How to Set Up Proxmox VE

Building a stable Proxmox VE cluster begins long before the actual installation. Thoughtful preparation, a clean network configuration, and a clear understanding of the infrastructure are essential for reliable operation. In this post, we share key insights and recommendations based on our own hands-on experience.

Preparation: Clear Hostnames Instead of Default Labels
A common mistake during initial setup is the use of generic hostnames such as “pve001.” While that may work for single systems, it can quickly lead to confusion in cluster environments. Our tip: use structured hostnames like pve001-at-vie-dc1. This immediately shows in which country, location, and data center the system is running. A crucial foundation for scalability, support, and documentation.

Network: Plan Structure and Redundancy from the Start
A stable network is the backbone of any Proxmox environment. Network interfaces should be pinned and clearly assigned to ensure they don’t get mixed up after a reboot. For Corosync, the core of cluster communication, we recommend a dedicated interface. Ideally, a backup connection should also be planned, for example via the storage network.

Redundancy: As Much as Possible, as Structured as Necessary
In an ideal setup, each host should have six to seven physical network interfaces to ensure comprehensive redundancy. Of course, this isn’t feasible in every environment — but the rule stands: the more, the better. Early redundancy planning avoids headaches and downtime when failures occur.

Lessons Learned: What Works in Practice
Our experience clearly shows that a well-defined network configuration is the key to a functional Proxmox cluster. Additionally, focused training and structured preparation have proven to greatly simplify operations later on. Time invested here pays off in the long run.

Conclusion: Planning Pays Off
A Proxmox cluster can be highly performant and extremely stable provided the fundamentals are right. With clear concepts, structured network design, and redundant hardware, you can build a reliable foundation. We’re happy to share our knowledge and support the implementation of best practices.