ID: 12383 Title: df: The UUID can be used as part of the service item Component: Checks & agents Level: 1 Class: New feature Version: 2.1.0i1 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.