Proxmox Cluster QDevice Raspberry Pi
In this video we show you how to setup a qdevice for a Proxmox cluster
A cluster needs at least 2 voting servers for activity and so you should have a minimum of 3 servers in the cluster in case one becomes unavailable
If you only had two nodes and one failed, you will find certain things don't work including being able to login to the cluster
Proxmox allows you to setup what is known as a qdevice and add this into your cluster instead of a third node
Basically it just provides the extra vote needed
The qdevice needs to run Debian and this could be something as simple as a Raspberry Pi or a VM on a NAS for instance
This is very useful if you only need 2 nodes in a Proxmox cluster to provide redundancy for your VMs, because it can save wasting money on a third server which would likely do nothing more than just vote
Hardware Suggestions:
Raspberry Pi 4 Kit
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Steps Taken
1) Set up qdevice e.g. Raspberry Pi:
Install the corosync-qnetd package
sudo apt install corosync-qnetd
Allow root SSH Login
sudo nano /etc/ssh/sshd_config
PermitRootLogin yes
NOTE: Although root access via SSH isn't recommended, Proxmox will use it's root account to login to the qdevice and so the root passwords must also match
Restart service
sudo systemctl restart ssh
Change root password
sudo passwd root
2) Set up PVE Nodes:
Install the corosync-qdevice package on all nodes
apt install corosync-qdevice
NOTE: All nodes in the cluster will need to be configured and online to do this
3) Add the qdevice
pvecm qdevice setup 'qdevice_ip_address'
As part of this, the ssh keys from the cluster will be copied to the qdevice
Check the results
pvecm status
Chapters
00:00 Intro
01:22 Assumptions
02:10 Requirements
02:58 Install qnetd Software
03:34 Allow Root Login
05:03 Change Root Password
05:53 Install qevice Software
06:34 Set up qdevice
07:53 Status Check
09:03 Testing
Credits
LoveLife | Instrumental Prod. Blue Mango | EQMUSEQ.COM by Don Da Vinci
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