Werk #1846: Keep track of changes of software and hardware

The HW/SW-Inventory module now keeps tracks of changes of the hardware and software on a system: Each time an inventory is being done the outcome is being compared with the data from the last time. If a change has been detected, a copy of the previous inventory data is being stored for later reference (in var/check_mk/inventory_archive). The check HW/SW Inventory can be configured with the WATO ruleset Do hardware/software Inventory to report a WARN or CRIT state if one of hardware or software has changed.

Secondly - if you are viewing details of a host - a button Inventory History brings you to a new view of the historic development of the host's hardware and software. At the beginning this button is hidden behind the [...]-button (as usual). The history shows you each point of time where at least one item of the inventory data has changed. That way you can easily keep track of new installed software, exchanged hard disks, BIOS updates and much more.

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