[2.3.0] Checkmk Werk 16066 created: Add more host labels for agent based discovery on Linux

Title: Add more host labels for agent based discovery on Linux Class: feature Compatible: incomp Component: core Date: 1698148635 Edition: cre Level: 1 Version: 2.3.0b1 Werk #11742 introduced the agent based discovery of host labels. We now added the following labels for the Linux agent (example for Ubuntu): <ul> <li>"cmk/os_platform:ubuntu"</li> <li>"cmk/os_name:Ubuntu</li> <li>"cmk/os_version:22.04</li> </ul>