Seeking guidance for HA Cluster in business scenario

[LTS_Tom]

You can run PBS on bare metal or as I do on TrueNAS

How to Run Proxmox Backup Server on TrueNAS

And yes, backing it up to another PBS instances is ideal.

I have a hardening guide as well

🛡️ Hardening Proxmox Backup Server: Secure Permissions & Sync Jobs

Standard Proxmox setups often use the root@pam account for everything. This is a massive security risk. If one PVE node is compromised, your entire backup history can be wiped. This guide shows you how to set up a dedicated user, an “Append-Only” API token, and a secure Pull Sync job. I also recommend reading the Proxmox Docs User Management — Proxmox Backup 4.1.2-1 documentation 1. Create the Dedicated Backup User First, we create a user that is not root. This user will be our “…