added Chinese readme for tracing/grpc (#133)
Co-authored-by: Chenming Shi <cshi0@ChenmingdeMacBook-Pro.local>
diff --git a/tracing/grpc/README_zh.md b/tracing/grpc/README_zh.md
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+### 1. 利用docker运行jaeger
+
+[jaeger-getting-started](https://www.jaegertracing.io/docs/1.17/getting-started/)
+
+使用 [all-in-one](https://hub.docker.com/r/jaegertracing/all-in-one) 镜像
+
+### 2. 启动zookeeper
+
+### 3. 启动服务端
+
+设置Jaeger环境变量
+```
+CONF_PROVIDER_FILE_PATH=xxxxxxxxxxxxx
+JAEGER_AGENT_PORT=32769
+JAEGER_AGENT_HOST=localhost
+JAEGER_SERVICE_NAME=GrpcServer
+JAEGER_SAMPLER_PARAM=1
+```
+
+具体细节详见：[jaeger-environment-variables](https://github.com/jaegertracing/jaeger-client-go#environment-variables)
+
+另：
+- JAEGER_SAMPLER_PARAM必须要设置成```1```，意味着100%的请求会被用于取样，如果是```0.9```就是90%会被取样
+- JAEGER_AGENT_PORT=32769，32769是docker发布的端口，这个端口会被映射到6831，golang客户端需要使用6831来发送追踪数据。
+
+然后运行服务端。
+
+### 4. 运行客户端
+
+设置Jaeger环境变量
+```
+CONF_PROVIDER_FILE_PATH=xxxxxxxxxxxxx
+JAEGER_AGENT_PORT=32769
+JAEGER_AGENT_HOST=localhost
+JAEGER_SERVICE_NAME=GrpcServer
+JAEGER_SAMPLER_PARAM=1
+```
+
+然后启动客户端，见[README](https://github.com/dubbogo/dubbo-samples/blob/master/golang/README.md)。
+
+### 5. 在JAEGER-UI中查看追踪数据
+
+打开[http://localhost:32768/search](http://localhost:32768/search)
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