Update distributed-tracing.mdx with caveat on 128 bit IDs (#12196)

* Update distributed-tracing.mdx
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Luke Kysow 2022-01-26 10:39:33 -08:00 committed by GitHub
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@ -238,3 +238,25 @@ config to take effect.
Envoy not yet having support.
1. Tracing is only supported with Envoy proxies, not the built-in proxy.
1. When configuring the Zipkin tracer in `envoy_tracing_json`, set [`trace_id_128bit`](https://www.envoyproxy.io/docs/envoy/v1.21.0/api-v3/config/trace/v3/zipkin.proto#envoy-v3-api-field-config-trace-v3-zipkinconfig-trace-id-128bit) to `true` if your application is configured to generate 128-bit trace IDs. For example:
<CodeBlockConfig highlight="10">
```json
{
"http": {
"name": "envoy.tracers.zipkin",
"typedConfig": {
"@type": "type.googleapis.com/envoy.config.trace.v3.ZipkinConfig",
"collector_cluster": "zipkin",
"collector_endpoint_version": "HTTP_JSON",
"collector_endpoint": "/api/v2/spans",
"shared_span_context": false,
"trace_id_128bit": true
}
}
}
```
</CodeBlockConfig>