目标
使用在nginx中使用lua访问redis数据库。不需要安装lua环境。
安装依赖环境
yum -y install gcc zlib zlib-devel pcre-devel openssl openssl-devel
安装LuaJIT
cd /usr/local/
mkdir LuaJIT
cd /usr/local/LuaJIT
wget http://luajit.org/download/LuaJIT-2.0.5.tar.gz
tar –xvf LuaJIT-2.0.5.tar.gz
cd LuaJIT-2.0.5
make install
安装完成
如果安装时提示找不到wget命令,可以执行yum install wget
这里需要将lib库加到配置中,否则后边会出现找不到库的错误:
# cat /etc/ld.so.confinclude ld.so.conf.d/*.conf# echo "/usr/local/lib" >> /etc/ld.so.conf# ldconfig
安装nginx
cd /usr/local/
mkdir nginx
下载ngx_devel_kit
wget https://github.com/simpl/ngx_devel_kit/archive/v0.3.0.tar.gz
下载lua-nginx-module
wget https://github.com/openresty/lua-nginx-module/archive/v0.10.14rc1.tar.gz
下载nginx
wget http://nginx.org/download/nginx-1.15.5.tar.gz
解压文件
tar -xvf v0.3.0.tar.gz
tar -xvf v0.10.14rc1.tar.gz
tar -xvf nginx-1.15.5.tar.gz
编译nginx
cd nginx-1.12.1
./configure --prefix=/usr/local/nginx --add-module=../ngx_devel_kit-0.3.0 --add-module=../lua-nginx-module-0.10.14rc1
安装
make
make install
或者合并两个命令(4表示并行运行任务的数量)
make -j 4 && make install
启动nginx
cd /usr/local/nginx/sbin
./nginx
提示找不到luajit的库,需要配置一下
再次启动nginx,启动成功
测试lua配置
修改nginx配置文件nginx.conf:
添加红色区域的内容:
location /lua {
default_type text/plain;
content_by_lua 'ngx.say("Hello, Lua!") ';
}
重新加载配置文件:./nginx -s reload
访问http://ip/lua
说明基本配置成功了。nginx+lua搞定
redis安装
cd /usr/local
mkdir redis
下载
wget http://download.redis.io/releases/ redis-2.8.17.tar.gz
解压
tar -xvf redis-2.8.17.tar.gz
进入解压后的文件夹
cd redis-2.8.17
安装
make
启动redis(&表示后台运行)
cd src
./redis-server &
启动成功后按ctrl+c退出启动界面
测试
./redis-cli
set foo liq ---OK
get foo ---liq
关闭redis
SHUTDOWN
安装lua-resty-redis
从https://github.com/openresty/lua-resty-redis.git下载lua-resty-redis-master后解压
将lib包安装到lua库
解压:
安装
说明库已经安装到/usr/local/lib/lua目录下了
安装完成之后在/usr/local/lib/lua/resty里面会有redis.lua
测试nginx+lua+redis
修改nginx的配置文件nginx.conf
在http中添加以上内容
添加以下两个location,用来测试对redis的访问:
#测试lua set数据到redis
location /lua/set {
default_type text/plain;
content_by_lua_file conf/lua/setKeyValue.lua;
}
#测试lua get数据从redis
location /lua/get {
default_type text/plain;
content_by_lua_file conf/lua/getKey.lua;
}
然后在nginx的conf目录下创建lua目录,lua目录下创建两个文件setKeyValue.lua和getKey.lua
分别编辑setKeyValue.lua文件和getKey.lua文件:
setKeyValue.lua:
--receive request params local request_method = ngx.var.request_method local args = nil local key = nil local value = nil --获取参数的值 if "GET" == request_method then args = ngx.req.get_uri_args() elseif "POST" == request_method then ngx.req.read_body() args = ngx.req.get_post_args() end key = args["key"] value = args["value"] --connect redis local redis = require "resty.redis" local cache = redis.new() local ok, err = cache.connect(cache, '127.0.0.1', '6379') cache:set_timeout(60000) if not ok then ngx.say("failed to connect:", err) return end -- 请注意这里 auth 的调用过程 -- check password local count count, err = cache:get_reused_times() if 0 == count then ok, err = cache:auth("mide123") if not ok then ngx.say("failed to auth: ", err) return end elseif err then ngx.say("failed to get reused times: ", err) return end local res, err = cache:set(key, value) if not res then ngx.say("failed to set "..key..": ", err) return end if res == ngx.null then ngx.say(key.." not found.") return end ngx.say("set redis value >>> "..key..": ", res) local ok, err = cache:close() if not ok then ngx.say("failed to close:", err) return end
getKey.lua:
--receive request params local request_method = ngx.var.request_method local args = nil local key = nil local value = nil --获取参数的值 if "GET" == request_method then args = ngx.req.get_uri_args() elseif "POST" == request_method then ngx.req.read_body() args = ngx.req.get_post_args() end key = args["key"] --connect redis local redis = require "resty.redis" local cache = redis.new() local ok, err = cache.connect(cache, '127.0.0.1', '6379') cache:set_timeout(60000) if not ok then ngx.say("failed to connect:", err) return end -- 请注意这里 auth 的调用过程 -- check password local count count, err = cache:get_reused_times() if 0 == count then ok, err = cache:auth("mide123") if not ok then ngx.say("failed to auth: ", err) return end elseif err then ngx.say("failed to get reused times: ", err) return end local res, err = cache:get(key) if not res then ngx.say("failed to get "..key..": ", err) return end if res == ngx.null then ngx.say(key.." not found.") return end ngx.say("get from redis >>> "..key..": ", res) local ok, err = cache:close() if not ok then ngx.say("failed to close:", err) return end
重启nginx
访问/lua/set,需要加参数:
打开redis客户端查看结果或者使用redis命令
测试/get/key访问,需加参数:
至此,nginx+lua+redis配置成功,测试成功。可以使用lua脚本实现强大的功能了。