KubePersistentvolumeError
Resolve PV-related errors in a Kubernetes cluster to ensure proper data storage and access for applications.
Overview
This outlines the steps to diagnose and resolve errors related to Kubernetes Persistent Volumes (PVs) and Persistent Volume Claims (PVCs). Persistent Volumes are used to store data in a Kubernetes cluster and can encounter errors related to provisioning, mounting, or accessing the storage.
Initial Response
Alert received indicating persistent volume error.
Acknowledge the alert and assign yourself as the incident owner.
Notify the team about the ongoing incident using the primary communication channel.
Update the incident status on the incident tracking system.
Check RunBook Match
When running a kubectl get pv command, you will see a line like this in the output for your pod:
kubectl get pv
kubectl get pvc -n <namespace>Detailed Steps
1) Identify the Error
To determine the root cause here, first, gather relevant information that you may need to refer back to later.
Run the following commands to inspect PVs and PVCs:
kubectl get pv
kubectl get pvc -n <namespace>Ensure the status of both PVs and PVCs is "Bound" or appropriate for the situation.
2) Inspect Storage Classes
Check if the appropriate StorageClass is available for the PVC. Run
kubectl get storageclassEnsure the StorageClass matches the PVC's storageClassName.
3) Examine PV and PVC Configuration
Check if the PV and PVC configurations match, especially the storage size and access modes.
4) Check Provisioner Status
For dynamic provisioning, verify that the storage provisioner is working and properly configured and inspect the provisioner's logs for any errors.
5) Verify Volume Mount
Check if the PV is mounted to the correct path inside the Pod by examining the Pod's configuration.
3) Check Node and Disk Status
Ensure the nodes where the PVs are provisioned have adequate resources and disk space available
Escalation:
If the issue persists or is severe, escalate to a senior SRE engineer for additional support and guidance.
Further Information
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