Thin Provision Shared Storage

[zhoid]

Hi,

I have mounted a LUN from my SAN to my cluster environment setup with LVM appears to be the only option to setup storage that is shared.
Having Shared storage gives you options to live migrate, HA, etc but most VM's we will provision does not use > than 20% of the guest OS disk space, as a result of this we will waste allot of storage space.
LVM-Thin has no sharing capabilities.
Any recommendations?

Thanks

Zaid

 

[danielb]

NFS, ZFS over iSCSI, GlusterFS ans Ceph are alternatives which are shareable, with snapshots support and thin provisionned.

 

[LnxBil]

Any recommendations?

No, there is no viable option except LVM for a SAN-based and therefore distributed shared storage, that would be officially supported. There is GFS but it wasn't mature enough when I last tried it - lots of crashes...

All the options @danielb provided are all true, but unfortunately are either dedicated shared storage and not distributed shared storage or file based with a new storage server.

An alternative would be to have a HA-VM that gets your storage from the SAN and offers it via NFS oder ZFS-over-iSCSI to your cluster and you use it, but it adds another layer of software to your stack and is probably not what you want.

 

[gurubert]

You can use OCFS2 on the LUN, mount it and use it as a shared local directory.

 

[LnxBil]

You can use OCFS2 on the LUN, mount it and use it as a shared local directory.

Have you tried that recently? There were reports of instability with PVE.