Addon: OpenEBS

Homepage: https://openebs.io/
From MicroK8s version: 1.21+
Supported arch: amd64, arm64 (1.22+)

OpenEBS, is the most widely deployed and easy to use open-source storage solution for Kubernetes. can be enabled with:

microk8s enable openebs

The addon includes the following StorageClass

• openebs-hostpath and
• openebs-jiva-default

The openebs-hostpath is recommended when using on a laptop or a single node cluster. Use openebs-jiva-default StorageClass for multi-node cluster.

Note: Using openebs-jiva-default requires to have 3 replicas.

Using OpenEBS is as easy as creating a PersistentVolumeClaim.

On a single node MicroK8s

When using OpenEBS with a single node MicroK8s, it is recommended to use the openebs-hostpath StorageClass

To create a PersistentVolumeClaim utilizing the openebs-hostpath StorageClass

kind: PersistentVolumeClaim 
apiVersion: v1
metadata:
  name: local-hostpath-pvc
spec:
  storageClassName: openebs-hostpath
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 5G

On multi-node MicroK8s

If you are planning to use OpenEBS with multi nodes, you can use the openebs-jiva-csi-default StorageClass.
For example:

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: jiva-volume-claim
spec:
  storageClassName: openebs-jiva-csi-default
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 5G

Note: Running versions of Kubernetes prior to 1.23 will create the openebs-jiva-default storage class instead of openebs-jiva-csi-default

Disabling

To disable openebs,

microk8s disable openebs
or
microk8s disable openebs:force