AlexStocks commented on a change in pull request #119:
URL: https://github.com/apache/dubbo-go-samples/pull/119#discussion_r637556605
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File path: openzipkin/README.md
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@@ -0,0 +1,174 @@
+# Zipkin in Dubbo-go Example
+
+## Backend
+
+Zipkin is a distributed tracing system. It helps gather timing data needed to
troubleshoot latency problems in service architectures. Features include both
the collection and lookup of this data.
+
+## Introduction
+
+```markdown
+.
+├── README.md
+├── README_zh.md
+├── docker-compose.yml
+├── go-client
+├── go-server-a
+├── go-server-b
+└── prometheus
+```
+
+- go-client ：The Service Consumer
+- go-server-a ：The Service Provider A
+- go-server-b ：The Service Provider B
+
+Client calls ProviderA , and then calls ProviderB,
+ProviderA also makes a request to ProviderB！
+
+依赖关系：
+
+
+## Code
+
+register Zipkin. Reporter，Endpoint，Tracer，default sample `AlwaysSample`
+
+```go
+func registerZipkin() {
+ // set up a span reporter
+ reporter := zipkinhttp.NewReporter("http://localhost:9411/api/v2/spans";)
+
+ // create our local service endpoint
+ endpoint, err := zipkin.NewEndpoint("go-server-a", "localhost:80")
+ if err != nil {
+ gxlog.CError("unable to create local endpoint: %+v\n", err)
+ }
+
+ // set sampler , default AlwaysSample
+ // sampler := zipkin.NewModuloSampler(1)
+
+ // initialize our tracer
+ // nativeTracer, err := zipkin.NewTracer(reporter,
zipkin.WithLocalEndpoint(endpoint), zipkin.WithSampler(sampler))
+ nativeTracer, err := zipkin.NewTracer(reporter,
zipkin.WithLocalEndpoint(endpoint))
+ if err != nil {
+ gxlog.CError("unable to create tracer: %+v\n", err)
+ }
+
+ // use zipkin-go-opentracing to wrap our tracer
+ tracer := zipkinot.Wrap(nativeTracer)
+
+ // optionally set as Global OpenTracing tracer instance
+ opentracing.SetGlobalTracer(tracer)
+}
+```
+
+## Config
+
+Provider config filter：
+
+```yaml
+
+services:
+ ...
+filter: "tracing"
+
+```
+
+## Filter
+
+Dubbo-go support `opentrace filter` 实现，基于简单配置即可
Review comment:
Dubbo-go supports `opentrace filter`.
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