ZFS how to mount an existing pool

[runningman84]

Has anyboy tried to use an existing zfs volume using talos?

I get errors like this 10.0.30.83: cannot mount '/tank': failed to create mountpoint: Read-only file system

zfs tends to mount volumes at top level which is readonly in talos

I also tried to mount it using the machinedisk config https://www.talos.dev/v1.6/reference/configuration/#machinedisk
which resulted in talos failing to boot completely.

What is the right way to deal with existing zfs disks? In my case these are usb attached drives where it also does not make sense to access them using a device name like /dev/sdx. It is also possible to mount them via some uuid or something like that?

[smira]

Talos rootfs is read-only, you can't create a directory there. You can mount under /var though, e.g. /var/mnt/tank or something similar.

[runningman84]

okay I used another ubuntu machine to change things like this

zfs set mountpoint=/var/mnt/tank tank

Now it works:

➜  talos talosctl ls /var/mnt/tank
NODE         NAME
10.0.30.83   .
10.0.30.83   alice
10.0.30.83   bob

I think for production use talos would need some kind of zfs api to interact with all the zfs magic.

The normal mount stuff does not apply here....

[runningman84]

or would you advice to use some root pod with zfs utils to do these changes?

[frezbo]

or would you advice to use some root pod with zfs utils to do these changes?

yes, use a privileged container for these operations