Re: Import and Export of Zfs pools

[Dan Ritter <dsr@randomstring.org>]

James Allsopp wrote: 
> Hi,
> I've got a zfs pool that works fine in normal use on my debian system and
> remains after a reboot.
> When I reboot into recovery mode, I have to reimport the pool manually
> using
> zpool import -d /dev/disk/by-id <name of pool>
> 
> I export before I reboot, but when I reboot into the full version of Debian
> 10, the pool isn't there. I can reimport it using the zpool import command,

That's expected.

zpool export prepares the zpool for use on a different system.
It is not part of the usual shutdown procedure.


> What I want to do is this;
> 
>    - Reboot in single user mode
>    - import pool.
>    - cp -a /var to /tank/var
>    - Set the mount point on /tank/var to /var
>    - Remove /var entry from /etc/fstab
>    - Export the pool
>    - Reboot
> 
> 
> And then I should have a ZFS var for VMs and Docker containers when the
> main OS imports ZFS for /var.

Don't export the pool. Unmount all ZFS mounts before or as part
of shutdown..

-dsr-


> 
> I tried this with a VM and it worked.
> Thanks
> James

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