How to create nodeAffinity on PVC

Kubernetes
#1

Hello, one of the mock exam exercises asks to create a PVC with nodeAffinity.
Unfortunately the k8s docs do not help much with this, other than saying I can user nodeAfffinity.required. But what after that, how is that info inserted into the yaml?
I cannot get the yaml structure to add the nodeAffinity to the PVC.Google is of no use either. Can anyone please give me a hint on this?

Also, please let me know if the hostPath is fine too, as I could not find any concrete example of how that is typed into a yaml.

Thanks a lot in advance.

image
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#2

Hi @Mundofik

Can you please share the link to the lab for this?

kubectl explain can help you with nodeAffinity and your usage of hostPath is fine.

PV-NodeAffinity
PV-NodeAffinity859×591 58.2 KB

Hope this helps

Regards.

#3

Right, I always forget about kubectl explain! Thanks @Santosh_KodeKloud

I managed to make it work with this yaml

apiVersion: v1
kind: PersistentVolume
metadata:
  name: orange-pv-cka07-st
spec:  
  capacity:
    storage: 150Mi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: orange-stc-cka07-str
  hostPath:
    path: /opt/orange-data-cka07-str
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values: ["cluster1-controlplane"]
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