Allow to configure OTEL collector endpoint

[omerlh]

Preflight checklist

• I could not find a solution in the existing issues, docs, nor discussions.
• I agree to follow this project's Code of Conduct.
• I have read and am following this repository's Contribution Guidelines.
• This issue affects my Ory Network project.
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• I am signed up to the Ory Security Patch Newsletter.

Describe your problem

Provide a way to configure the OTEL (for example, Jaeger) collector endpoint. Looking at the code, it seems that no configuration is passed so the library will use the default - which is localhost.

Describe your ideal solution

A config option, like Jaeger or Zipkin, to specify the host and port.

Workarounds or alternatives

Not that I am aware of.

Version

latest

Additional Context

No response

[bodymindarts]

Blocker for us too. Should be a small change as otlptracehttp package supports passing in an endpoint as an option https://pkg.go.dev/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp#Option.

[bodymindarts]

In latest release of oath keeper + kratos the following config worked:

      tracing:
        service_name: oath keeper
        provider: otel
        providers:
          otlp:
            server_url: <otel-endpoint>:4318
            insecure: true

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[alnr]

This is fixed I believe, but beware #778