There are several cases a PV (PersistentVolume) appear as Failed in OpenShift or Kubernetes cluster. Once of the reason is wrong ClaimRef by which PV will mark as claimed but actually not in use. Let’s see one example.
# oc get pv |grep lv-1g-110
lv-1g-110 1Gi RWO,ROX,RWX Recycle Failed newproject/postgresql-test-dep 26d
From above snippet we can understand that, the PV lv-1g-110 is claimed by a PVC (PersistentVolumeClaim) named postgresql-test-dep and this is under projectย newproject. So let us check that PVC details.
# oc get pvc -n newproject | grep postgresql-test-dep
# oc get pvc -n newproject | grep lv-1g-110
#
Aah ! now we got confused; there is no such PVC called postgresql-test-dep or anything with lv-1g-110. Means, lv-1g-110 is stuck with some wrong claim. Let us see what is holding inside PV config.
# oc describe pv lv-1g-110 |grep Claim
Claim: newproject/postgresql-test-de
No wonder, we can see the PV got a ClaimRef for a PVC which doesn’t exist at all ! Let’s remove this.
oc edit and remove those ClaimRef lines.
# oc edit pv lv-1g-110
Then remove below lines and save it.
claimRef:
apiVersion: v1
kind: PersistentVolumeClaim
name: postgresql-test-de
namespace: newproject
resourceVersion: "569221692"
uid: 44aa4a1a-e3fd-11e8-83ad-65efe91e200
# oc patch pv/lv-1g-110 --type json -p '[{ "op": "remove", "path": "/spec/claimRef" }]'
Now we check the pv status.
# oc get pv |grep lv-5g-293
lv-1g-110 1Gi RWO,ROX,RWX Recycle Available 8
That’s all; our pv is Available for next claim.
Disclaimer: The views expressed and the content shared are those of the author and do not reflect the views of the author’s employer or techbeatly platform.
Gineesh Madapparambath
Gineesh Madapparambath is the founder of techbeatly and he is the author of the book - ๐๐ป๐๐ถ๐ฏ๐น๐ฒ ๐ณ๐ผ๐ฟ ๐ฅ๐ฒ๐ฎ๐น-๐๐ถ๐ณ๐ฒ ๐๐๐๐ผ๐บ๐ฎ๐๐ถ๐ผ๐ป.
He has worked as a Systems Engineer, Automation Specialist, and content author. His primary focus is on Ansible Automation, Containerisation (OpenShift & Kubernetes), and Infrastructure as Code (Terraform).
(aka Gini Gangadharan - iamgini.com)
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