Build highly concurrent applications with nginx + Lua + redis

Ngx_lua embeds Lua into nginx and enables nginx to execute Lua scripts to process various requests with high concurrency and non-blocking.

The URL requests the nginx server, Lua queries redis, and returns JSON data.

1. Install LUA-nginx-Module

See lnmlgc Architecture

2. Install redis2-nginx-module Module

Get https://github.com/openresty/echo-nginx-module
Get https://github.com/openresty/redis2-nginx-module
Get https://github.com/agentzh/set-misc-nginx-module.git

#
./Configure -- prefix =/usr/local/nginx \
-- With-Debug \
-- With-PCRE = ../pcre-8.21 \
-- Add-module = ../ngx_devel_kit-0.2.19 \
-- Add-module = ../lua-nginx-module-0.9.8 \
-- Add-module = ../ECHO-nginx-module \
-- Add-module = ../redis2-nginx-module \
-- Add-module = ../set-MISC-nginx-Module

# Make
# Make install

3. Install LUA-redis-parser
# Git clone https:
// Github.com/agentzh/lua-redis-parser.git
# Export lua_include_dir =/usr/local/include/luajit-2.0
# Make cc = gcc
# Make install cc = gcc

4. Install 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. Lua/usr/local/Lua/lib/

5. Install redis-Lua
# Git clone https:
// Github.com/nrk/redis-lua.git
# Cp redis-Lua/src/redis. Lua/usr/local/Lua/lib/

Vi. Configuration

... HTTP {... upstream redis_pool {server localhost: 6379; keepalive 1024 single; // defines the connection pool size. When the number of connections reaches this value, the subsequent connections are short connections} server {... 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. lua ;}}}

# VI test. Lua, which is placed in the same directory as nginx. conf

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

7. Test
# Redis-cli
127.0.0.1: 6379> hmset ttlsa WWW www.ttlsa.com mail mail.ttlsa.com
OK
127.0.0.1: 6379> hgetall ttlsa
1) "www"
2) "www.ttlsa.com"
3) "mail"
4) "mail.ttlsa.com"

# Curl http: // localhost/JSON? Key = ttlsa

["Www", "www.ttlsa.com", "mail", "mail.ttlsa.com"]

Www.ttlsa.com