ABTestingGateway简介
ABTestingGateway 是新浪开源的一个可以动态设置分流策略的灰度发布系统,工作在7层,基于nginx和ngx-lua开发,使用 redis 作为分流策略数据库,可以实现动态调度功能。
nginx是目前使用较多的7层服务器,可以实现高性能的转发和响应;ABTestingGateway 是在 nginx 转发的框架内,在转向 upstream 前,根据 用户请求特征 和 系统的分流策略 ,查找出目标upstream,进而实现分流。
环境搭建
1.安装openresty
其是由Nginx核心加很多第三方模块组成,其最大的亮点是默认集成了Lua开发环境,使得Nginx可以作为一个Web Server使用。借助于Nginx的事件驱动模型和非阻塞IO,可以实现高性能的Web应用程序。而且OpenResty提供了大量组件如Mysql、Redis、Memcached等等,使在Nginx上开发Web应用更方便更简单。目前在京东如实时价格、秒杀、动态服务、单品页、列表页等都在使用Nginx+Lua架构,其他公司如淘宝、去哪儿网等。
安装命令:brew install openresty
brew默认将openresty安装在/usr/local/Cellar/openresty/
目录下
2.安装luajit
JIT = Just In Time即时编译,是动态编译的一种形式,是一种优化虚拟机运行的技术。
程序运行通常有两种方式,一种是静态编译,一种是动态解释,即时编译混合了这二者。Java和.Net/mono中都使用了这种技术。
安装命令:brew install LuaJIT
brew默认将openresty安装在/usr/local/Cellar/luajit/
目录下
3.安装redis
安装命令:brew install redis
启动命令:brew services start redis
ABTestingGateway搭建
项目下载:
命令:git clone https://github.com/CNSRE/ABTestingGateway.git
下载后目录结果如下
repo中的utils/conf文件夹中有灰度系统部署所需的最小示例
运行灰度网关
1. 进入ABTestingGateway目录
2. 创建logs目录,mkdir logs
3. 启动redis
4.
# 启动upstream server,其中stable为默认upstream
4. /usr/local/Cellar/openresty/1.13.6.2/nginx/sbin/nginx -p `pwd` -c conf/stable.conf
5. /usr/local/Cellar/openresty/1.13.6.2/nginx/sbin/nginx -p `pwd` -c conf/beta1.conf
6. /usr/local/Cellar/openresty/1.13.6.2/nginx/sbin/nginx -p `pwd` -c conf/beta2.conf
7. /usr/local/Cellar/openresty/1.13.6.2/nginx/sbin/nginx -p `pwd` -c conf/beta3.conf
8. /usr/local/Cellar/openresty/1.13.6.2/nginx/sbin/nginx -p `pwd` -c conf/beta4.conf
# 启动灰度系统,proxy server,灰度系统的配置也写在conf/nginx.conf中
9. /usr/local/Cellar/openresty/1.13.6.2/nginx/sbin/nginx -p `pwd` -c conf/nginx.conf
简单验证:添加分流策略组
$ curl 127.0.0.1:8080/ab_admin?action=policygroup_set -d '{"1":{"divtype":"uidsuffix","divdata":[{"suffix":"1","upstream":"beta1"},{"suffix":"3","upstream":"beta2"},{"suffix":"5","upstream":"beta1"},{"suffix":"0","upstream":"beta3"}]},"2":{"divtype":"arg_city","divdata":[{"city":"BJ","upstream":"beta1"},{"city":"SH","upstream":"beta2"},{"city":"XA","upstream":"beta1"},{"city":"HZ","upstream":"beta3"}]},"3":{"divtype":"iprange","divdata":[{"range":{"start":1111,"end":2222},"upstream":"beta1"},{"range":{"start":3333,"end":4444},"upstream":"beta2"},{"range":{"start":7777,"end":2130706433},"upstream":"beta2"}]}}'
{"desc":"success ","code":200,"data":{"groupid":0,"group":[0,1,2]}}
分流规则简介
- ABTestingGateway灰度系统目前支持的策略有ip段分流、用户uid段分流、uid尾数分流、uid白名单分流
- 优先级由数字表示,从1开始,级别为1的策略优先级最高
以下共添加了3个分流规则,分别是用户uid尾数分流、城市分流、ip段分流,具体请看json中的注释
stable服务为默认的,未匹配到规则则分流到stable服务器上
{
"1": {
"divtype": "uidsuffix",
"divdata": [
{
"suffix": "1", //http请求中header X-Uid尾数为1分流到beta1服务器
"upstream": "beta1"
},
{
"suffix": "3", //http请求中header X-Uid尾数为3分流到beta2服务器
"upstream": "beta2"
},
{
"suffix": "5",
"upstream": "beta1"
},
{
"suffix": "0",
"upstream": "beta3"
}
]
},
"2": {
"divtype": "arg_city",
"divdata": [
{
"city": "BJ", // url上参数city=BJ,分流到beta1
"upstream": "beta1"
},
{
"city": "SH",
"upstream": "beta2"
},
{
"city": "XA",
"upstream": "beta1"
},
{
"city": "HZ",
"upstream": "beta3"
}
]
},
"3": {
"divtype": "iprange",
"divdata": [
{
"range": {
"start": 1111,
"end": 2222
},
"upstream": "beta1"
},
{
"range": {
"start": 3333,
"end": 4444
},
"upstream": "beta2"
},
{
"range": {
"start": 7777,
"end": 2130706433
},
"upstream": "beta2"
}
]
}
}
简单验证:设置运行时策略
$ curl "127.0.0.1:8080/ab_admin?action=runtime_set&hostname=api.weibo.cn&policygroupid=0"
# 分流
$ curl 127.0.0.1:8030 -H 'X-Uid:39' -H 'X-Real-IP:192.168.1.1'
this is stable server
$ curl 127.0.0.1:8030 -H 'X-Uid:30' -H 'X-Real-IP:192.168.1.1'
this is beta3 server
$ curl 127.0.0.1:8030/?city=BJ -H 'X-Uid:39' -H 'X-Real-IP:192.168.1.1'
this is beta1 server
注意
报错:
2018/07/11 22:00:39 [error] 65912#7287282: *34 lua entry thread aborted: runtime error: ../lib/lua-resty-core/lib/ngx/semaphore.lua:64: dlsym(RTLD_DEFAULT, ngx_http_lua_ffi_semaphore_new): symbol not found
stack traceback:
coroutine 0:
[C]: in function 'require'
.../Nginx/ABTestingGateway/utils/../diversion/diversion.lua:11: in function <.../Nginx/ABTestingGateway/utils/../diversion/diversion.lua:1>, client: 127.0.0.1, server: api.weibo.cn, request: "GET / HTTP/1.1", host: "127.0.0.1:8030"
原因:
brew安装的openresty版本与ABTestingGateway不一致导致的,将/usr/local/Cellar/openresty/1.13.6.2/lualib (1.13.6.2替换为您安装的版本)下的相关的lua文件拷贝覆盖ABTestingGateway/lualib下的文件,重启nginx即可