Solution · Resilience

Server clusters. If a server fails, the business keeps running.

If everything runs on one server, a fault stops the whole business. In a cluster another server takes over automatically. We build Proxmox clusters and replace VMware along the way.

Highly available from 3 serversNo VMware licencesMigration with rollback plan

What changes for you

  • Keep working when a server fails

    Virtual machines restart automatically on the remaining servers. At most your team notices a short interruption.

  • Updates during working hours

    Running machines move to another server before an update. Weekend maintenance windows become rare.

  • No more VMware licences

    Since the Broadcom takeover VMware licences have become much more expensive for many businesses. Proxmox needs no licence; optional vendor support costs a fraction.

  • A snapshot before every change

    A snapshot before every change. If something goes wrong, the old state is back in seconds.

What it looks like

Proxmox cluster with two servers, virtual machines and ZFS storage
Several servers in one cluster, ZFS storage, virtual machines and containers spread across nodes. Managed from one interface, reachable only from the management zone.

Proof of Concept

Try Proxmox before you switch.

We move a few of your virtual machines into a test cluster. You see performance, management and failover on your own systems.

Service or project

We run it for you, or your team takes over.

As a managed service for a fixed monthly price, with updates, backup and monitoring. Or as a project with handover of network plan, runbook and all credentials.

For IT leads

Technical detailsProxmox VE · KVM · ZFS · Proxmox Backup Server
Virtualisation
Proxmox VE on Debian with KVM and LXC, vendor subscription recommended for production.
High availability
From three nodes, or two nodes plus a quorum device. Machines restart automatically on failure.
Storage
ZFS with checksums and replication between nodes.
Networks
Separate networks for cluster traffic, storage and management.
Maintenance
Live migration before updates, a snapshot before every change.
Management
Reachable only from the internal network, sign-in via single sign-on with MFA.
Migration
From VMware ESXi or Hyper-V machine by machine, with a rollback plan.

FAQ

Frequently asked questions

Is Proxmox ready for production?

Yes. Proxmox VE is developed by a Vienna-based company, built on Debian, KVM and LXC and has run in companies and data centres for years. For production we recommend the vendor subscription.

How many servers does a cluster need?

At least three for real high availability. Two servers work with an extra small quorum device.

How does migrating from VMware work?

Machine by machine. Each one is tested, cutover happens outside working hours, and the way back stays open until the end.

Who do you offer this to?

For regulated companies, professions bound by confidentiality and anyone processing sensitive data, and for companies of about 30+ staff with critical systems.

Discuss a server cluster

Free first call

Briefly describe your situation. We help you assess it and plan the next step. Reply within 24 hours on working days.

Dipl.-Ing. Samuel Ziegler, BScFounder

office [at] vetosec [dot] at

Proxmox VE clusters, VMware migration and support in Austria

vetosec builds and runs Proxmox VE clusters across Austria and migrates VMware ESXi or Hyper-V environments VM by VM.

Updated: October 19, 2026