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zipkin_tracing.html.md.erb
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---
title: Enabling Zipkin Tracing
owner: Routing
---
Zipkin is a tracing system that enables app developers to troubleshoot failures or latency issues. Zipkin provides the ability to trace requests and responses across distributed systems. See [Zipkin.io](http://zipkin.io/) for more information.
<%= partial vars.zipkin_enable %>
For more information about how the Gorouter works with HTTP headers and Zipkin tracing, see the [HTTP Headers](../concepts/http-routing.html#http-headers) section of the _HTTP Routing_ topic.
To trace app requests and responses in Cloud Foundry, apps must also log Zipkin headers.
After adding Zipkin HTTP headers to app logs, developers can use `cf logs myapp` to correlate the trace and span ids logged by the Gorouter with the trace ids logged by their app. To correlate trace IDs for a request through multiple apps, each app must forward appropriate values for the headers with requests to other applications.