w3c_tracing.html.md.erb

---
title: Enabling W3C tracing in Cloud Foundry
owner: CF for VMs Networking
---

<%# Reset page title based on platform type %>
<% if vars.platform_code != 'CF' %>

<% set_title("Enabling W3C tracing in", vars.app_runtime_abbr) %>

<% end %>


You can use W3C tracing to troubleshoot failures or latency issues in your apps. You can trace requests and responses
across distributed systems. For more information, see [w3c.org](https://www.w3.org/TR/trace-context/).

<% if vars.platform_code != "CF" %>

<%= partial "/pcf/core/w3c-pcf-config" %>

<% else %>

<%= partial "w3c_oss_config" %>

<% end %>

For more information about how the Gorouter works with HTTP headers and W3C tracing, see [HTTP headers for W3C tracing](../concepts/http-routing.html#w3c-headers) in _HTTP Routing_.

To trace app requests and responses in <%= vars.app_runtime_first %>, apps must also log W3C headers.

After adding W3C 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 apps.