结合Nginx+Lua+Redis来搭建高并发web应用

本文介绍如何用Nginx+Lua+Redis来构建高并发Web应用，Curl请求Nginx，Nginx通过Lua查询Redis，返回json数据。

一、安装

1、安装lua-redis-parser

#git clone https://github.com/agentzh/lua-redis-parser.git

 #export LUA_INCLUDE_DIR=/usr/include/lua5.1

 #make CC=gcc

 #make install CC=gcc

2、安装json

#wget http://files.luaforge.net/releases/json/json/0.9.50/json4lua-0.9.50.zip

#unzip json4lua-0.9.50.zip

 #cp json4lua-0.9.50/json/json.lua /usr/share/lua/5.1/

3、安装redis-lua

#git clone https://github.com/nrk/redis-lua.git

 #cp redis-lua/src/redis.lua /usr/share/lua/5.1/

二、配置

#vi /etc/nginx/nginx.conf

http {

include mime.types;

default_type application/octet-stream;

access_log logs/access.log;

sendfile on;

tcp_nopush on;

tcp_nodelay on;

keepalive_timeout 60;

types_hash_max_size 2048;

server_tokens off;

lua_code_cache on;

upstream redis_pool {

server 192.168.1.105:6379;

keepalive 1024 single;

//定义连接池大小，当连接数达到此数后，后续的连接为短连接

}

server {

listen 80;

server_name 192.168.1.104;

location /get_redis{

#internal;

set_unescape_uri $key $arg_key;

redis2_query hgetall $key;

redis2_pass redis_pool;

}

location /json {

content_by_lua_file conf/test_redis.lua;

}

}

}

三、测试

1、编写脚本

编写上面配置中的test_redis.lua脚本

#vi test_redis.lua

local json = require("json")

local parser = require("redis.parser")

local res = ngx.location.capture("/get_redis",{args = { key = ngx.var.arg_key }})

if res.status == 200 then

reply = parser.parse_reply(res.body)

value = json.encode(reply)

ngx.say(value)

a = json.decode(value)

ngx.say(a[2])

end

2、构造数据

#redis-cli -h 192.168.1.105 -p 6379

redis 192.168.1.105:6379>HMSET testnlr www www.joyvc.cn mail mail.joyvc.cn

3、开始测试

#curl 'http://192.168.1.104/json?key=testnlr'

["www", "www.joyvc.cn", "mail", "mail.joyvc.cn"]