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  • Mac下使用ABTestingGateway快速搭建灰度网关

    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

    ABTestingGateway目录结构

    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

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  • 原文地址:https://www.cnblogs.com/cl2Blogs/p/9608945.html
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