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This is a short article with a little k8s persistent storage nugget that I recently uncovered. FWIW, I've only checked this while using the AWS EBS Container Storage Interface (CSI) driver, but the article should apply to any cluster using CSI drivers to mount volumes.
After a PersistentVolume (PV) is created and bound to a Persistent Volume Claim (PVC), a Pod can mount the claim as a volume to access its data. While the Pod is being provisioned, the k8s storage controller creates a VolumeAttachment , which declares its intent to physically attach the volume to the Pod's Node. The storage driver running on the Node will be notified when this VolumeAttachment is created, recognize that it needs to mount a volume to its host, and perform the volume mount, thus making the vo
Lets say that you want to check if a particular volume is actually attached to a Node. For example, maybe you want to ensure that a volume is unmounted before destroying a Node to ensure data integrity of a high-throughput database? So how can you find a PV's corresponding VolumeAttachment to determine if its backing volume is unmounted?
Data on Kubernetes Community - Data on Kubernetes Community