Learn 101

• 100: KEEPE IT SIMPLEME How works a hierarchical data lookup?

  • Query a key

  • Kheops is composed of 2 parts:

    • It will first look in different locations the key. It is usually files, but it can also be an url or anything.

  • Lookup data in a tree of files

    • Goes sequentially according the backends list

      • Backend/Engine list is modular

      • Engine Plugin: Jerakia/HIera/Ansible/Curl

      • Backend Plugin: loop/hier

    • All result are returned, and then the rules are applied

    • Rules match to a key and apply a strategy (essentially determine if and how the different value are merged or replaced). It can also apply filter to the result and modify its content (future).

      • This is modular

      • Strategy: last/schema

        • Last will always take the last found value, whatever what it previously found.

        • schema: It will take into account the strucutre of the data and try to merge them intelligentelly.

    • Then it returns the result