kubectl patch pvc

To increase size in a pvc, decrease size is not suppported:

kubectl patch pvc elasticsearch-master-elasticsearch-master-0 -p '{"spec":{"resources":{"requests":{"storage":"35Gi"}}}}'
persistentvolumeclaim/elasticsearch-master-elasticsearch-master-0 patched

kubectl patch pvc elasticsearch-master-elasticsearch-master-1 -p '{"spec":{"resources":{"requests":{"storage":"35Gi"}}}}'
Error from server (Forbidden): persistentvolumeclaims "elasticsearch-master-elasticsearch-master-1" is forbidden: only dynamically provisioned pvc can be resized and the storageclass that provisions the pvc must support resize

Solution: ensure your StorageClass has AllowVolumeExpansion:  True defined. Can be modified or added without loosing data.

kubectl describe sc standard| grep AllowVolumeExpansion
AllowVolumeExpansion:  True

Related

• Kubernetes PVC resize: kubectl patch pvc
• AllowVolumeExpansion
• gcloud compute disks resize
• AllowVolumeExpansion
• kubectl patch pvc

Activities

• Read https://www.gooksu.com/2022/08/how-to-increase-space-for-your-elasticsearch-instances-in-k8s-on-eck/

See also

• kubectl patch [ cronjobs | svc | pv | pvc | sts | service | secret | sts elastic-operator | node | daemonset | --help ]
• Kubernetes storage, storage classes, PersistentVolume (PV), PVC, CSI, kind: StorageClass, kind: PersistentVolumeClaim, kind: PersistentVolume, kubectl [ get | describe | edit ] pvc, volumeClaimTemplates:, kubectl patch pv, FailedMount, Volume Expansion, Volume Cloning, snapshots, ExtraVolumes, NotTriggerScaleUp, volumePVCDataSource, AllowVolumeExpansion, EKS storage, provisioner, Storage Capacity Tracking, VolumeBinding, VolumeClaimTemplate, storage.k8s.io, CKA Storage, DoKC, EmptyDir, Volume populators, storageclass.kubernetes.io