LVM to ZFS with NVME Raid

[chencho]

Hi all.

I'm with OVH and from templates only have Proxmox 6 (without ZFS)

My initial setup is with 2 nvme disks in raid 1

I have /var/lib/vz into /dev/nvme0n1p4 Raid

pvdisplay
  --- Physical volume ---
  PV Name               /dev/nvme0n1p4
  VG Name               vg
  PV Size               <932,37 GiB / not usable <3,34 MiB
  Allocatable           yes (but full)
  PE Size               4,00 MiB
  Total PE              238685
  Free PE               0
  Allocated PE          238685
  PV UUID               YomZul-OVNc-EgGB-wV1k-vW3e-75xq-f70mmW

pvs
  PV             VG Fmt  Attr PSize   PFree
  /dev/nvme0n1p4 vg lvm2 a--  932,36g    0

Then I umount the LVM and deleted it.

umount /dev/vg/data
lvremove /dev/vg/data

And finally create de zpool

zpool create rpool /dev/nvme0n1p4 -f

¿Have any sense add Raid device to zpool? ¿Is this the correct way to change lvm 2 zfs?

 

[apoc]

First result search on google
https://blog.fosketts.net/2017/12/11/add-mirror-existing-zfs-drive/

 

[chencho]

The post you link don’t have any information to use .

I asked about create zpool with “single” raid 1

two disks
1 raid
1 pool

And if this way is the best to migrate from lvm to zfs

 

[apoc]

I asked about create zpool with “single” raid 1

You just have clarified that you didn't read the link (or don't understand the basics of ZFS).
It explains how to add a mirror to an existing disk in a pool once you have issued

zpool create rpool /dev/nvme0n1p4 -f

Have a nice day

 

[chencho]

Hello! The link explains how to create a zpool with a disk, and then add another to the pool. It's not what I'm asking. Perhaps I have put it wrong.

The first thing I ask, is if the best way to go from LVM to ZFS is done with the steps I have followed.

The second thing I ask is if it makes sense to pool a disk in RAID1. It is a server at OVH, I will never be able to add a second or third disk to it, since I do not have access to it physically.

Obviously, we have not understood each other. But thanks for the trouble in answering. Happy (next) new year!

 

[chencho]

Well, this is not the correct way

After reboot the server hungs.

I try to do

mkfs.ext4 /dev/nvme0n1p4
wipefs -a /dev/nvme0n1p4

Then, when I create the pool I don't need to put -f flag.

But it hungs again after reboot.

Any way to change /var/lib/vz partition from LVM to ZFS? It's a fresh install, no matter the current data