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Volume Creation

GCS volume creation can be quickly done on a Kubernetes cluster by following the simple steps outlined below:

Step - 1: Create GCS cluster:

Install the GCS deploy tool in one of the Kubernetes master node.
```
# sudo pip3 install kubectl-gluster
```
Create a GCS cluster configuration file with below information.
- namespace - Cluster namespace, useful when managing multiple clusters.
- cluster-size - Number of nodes in Gluster cluster. Currently only 3 nodes are supported.
- nodes - Details of nodes where Gluster server pods needs to be deployed.
- address - Address of node as listed in kubectl get nodes(Use kubectl get nodes to get the address)
- devices - Raw devices which are required to auto provision Gluster bricks during Volume create.
Example:
```
# File: mycluster.yaml
---
namespace: gcs
cluster-size: 3
nodes:
    - address: kube1
      devices: ["/dev/vdc"]

    - address: kube2
      devices: ["/dev/vdc"]

    - address: kube3
      devices: ["/dev/vdc"]
```
Create GCS cluster.
```
# kubectl gluster deploy <config-yaml>
```
Verify the GCS cluster.
```
# kubectl get pods -n gcs
```
Note: All the pods should be in running state.

Step - 2: Create PVs from GCS cluster:

Create a configuration file with appropriate information.

Configuration file for file volume.

Example:

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

Create persistent volume
```
# kubectl create -f <config-yaml>
```

Step - 3: Verify the Volume:

List the volume.
```
# kubectl get pvc
```