Jaeger add custom tag when storing the traces in the backend

Question

We have two Jaeger collectors deployed on two datacenters (A and B), these Jaeger collectors share the same Cassandra cluster as the backend.

Is there any way to add a custom tag like region=A or region=B to the traces in the Collector instances so that when I'm querying in the Jaeger UI, I can see where the trace is coming from?

Answer 1

You can use --collector.tags option for that.

$ docker run --rm jaegertracing/jaeger-collector:1.52.0 help | grep collector.tags
      --collector.tags string                                     One or more tags to be added to the Process tags of all spans passing through this collector. Ex: key1=value1,key2=${envVar:defaultValue}