Creating a Storage Class in Google Cloud

Introduction

For Google Cloud, Bunnyshell supports the following types of volumes:

• ReadWriteOnce (Disk) volumes

• ReadWriteMany (Network) volumes

Prerequisites

Kubectl requirements

• Make sure gcloud is installed - https://cloud.google.com/sdk/docs/install + https://cloud.google.com/sdk/docs/initializing

• Make sure gcloud is authorised - https://cloud.google.com/sdk/docs/authorizing

• Make sure you're connected to the cluster and that the cluster is the current context. Install kubectl and configure cluster access

Permissions

Before creating your Storage Class in Google Cloud, make sure you have the following predefined roles:

• Kubernetes Engine Viewer

• Kubernetes Engine Admin

• Project IAM Admin

The command below helps you list all available GC storage classes present in the cluster, with information that can be used to create a new CSI:

kubectl get sc

Upon using the previous command, you should receive the following Output:

NAME                     PROVISIONER                    RECLAIMPOLICY   VOLUMEBINDINGMODE      ALLOWVOLUMEEXPANSION   AGE
premium-rwo              pd.csi.storage.gke.io          Delete          WaitForFirstConsumer   true                   2d20h
premium-rwx              filestore.csi.storage.gke.io   Delete          WaitForFirstConsumer   true                   2d20h
standard                 kubernetes.io/gce-pd           Delete          Immediate              true                   2d20h
standard-rwo (default)   pd.csi.storage.gke.io          Delete          WaitForFirstConsumer   true                   2d20h
standard-rwx             filestore.csi.storage.gke.io   Delete          WaitForFirstConsumer   true                   2d20h

Steps to create Disk and Network Volumes

DISK VOLUMES

The steps detailed below will help you create a Disk (ReadWriteOnce) Volume:

Setting the proper context

Starting here, you will work in the terminal. Make sure you're connected to the cluster and that the cluster is the current context. Use the command kubectl config --help to obtain the necessary information.

1. To create a storage class, first enter the content below in the csi.yaml file:

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: bns-disk-sc
provisioner: pd.csi.storage.gke.io
volumeBindingMode: WaitForFirstConsumer
allowVolumeExpansion: true
parameters:
  type: pd-balanced

Disk and machine types supported for Zonal and Regional persistent disks

Zonal Persistent Disks

The table below shows disk types and machine types supported for Zonal persistent disks.

Disk type	Supported machine types
pd-standard	All machine types
pd-balanced	All machine types
pd-ssd	All machine types
pd-extreme	n2-standard with 64 or more vCPUs, n2-highmem-64, n2-highmem-80, m1-megamem-96, m2-ultramem-208, m2-ultramem-416

Regional Persistent Disks

2. Apply the csi.yaml file

kubectl apply -f csi.yaml

// OUTPUT
storageclass.storage.k8s.io/bns-disk-sc created

3. Verify the presence of the bns-disk-sc storage class using the command below:

kubectl get sc

// OUTPUT
NAME                 PROVISIONER                                     RECLAIMPOLICY   VOLUMEBINDINGMODE      ALLOWVOLUMEEXPANSION   AGE
bns-disk-sc          pd.csi.storage.gke.io                           Delete          WaitForFirstConsumer   true                   25m

Read more about this on the Google Cloud documentation website.

NETWORK VOLUMES