Remove reference to COLLECTOR_OTLP_ENABLED env var for Jaeger

[mabartos]

In the OTel Tracing guide, there is a reference to the COLLECTOR_OTLP_ENABLED env var, which should enable OTLP receivers. However, with regard to the more recent Jaeger all-in-one documentation, it should not be needed.

Also, the link to the blog does not properly reflect the present as it is already quite old and users should rather visit official OTel docs.

Could you please check this small improvement? Thanks!

[quarkus-bot]

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It should be safe to merge provided you have a look at the other checks in the summary.

[github-actions]

🎊 PR Preview 35f4c4a has been successfully built and deployed to https://quarkus-pr-main-42542-preview.surge.sh/version/main/guides/

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[brunobat]

I've tried the PR and the code does not work well...
For some reason the lates jaeger-all-in-one does not ingest the spans and causes errors on the exporter.
Can you please take a look?

[mabartos]

@brunobat Sorry, I'll take a look at it this week. When I tried it, everything was working as expected, but I'll verify it once again.

[mabartos]

@brunobat I tried to start the image all-in-one without the COLLECTOR_OTLP_ENABLED env var, and everything works properly in our Keycloak environment. All traces/spans are successfully exported to the Jaeger, as I can see them in the Jaeger UI.

BTW. is there any reason why the docker-compose is used in the guide as it uses only one service/image? Might it be probably better to put some docker/podman example?

[brunobat]

We can replace it by a docker run... I can't remember a particular reason for the composer apart from the legibility.
Will not have bandwidth in the next 2 week.

[cescoffier]

@brunobat Did you have the time to look at it?

[brunobat]

Sorry, no.