# Requirements (/operations/requirements)



## A server [#a-server]

Any Linux server you have root access to: a VPS, a dedicated machine or something under your desk with a public IP address.

|                    |                                                                                                    |
| ------------------ | -------------------------------------------------------------------------------------------------- |
| **Architecture**   | x86\_64 (Intel, AMD) or ARM64                                                                      |
| **CPU and memory** | Not enforced. 2 cores and 4 GB is a comfortable start, 4 cores and 8 GB leaves real room for apps. |
| **Disk**           | 40 GB or more. Images, build caches, logs and volumes all live here.                               |
| **Ports**          | 80 and 443 open to the internet                                                                    |

Unbind itself needs part of the first server: roughly a core and 2 GB of memory for the platform, builds, logs and metrics. Servers you add later do not carry that overhead.

On servers with less than 8 GB of memory, the installer offers to create a swap file.

Use a fresh server. The installer sets up the machine the way it needs it and expects not to share it with other software.

## Operating system [#operating-system]

| Distribution      | Versions            |
| ----------------- | ------------------- |
| **Ubuntu**        | 24.04, 25.10, 26.04 |
| **Debian**        | 12, 13              |
| **Fedora**        | 43, 44              |
| **CentOS Stream** | 9, 10               |
| **Rocky Linux**   | 9 and later         |
| **AlmaLinux**     | 9 and later         |
| **openSUSE Leap** | 15 and later        |

The installer stops on anything else. Ubuntu 24.04 is the most used and the safest pick.

## A domain [#a-domain]

You need a domain, or a subdomain of one, where you can add DNS records. For example:

* `unbind.example.com` for the Unbind UI.
* `*.unbind.example.com` so that every service can get a domain like `api-k3x9pa.unbind.example.com` on its own.

The wildcard record is optional but strongly recommended. [DNS Setup](/operations/dns-setup) has the details.

## For more than one server [#for-more-than-one-server]

Every server has to reach the first one on port 6443, and the servers should be able to talk to each other freely on a private network or through the firewall. See [Servers](/operations/servers).