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free_zed.gitlab.io/content/unset-zfs-legacy-mountpoint-proxmox-ovh-installation-en.md

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✨ Add ZFS legacy mountpoints notes
2022-12-13 00:11:45 +00:00
Title: Unset ZFS legacy mountpoints
Date: 2022-12-12 23:38
Summary: Unset ZFS legacy mountpoints on an OVH baremetal server installed with Proxmox and ZFS
Category: Bloc-notes
Tags: zfs, proxmox, ovh, admin, shell, cli, storage, backup
Status: Published
Translation: true
Lang: en
Slug: unset-zfs-legacy-mountpoint-proxmox-ovh-installation
[Proxmox][pve] with a [ZFS][openzfs] root file system on an [OVHcloud baremetal server][ovh-sd] use _Legacy mountpoints_ (managed via `/etc/fstab`). This is a valid setup but avoid using properties inheritance between datasets. Let’s get gives back to ZFS the mountpoint management with a few configuration.
_initial situation on proxmox after installation_:
```bash
root@server:~# zfs list
NAME USED AVAIL REFER MOUNTPOINT
zp0 3.29G 1.75T 96K none
zp0/zd0 91.8M 932M 91.8M legacy
zp0/zd1 3.20G 1.75T 3.20G legacy
zp0/zd2 104K 1024M 104K legacy
🩹 Update commands after retry
2022-12-28 00:17:37 +00:00
root@server:~# grep zp0 /etc/fstab
✨ Add ZFS legacy mountpoints notes
2022-12-13 00:11:45 +00:00
zp0/zd1 / zfs defaults 0 1
zp0/zd0 /boot zfs defaults,x-systemd.requires=zfs-import.target 0 0
zp0/zd2 /var/lib/vz zfs defaults,x-systemd.requires=zfs-import.target 0 0
```
_reboot to customer rescue to set mountpoints_…
```bash
root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # modprobe zfs
🩹 Update commands after retry
2022-12-28 00:17:37 +00:00
root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # zpool import -f -N -R /mnt zp0
✨ Add ZFS legacy mountpoints notes
2022-12-13 00:11:45 +00:00
root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # zfs set mountpoint=/ zp0/zd1
root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # zfs set mountpoint=/boot zp0/zd0
root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # zfs set mountpoint=/var/lib/vz zp0/zd2
🩹 Update commands after retry
2022-12-28 00:17:37 +00:00
root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # zfs get -r mounted zp0
NAME PROPERTY VALUE SOURCE
zp0 mounted no -
zp0/zd0 mounted yes -
zp0/zd1 mounted yes -
zp0/zd2 mounted yes -
✨ Add ZFS legacy mountpoints notes
2022-12-13 00:11:45 +00:00
root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # grep zp0 /mnt/etc/fstab
zp0/zd1 / zfs defaults 0 1
zp0/zd0 /boot zfs defaults,x-systemd.requires=zfs-import.target 0 0
zp0/zd2 /var/lib/vz zfs defaults,x-systemd.requires=zfs-import.target 0 0
root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # sed -i '/^zp0/d' /mnt/etc/fstab
root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # grep zp0 /mnt/etc/fstab
root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # zpool export -a
```
_reboot to proxmox, et voilà!_
```bash
🩹 Update commands after retry
2022-12-28 00:17:37 +00:00
root@server:~# zfs list -r
✨ Add ZFS legacy mountpoints notes
2022-12-13 00:11:45 +00:00
NAME USED AVAIL REFER MOUNTPOINT
zp0 3.29G 1.75T 96K none
zp0/zd0 91.8M 932M 91.8M /boot
zp0/zd1 3.20G 1.75T 3.20G /
zp0/zd2 104K 1024M 104K /var/lib/vz
```
_References_:
- [FreeBSD Manual Pages - `ZFS(8)`](https://www.freebsd.org/cgi/man.cgi?query=zfs&apropos=0&sektion=8&manpath=FreeBSD+14.0-CURRENT&arch=default&format=html)
- [Oracle Solaris ZFS Administration Guide - Legacy Mount Points](https://docs.oracle.com/cd/E19253-01/819-5461/gbaln/index.html)
- Thank you _Louis_ 🤝
[openzfs]: https://openzfs.org
[OVHcloud baremetal OS]: https://www.ovhcloud.com/en-ie/bare-metal/os/
[ovh-sd]: https://www.ovhcloud.com/en-ie/bare-metal/
[pve]: https://proxmox.com/en/
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