WildFly 29 micrometer configuration

[Emond Papegaaij]

Hi,

The metrics provided by WildFly 29, pushed to the otlp-endpoint, all contain the tag 'job="wildfly"'. Is there any way to change the value of this tag? We would like to push information from 2 wildfly instances to a single otel-collector. Having both wildfly instances push this information with the same tag, will make it difficult to keep the two streams separate. We can configure 2 receiving endpoints in the otel-collector, but I'd much rather put this in the wildfly configuration.

Best regards,

Emond Papegaaij

[Brian Stansberry]

Apologies in advance if this doesn't work, as I'm pretty much guessing based on looking at a bit of source code, but does setting environmental variable OTEL_SERVICE_NAME to the values you want work?

WildFly sets a Micrometer OtlpConfig property named 'service.name' to 'wildfly', unless it's already configure, and if you set that env var Micrometer will use set service.name to that value and WildFly won't set it.

That's the only place I see where we pass in "wildfly" to the Micrometer code.

Best regards,

Brian

[Emond Papegaaij]

Hi Brian,

Thanks for taking the time to look into this. I also searched the source code for the origin of this value, but searching for 'job' and 'wildfly' is not an easy task in the WildFly source code. I'll give OTEL_SERVICE_NAME a try monday and report my findings.

Best regards,

Emond 

Op vr 8 sep. 2023 22:13 schreef Brian Stansberry <brian.st...@redhat.com>:

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[Emond Papegaaij]

Hi Brian,

You nailed it! The value of the environment variable OTEL_SERVICE_NAME is indeed used for the 'job' tag. This greatly simplifies the configuration we need on the side of the otel-collector.

Best regards,

Emond

Op vr 8 sep 2023 om 22:50 schreef Emond Papegaaij <emond.p...@gmail.com>:

[Brian Stansberry]

That's great, Emond! Thanks for posting back your results!

Best regards,

Brian