Volume storage Nomad

Hi all.
Please tell me how to do the following task.
There is a cluster, you need to install sci to it to make it easier to deploy. Now everything is implemented in the form of an nfs server. The network folders of which are mounted to nomad clients. The servers are physical, not in the cloud. This raises the question of how best to implement disk monitoring.
And one more question. Is it possible to somehow fix the size of the volumes that I monitor in the job