out_file: support timestamp placeholder - #12245
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📝 WalkthroughWalkthroughThe file output plugin now supports UTC ChangesTimestamp-based file destinations
Estimated code review effort: 3 (Moderate) | ~20 minutes Sequence Diagram(s)sequenceDiagram
participant EventDecoder
participant OutFilePlugin
participant OutputFile
EventDecoder->>OutFilePlugin: decoded record with timestamp
OutFilePlugin->>OutFilePlugin: format UTC strftime placeholders
OutFilePlugin->>OutputFile: write to resolved path and filename
Possibly related PRs
Suggested reviewers: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Actionable comments posted: 1
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@plugins/out_file/file.c`:
- Around line 421-428: Update the timestamp expansion logic in
plugins/out_file/file.c at lines 421-428 and 431-463 so strftime processes only
configured path/file placeholders, preserving record-accessor values literally,
including values containing %Y. Add or update the mixed accessor/timestamp
coverage in tests/runtime/out_file.c lines 618-662 to verify only configured
placeholders expand and accessor output remains unchanged.
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plugins/out_file/file.ctests/runtime/CMakeLists.txttests/runtime/flb_tests_runtime.h.intests/runtime/out_file.ctests/runtime/out_file_rotation.c
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Signed-off-by: Hiroshi Hatake <hiroshi@chronosphere.io>
Signed-off-by: Hiroshi Hatake <hiroshi@chronosphere.io> wwip
Signed-off-by: Hiroshi Hatake <hiroshi@chronosphere.io>
Signed-off-by: Hiroshi Hatake <hiroshi@chronosphere.io>
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Actionable comments posted: 1
🧹 Nitpick comments (1)
tests/runtime/out_file.c (1)
643-645: 🎯 Functional Correctness | 🔵 Trivial | 🏗️ Heavy liftMake the UTC assertions timezone-sensitive.
A local-time implementation can pass these tests when the runner timezone is UTC. Run the scenarios with a controlled non-UTC local timezone and use a timestamp that crosses a local-date boundary. Restore the process timezone after each test.
tests/runtime/out_file.c#L643-L645: verify the date-expanded filename uses the UTC event date.tests/runtime/out_file.c#L673-L719: make the standalone timestamp test distinguish UTC from local time.tests/runtime/out_file.c#L721-L778: retain the percent-value coverage while verifying the UTC year and date components.As per coding guidelines, runtime tests must cover plugin-level semantics.
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@tests/runtime/out_file.c` around lines 643 - 645, Make the UTC assertions in tests/runtime/out_file.c:643-645, tests/runtime/out_file.c:673-719, and tests/runtime/out_file.c:721-778 timezone-sensitive by setting a controlled non-UTC process timezone for each scenario, using timestamps that cross a local-date boundary, and restoring the original timezone afterward; verify UTC date expansion, distinguish standalone UTC timestamps from local time, and preserve percent-value coverage while asserting UTC year and date components.Source: Coding guidelines
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@tests/runtime/out_file.c`:
- Around line 569-603: Update flb_test_file_literal_percent to construct its
output and fallback filenames under TEST_LOGPATH instead of the working
directory, including configuring both paths accordingly. Replace direct remove
calls and existence cleanup with flb_test_rmdir() for the test-specific
directory, while preserving the assertions that the output is created and the
fallback is absent.
---
Nitpick comments:
In `@tests/runtime/out_file.c`:
- Around line 643-645: Make the UTC assertions in
tests/runtime/out_file.c:643-645, tests/runtime/out_file.c:673-719, and
tests/runtime/out_file.c:721-778 timezone-sensitive by setting a controlled
non-UTC process timezone for each scenario, using timestamps that cross a
local-date boundary, and restoring the original timezone afterward; verify UTC
date expansion, distinguish standalone UTC timestamps from local time, and
preserve percent-value coverage while asserting UTC year and date components.
🪄 Autofix
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
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Review profile: CHILL
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Run ID: fe95adb7-b3b6-4fea-bedc-b01656d0ce3f
📒 Files selected for processing (2)
plugins/out_file/file.ctests/runtime/out_file.c
🚧 Files skipped from review as they are similar to previous changes (1)
- plugins/out_file/file.c
Signed-off-by: Hiroshi Hatake <hiroshi@chronosphere.io>
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This should be a parity feature of Fluentd's placeholder support on Fluent Bit's out_file plugin.
Implemented and verified on Windows.
strftimeplaceholders in file.c.%Y%m%dcoverage, includingpath/$TAG/$proxy_name/file.%Y%m%d, in out_file.c.The reported failures occurred because duplicate instances of the same test binary ran concurrently and shared their fixed fixture directories. Isolated sequential execution passes consistently:
Targeted MSVC rebuild passed,
git diff --checkpassed, and the repository commit-prefix checker passed. The branch is clean at6174e0eee.No focused
tests/integrationscenario exists forout_file. Platform memory checking was not run because this is Windows; Valgrind and macOS Leaks are unavailable.Closes #12233.
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[N/A]in the box, if an item is not applicable to your change.Testing
Before we can approve your change; please submit the following in a comment:
If this is a change to packaging of containers or native binaries then please confirm it works for all targets.
ok-package-testlabel to test for all targets (requires maintainer to do).Documentation
Backporting
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
New Features
strftimeplaceholders for dynamic output paths and filenames when enabled.Bug Fixes