[PVE-User] Reinstall Proxmox with Ceph storage

[Alwin Antreich]

Hello Gilberto,

On Mon, Aug 05, 2019 at 04:21:03PM -0300, Gilberto Nunes wrote:
> Hi there...
> 
> Today we have 3 servers work on Cluster HA and Ceph.
> Proxmox all nodes is 5.4
> We have a mix of 3 SAS and 3 SATA, but just 2 SAS are using in CEPH storage.
> So, we like to reinstall each node in an HDD SSD 120GB in order to you
> the third SAS into SAS CEPH POOL.
> We get 2 POOL's:
> SAS - which content 2 HDD SAS
> SATA - which content 3 HDD SATA
> 
> In general we need move the disk image in SAS POOL to SATA POOL?
> Or there any other advice in how to proceed in this case??
As you have 3x nodes, you can simply do it one node at a time. Assuming
you are using a size 3 / min_size 2 for your Ceph pools. No need to move
any image.

Ceph OSDs are portable, meaning, if you configure the newly installed
node to be connected (and configured) to the same Ceph cluster, the OSDs
should just pop-in again.

First deactivate HA on all nodes. Then you could try to clone the OS
disk to the SSD (eg. clonezilla, dd). Or remove the node from the
cluster (not from Ceph) and re-install it from scratch. Later on, the
old SAS disk can be reused as additional OSD.

--
Cheers,
Alwin