❄️Day 36 - Managing Persistent Volumes in Your Deployment 💥

In Kubernetes, a Persistent Volume (PV) is a piece of storage in the cluster that has been provisioned by an administrator. A Persistent Volume Claim (PVC) is a request for storage by a user. The PVC references the PV, and the PV is bound to a specific node.

✒️Task 1:

Create a Persistent Volume using a file on your node.
Create a Persistent Volume Claim that references the Persistent volume.

apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-todo-app
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  hostPath:
    path: "/tmp/data"

Apply the updates using command kubectl apply -f pv.yaml

Create a Persistent Volume Claim that references the Persistent volume.

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pvc-todo-app
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 500Mi

Apply the updates using command kubectl apply -f pvc.yaml

Update your deployment.yml file to include the Persistent Volume Claim. After Applying pv.yml pvc.yml your deployment file

apiVersion: apps/v1
kind: Deployment
metadata:
  name: node-todo-app
  namespace: node-app-deployment
  labels:
    app: node-app
spec:
  replicas: 3
  selector:
    matchLabels:
      app: node-app
  template:
    metadata:
      labels:
        app: node-app
    spec:
      containers:
        - name : node-app
          image: sarikak/node-app-batch-6
          ports:
            - containerPort: 8000
          volumeMounts:
            - name: todo-app-data
              mountPath: /app
      volumes:
        - name: todo-app-data
          persistentVolumeClaim:
            claimName: pvc-todo-app

Apply the updated deployment using the command: kubectl apply -f deployment.yml

Verify that the Persistent Volume has been added to your Deployment by checking the status of the Pods and Persistent Volumes in your cluster. Use this commands kubectl get pods ,kubectl get pv

✒️Task 2:

Connect to a Pod in your Deployment using command : `kubectl exec -it -- /bin/bash

Verify that you can access the data stored in the Persistent Volume from within the Pod

📚Happy Learning :)