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fix(longhorn): reduce guaranteed-instance-manager-cpu 12% → 6% #1665

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fix(longhorn): reduce guaranteed-instance-manager-cpu 12% → 6% #1665

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9 changes: 9 additions & 0 deletions k8s/providers/hetzner/infrastructure/controllers/longhorn/helm-release.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,15 @@ spec:
# Restrict Longhorn system-managed pods (instance-managers, etc.)
# to storage nodes. Prevents ~100Mi overhead per non-storage node.
systemManagedComponentsNodeSelector: "node.longhorn.io/create-default-disk:true"
# Reduce the CPU guaranteed per instance-manager from Longhorn's 12%
# default. Live data (2026-05-29): 6 instance-managers each reserved
# ~474m (12% of a cx33) while using 8-30m — ~2.7 cores locked, and these
# pods are NOT VPA-managed. 6% (~240m on cx33) keeps 8-16x headroom over
# observed usage, frees ~1.4 cores, and still leaves margin for the CPU
# spikes during Longhorn replica rebuilds.
guaranteedInstanceManagerCPU:
v1: "6"
v2: "6"

persistence:
# Longhorn is the default StorageClass (replaces hcloud for new PVCs).
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