一、需求
项目中有这样一个接口:使用get或post方式支持单个或批量的手机号加解密。
使用Jmeter做性能测后发现,当批量加解密超过100个手机号时,吞吐量只有260左右【2颗E5CPU总计32核+128G DDR3】,所以我们想在nginx中通过lua实现如下功能:当手机号大于100个,用nginx-upstream-A,反之用nginx- upstream-B,A和B两者互不影响。
二、设计
三、配置及代码实现
1)server.conf
server {
listen 80;
server_name chow.com.cn;
access_log /data/nginx/1.4.1/logs/chow/access.log main;
set $target 'b.chow.com.cn';
#支持lua中获取request_body_data
lua_need_request_body on;
location / {
#超时重试
proxy_connect_timeout 60;
proxy_send_timeout 60;
proxy_read_timeout 60;
proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
proxy_next_upstream_tries 2;
rewrite_by_lua_file /usr/local/nginx/conf/lua/proxy_pass_choice.lua;
proxy_pass http://$target/;
}
}
2)upstream.conf
upstream a.chow.com.cn{
server 127.0.0.1:10001 weight=60;
server 127.0.0.1:11001 weight=60;
}
upstream b.chow.com.cn{
server 127.0.0.1:12001 weight=60;
server 127.0.0.1:13001 weight=60;
}
3)proxy_pass_choice.lua
local maxGetMethodUriArgsLength = 1024;
local maxPostMethodUriArgsLength = 1024;
local batchTarget = "a.chow.com.cn";
function getStringLength(str)
if str == nil then
return 0;
else
return string.len(str);
end
end
function setTarget()
if (ngx.req.get_method() == "GET")
then
if (getStringLength(ngx.var.args) > maxGetMethodUriArgsLength) then
ngx.var.target = batchTarget;
end
else
if (getStringLength(ngx.req.get_body_data()) > maxPostMethodUriArgsLength) then
ngx.var.target = batchTarget;
end
end
end
function exceptionHandle(err)
ngx.log(ngx.ERR, err);
end
--添加异常处理
xpcall(setTarget, exceptionHandle);