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Troubleshooting
Volume can be attached/detached from UI, but Kubernetes Pod/StatefulSet etc cannot use it
Check if volume plugin directory has been set correctly.
By default, Kubernetes use /usr/libexec/kubernetes/kubelet-plugins/volume/exec/ as the directory for volume plugin drivers, as stated in the official document.
But some vendors may choose to change the directory due to various reasons. For example, GKE uses /home/kubernetes/flexvolume, and RKE uses /var/lib/kubelet/volumeplugins.
User can find the correct directory by running ps aux|grep kubelet on the host and check the --volume-plugin-dirparameter. If there is none, the default /usr/libexec/kubernetes/kubelet-plugins/volume/exec/ will be used.