title	description
GKE Storage with GCP File Store - Custom StorageClass	Use GCP File Store for GKE Workloads with Custom StorageClass

Step-00: Pre-requisites

1. Verify if GKE Cluster is created
2. Verify if kubeconfig for kubectl is configured in your local terminal

# Configure kubeconfig for kubectl
gcloud container clusters get-credentials <CLUSTER-NAME> --region <REGION> --project <PROJECT>

# Replace Values CLUSTER-NAME, ZONE, PROJECT
gcloud container clusters get-credentials standard-cluster-private-1 --region us-central1 --project kdaida123

Step-01: Introduction

• GKE Storage with GCP File Store - Custom StorageClass

Step-02: Enable Filestore CSI driver (If not enabled)

• Go to Kubernetes Engine -> standard-cluster-private -> Details -> Features -> Filestore CSI driver
• Click on Checkbox Enable Filestore CSI Driver
• Click on SAVE CHANGES

Step-03: Verify if Filestore CSI Driver enabled

# Verify Filestore CSI Daemonset in kube-system namespace
kubectl -n kube-system get ds | grep file
Observation: 
1. You should find the Daemonset with name "filestore-node"

# Verify Filestore CSI Daemonset pods in kube-system namespace
kubectl -n kube-system get pods | grep file
Observation: 
1. You should find the pods with name "filestore-node-*"

Step-04: Existing Storage Class

• After you enable the Filestore CSI driver, GKE automatically installs the following StorageClasses for provisioning Filestore instances:
• standard-rwx: using the Basic HDD Filestore service tier
• premium-rwx: using the Basic SSD Filestore service tier

# Default Storage Class created as part of FileStore CSI Enablement
kubectl get sc
Observation: Below two storage class will be created by default
standard-rwx
premium-rwx 

Step-05: 00-filestore-storage-class.yaml

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: filestore-storage-class
provisioner: filestore.csi.storage.gke.io # File Store CSI Driver
volumeBindingMode: WaitForFirstConsumer
allowVolumeExpansion: true
parameters:
  tier: standard # Allowed values standard, premium, or enterprise
  network: default # The network parameter can be used when provisioning Filestore instances on non-default VPCs. Non-default VPCs require special firewall rules to be set up.

Step-06: Other YAML files are same as previous section

• Other YAML files are same as previous section
• 01-filestore-pvc.yaml
• 02-write-to-filestore-pod.yaml
• 03-myapp1-deployment.yaml
• 04-loadBalancer-service.yaml

Step-07: Deploy kube-manifests

# Deploy kube-manifests
kubectl apply -f kube-manifests/

# List Storage Class
kubectl get sc

# List PVC
kubectl get pvc

# List PV
kubectl get pv

# List Pods
kubectl get pods

Step-08: Verify GCP Cloud FileStore Instance

• Go to FileStore -> Instances
• Click on Instance ID: pvc-27cd5c27-0ed0-48d1-bc5f-925adfb8495f
• Note: Instance ID dynamically generated, it can be different in your case starting with pvc-*

Step-09: Connect to filestore write app Kubernetes pods and Verify

# FileStore write app - Connect to Kubernetes Pod
kubectl exec --stdin --tty <POD-NAME> -- /bin/sh
kubectl exec --stdin --tty filestore-writer-app  -- /bin/sh
cd /data
ls
tail -f myapp1.txt
exit

Step-10: Connect to myapp1 Kubernetes pods and Verify

# List Pods
kubectl get pods 

# myapp1 POD1 - Connect to Kubernetes Pod
kubectl exec --stdin --tty <POD-NAME> -- /bin/sh
kubectl exec --stdin --tty myapp1-deployment-5d469f6478-2kp97 -- /bin/sh
cd /usr/share/nginx/html/filestore
ls
tail -f myapp1.txt
exit

# myapp1 POD2 - Connect to Kubernetes Pod
kubectl exec --stdin --tty <POD-NAME> -- /bin/sh
kubectl exec --stdin --tty myapp1-deployment-5d469f6478-2kp97  -- /bin/sh
cd /usr/share/nginx/html/filestore
ls
tail -f myapp1.txt
exit

Step-11: Access Application

# List Services
kubectl get svc

# Access Application
http://<EXTERNAL-IP-OF-GET-SERVICE-OUTPUT>/filestore/myapp1.txt
http://35.232.145.61/filestore/myapp1.txt
curl http://35.232.145.61/filestore/myapp1.txt

Step-12: Clean-Up

# Delete Kubernetes Objects
kubectl delete -f kube-manifests/

# Verify if FileStore Instance is deleted
Go to -> FileStore -> Instances