out_azure_kusto: lower the severity of a noisy diagnostic log

[Nicusor97]

Lower the severity of a noisy diagnostic log in the azure_kusto output plugin from info to debug to reduce log spam after upgrading to Fluent Bit 4.0.10.

Starting with Fluent-Bit 4.0.10 we noticed this log being generated by the engine and after further investigation it seems to be more a debug log.

[2025/10/03 09:00:08] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:00:33] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:01:04] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:01:08] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:01:13] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:01:28] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:01:33] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:01:43] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:01:48] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:01:53] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:02:03] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:02:08] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:02:13] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:02:28] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:02:33] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:02:58] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:03:08] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:03:13] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:03:18] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:03:23] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:03:28] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:03:33] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:04:08] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:04:28] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:04:33] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:04:48] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:05:08] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:05:13] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:05:28] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:05:33] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:05:48] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:06:03] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0
[2025/10/03 09:06:08] [ info] [output:azure_kusto:azure_kusto.1] azure_kusto: before calling azure storage api :: value of set io_timeout is 0

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Fluent Bit is licensed under Apache 2.0, by submitting this pull request I understand that this code will be released under the terms of that license.

Summary by CodeRabbit

• Chores
  • Lowered a diagnostic log message to debug level during Azure storage ingestion to reduce noise in default info logs.
  • Keeps normal operational logs cleaner while retaining detailed diagnostics when debug logging is enabled.
  • No functional or behavioral changes to ingestion workflows.
  • No configuration changes required; existing setups continue to work as before.

[coderabbitai]

Walkthrough

Adjusted a diagnostic log message in azure_kusto_create_blob from info to debug in plugins/out_azure_kusto/azure_kusto_ingest.c. No control-flow, API-call behavior, or public/exported interfaces were changed.

Changes

Cohort / File(s)	Summary of changes
Logging verbosity adjustment plugins/out_azure_kusto/azure_kusto_ingest.c	Changed a diagnostic log level from info to debug before the Azure storage API call.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

I twitch my ears at logs that flow,
From info down to debug’s glow.
A softer whisper in the night,
Same burrow, same steady byte.
I nibble bytes and keep it neat—
Less chatter, still a clean hop-beat. 🐇

Pre-merge checks and finishing touches

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	You can run @coderabbitai generate docstrings to improve docstring coverage.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The title succinctly identifies the affected plugin (out_azure_kusto) and the primary change of lowering a diagnostic log’s severity, which directly reflects the change from info to debug in the code and aligns with the PR’s stated objective to reduce log noise.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 32d9c5a and ad41122.

📒 Files selected for processing (1)

• plugins/out_azure_kusto/azure_kusto_ingest.c (1 hunks)

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

• plugins/out_azure_kusto/azure_kusto_ingest.c

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[Nicusor97]

@patrick-stephens Can you please include this fix in the next version of fluent-bit ?

[patrick-stephens]

Was just awaiting @edsiper to confirm but it looks simple to me although I've just noticed the commit message is wrong - can you update it to match the PR title, i.e. plugin: message?
I can merge then unless I hear otherwise as it seems a trivial fix.