PaaS: vzdump read-only

using NFS as remote mount point is a good idea, when the VM Host is going down to read-only state. For example, HDD failure issues.

/mnt
/var/log/pve/tasks
/var/log/vzdump
/var/lib/vz/lock
/var/lib/vz/private//etc
/etc/pve/nodes//qemu-server