[PVE-User] How to use lvm on zfs ?

[Denis Morejon]

El 07/08/18 a las 10:45, Mark Schouten escribió:
> On Tue, 2018-08-07 at 11:30 -0400, Denis Morejon wrote:
>> These is not possible because I don't use zfs on the eight nodes ?
>> Just
>> in 4 of them and modifying /etc/pve/storage.cfg is a cluster wide
>> operation!
> Ah yes, crap. That's right..
>
>> Now the problem is that I have 4 nodes with local-lvm storage active
>> and
>> 4 nodes with just local storage active, because in these  last nodes
>> the
>> local-lvm is disabled! (Due to the non-existence of any lmv volumen
>> group)
>>
>> So, the migrations of MVs between all these nodes cause problems.
> Ok. Not sure if this is supposed to work, but what if you create a ZFS
> Volume (zfs create -V 100G rpool/lvm) and make that a PV (pvcreate
> /dev/zvol/rpool/lvm) and make a VG (vgcreate pve /dev/zvol/rpool/lvm)
> and then a LV (lvcreate -L100% pve/data) ? Does that allow you to use
> local-lvm?
>
> (Not 100% sure about the commands, check before executing)
>

This is the idea Mark! But I suspect I have no space to create an 
additional zfs volume since the one mounted on "/" occupied all the space.
So I have to know how reduce It first, and then create the new one on 
the remaining space.