oauth2: adding new client_secret_file parameter to http and opentelemetry

[fernandoalexandre]

Add oauth2.client_secret_file to http and opentelemetry property tables.

Related to: fluent/fluent-bit#12118

Summary by CodeRabbit

• Documentation
  • Added documentation for the optional oauth2.client_secret_file setting for Fluent Bit pipeline outputs.
  • Clarified that oauth2.client_secret_file overrides oauth2.client_secret when provided.
  • Updated HTTP and OpenTelemetry output plugin configuration details to include this new OAuth 2.0 option.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 1b778fb3-feb1-4197-bec5-785c8d5c1056

📥 Commits

Reviewing files that changed from the base of the PR and between 8a7669d and 2c6ed22.

📒 Files selected for processing (3)

• administration/configuring-fluent-bit/yaml/pipeline-section.md
• pipeline/outputs/http.md
• pipeline/outputs/opentelemetry.md

🚧 Files skipped from review as they are similar to previous changes (1)

• pipeline/outputs/http.md

---

📝 Walkthrough

Walkthrough

Documents the oauth2.client_secret_file setting in shared pipeline YAML, HTTP output, and OpenTelemetry output configuration tables, including that it overrides oauth2.client_secret.

Changes

OAuth 2.0 output documentation

Layer / File(s)	Summary
Document client secret file setting administration/configuring-fluent-bit/yaml/pipeline-section.md, pipeline/outputs/http.md, pipeline/outputs/opentelemetry.md	Adds the optional oauth2.client_secret_file setting and documents its precedence over oauth2.client_secret.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• fluent/fluent-bit-docs#2434: Adds the same OAuth 2.0 parameter to HTTP output documentation.
• fluent/fluent-bit-docs#2489: Documents related OAuth 2.0 client-credentials options in OpenTelemetry output documentation.

Suggested labels: 5.0

Suggested reviewers: eschabell

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: adding the oauth2 client_secret_file parameter to the HTTP and OpenTelemetry docs.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}

[eschabell]

@fernandoalexandre fixed a few vale issue and pushed the changes, now ready to merge once the code PR merges. Thanks for the docs PR!