Exercise 8.4 creation PVC with the same name two times increases Used storagequota
While doing Exercise 8.4 for a ResourceQuota, I've created two times a PVC from the same configuration file. The first creation was successful and the second one shows an error as expected:
Error from server (AlreadyExists): error when creating "pvc.yaml": persistentvolumeclaims "pvc-one" already exists
However, I noticed that Resource Quotas in small ns for Used column increased:
ubuntu@k8smaster:~$ kubectl describe ns small
Name: small
Labels: kubernetes.io/metadata.name=small
Annotations:
Status: Active
Resource Quotas
Name: storagequota
Resource Used Hard
-------- --- ---
persistentvolumeclaims 2 10
requests.storage 400Mi 500Mi
pvc and pv looked well. I wonder is it a bug or normal?
Why it does increase even though reject creation the pvc with the same name?
2) I tried to create pvc again(third time) and received the error for limitation of the requests.storage:
Error from server (Forbidden): error when creating "pvc.yaml": persistentvolumeclaims "pvc-one" is forbidden: exceeded quota: storagequota, requested: requests.storage=200Mi, used: requests.storage=400Mi, limited: requests.storage=500Mi
And pvc went to Pending status
ubuntu@k8smaster:~$ kubectl get pvc -n small
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
pvc-one Pending 11m
Comments
-
After some time Resource Quotas returned to the first value without any actions from me. How does it work?
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