nginx-lua模块集中化管理

安装

安装luajit 下载nginx、ngx_devel_kit-0.3.0、lua-nginx-module-0.10.6

• luajit

wget -c http://luajit.org/download/LuaJIT-2.0.2.tar.gz
tar xzvf LuaJIT-2.0.2.tar.gz
cd LuaJIT-2.0.2
make install

• nginx编译

wget 'http://nginx.org/download/nginx-1.11.2.tar.gz'
tar -xzvf nginx-1.11.2.tar.gz
cd nginx-1.11.2/
export LUAJIT_LIB=/path/to/luajit/lib
export LUAJIT_INC=/path/to/luajit/include/luajit-2.0
./configure --add-module=/path/to/ngx_devel_kit --add-module=/path/to/lua-nginx-module
make
make install

配置

• nginx代码实例

  location / {
  set $pass "127.0.0.1:6001";
  set $cache 0;
  set $fenxiLog 0;
  access_by_lua_file /usr/local/nginx/lua_modules/lua_router.lua;
  }   
  location @cache {
  include nginx_cache.conf;
  if ($fenxiLog = 1) {
      access_log /usr/local/nginx/logs/access.m.yohobuy.com.log  fenxi;
  }
  resolver 8.8.8.8;
  proxy_pass http://$pass;
  }   
  location @noCache {
  if ($fenxiLog = 1) {
      access_log /usr/local/nginx/logs/access.m.yohobuy.com.log  fenxi;
  }
  resolver 8.8.8.8;
  proxy_pass http://$pass;
  }

  所有nginx请求由location /处理，初始化后续逻辑用到的参数，并调用lua模块

• lua_router.lua lua处理模块

  package.path = "/usr/local/nginx/lua_modules/?.lua"
  local config = require("lua_config")
  for k, v in ipairs(config) do
  if ngx.re.match(ngx.var.uri, v.router) then
      ngx.var.cache = v.cache
      ngx.var.pass= v.proxy_pass
      ngx.var.fenxiLog = v.fenxiLog
      break;
  end
  end
  if ngx.var.cache == "1" then
  ngx.exec("@cache", ngx.var)
  else 
  ngx.exec("@noCache", ngx.var)
  end     

  lua导入配置文件中的路由配置，匹配到当前请求，获得配置数据（缓存配置需要分location内部转发，其他配置项通过变量返回到nginx作用域中）

• 以及lua配置文件 lua_config.lua

  local config = {
  {
      router = "/product/product/show_", --路由规则
      cache = 1,                         --是否缓存
      proxy_pass = "127.0.0.1:6001",     --反向url
      fenxiLog = 1                       --是否存储log（fenxi）
  },{ 
      router = "/boys",
      cache = 1, 
      proxy_pass = "127.0.0.1:6001",
      fenxiLog = 1
  },{ 
      router = "/girls",
      cache = 0, 
      proxy_pass = "127.0.0.1:6001",
      fenxiLog = 1
  },{ 
      router = "/home",
      cache = 1, 
      proxy_pass = "m.yohobuy.com",
      fenxiLog = 1
  }
  }
  return config

  返回到nginx的location中后根据lua返回变量值处理不同情况的请求