Proxmox Cluster with SBC Raspberry Pi as Quorum Device

Adding SBC Raspberry Pi device as Quorum Device to Proxmox Cluster. This is to accommodate limited machines running Proxmox Cluster, e.g. cluster with 2 mini pc machines and 1 SBC Raspberry PI. Such environment is not recommended and would expect more efforts and times to maintain the environment. Recommended environment is minimum 3 machine running Proxmox Cluster.

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Prerequisite : Proxmox Cluster Setup

• Add Proxmox hostnames to /etc/hosts . Adding Raspberry Pi hostname is optional.

• Node 1 : Create Cluster via Proxmox GUI Cluster name: pve-cluster (name yourself) Cluster network: recommend to choose separate (dedicated) network for cluster
• Retrieve Cluster Information Datacenter — Cluster -> Join Information -> Copy Information
• Node 2 : Join Cluster Join Cluster : Paste Cluster Information Cluster network: choose the network similar during cluster creation
• Cluster Information Figure

• Check Cluster Status Expected vote is 3, therefore status would display as not Quorum yet.

pvecm status

Adding SBC Raspberry Pi 2 Model B as Quorum Device

• SBC Raspberry Pi : Update package

rpi# apt update 
rpi# apt upgrade

• SBC Raspberry Pi : Install Corosync

rpi# apt install corosync-qnetd

• SBC Raspberry Pi : Enable & Start Corosync

rpi# systemctl enable corosync-qnetd
rpi# systemctl start corosync-qnetd

• SBC Raspberry Pi : Check Corosync status

rpi# ss -lntp | grep qnetd
rpi# systemctl status corosync-qnetd
rpi# journalctl -u corosync-qnetd

• Add Quorum device to the Cluster

pvemini01# pvecm qdevice setup <QDEVICE-IP>   # change qdevice-ip with raspberry pi device

• Check Cluster Status New quorum device is added as Qdevice and Quorate is Yes

pvemini01# pvecm status
Cluster information
-------------------
Name:             pve-cluster
Config Version:   3
Transport:        knet
Secure auth:      on

Quorum information
------------------
Date:             date
Quorum provider:  corosync_votequorum
Nodes:            2
Node ID:          0x00000001
Ring ID:          1.45e
Quorate:          Yes

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 192.168.2x.xx (local)
0x00000002          1    A,V,NMW 192.168.2x.xy
0x00000000          1            Qdevice

• Adding Quorum device is completed.

Reference Setup:

• Proxmox VE 8.4.1
• 2 Lenovo P330 Tiny Workstation (ThinkStation) with Intel CPU i7–8700T and 32 MB RAM
• 1 SBC Raspberry Pi 2 Model B 1GB RAM - DietPi v9.12.1