Volume Expansion for MinIO

Increase the storage capacity of each MinIO node's data volume.

Prerequisites

• A functional Kubernetes cluster (v1.21+ recommended)
• kubectl v1.21+ installed and configured with cluster access
• KubeBlocks installed (installation guide)
• MinIO Add-on enabled:

  helm install minio kubeblocks/minio --version 1.1.0-alpha.0 -n kb-system
  

• A namespace for the cluster (examples use demo):

  kubectl create ns demo
  

Expand Storage

Expand the data volume from 20Gi to 30Gi:

kubectl apply -f - <<EOF
apiVersion: operations.kubeblocks.io/v1alpha1
kind: OpsRequest
metadata:
  name: minio-volume-expand
  namespace: demo
spec:
  clusterName: minio-cluster
  type: VolumeExpansion
  volumeExpansion:
    - componentName: minio
      volumeClaimTemplates:
        - name: data
          storage: "30Gi"
EOF

Monitor progress:

kubectl get opsrequest minio-volume-expand -n demo -w

NAME                  TYPE              CLUSTER         STATUS    PROGRESS   AGE
minio-volume-expand   VolumeExpansion   minio-cluster   Succeed   2/2        71s

Verify the PVC sizes have been updated:

kubectl get pvc -n demo -l app.kubernetes.io/instance=minio-cluster

NAME                         STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS    AGE
data-minio-cluster-minio-0   Bound    pvc-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx   30Gi       RWO            kb-default-sc   10m
data-minio-cluster-minio-1   Bound    pvc-yyyyyyyy-yyyy-yyyy-yyyy-yyyyyyyyyyyy   30Gi       RWO            kb-default-sc   10m

Cleanup

kubectl delete opsrequest minio-volume-expand -n demo --ignore-not-found