《Apache Dubbo微服务开发从入门到精通》——可视化监测服务状态——三、 全链路追踪（4） https://developer.aliyun.com/article/1224190
d) 配置ObservationRegistry
e) 定制Observation Filters
To customize the tags present in metrics (low cardinality tags) and in spans (low and high cardinality tags) you should create your own versions of DubboServerObservationConvention (server side) and DubboClientObservationConvention (client side) and register them in the ApplicationModel's BeanFactory. To reuse the existing ones check DefaultDubboServerObservationConvention (server side) and DefaultDubboClientObservationConvention (client side).
Extension
a) 其他Micrometer Tracing Bridge
b) 其他Micrometer Tracing Exporter
Tanzu Observability by Wavefront
OpenZipkin Zipkin with Brave
An OpenZipkin URL sender dependency to send out spans to Zipkin via a URLConnectionSender
