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pipeline: filters: kubernetes: document namespace and pod name validation - #2779
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The title clearly describes the main change: documenting namespace and pod name validation for the Kubernetes filter. |
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Inline comments:
Review comments at @pipeline/filters/kubernetes.md:
- Around line 367-368: Update the custom regular expression guidance near the
validation description to say it must capture namespace_name and pod_name, and
may also capture container_name, container_hash, and docker_id for metadata.
Remove wording that implies only namespace_name and pod_name are supported
captures.
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Actionable comments posted: 1
- 🪄 Fix comments: Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @pipeline/filters/kubernetes.md:
- Around line 367-368: Update the invalid-capture behavior description to
distinguish input modes: non-journal records pass through without Kubernetes
metadata, while records with use_journal enabled are skipped. Keep the existing
validation and capture guidance unchanged.
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…validation - Add a v5.1.4 note to the custom regular expressions section - Document the DNS label and subdomain rules for captured namespace and pod names - Document the warning and pass-through behavior for invalid names - State that custom Regex_Parser must capture namespace_name and pod_name - Note optional container_name, container_hash, and docker_id captures - Records without use_journal pass through without Kubernetes metadata - Records with use_journal enabled are dropped Signed-off-by: Eric D. Schabell <eric@schabell.org>
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Documents the namespace and pod name validation added to the Kubernetes filter in v5.1.4 (fluent/fluent-bit commit 06237cc3c, "filter_kubernetes: validate captured namespace and pod names").
Changes
Custom regular expressionssection ofpipeline/filters/kubernetes.md-only, plus.for pod namesinvalid Kubernetes namespace or pod nameand the record passes through without Kubernetes metadataSource references
plugins/filter_kubernetes/kube_meta.c:kube_name_valid()and its call inparse_regex_tag_data()plugins/filter_kubernetes/kubernetes.c: a failed metadata lookup returnsFLB_FILTER_NOTOUCHNotes