tracer : handleTrace func() pass header to ctx

[liguozhong]

fix tempo issue. https://github.com/grafana/tempo/issues/495 https://github.com/grafana/tempo/issues/1381

vendor/go.opentelemetry.io/collector/receiver/otlpreceiver/otlphttp.go:47

tempo interface

[bogdandrutu]

@liguozhong please mention the version you use of the collector module?

[liguozhong]

@liguozhong please mention the version you use of the collector module?

@bogdandrutu ,hi ,Thank you for your patience. v0.48.0,I fork a version based on v0.48.0. After adding this header, tenantID can be received in tempo. It is expected that the header can also be passed to the downstream system in the opentelemetry-collector/main branch

https://github.com/liguozhong/opentelemetry-collector/commit/3f6214ee68930a23a656df9ea739e6b6ef457992

https://github.com/liguozhong/opentelemetry-collector/tree/v48_header

replace go.opentelemetry.io/collector => github.com/liguozhong/opentelemetry-collector v0.20.1-0.20220414164352-3f6214ee6893

[bogdandrutu]

@liguozhong seems that you use a version from 2y ago:

1. https://github.com/grafana/tempo/blob/main/go.mod#L243
2. https://github.com/grafana/opentelemetry-collector

Based on this, I think you should first get closer to our current version, because I believe that this is actually fixed.

[jpkrohling]

I would also need the config file used for that. When using the batching processor, for instance, this information will be lost.