Werk #12383: df: The UUID can be used as part of the service item

Component Checks & Agents
Title df: The UUID can be used as part of the service item
Date Apr 22, 2021
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 2.1.0i1
Level Trivial Change
Class New Feature
Compatibility Compatible - no manual interaction needed

On SLES15SP2 server device names like {{/dev/sda1}} for btrfs filesystem may change after a reboot. Afterwards the filesystem service reports {{UNKNOWN - Item not found in agent output}}.

In order to solve this problem the UUID (from the command 'lsblk') can be used as item part. Basically items of btrfs filesystem services have the form {{btrfs DEVICE-NAME}} resp. {{btrfs UUID}}. This behaviour is configurable via {{Mountpoint for block devices}}.

Within the ruleset {{Filesystem discovery}} you can additonally add {{Volume name}} or {{UUID}} to every service via the option {{Item appearance}}. For btrfs this option would lead to items like {{DEVICE-NAME btrfs DEVICE-NAME}} resp. {{UUID btrfs UUID}}.

Moreover it's not allowed to mix {{Volume name}} and {{UUID}} in the parameters {{Mountpoint for block devices}}, {{Item appearance}} or {{Grouping}}.

To make this work you have to install the newest {{check_mk_agent}} for Linux.

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