How to use Jmx exporter JavaAgent as a sidecar container

[tantan hngo]

As title suggests, I want to run the javaagent in the same pod as our Tomcat.
How do I run the javaagent commands towards our .war file that is in the other container?

I tried just running the agent by itself and let it listen on the port that we've defined in our tomcat to expose its JMX but nothing.

I get various errors depending on how I do things like; httpserverclass missing error, no main manifest attribute in jmx_prom_javagent.jar etc

Any ideas? <3

[Doug Hoard]

The Java agent version (jmx_prometheus_javaagent.jar) is meant to run as an agent attached to the application (in your case Tomcat.) If you want to run as a sidecar, I suspect you want the standalone version (jmx_prometheus_httpserver.jar.)

The integration tests have good examples of usage.

Java agent usage:

https://github.com/prometheus/jmx_exporter/tree/release-0.19.0/integration_test_suite/integration_tests/src/test/resources/io/prometheus/jmx/test/MinimalTest/JavaAgent

Standalone usage:

https://github.com/prometheus/jmx_exporter/tree/release-0.19.0/integration_test_suite/integration_tests/src/test/resources/io/prometheus/jmx/test/MinimalTest/Standalone