Running an agent, how do I filter out some of the events

[gustaff-weldon]

We are running the service with agent via

ava -javaagent:path/to/opentelemetry-javaagent.jar \
     -jar myapp.jar

We did not exclude any instrumentations from the list (https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/docs/suppressing-instrumentation.md)

We would like to exclude reporting certain http calls made to the service, eg. we have a health /actuator/health which generates a lot of events eg.

I could not find any configuration for the Tomcat instrumentation (I believe that's the one that reports the events) in https://github.com/open-telemetry/opentelemetry-java-instrumentation/tree/main/instrumentation/tomcat

How can I drop the unnecessary reporting?

I'm looking for sth similar to what JS HTTP instrumentation offers:

      new HttpInstrumentation({
        ignoreIncomingPaths: [/\.well-known\/apollo\/server-health/],
      }),

How can I achieve that?

[mateuszrzeszutek]

Hey @gustaff-weldon,
You could try configuring a custom sampler using a javaagent extension, e.g. a RuleBasedRoutingSampler from the contrib repo.
Unfortunately the samplers project doesn't have documentation other than Javadocs, but perhaps something like this would suffice:

RuleBasedRoutingSampler.builder(SERVER, Sampler.parentBased(Sampler.alwaysOff))
  .drop(SemanticAttributes.HTTP_TARGET, "/actuator")
  .build()