This has been merged: Added trace id logging by joe-elliott · Pull Request #700 · grafana/tempo · GitHub
You can test it out using image:
grafana/tempo:91b41f1b
It requires setting the flag:
distributor:
log_received_traces: true
--distributor.log-received-traces=true
Note that this logs all trace ids and spans ids so is for debugging only. Also this logs those ids before rate limiting and pushing to the ingesters. So we should keep an eye on our logs to make sure we’re not getting failures.