Add server as non-voting member of cluster?

[garbled]

I'm wondering if I can add a server as a non-voting member of a cluster. I currently have a cluster of 5 machines, and want to build one more, that is more or less dedicated to running a specific application. However, I would like the ability to disk-migrate a VM over to the main cluster for upgrades/emergencies.

Is this even possible?

 

[shrdlicka]

Hi,
yes, you can set the number of for one node to zero (see example pve-cl5 below). But as far as I know, you can't set the expected votes lower than the number of nodes in the cluster currently active.

...
  node {
    name: pve-cl4
    nodeid: 1
    quorum_votes: 1
    ring0_addr: 192.168.18.14
  }
  node {
    name: pve-cl5
    nodeid: 4
    quorum_votes: 0
    ring0_addr: 192.168.18.15
  }
...

 

[garbled]

Thank you. Hrmm. that might not solve my actual problem, which is that I don't want to mess up my existing quorum.

 

[czechsys]

Only disk migration? Use shared/network storage or something as zfs sync.

 

[garbled]

The idea is that I want to build a proxmox server to run my pfsense. I want it to normally have as few interdependencies as possible, so it should be able to come up on it's own, if the whole network is down. However, I want to be able to move the vm off for a few minutes for patching of the underlying proxmox server when needed, and not lose the internet.

So my idea was to hook it into my large 5-node cluster, and then do a disk migration when needed, and then migrate back. But if the proxmox host running pfsense is a voting member, now I have a 6-node, and sadness.

 

[Neobin]

However, I want to be able to move the vm off for a few minutes for patching of the underlying proxmox server when needed, and not lose the internet.

If this is the only goal, you could run a second pfSense on your cluster and setup both in pfSense's own HA [1].

[1] https://docs.netgate.com/pfsense/en/latest/highavailability/index.html

 

[garbled]

I didn't even think about that. OK, great idea!