Envoy: Accessing tracing information within an HTTP Filter

Created on 8 Sep 2020  路  2Comments  路  Source: envoyproxy/envoy

Hi, I'm attempting to access the tracing information generated by the HTTP connection manager within one of our custom HTTP filters. Is there any way to access the active trace within an HTTP filter? Or is that not propagated down to a level that's accessible to the filter?

I've tried setting or getting the x-b3-* headers but those also seem to not be available.

Specifically I'm looking for the span id and the trace id.

Thanks for any tips!

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picture cyran-ryan

Most helpful comment

See this API: https://github.com/envoyproxy/envoy/blob/83578ec2760ec823de92200cf169bca2903513a0/include/envoy/http/filter.h#L239

picture mattklein123 on 8 Sep 2020
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See this API: https://github.com/envoyproxy/envoy/blob/83578ec2760ec823de92200cf169bca2903513a0/include/envoy/http/filter.h#L239

mattklein123 picture mattklein123 on 8 Sep 2020
👍2

Thanks so much! That's what I was looking for and some how missed it.

cyran-ryan picture cyran-ryan on 9 Sep 2020
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