Writing Hub: StatefulSet Storage HA via Mutating Webhook#8
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Vinh1507 wants to merge 2 commits intocloudnativevn:mainfrom
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Writing Hub: StatefulSet Storage HA via Mutating Webhook#8Vinh1507 wants to merge 2 commits intocloudnativevn:mainfrom
Vinh1507 wants to merge 2 commits intocloudnativevn:mainfrom
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…to Each Pod with a Mutating Webhook
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Event
Writing Contest 2026
Topic: Kubernetes Operations & Maintenance
Summary
StatefulSet only allows one
storageClassNameacross all pods. In environments where each StorageClass maps to a distinct storage pool, this means all replicas share the same failure domain — defeating the purpose of HA replication.This article walks through the problem and a practical fix: a Mutating Admission Webhook that intercepts PVC creation and assigns a different StorageClass to each pod based on its ordinal. Opt-in via a label on
volumeClaimTemplates, no changes to the StatefulSet spec required.Coverage