Reclaiming Persistent Volumes in Kubernetes

Wed, 28 Sep 2022 09:55:19 +0000

Kubernetes is a widely used open-source container management platform for running stateless, containerized applications at scale. In recent years, Kubernetes has been extended to also support stateful workloads, including databases and key-value stores.{#43de}

There are three important API resources when it comes to managing stateful applications in Kubernetes:{#8e8a}

StatefulSet (STS)
PersistentVolume (PV)
PersistentVolumeClaim (PVC)

STSs schedule stateful pods, which can claim PVs through PVCs and mount them as volumes. Once a PV is claimed by an STS replica, Kubernetes will make sure that the volume stays with the replica, even if the pod gets rescheduled.{#e855}

Frank Rosner on foojay.io - Friends of OpenJDK

Reclaiming Persistent Volumes in Kubernetes