Werk #17693: Limit length of Hostname to 240 chars

Component

Setup

Title

Limit length of Hostname to 240 chars

Date

Mar 4, 2025

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.5.0b1 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.4.0b1	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.3.0p29	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

Werk #16219 already limited the maximal Hostname length to 253.

As Checkmk uses the Hostname for various internal files, some suffixes and prefixes to that files lead to problems, especially on deleting such host.

With the new limit of 240 chars you still can delete a host.