kubernetes tutorial | Kubernetes Volumes | Demo: create PV, PVC & Mount it a Pod using Local Storage

VSPARKZ منتشر شده در تاریخ 1402/08/14

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CERTIFIED KUBERNETES ADMINISTRATOR
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Kubernetes Tutorial | DEMO Create PV PVC and Mount it in a Pod
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In this video, you are going to see a DEMO on how to create PV, PVC and mount the same into the Pod.

For suggestions/feedback/doubts contact
email: [email protected]

Happy Learning !!!

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USEFUL LINKS
----------------------------

Overview of Volumes

https://kubernetes.io/docs/concepts/s...

Persistent Volumes

https://kubernetes.io/docs/concepts/s...

* Kubectl Command Reference*

https://kubernetes.io/docs/reference/...

==========================================================================================
#cka #kubernetes #k8s #container

DEMO STEPS
****************

Step 1: Access & Inspect the Kubernetes Cluster

$ kubectl cluster-info

$ kubectl get nodes

$ kubectl get pods -n kube-system

Step 2: Create Persistent Volumes using Local Storage (Static Provisioning)

In Worker 1

$ mkdir -p /pv/pv-1

In Worker 2

$ mkdir -p /pv/pv-2

Create pv-1 & pv-2

Sample PV manifest
===============================================
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv-1
spec:
accessModes:
- ReadWriteMany
capacity:
storage: 1Gi
persistentVolumeReclaimPolicy: Retain
volumeMode: Filesystem
local:
path: /pv/pv-1
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values:
- worker01.kubernetes.com
================================================

Step 3: Create Persistent Volumes Claims

Create pvc-1 & pvc-2

Sample PVC Manifest
======================================

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: pvc-1
spec:
accessModes:
- ReadWriteMany
volumeMode: Filesystem
resources:
requests:
storage: 1Gi
=======================================

Step 4: Create Pods and Mount the Persistent Volume Claims

Create Pod-1 and Pod-2 and mount the PVC's respectively

Sample POD Manifest
===============================================
apiVersion: v1
kind: Pod
metadata:
labels:
app: apache
name: pod-1
spec:
volumes:
- name: myvolume-1
persistentVolumeClaim:
claimName: pvc-1
containers:
- image: httpd
name: apache
volumeMounts:
- name: myvolume-1
mountPath: /usr/local/apache2/htdocs/
==================================================

Step 5: Create some data within the Pod and check the data persistence

Create some data under the mountpath folder
Since this is a webserver pod, it is suggested to create index.html for better understanding

$ kubectl exec -it pod-1 -- sh

Step 6: Delete Pod-2 and Create Pod-3 with Pod 2’s PVC claim

$ kubectl delete pod pod-2

Now create pod-3 with pod-2's pvc claim and validate the data in pod-3

THE END

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