Hi Team,
Good Day…
While attending an CKA Mock exam in the " Ultimate Certified Kubernetes Admistrator series" Mock Exam-2 in storage section the below is question and tried to fix but unfortunately getting the wrong storage size from PVC.
Question:
Create a storage class called orange-stc-cka07-str as per the properties given below:
- Provisioner should be kubernetes.io/no-provisioner .
- Volume binding mode should be WaitForFirstConsumer .
Next, create a persistent volume called orange-pv-cka07-str as per the properties given below:
- Capacity should be 150Mi .
- Access mode should be ReadWriteOnce .
- Reclaim policy should be Retain .
- It should use storage class orange-stc-cka07-str .
- Local path should be /opt/orange-data-cka07-str .
- Also add node affinity to create this value on cluster1-controlplane .
Finally, create a persistent volume claim called orange-pvc-cka07-str as per the properties given below:
- Access mode should be ReadWriteOnce .
- It should use storage class orange-stc-cka07-str .
- Storage request should be 128Mi .
- The volume should be orange-pv-cka07-str .
Ans in the Yaml file:
Storage Class:
student-node ~ ➜ cat storage-class.yaml
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
name: orange-stc-cka07-str
provisioner: kubernetes.io/no-provisioner
reclaimPolicy: Retain # default value is Delete
volumeBindingMode: WaitForFirstConsumer
PV:
student-node ~ ➜ cat pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: orange-pv-cka07-str
spec:
capacity:
storage: 150Mi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Retain
storageClassName: orange-stc-cka07-str
local:
path: /opt/orange-data-cka07-str
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values:
- cluster1-controlplane
PVC:
student-node ~ ➜ cat pvc.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: orange-pvc-cka07-str
spec:
accessModes:
- ReadWriteOnce
volumeMode: Filesystem
resources:
requests:
storage: 128Mi
storageClassName: orange-stc-cka07-str
volumeName: orange-pv-cka07-str
Output from the Terminal:
student-node ~ ➜ k get storageclasses.storage.k8s.io orange-stc-cka07-str
NAME PROVISIONER RECLAIMPOLICY VOLUMEBINDINGMODE ALLOWVOLUMEEXPANSION AGE
orange-stc-cka07-str kubernetes.io/no-provisioner Retain WaitForFirstConsumer false 13m
student-node ~ ➜ k get pv
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS VOLUMEATTRIBUTESCLASS REASON AGE
orange-pv-cka07-str 150Mi RWO Retain Bound default/orange-pvc-cka07-str orange-stc-cka07-str 9m6s
student-node ~ ➜ k get pvc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS VOLUMEATTRIBUTESCLASS AGE
orange-pvc-cka07-str Bound orange-pv-cka07-str 150Mi RWO orange-stc-cka07-str 6m20s