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# 多测试环境样例说明
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## 一、部署结构
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<img src="./imgs/structs.png"/>
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如上图所示，一共有三个环境：
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1. 基线环境，包含 FrontService、MiddleService、BackendService
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2. feature1 环境，包含 MiddleService、BackendService
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3. feature2 环境，包含 FrontService、BackendService
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并且在入口处，部署网关服务。
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三条请求链路：
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1. 基线环境链路，Gateway -> FrontService(基线) -> MiddleService(基线) -> BackendService(基线)
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2. feature1 环境链路，Gateway -> FrontService(基线) -> MiddleService(feature1) -> BackendService(feature1)
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3. feature2 环境链路，Gateway -> FrontService(feature2) -> MiddleService(基线) -> BackendService(feature2)
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## 二、运行样例
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无需任何代码变更，直接启动 base、feature1、feature2、featureenv-gateway 下所有应用即可。
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应用默认指向北极星官方的体验环境，启动成功后可直接到体验站点查看服务注册数据。
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- 管控台地址： http://14.116.241.63:8080/
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- 账号：polaris
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- 密码：polaris
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## 三、测试
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### 方式一：客户端打标
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#### 基线环境链路
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````
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curl http://127.0.0.1:9999/featureenv-front-example/router/rest
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````
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响应结果（base 表示基线环境）
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````
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featureenv-front-example[base] -> featureenv-middle-example[base] -> featureenv-backend-example[base]
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````
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#### feature1 环境链路
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通过 X-Polaris-Metadata-Transitive-featureenv 请求头指定特性环境。
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````
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curl -H'X-Polaris-Metadata-Transitive-featureenv:feature1' http://127.0.0.1:9999/featureenv-front-example/router/rest
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````
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响应结果
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````
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featureenv-front-example[base] -> featureenv-middle-example[feature1] -> featureenv-backend-example[feature1]
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````
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#### feature2 环境链路
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通过 X-Polaris-Metadata-Transitive-featureenv 请求头指定特性环境。
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````
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curl -H'X-Polaris-Metadata-Transitive-featureenv:feature2' http://127.0.0.1:9999/featureenv-front-example/router/rest
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````
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响应结果
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````
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featureenv-front-example[feature2] -> featureenv-middle-example[base] -> featureenv-backend-example[feature2]
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````
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### 方式二：网关流量染色
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模拟一种实际的场景，假设客户端请求有一个 uid 请求参数，期望:
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1. uid=1000 的请求打到 feature1 环境
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2. uid=2000 的请求打到 feature2 环境
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3. 其它 uid 的请求打到基线环境
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**配置染色规则**
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配置地址：http://14.116.241.63:8080/#/filegroup-detail?group=featureenv-gateway&namespace=default
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修改 rule/staining.json 配置文件，填写以下规则:
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````json
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{
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"rules":[
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{
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"conditions":[
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{
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"key":"${http.query.uid}",
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"values":["1000"],
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"operation":"EQUAL"
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}
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],
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"labels":[
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{
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"key":"featureenv",
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"value":"feature1"
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}
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]
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},
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{
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"conditions":[
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{
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"key":"${http.query.uid}",
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"values":["2000"],
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"operation":"EQUAL"
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}
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],
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"labels":[
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{
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"key":"featureenv",
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"value":"feature2"
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}
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]
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}
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]
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}
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````
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填写完后发布配置即可。
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#### 基线环境链路
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````
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curl http://127.0.0.1:9999/featureenv-front-example/router/rest?uid=3000
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````
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响应结果（base 表示基线环境）
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````
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featureenv-front-example[base] -> featureenv-middle-example[base] -> featureenv-backend-example[base]
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````
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#### feature1 环境链路
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通过 X-Polaris-Metadata-Transitive-featureenv 请求头指定特性环境。
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````
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curl http://127.0.0.1:9999/featureenv-front-example/router/rest?uid=1000
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````
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响应结果
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````
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featureenv-front-example[base] -> featureenv-middle-example[feature1] -> featureenv-backend-example[feature1]
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````
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#### feature2 环境链路
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通过 X-Polaris-Metadata-Transitive-featureenv 请求头指定特性环境。
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````
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curl http://127.0.0.1:9999/featureenv-front-example/router/rest?uid=2000
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````
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响应结果
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````
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featureenv-front-example[feature2] -> featureenv-middle-example[base] -> featureenv-backend-example[feature2]
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````
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