Werk #17890: Agent controller: Support IPv6 in --server argument of register and register-new subcommands

Component

Checks & agents

Title

Agent controller: Support IPv6 in --server argument of register and register-new subcommands

Date

Apr 1, 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)
2.4.0b4	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

Prior to this werk, cmk-agent-ctl reported

error: Invalid value for '--server <server>': Failed to split into server and port at ':'

when attempting to pass an IPv6 address to the --server argument. As of this werk, IPv6 addresses are supported. Note that they must be enclosed in square brackets. Examples:

3a02:87b0:504::2
[3a02:87b0:504::2]:8000

As a further improvement, cmk-agent-ctl now performs additional validation on the value of the --server argument. Before, only the port number was validated (if specified). Now, cmk-agent-ctl additionally validates the IP address or hostname. Note that this additional validation is fully compatible, since an invalid value anyway lead to an error later on when attempting to contact the Checkmk server using an invalid hostname or IP address.

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