How to automatically mount zfs file system on Linux/Unix/FreeBSD
I
have created a zfs file system called data/vm_guests on Ubuntu Linux server. After the server reboot, zpools do not automatically mount at /data/vm_guests. It is failing my KVM guest machines. How can I mount my ZFS (zpool) automatically after the reboot?
By default, a ZFS file system is automatically mounted when it is created. Any file system whose mountpoint property is not legacy is managed by ZFS.
List your pools
Type the following command:
# zpool list
Sample outputs:
NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT
data 1.48T 142G 1.35T – 5% 9% 1.00x ONLINE –
nginxwww 131G 40.3G 90.7G – 22% 30% 1.00x ONLINE –
Create zfs file system called data/vm_guests
Type the following command:
# zfs create data/vm_guests
Get mountpoint for data/vm_guests
# zfs get mountpoint data/vm_guests
Sample outputs:
Fig.01: Get the mountpoint for the dataset
Is it mounted?
# zfs get mounted data/vm_guests
Sample outputs:
Fig.02: Get the mountpoint status of the dataset
If not mounted, mount ZFS file system explicitly
You can explicitly set the mountpoint property for zfs file system on Linux/Unix/FreeBSD as shown in the following example:
# zfs set mountpoint=/YOUR-MOUNT-POINT pool/fs
# zfs set mountpoint=/my_vms data/vm_guests
# cd /my_vms
# df /my_vms
# zfs get mountpoint data/vm_guests
# zfs get mounted data/vm_guests
Sample outputs:
Fig.03: Modifying ZFS dataset mountpoints and mount ZFS file system as per needs
Please note that you can pass the -a option to zfs command to mount all ZFS managed file systems. For example:
# zfs mount -a
How do I see a list of all zfs mounted file system?
Tyep the following command:
# zfs mount
# zfs mount | grep my_vms
Unmounting ZFS file systems
# zfs unmount data/vm_guests
SEE ALSO
See zfs(8) command man page for more info:
$ man 8 zfs
How to create RAID 10 – Striped Mirror Vdev ZPool On Ubuntu Linux
