NUMA trap-node cordoner for TopologyAffinityError livelock (#696)#714
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NUMA trap-node cordoner for TopologyAffinityError livelock (#696)#714georgehong wants to merge 1 commit into
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tofu plan — arc-cbr-production✅ Plan succeeded · commit Plan output |
tofu plan — arc-cbr-production-uw1✅ Plan succeeded · commit Plan output |
tofu plan — meta-prod-aws-ue1✅ Plan succeeded · commit Plan output |
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Stack from ghstack (oldest at bottom):
Adds a CronJob (every 5min) that detects pods rejected by the kubelet
with TopologyAffinityError, cordons the fragmented node to stop the
scheduler from routing more GPU pods to it, and uncordons once all GPU
pods drain. Breaks the livelock where 4 consecutive 4-GPU jobs fail in
~90s on a single NUMA-split p5.48xlarge node.
Reuses the existing zombie-cleanup Docker image (same lightkube dependency).
Phase 0 stopgap described in #696; updating modules for NUMA resource checking follows after.