost nginx-1.14.2]# make clean

3.3.2 执行 nginx -V 查看之前的编译参数

[root@localhost nginx-1.14.2]# /usr/local/nginx/sbin/nginx -V
nginx version: nginx/1.14.2
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC) 
built with OpenSSL 1.0.2k-fips  26 Jan 2017
TLS SNI support enabled
configure arguments: --prefix=/usr/local/nginx --with-pcre --with-http_ssl_module --with-http_gzip_static_module

3.3.3 添加扩展执行编译

[root@localhost nginx-1.14.2]# ls /usr/local/src/nginx/
lua-nginx-module-0.10.9rc7  ngx_devel_kit-0.3.0  v0.10.9rc7.tar.gz  v0.3.0.tar.gz
[root@localhost nginx-1.14.2]# ./configure --prefix=/usr/local/nginx --with-pcre --with-http_ssl_module --with-http_gzip_static_module --add-module=/usr/local/src/nginx/lua-nginx-module-0.10.9rc7/ --add-module=/usr/local/src/nginx/ngx_devel_kit-0.3.0/

3.3.4.执行make (不能执行 make install)

[root@localhost nginx-1.14.2]# make
(打开新连接窗口操作）重命名 nginx 旧版本二进制文件，即 sbin 目录下的 nginx（期间 nginx 并不会停止服务）
[root@localhost nginx-1.14.2]# cd /usr/local/nginx/sbin/
[root@localhost sbin]# ls
nginx
[root@localhost sbin]# mv nginx nginx.old
[root@localhost sbin]# ls
nginx.old

拷贝一份新编译的二进制文件到安装目录

[root@localhost nginx-1.14.2]# pwd
/root/nginx-1.14.2
[root@localhost nginx-1.14.2]# cd objs/
[root@localhost objs]# cp nginx /usr/local/nginx/sbin/
[root@localhost objs]# ls /usr/local/nginx/sbin/
nginx  nginx.old
 

在源码目录执行 make upgrade 开始升级

[root@localhost nginx-1.14.2]# make upgrade
/usr/local/nginx/sbin/nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
kill -USR2 `cat /usr/local/nginx/logs/nginx.pid`
sleep 1
test -f /usr/local/nginx/logs/nginx.pid.oldbin
kill -QUIT `cat /usr/local/nginx/logs/nginx.pid.oldbin`

如果有这个报错：nginx: error while loading shared libraries: libluajit-5.1.so.2: cannot open shared object file: No such file or directory#解决方案
[root@localhost nginx-1.14.2]# vim /etc/ld.so.conf

#新增一条
 /usr/local/luajit/lib

#保存文件，执行ldconfig

[root@localhost nginx-1.14.2]# ldconfig  

###查看是否安装成功
[root@localhost nginx-1.14.2]# /usr/local/nginx/sbin/nginx -V
nginx version: nginx/1.14.2
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC) 
built with OpenSSL 1.0.2k-fips  26 Jan 2017
TLS SNI support enabled
configure arguments: --prefix=/usr/local/nginx --with-pcre --with-http_ssl_module --with-http_gzip_static_module --add-module=/usr/local/src/nginx/lua-nginx-module-0.10.9rc7/ --add-module=/usr/local/src/nginx/ngx_devel_kit-0.3.0/

4 nginx引入lua调试
4.1 nginx.conf引入lua

[root@localhost conf]# pwd
/usr/local/nginx/conf
[root@localhost conf]# vim nginx.conf

set $test "hello world lua";
        location /lua_test {
                content_by_lua '
                        ngx.header.content_type="text/plain";
                        ngx.say(ngx.var.test);
                ';
        }

       


4.2 重启nginx,执行访问
[root@localhost nginx]# /usr/local/nginx/sbin/nginx -s reload
执行访问

5.实现lua连接redis
redis集群扩展包：https://github.com/onlonely/lua-redis-cluster
对于lua来说，它是一个非常轻量级的脚本语言，而它本身也与php的composer是一样的，是可以添加扩展，只是他们的扩展我们需要自己找对应的模块库
官方组件：https://openresty.org/cn/components.html

[root@localhost 5.1]# pwd

/usr/local/luajit/share/lua/5.1
5.2 下载快速JSON编码/解析

[root@localhost 5.1]# git clone https://github.com/openresty/lua-cjson.git

5.3 下载 lua-resty-redis （单机版redis）客户端

[root@localhost 5.1]# wget https://codeload.github.com/agentzh/lua-resty-redis/tar.gz/v0.26

tar -zxvf v0.26

cd lua-resty-redis-0.26/lib/resty/

cp redis.lua /usr/local/nginx/conf/lua/

5.4 lua连接单机版本redis

资料地址：https://github.com/openresty/lua-resty-redis

5.4.1编辑nginx.conf脚本
    #引入lua-reds 扩展库（此处可以在lua脚本里面引入，公共的也可以在此引入）
     #连接单机版本的redis

lua_package_path "/usr/local/nginx/conf/lua/redis.lua;;";

location /lua_redis {
             default_type 'application/x-javascript;charset=utf-8';
              content_by_lua_file /usr/local/nginx/conf/lua/lua_redis.lua;
   }

 

5.4.2 编辑连接redis的lua脚本

[root@localhost conf]# vim lua/lua_redis.lua 

local redis = require "resty.redis"
local red = redis:new()

red:set_timeouts(1000, 1000, 1000) -- 1 sec

--lua 连接redis
local ok,err = red:connect("127.0.0.1", 6379)

if not ok then
       ngx.say("failed to connect: ", err)
       return
end


--设置数据
local date=os.date("%Y-%m-%d %H:%M:%S")
ok,err = red:set("dog", date.."-数据")
if not ok then
       ngx.say("failed to set dog: ", err)
       return
end


--获取设置的值
local res,err=red:get("dog")
if not res then
	ngx.say("failed to get dog",err)
	return
end

ngx.say(res)

5.4.3 重启nginx,访问nginx，数据成功写入redis,并读取

[root@localhost lua]# /usr/local/nginx/sbin/nginx -s reload

#(重启报错，自行查看nginx 的 error.log文件，具体根据自行的错误日志输错文件目录查看)
[root@localhost lua]# ls /usr/local/nginx/logs/
access.log  error.log

准备工作已经完成，现在要实现nginx+Lua+Redis自动封禁并解封IP了,参考前面文章，这里不重复了

Nginx+Lua脚本+Redis 实现自动封禁访问频率过高IP-CSDN博客