add quorum article

Author: binarypatrick

_posts/2023-02-27-quorum-qdevice.md

@@ -0,0 +1,44 @@
+---
+layout: post
+title: "Reaching Quorum with an External QDevice"
+date: 2023-02-27 00:00:00 -0500
+category: "Service Setup"
+tags: ['proxmox', 'qdevice', 'corosync']
+---
+
+Having only two nodes in my Proxmox cluster, I wanted to add a third external device to keep quorum during reboots or other outages. To do so I added an external qdevice as a node which works as a voting only member of the cluster. The qdevice has to be debian based, so I set mine up on a raspberry pi.
+
+<!--more-->
+
+First you'll need to install the following packages on your external server.
+
+```bash
+sudo apt install corosync-qnetd corosync-qdevice
+```
+
+Once the install is complete, use this command to install a package on each of your existing Proxmox nodes.
+
+```bash
+apt install corosync-qdevice
+```
+
+Now you can run the following on one of your Proxmox nodes.
+
+```bash
+pvecm qdevice setup <QDEVICE-IP>
+```
+
+You will need to have a root password available for the setup. In my case I temporarily allowed root login with password and then reverted it back to `prohibit-password` after. That configuration is found in:
+
+```bash
+sudo nano /etc/ssh/sshd_config
+```
+
+Once you've run the setup command, you'll be able to run the following to view the status and nodes.
+
+```bash
+pvecm status
+pvecm nodes
+```
+
+For additional information, [check out the documentation here.](https://pve.proxmox.com/pve-docs/chapter-pvecm.html#_corosync_external_vote_support)