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73 lines
3.0 KiB
Markdown
73 lines
3.0 KiB
Markdown
Title: Unset ZFS legacy mountpoints
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Date: 2022-12-12 23:38
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Summary: Unset ZFS legacy mountpoints on an OVH baremetal server installed with Proxmox and ZFS
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Category: Bloc-notes
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Tags: zfs, proxmox, ovh, admin, shell, cli, storage, backup
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Status: Published
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Translation: true
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Lang: en
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Slug: unset-zfs-legacy-mountpoint-proxmox-ovh-installation
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[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.
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_initial situation on proxmox after installation_:
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```bash
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root@server:~# zfs list
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NAME USED AVAIL REFER MOUNTPOINT
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zp0 3.29G 1.75T 96K none
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zp0/zd0 91.8M 932M 91.8M legacy
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zp0/zd1 3.20G 1.75T 3.20G legacy
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zp0/zd2 104K 1024M 104K legacy
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root@server:~# grep zp0 /etc/fstab
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zp0/zd1 / zfs defaults 0 1
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zp0/zd0 /boot zfs defaults,x-systemd.requires=zfs-import.target 0 0
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zp0/zd2 /var/lib/vz zfs defaults,x-systemd.requires=zfs-import.target 0 0
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```
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_reboot to customer rescue to set mountpoints_…
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```bash
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root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # modprobe zfs
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root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # zpool import -f -N -R /mnt zp0
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root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # zfs set mountpoint=/ zp0/zd1
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root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # zfs set mountpoint=/boot zp0/zd0
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root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # zfs set mountpoint=/var/lib/vz zp0/zd2
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root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # zfs get -r mounted zp0
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NAME PROPERTY VALUE SOURCE
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zp0 mounted no -
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zp0/zd0 mounted yes -
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zp0/zd1 mounted yes -
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zp0/zd2 mounted yes -
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root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # grep zp0 /mnt/etc/fstab
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zp0/zd1 / zfs defaults 0 1
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zp0/zd0 /boot zfs defaults,x-systemd.requires=zfs-import.target 0 0
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zp0/zd2 /var/lib/vz zfs defaults,x-systemd.requires=zfs-import.target 0 0
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root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # sed -i '/^zp0/d' /mnt/etc/fstab
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root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # grep zp0 /mnt/etc/fstab
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root@rescue-customer-eu (nsxxxxx.ip-x-x-x.eu) ~ # zpool export -a
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```
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_reboot to proxmox, et voilà!_
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```bash
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root@server:~# zfs list -r
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NAME USED AVAIL REFER MOUNTPOINT
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zp0 3.29G 1.75T 96K none
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zp0/zd0 91.8M 932M 91.8M /boot
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zp0/zd1 3.20G 1.75T 3.20G /
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zp0/zd2 104K 1024M 104K /var/lib/vz
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```
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_References_:
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- [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)
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- [Oracle Solaris ZFS Administration Guide - Legacy Mount Points](https://docs.oracle.com/cd/E19253-01/819-5461/gbaln/index.html)
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- Thank you _Louis_ 🤝
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[openzfs]: https://openzfs.org
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[OVHcloud baremetal OS]: https://www.ovhcloud.com/en-ie/bare-metal/os/
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[ovh-sd]: https://www.ovhcloud.com/en-ie/bare-metal/
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[pve]: https://proxmox.com/en/
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