build: bump to v5.1 (dev)

[edsiper]

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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

  • Bumped the project version to 5.1.0 across build, packaging, Docker, and Snap artifacts.
  • Updated release references so generated images and packages now reflect the new version.

• Documentation

  • Refreshed maintenance and roadmap guidance to match the current v5.1 development branch and v5.0 stable series.
  • Clarified supported maintenance targets and contribution/backport instructions.

[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: eb68f9e3-fd1e-42ec-8115-653216e117a8

📥 Commits

Reviewing files that changed from the base of the PR and between 46e15a1 and 17e1b25.

📒 Files selected for processing (6)

• CMakeLists.txt
• MAINTENANCE.md
• README.md
• dockerfiles/Dockerfile
• fluent-bit-5.1.0.bb
• snap/snapcraft.yaml

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📝 Walkthrough

Walkthrough

This PR bumps the Fluent Bit version from 5.0.9 to 5.1.0 across CMakeLists.txt, the Dockerfile, the Bitbake recipe, and snapcraft.yaml. It also updates MAINTENANCE.md and README.md to reflect master tracking v5.1 (development) and v5.0 as the current stable series.

Changes

Version Bump to 5.1.0

Layer / File(s)	Summary
Build and packaging version bump CMakeLists.txt, dockerfiles/Dockerfile, fluent-bit-5.1.0.bb, snap/snapcraft.yaml	Version identifiers (FLB_VERSION_MINOR/PATCH, RELEASE_VERSION, PV, snap version) are updated from 5.0.9 to 5.1.0.
Maintenance and roadmap documentation MAINTENANCE.md, README.md	Branch/version tables, maintenance policy text, contribution target guidance, and roadmap text are updated to reflect master as v5.1 development and v5.0 as the stable series.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Possibly related PRs

• fluent/fluent-bit#11339: Both PRs update MAINTENANCE.md branch/version lifecycle and backport/target guidance.
• fluent/fluent-bit#11349: Both PRs perform coordinated version bumps across the same version-definition and packaging files.
• fluent/fluent-bit#12018: Both PRs bump the same version variables across CMakeLists.txt, Dockerfile, Bitbake recipe, and snapcraft.yaml.

Suggested reviewers: niedbalski, patrick-stephens, celalettin1286

🚥 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 summarizes the main change: bumping the project to the v5.1 development release.
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
• Commit unit tests in branch development/5.1.0

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[chatgpt-codex-connector]

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Reviewed commit: 17e1b2592a

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[chatgpt-codex-connector]

Keep stable BitBake recipe on the stable series

This recipe is the release recipe (it says it packages the latest stable release, while fluent-bit_git.bb covers active master builds), but this commit also documents v5.1 as the development line and v5.0 as the current stable series in MAINTENANCE.md. With PV set to 5.1.0, Yocto users consuming the stable recipe will fetch/build the development series, or fail before a v5.1.0 release tag exists; keep this recipe on the v5.0.x stable release until v5.1 becomes stable.

Useful? React with 👍 / 👎.

[chatgpt-codex-connector]

Drop EOL 4.1 from backport targets

As of July 7, 2026, v4.1 is past its February 28, 2026 EOM and SECURITY.md marks 4.1 and earlier as EOL with no further fixes, but this updated contribution guidance still tells contributors to target v4.1. That sends fixes toward a branch the security policy says is closed; remove v4.1 from the maintained target list or explicitly mark it EOL in this section.

Useful? React with 👍 / 👎.