Zipkin 是一个分布式跟踪系统。 它有助于收集解决微服务架构中延迟问题所需的时序数据，并管理此数据的收集和查找。 Zipkin 的设计基于 Google Dapper 论文。
Zipkin 包括一个无依赖库和一个 spring-boot 服务器。 存储选项包括 in-memory、（mysql）、Cassandra 和 Elasticsearch 。
Zipkin 2.2 已发布，该版本专注于操作方面的改进：
modified the zipkin UI such that it can work behind reverse proxies which choose a different path prefix than '/zipkin'.
now have a comprehensive example setup including a Zipkin+Prometheus Grafana dashboard.
our docker JVM has been upgraded to 1.8.0_144 from 1.8.0_131
the zipkin-server no longer writes log messages about drop messages at warning level as it can fill up disk. Enable debug logging to see the cause of drops
elasticsearch storage will now drop on backlog as opposed to backing up, as the latter led to out-of-memory crashes under load surges.