2 Nodes Proxmox Cluster -qdevice

[ebolgen]

Hi everyone,

I've currently only 2 nodes. Proxmox it seems that a minimum of 3 nodes ( votes ) are required to maintain quorum.

During my failover tests I realized that when one node becomes unavailable, the cluster loses quorum and HA cannot properly perform failover.
While investigating this, I found that Proxmox supports something called qdevice, which is small linux server that provides a third vote to maintain quorum in a 2-node cluster.This seems to be recommended way to enable HA with two nodes.

However, according to the best practices documentation, qdevice is typically expected to be located in same network as cluster. In our case we don’t have a third physical node or server available in those locations, so I’m considering deploying this qdevice in another location, mean far away from 2 nodes and configure on different network.

I’m curious how this setup would behave in best practice and whether anyone here has already implemented a remote qdevice for a two-node Proxmox cluster. if anyone has experience or recommendations regarding this sceniro please share with us.

Thanks in advance.

 

[beisser]

qdevice in a 3rd location works just fine as long as the latency doesnt become too atrocious.
you could place it for example in another city and connect it via vpn to your proxmox-network, or deploy it in the cloud.

the only thing i would avoid is an unstable connection.
so whatever location you choose for the qdevice, make sure it has proper stable access to your proxmox network (latency is largely irrelevent here).