How to disable the second HTTP listener on legacy endpoint 0.0.0.0:55681?

[rgl]

Is there a way to disable the second HTTP listener on legacy endpoint 0.0.0.0:55681?

At first I though this config would do the trick, but it does not:

distributor:
  receivers:
    # see https://github.com/grafana/tempo/blob/v1.2.1/modules/distributor/config.go#L33
    # see https://github.com/open-telemetry/opentelemetry-collector/tree/main/receiver/otlpreceiver
    otlp:
      protocols:
        grpc:
          endpoint: 0.0.0.0:4317
        http:
          endpoint: 0.0.0.0:4318

How do I disable the legacy endpoint 0.0.0.0:55681?

[mapno]

Hi! This is handled in the OTel receiver code. If the HTTP selected port is the default one (4318), it'll run with the legacy one (55681) as well. See code

		if r.cfg.HTTP.Endpoint == defaultHTTPEndpoint {
			r.settings.Logger.Info("Setting up a second HTTP listener on legacy endpoint " + legacyHTTPEndpoint)

			// Copy the config.
			cfgLegacyHTTP := r.cfg.HTTP
			// And use the legacy endpoint.
			cfgLegacyHTTP.Endpoint = legacyHTTPEndpoint
			err = r.startHTTPServer(cfgLegacyHTTP, host)
			if err != nil {
				return err
			}
		}

If you want not to listen on the legacy port, you will need to lister for HTTP in a different port (not 4318). Hope this helps!

[rgl]

Oh, that's unfortunate. I'll open an issue to prevent that from happening.

Thanks for pointing me to the source!

[rgl]

I've open open-telemetry/opentelemetry-collector#4565 to track this.