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16-17 June
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⚡ Lightning Talk: Providing Sufficient PVCs for Your StatefulSets: Creating New Volumes Larger Than the PVCTemplate - Kaoru Esashika, Cybozu, Inc.
Monday June 16, 2025 14:45 - 14:50 JST
Level 1 | Orion
Have you ever used automatic PVC resizing tools in Kubernetes? Have you ever encountered a situation where newly created PVCs remained at the small, template-defined size, causing capacity shortages during restores or clones?

To address this challenge, this session introduces a new approach in pvc-autoresizer, one of the tools for automatically resizing PVCs. By aligning newly created PVCs with the largest capacity in the same group, it ensures that PVCs have sufficient space right from creation time. Using annotations and a Mutating Webhook, we avoid capacity shortages during restores by provisioning enough volume capacity immediately after a PVC is generated. We will also explain why we chose a Webhook-based method over a Controller-based one, along with the design trade-offs involved.

Anyone seeking to enhance reliability for stateful workloads should not miss this session. Learn how a new PVC management strategy can deliver more stable Kubernetes storage.
Speakers
avatar for Kaoru Esashika

Kaoru Esashika

Software Engineer, Cybozu, Inc.
He works at Cybozu, Inc. For the past three years, he has focused on the operation and development of the storage area for a new infrastructure using Kubernetes. His work includes developing and operating distributed storage with Rook and Ceph, and own CSI plugin, TopoLVM.
Monday June 16, 2025 14:45 - 14:50 JST
Level 1 | Orion
  ⚡ Lightning Talks, Data Processing + Storage

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