Use PBS as a two-node cluster quorum member ?

[Fabio]

I read that you can configure PBS as the third quorum node in a two-node cluster with replicas. I set up a two node cluster and VM replicas. Now I put a proxmox backup server and connected it to my cluster. Backups work and are scheduled. I would like to use the PBX as a quorum element in order to check if one of the two nodes fails, and ensure that the VM is passed to the active node. Can you help me please?

 

[Dunuin]

See: https://pve.proxmox.com/wiki/Cluster_Manager#_corosync_external_vote_support

 

[Fabio]

forgive me if I try to install qdevice on my PBS it gives me an error: root@pbs:~# apt install corosync-qnetd
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
E: Unable to locate package corosync-qnetd
root@pbs:~# apt install corosync-qdevice
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
E: Unable to locate package corosync-qdevice
root@pbs:~#
I'm not understanding how to proceed, can you help me?

 

[Dunuin]

Thats strange as corosync-qnetd is part of the Debian 12 repo.

 

[Fabio]

I have not activated any PBS license. Do I have to put the development repos? The version I'm using is the latest one downloaded from https://www.proxmox.com/en/downloads

 

[spirit]

I have not activated any PBS license. Do I have to put the development repos? The version I'm using is the latest one downloaded from https://www.proxmox.com/en/downloads

you can use the no-subscription repo
https://pbs.proxmox.com/docs-1/package-repositories.html

 

[UdoB]

https://pbs.proxmox.com/docs-1/package-repositories.html

Da wird noch Buster referenziert, besser ist: https://pbs.proxmox.com/docs/installation.html#proxmox-backup-no-subscription-repository

;-)

 

[Fabio]

I tried again. My source.list file is:

-------------------------------------------------- -------------------------------------------------- -----------
deb http://ftp.it.debian.org/debian bookworm main contrib

deb http://ftp.it.debian.org/debian bookworm-updates main contrib

# security updates
deb http://security.debian.org bookworm-security main contrib
-------------------------------------------------- -------------------------------------------------- -----------
I tried again to put the package with apt install corosync-qnetd and it downloaded and installed it.

 

[Fabio]

Ok it seems to work. I'll summarize what I did:

put on PBS: apt install corosync-qnetd
put in the two nodes: apt install corosync-qdevice

From one of the two nodes I configured qdevice in the following way: pvecm qdevice setup 192.168.5.30

then with pve status I see:

Votequorum information
----------------------
Expected votes: 3
Highest expected: 3
Total votes: 3
Quorum: 2
Flags: Quorate Qdevice

Membership information
----------------------
Nodeid Votes Qdevice Name
0x00000001 1 A,V,NMW 192.168.5.10
0x00000002 1 A,V,NMW 192.168.5.20 (local)
0x00000000 1 Qdevice
root@node2:~#

I did a test by disconnecting the cables of the two network cards of node 2, the system migrated the two virtual machines to node 1. It worked, but it took 2 minutes and 49 seconds.

Is the time it took you right?
Consider that the nodes have active VM replicas