[PVE-User] question regarding quorum/qdevice on raspberry pi for dual-node cluster

Aaron Lauterer a.lauterer at proxmox.com
Thu Feb 20 14:56:59 CET 2020


That wiki page describes how to set up a full corosync instance on the RPI.

Using one with Qdevice and the corosync-qnetd service installed on it is 
fine. See our documentation for it [0].

I updated the warning on the Wiki page to make it clearer why that wiki 
page needs to be considered with care.


[0] 
https://pve.proxmox.com/pve-docs/pve-admin-guide.html#_corosync_external_vote_support

On 2/20/20 1:40 PM, Roland @web.de wrote:
> hello,
> 
> on this page https://pve.proxmox.com/wiki/Raspberry_Pi_as_third_node
> there is told:
> 
> "Raspberry Pi as third node - This is only suited for testing or homelab
> use. Never use it in a production environment! Simply use a QDevice!""
> 
> On https://pve.proxmox.com/wiki/Roadmap  for Proxmox 5.4 there is the
> following announcement:
> 
> QDevice support via `pvecm`
> 
>   * primarily for small 2-node clusters adding a qdevice can help
>     mitigate the downside of not being able to reboot one node without
>     losing quorum (and thus the ability to make any changes in the
>     cluster) ** Can also help in clusters with a larger even number of
>     nodes by providing a tie-break vote.
>   * Integration into pvecm and PVE stack vastly simplifies adding a
>     qdevice (it was possible manually before as well)
> 
> 
> my question is why there is  information around which looks like
> discouraging rasperry pi as third node for quorum, i.e.  is a raspberry
> pi with Qdevice  (
> ->https://blog.jenningsga.com/proxmox-keeping-quorum-with-qdevices/ )
> suitable for production use or not ?
> 
> regards
> roland
> 
> 
> 
> 
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