 tracing integrations, Envoy (the sidecar proxy) sends tracing information directly to tracing backends on behalf of the applications being proxied.</p><p>Envoy:</p><ul><li>generates request IDs and trace headers (i.e., <code>X-B3-TraceId</code>) for requests as they flow through the proxy</li><li>generates trace spans for each request based on request and response metadata (i.e., response time)</li><li>sends the generated trace spans to the tracing backends</li><li>forwards the trace headers to the proxied