How to disable specific library instrumentation for NodeJS ?

[santoshkashyap]

Hi,

I have setup opentelemetry-operator on our cluster. For NodeJS workload on the cluster I have added the pod annotation :

# (namespace/instrumentation CR name)
annotations:
  instrumentation.opentelemetry.io/inject-nodejs: cls-opentelemetry/opentelemetry-instrumentation

I have configured daemonset for instrumentation. So far everything works fine, but the auto-instrumentation generates lots of spans for our NodeJS application. I'm only interested in spans from the library @opentelemetry/instrumentation-http and not others. So is it possible to disable auto-instrumentation for other libraries eg: @opentelemetry/instrumentation-connect via env variables or even better if could setup the auto-instrumentation only for specific libraries as required?

I checked instrumentation-spec-nodejs to add specific env via instrumentation CR, but not sure how to pass specific library as a value ?

For JavaAgent based instrumentation, disabling auto-instrumentation for specific library already seems to be possible as explained in suppressing-specific-agent-instrumentation. Something like this for NodeJS would be nice . Thanks in advance!

Best,
Santosh

[mat-rumian]

Hey @santoshkashyap,
as you mentioned it's possible to disable specific instrumentation in case of OpenTelemetry Auto Instrumentation for Java (javaagent). For NodeJS it's not possible at least on the environment variables configuration level.

OpenTelemetry Operator is a "client" of OpenTelemetry upstream instrumentation. So if you would like to have this kind of functionality I think you should create an issue in OpenTelemetry JS Contrib repository and ask for changes in @opentelemetry/auto-instrumentations-node package.

[santoshkashyap]

@mat-rumian , Thank you for your answer. I will create a request on the auto-instrumentation package.

[mderazon]

Hi. I also would like to disable an instrumentation. Seems like @opentelemetry/instrumentation-fs is causing a lot of unnecessary traces and is recommended to be disabled:
open-telemetry/opentelemetry-js-contrib#1344 (comment)

It's possible to disable it via node auto instrumentation:
open-telemetry/opentelemetry.io#2988 (review)

https://github.com/open-telemetry/opentelemetry.io/blob/16328c6c00bb5c163f200b22ef90b881a80a86d1/content/en/docs/languages/js/libraries.md?plain=1#L145-L154

But I am not sure how to do it through otel operator ?