Possible to build HA Proxmox cluster using local disks
- Thread starter sagelike
- Start date
It is possible but give little meaning since you wont be able to have anything controlled by HA - a VM can only be online migrated if disks are on shared storage. If you, however, configure Ceph on your 3 nodes then it's a completely different matter since then online migration is possible.
Hello mir,
Thanks for your reply. I have to confess that I am new to this. I understand the basic concepts but not the nuts and bolts of it all so I have my work cut out for me.
My goal is eliminate any single point of failure so if I use one external storage device then I have a new single point of failure.
DL360 G6s have lots of drive capacity so it makes sense to me to use the built-in drive capacity to create a 3-node HA cluster which hopefully simplifies configuration a little. In a sense, I am trying to set this up like Parallels PCS which allows for HA clustering using local disks.
I want to be able to live migrate VMs if necessary and have automatic failover for all VMs if one machine goes down. As I understand it, I would have the same number of drives on each machine (as needed) with automatic replication (1 or 2 always-synced copies) spread across each node.
I assume from your note then that if I use Ceph, I can accomplish this?
To gain reasonably performance with ceph you should have at least 3 or 4 dedicated disks per node for ceph. A good first tutorial can be found here: http://pve.proxmox.com/wiki/Ceph_Server
I agree with mir. For your case Proxmox+Ceph on same node seems like a good way to go to eliminate single point of failure. Assuming you have RAM and CPU to spare for Ceph OSDs, you should not have any problem at all. Big part of Ceph can be managed from Proxmox Web GUI making life much easier. From one GUI you will be able to manage both Proxmox and Ceph cluster.