Non-HA Cluster with FC-Storage

Q

q8zx

Active Member
May 16, 2019
4
0
41
Hello Community,

We want to build a three-node cluster with the following requirements:

- FibreChannel Storage connected to all Nodes
- Ability to make VM-based Snapshots
- Live-Migration is *not* a requirement - being able to move halted VMs is enough
- Ceph/GlusterFS is not a possibility

I understand that sharing a LUN between nodes is just possible with the lvm-backend and therefore with out snapshots.
We could use different LUNs on each node but it is my understanding that in this case (offline)-migration would copy the vm over network from one lun to the other. Is that understanding correct? Is there any other reasonable way to utilize the FC-Storage on a Cluster?

Thanks!
 
Old style FC/SAN has limited functionality, in your case no VM snapshots.

Best feature-set: Ceph
 
I think that you could create 1 lun for each node, consider this lun as a local-disk. (and maybe use lvm-thin on top of each lun, to have snapshot).

then for live migration, you can use new migrate local disk.
but you need to copy all datas.

also, if you have a node crash, it could be possible to manually reattach the lun to the other nodes.
 
You must log in or register to reply here.
Top Bottom