安装redis

下载

wget http://download.redis.io/releases/ redis-5.0-rc4.tar.gz

 解压安装配置

make, sudo make install

运行redis

配置文件：redis.conf可以编辑相关内容，默认端口是6379

启动redis

切换到 redis解压的目录的src下面执行 ./redis-server & 使其后台运行

1、对应的nginx.conf配置如下，需要在http模块中添加如下配置，不然在redis.lua中引入的包会报找不到对应的引用错误。

http {   lua_package_path   "/usr/local/openresty/nginx/conf/waf/?.lua;/usr/local/openresty/lualib/resty/?.lua;;";   lua_package_cpath "/usr/local/openresty/lualib/?.so;;";   lua_shared_dict limit 10m;   init_by_lua_file /usr/local/openresty/nginx/conf/waf/init.lua;   access_by_lua_file /usr/local/openresty/nginx/conf/waf/waf.lua;......其他省略.........}

2、nginx_lua 如何连接redis，对应的lua脚本（redis.lua）如下。

local cjson = require "cjson"local redis = require "resty.redis" -- 是否需要开启redis的日志attackredislog = "on"--log存储目录，该目录需要用户自己新建，切需要用户的可写权限logdir = "/usr/local/openresty/nginx/logs/hack/"function redislog(method,data)    if attackredislog then	    local servername=ngx.var.server_name		line = ""..method.." \""..data.."\" \n"        local filename = logdir..'/'..servername.."_"..ngx.today().."_redis.log"        write(filename,line)    endendfunction write(logfile,msg)    local fd = io.open(logfile,"ab")    if fd == nil then return end    fd:write(msg)    fd:flush()    fd:close()end--------------------------------------------------------local function close_redis(red)    if not red then        return    end    --释放连接(连接池实现)    local pool_max_idle_time = 10000 --毫秒    local pool_size = 100 --连接池大小    local ok, err = red:set_keepalive(pool_max_idle_time, pool_size)     if not ok then	   redislog("redis keepalive","set redis keepalive error,"..err.."")    endend local red = redis:new()red:set_timeout(1000)local ip = "127.0.0.1"local port = 6379local ok, err = red:connect(ip,port)if not ok then    return close_redis(red)endfunction setRedis(key, val)  local ok, err = red:set(key, val)   -- 设置值的有效期为60秒   ok, err = red:expire(key,60)   if not ok then    redislog("redis set","failed to set "..key..","..err.."")    return    endend function getRedis(key)    local res, err = red:get(key)    if not res then	redislog("redis get","failed to get,"..err.." ")    return    end   if res == ngx.null then    redislog("redis get"," "..key.." not found")    return nil  else    return res  endendlocal ck = ngx.var.http_cookielocal scheme = ngx.var.scheme  local server_name = ngx.var.server_namelocal request_uri = ngx.var.request_urilocal server_port = ngx.var.server_portlocal url = scheme.."://"..server_name..":"..server_port..request_urilocal valueif (ck ~= nil) then value = getRedis(ck)endclose_redis(red)