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grayscale's Introduction

项目特性

  • 通过nginx + lua 实现动态切换upstream
  • 灰度用户路由到灰度的服务列表
  • 服务健康检查
  • 对外发布RESTful接口动态修改配置(通过WSSE进行认证)

使用说明

  • 安装nginx + lua环境,这里直接选择openrestry
  • 将源码lualib下的文件拷贝到/usr/local/openresty/lualib/firstep目录。(/usr/local/openresty为openrestry的默认安装路径)
  • 把conf、lua、config.json等文件及目录放置到nginx的conf目录下(如:/usr/local/openresty/nginx/conf),修改config.json权限为666
  • 修改/usr/local/openresty/nginx/conf/nginx.conf,如:
worker_processes  4;              #nginx worker 数量
error_log logs/error.log debug;   #指定错误日志文件路径,及日志级别
events {
    worker_connections 1024;
}

http {
    #STEP.1.在http模块引入conf/http_block.conf
    include conf/http_block.conf;
    #STEP.2.需要健康检查还得引入以下语句
    #include conf/http_block_healthcheck.conf;

    server {
        listen 80;

        location / {
            default_type text/plain;
            content_by_lua 'ngx.say("hello world!")';
        }

        location /ups1 {
            #STEP.3.设置当前location代理所对应的upstream,用ups变量设置
            set $ups 'ups1';
            proxy_pass http://dynamic_backend;
        }

        location /ups2 {
            set $ups 'ups2';
            proxy_pass http://dynamic_backend;
        }
    }
}

API说明

Servers

list server

curl http://ip:9527/servers
//返回格式:
{
    "normal": {
        "upstream1": [
            [
                "192.168.56.101", //服务ip
                8081,             //服务端口
                true,             //服务是否健康
                0                 //服务负载权重
            ],
            ...
        ],
        ...
    },
    "gray": {
        //和normal格式一样
    }
}

add server

curl -X POST -d "{\"gray\": true, \"upstream\":\"ups1\", \"servers\":[[\"10.10.1.1\", 8080]]}" http://ip:9527/servers

del server

curl -X DELETE -d "{\"gray\": true, \"upstream\":\"ups1\", \"servers\":[[\"10.10.1.1\", 8080]]}" http://ip:9527/servers

switch server

curl -X POST -d "{\"gray\": true, \"upstream\":\"ups1\", \"servers\":[[\"10.10.1.1\", 8080]]}" http://ip:9527/servers/switch

Users

list users

curl http://ip:9527/users

add users

curl -X POST -d "[\"username1\", \"username2\"]" http://ip:9527/servers

del server

curl -X DELETE -d "[\"username1\", \"username2\"]" http://ip:9527/servers

认证

WS-SE认证:APK KEY认证方式,校验请求消息头中“Appkey+AppSecret”进行鉴权。鉴权通过后,处理此条请求消息,否则返回鉴权失败原因

请求头

           
消息头字段说明
Authorization 取值为: WSSE realm="CLIENT1",profile="UsernameToken",type="Appkey"。
X-WSSE 取值为: UsernameToken Username="App Key的值", PasswordDigest="PasswordDigest的值", Nonce="随机数", Created="随机数生成时间"。
PasswordDigest:根据公式PasswordDigest = Base64 (SHA256 (Nonce + Created + Password))生成。其中,Password即App Secret的值。
Nonce:App发送请求时生成的一个不超过36位的随机数,允许是数字或字母。例如,QWERTYUIOPASDFGHJKLZXCVBNM1234567890。
Created:随机数生成时间。采用标准UTC格式,为yyyy-MM-dd'T'HH:mm:ss 'Z'。例如,2017-07-09T13:07:06Z。
其中,Appkey为DIC分配的应用接入密钥。App Secret为DIC分配的应用接入密钥密码。
Body-Sign 取值为:sign_type="HMAC-SHA256", signature= "加密后的值";
sign_type:加密方式,默认为"HMAC-SHA256"
signature:根据公式base64_encode(HMAC_SHA256(http body, key)生成;请求消息中key=appKey&appSecret&Nonce,响应消息中key=appKey&appSecret。Key中包含”&”

请求头样例

 Authorization: WSSE realm="CLIENT1", profile="UsernameToken", type="Appkey"
 X-WSSE: UsernameToken Username="", PasswordDigest="", Nonce="", Created=""
 Body-Sign: sign_type="HMAC-SHA256",signature="qwertyuiopasdfghjklZxcvbnnnnnnnnnnnm12234"

注意

   GET请求只校验appkey和appsecret。    非GET请求必须校验body-sign。

后续

  • 可视化后台
  • 自定义灰度路由规则
  • 流量限制
  • 请求数据聚合展示

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