Nginx+Lua+Redis构建高并发Web应用

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.zzaxw.com mail mail.zzaxw.com

3、开始测试

#curl 'http://192.168.1.104/json?key=testnlr'
["www", "www.zzaxw.com", "mail", "mail.zzaxw.com"]