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Volume Types

GCS currently provides following types of volumes to cater container workload requirements.

File Volumes
Block Volumes
Thin-Arbiter Volume

File Volumes:

File volumes can be created by specifying the "storageClassName" as "glusterfs-csi" in the configuration file.

Example:

# File: pvc.yaml
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: glusterfs-csi-pv
spec:
  storageClassName: glusterfs-csi
  accessModes:
  - ReadWriteMany
  resources:
    requests:
      storage: 5Gi

Create the volume:
```
# kubectl create -f pvc.yaml
```
Validate the File Volume creation:
```
# kubectl get pvc
```

Block Volumes:

Block volumes can be created by specifying the "storageClassName" as "glustervirtblock-csi" in the configuration file.

Example:

# File: pvc.yaml
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: glusterblock-csi-pv
spec:
  storageClassName: glustervirtblock-csi
  accessModes:
  - ReadWriteMany
  resources:
    requests:
      storage: 5Gi

Create the volume:
```
# kubectl create -f pvc.yaml
```
Validate the File Volume creation:
```
# kubectl get pvc
```

Thin-Arbiter Volumes:

Thin Arbiter volumes are new type of volumes where granularity is considered at brick level to decide the sanity of stored data. It is essentially a type of File Volume.

For Thin-Arbiter volumes storage class needs to be created with required parameters:

Example:

# File: thin-arbiter-storageclass.yaml
---
kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: glusterfs-csi-thin-arbiter
provisioner: org.gluster.glusterfs
parameters:
  arbiterType: "thin"
  arbiterPath: "192.168.10.90:24007/mnt/arbiter-path"

It can be created by specifying the "storageClassName" as "glusterfs-csi-thin-arbiter" in the configuration file.

Example:

# File: thin-arbiter-pvc.yaml
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: glusterfs-csi-thin-pv
spec:
  storageClassName: glusterfs-csi-thin-arbiter
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 5Gi

Create the volume:

# kubectl create -f thin-arbiter-storageclass.yaml

Validate the File Volume creation:
```
# kubectl get pvc
```