Using only a partition instead of a whole device

[soltesz...@gmail.com]

Hi Everyone,

I am a beginner to Rook and Ceph and struggling to create a small storage cluster on an RKE deployed Kubernetes 1.15.

I have managed to build a working 3-node storage cluster with directory storage ("directories" config option under storage) but that is not supported in production, so I am trying to. 

I have VMs that have access to a single device (sda) that I can partition freely. 

I have the sda1 partition with the VMs operating system (CentOS7) and I would like to use the second partition (sda2) as Rook/Ceph storage.

Is this supposed to work in the current stable version of Rook (1.2) ?

I haven't found anything about this in the samples but a design document says that it should work: https://github.com/rook/rook/blob/master/design/ceph/ceph-volume-provisioning.md  :

"

  devices:

     ...

     # OSD on a partition (partition support is new)

      - name: sdf1

"

[Alexander Trost]

Yes, partitions can be used. Partitions must be empty and your Ceph version at least v14.2.8 or higher (if available, not v15 though).

Kind regards

Alexander Trost

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[Andras Soltesz]

Thanks

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Üdvözlettel,
Soltész András
+3670-518-7872