1. Introduction
This document lists the platforms and integrations supported by Checkmk 2.5.0. Except for very specific reasons (e.g. security), these platforms, including all patch versions, will remain supported through active maintenance during the Checkmk 2.5.0 product lifecycle.
2. Server OS
Checkmk can be installed on the following Linux server operating system distributions and versions that run on x86_64 hardware. To get a rough estimate of the hardware requirements, visit the similarly named page within the Checkmk website. In this article you will find a complete list of supported operating systems and their versions. Entries may contain the following additions:
LTS/LTSS versions marked as deprecated are still supported for the entire lifecycle of version 2.5.0. Support will cease afterwards.
Support for versions marked as once released is planned. Checkmk 2.5.0 packages will be made available shortly after the release of the new distribution version.
We will additionally evaluate any new versions of these distributions as a part of our ongoing support process. These will be covered in the update matrix.
| Operating system | Supported versions | Supported since Checkmk version |
|---|---|---|
Debian |
12 Bookworm |
2.5.0 |
13 Trixie | ||
14 Forky |
(once released) |
|
Red Hat Enterprise Linux |
8 |
2.5.0 |
9 | ||
10 | ||
SUSE Linux Enterprise Server |
15 SP6 (deprecated) |
2.5.0 |
15 SP7 | ||
16.0 (deprecated) | ||
16.1 |
(once released) |
|
16.2 |
(once released) |
|
Ubuntu |
22.04 LTS Jammy Jellyfish (deprecated) |
2.5.0 |
24.04 LTS Noble Numbat | ||
26.04 LTS Resolute Raccoon |
2.5.0p1 |
3. Checkmk Appliance
Checkmk 2.5.0 can run on the following versions of the Checkmk Appliance:
>= 1.7.0
4. Checkmk Relay
The Checkmk Relay is officially supported on the following distributions (x86_64 only):
Ubuntu 24.04
Red Hat Enterprise Linux 8 starting with 8.10
Red Hat Enterprise Linux 9 starting with 9.7
Red Hat Enterprise Linux 10
5. Browser
The Checkmk user interface has been verified as able to be run on the following desktop browsers and minimum versions:
Google Chrome >= 143 on Windows, Linux and macOS
Firefox >= 140 on Windows, Linux and macOS
Microsoft Edge >= 143 on Windows
Safari >= 26.2 on macOS
The Checkmk mobile user interface has been verified to run on the following mobile browsers:
Safari on iPadOS/iPhoneOS (current and last major OS release)
Google Chrome on Android (current and last major OS release)
6. Email clients
The email templates for notifications have been tested with the following email clients. We will provide timely support—in the form of a patch version—for new versions of the programs listed below—especially for webmail applications, in which users have no control over updates:
Apple Mail (iCloud), no side effects from Mail Privacy Protection (MPP)
Apple Mail (iPhone OS, macOS)
Gmail (webmail)
Gmail for Android
Outlook Desktop (all Office versions supported by Microsoft with updates; currently 2021, 2024, and 365)
Outlook.com (webmail)
Thunderbird ESR
Yahoo Mail
7. OS for the Checkmk agent
The Checkmk agent can be installed and run on the following operating systems if the OS meets some basic requirements.
7.1. Linux/Unix
All Linux distributions and various Unix operating systems such as Solaris and AIX are supported, provided they have at least the following technical components in the minimum version:
Bash >= 4.2 (Linux, Solaris)
ksh >= 93 (only AIX)
Python >= 3.6 (optional for agent plug-ins)
Perl >= 5.14.0 (optional for agent plug-ins)
Additionally, one of the following components needs to be present:
systemd >= 219
xinetd (no minimum version)
Be aware: Plug-ins may require a specific version of additional components to be functional.
Automatic agent updates
For Linux on x86_64 with glibc 2.17 or higher, binary packages of the update plug-in are available.
For other platforms or other Unix systems, this plug-in is provided as a Python script (requires Python >= 3.7).
7.2. Windows
All 64-bit versions of the following Windows operating system releases are supported:
2016
2019
2022
2025
8. Connection of other applications
8.1. Grafana plug-in
Checkmk 2.5.0 supports the following Grafana plug-in versions:
>= 3.0.0
8.2. LDAP server
With LDAP Checkmk 2.5.0 supports synchronization of the following LDAP servers:
Microsoft Active Directory
OpenLDAP
389 Directory Server
8.3. SAML IdP
The SAML integration supports the following Identity Providers (IdPs):
Microsoft Entra ID (called Azure Active Directory until 2023)
Google Cloud
Okta
Checkmk may work with other SAML integrations as well, but no support can be provided for these.
8.4. ntopng
The ntopng integration supports the following versions of ntopng Professional and Enterprise:
>= 6.0
8.5. Nagvis
Nagvis depends on PHP and requires a minimum version to run. To run Nagvis, make sure to have a matching version of PHP in your installation:
>= 7.2
Depending on the Linux distribution used, the version defined as a dependency of the Checkmk installation package may be higher.
8.6. InfluxDB
Checkmk supports the export of data to the following version of the InfluxDB API:
2
9. Software Bill of Materials
After installing Checkmk a Software Bill of Materials (SBOM) is available at ~/share/doc/bill-of-materials.json and ~/share/doc/bill-of-materials.csv.
The format of the JSON file is CycloneDX.
Please refer to the respective JSON file for the version of the underlying CycloneDX specification.
If you want to check the SBOM before download and installation, you will find a JSON file and a CSV file, along with the corresponding hash files in the Checkmk download directory. For the current version 2.5.0p18 we provide the following SBOM files:
https://download.checkmk.com/checkmk/2.5.0p18/check-mk-community-2.5.0p18-bill-of-materials.json(Hash)https://download.checkmk.com/checkmk/2.5.0p18/check-mk-community-2.5.0p18-bill-of-materials.csv(Hash)https://download.checkmk.com/checkmk/2.5.0p18/check-mk-pro-2.5.0p18-bill-of-materials.json(Hash)https://download.checkmk.com/checkmk/2.5.0p18/check-mk-pro-2.5.0p18-bill-of-materials.csv(Hash)https://download.checkmk.com/checkmk/2.5.0p18/check-mk-ultimate-2.5.0p18-bill-of-materials.json(Hash)https://download.checkmk.com/checkmk/2.5.0p18/check-mk-ultimate-2.5.0p18-bill-of-materials.csv(Hash)https://download.checkmk.com/checkmk/2.5.0p18/check-mk-ultimatemt-2.5.0p18-bill-of-materials.json(Hash)https://download.checkmk.com/checkmk/2.5.0p18/check-mk-ultimatemt-2.5.0p18-bill-of-materials.csv(Hash)
SBOM files for older Checkmk releases stay available along with the downloadable packages. If necessary, simply change the displayed link to the desired version.
10. Change log
10.1. Corrections and updates
06-May-2026
The list of supported Linux operating systems has been updated:
Ubuntu 26.04 is supported starting with patch release 2.5.0p1, available since May 6, 2026.
Addendum, 07-May-2026: Packages of Checkmk 2.5.0 for Ubuntu 26.04 were made available for testing purposes through the download archive. These have never been announced or linked from the main download page.The list of SLES versions has been updated to reflect the new naming scheme in effect since version 16.0.
28-May-2026
The list of supported Linux operating systems has been updated:
Debian 14 (Forky) has been added.
Ubuntu 22.04 will be close to end of support when the next Checkmk version is released, thus it has been marked as deprecated according to our OS support policy.
A list of supported operating systems for running the Checkmk Relay has been added.
06-Jul-2026
The list of SBOM files is now complete for all editions of Checkmk. Additionally, a note has been added explaining how to modify links to download older SBOM files.
12-Aug-2026
The list of supported email clients has been added.
15-Oct-2026
The erroneously mentioned Python 2.7 has been removed from the list of supported Python interpreters. Instead of Python > 3.5 the less ambiguous notation Python >= 3.6 is used. A note regarding the plug-in’s requirements for automatic agent updates has been added. For the shells mentioned, the operating systems where this requirement applies have been added. The hint on the legacy (1.6.0) agent for Windows has been removed since we cannot guarantee compatibility of agent output with the check plug-ins shipped with Checkmk 2.5.0 anymore.