jakman85andClaude Opus 4.8
5c64e06354
The k3s VM disks are HDD-backed, so a full Longhorn replica rebuild's sequential I/O can saturate the spindle and starve etcd's WAL fsync, crash-looping etcd and flapping the kube-vip VIP (observed during a rolling node resize). Cap rebuilds to one replica per node at a time so a node bounce or replica replenishment can never storm the disks. Set via HelmRelease defaultSettings.concurrentReplicaRebuildPerNodeLimit (GitOps-managed, permanent). replica-replenishment-wait-interval stays at the Longhorn default of 600s. Reference values.yaml kept in sync. Co-Authored-By: Claude Opus 4.8 <[email protected]>
23 lines
1.6 KiB
YAML
23 lines
1.6 KiB
YAML
# Longhorn Helm values — REFERENCE ONLY (not consumed by kustomization.yaml).
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#
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# The authoritative values are inline in helmrelease.yaml (matching the sibling pattern across
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# platform/ — cilium, cert-manager, velero, etc.). This file documents the knobs that matter so a
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# reviewer can see intent without reading the HelmRelease. Keep it in sync with helmrelease.yaml.
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#
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# persistence:
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# defaultClass: false # we own StorageClasses (storageclasses.yaml)
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#
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# defaultSettings:
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# defaultDataPath: /var/lib/longhorn # dedicated data disk (infra/cloud-init)
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# defaultReplicaCount: ${LONGHORN_DEFAULT_REPLICA_COUNT} # overlay knob (=3 in dev)
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# replicaSoftAntiAffinity: false # HARD anti-affinity: one replica per node
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# replicaZoneSoftAntiAffinity: true # single zone (3 mini-PCs, no failure zones)
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# replicaAutoBalance: best-effort # rebalance toward one-per-node when a node returns
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# concurrentReplicaRebuildPerNodeLimit: 1 # throttle rebuild I/O so it can't starve etcd WAL fsync (HDD-backed)
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# storageReservedPercentageForDefaultDisk: "20" # reserve disk headroom (docs/04 guardrail)
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# storageMinimalAvailablePercentage: "25" # stop scheduling below 25% free
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# storageOverProvisioningPercentage: "100" # dev: no thin over-provisioning (1:1)
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# defaultDataLocality: disabled # keep replicas spread for durability
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# orphanAutoDeletion: true # reclaim orphaned replica space promptly
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# backupTarget: <off-cluster> # TODO(WS-STORAGE, Phase 4): DR target (ADR-0003)
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