Reducing disk i/o of geneva logging #4561
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ehvs
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ehvs
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mociarain
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Jan 26, 2026
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This is great work. Thanks for seeing this all the way to the end
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Which issue this PR addresses:
Epic: https://issues.redhat.com/browse/ARO-23137
Card: https://issues.redhat.com/browse/ARO-23139
Control plane nodes can experience disk pressure from logging/monitoring components becoming a noisy neighbor to Etcd.
This change set tunes Geneva logging (fluent-bit + mdsd) to minimize disk usage and reduce OOM risk, while keeping container log collection behavior unchanged.
What this PR does / why we need it:
This PR tunes Geneva logging (fluent-bit + mdsd) to reduce control plane disk usage and better match real resource consumption. It disables inotify watching only for kube-apiserver audit log tailing (container logs remain inotify-based).
Test plan for issue:
Is there any documentation that needs to be updated for this PR?
No
How do you know this will function as expected in production?
Test plan with production cluster documented TBD (link)