Director Live Modification

[ValeDaRold]

Use Case:

As a Director user, I would like to create/modify/delete monitoring objects (for example a host or service) without manual deployment and immediately see it in monitoring.

Proposed solution

As agreed with @Thomas-Gelf, the solution will be structured as follows:

• the feature can be enabled globally at module level
• as first implementation only Host and Services can be created/edit/deleted using the Live Modification
• on object creation/modification/delete submit, a new object will be saved in a dedicated database table. This object will represent the modification applied by the user
• this new object will be saved with a "scheduled" state
• the Director daemon will fetch all the pending ("scheduled") objects and the defined modifications will be applied live via the Icinga2 API
• all the modifications will be performed to the Icinga2's Director package
• for every manual deploy, all the live changes will be reset according to reflect all of the latest user changes

Additional context

This feature depends on: Icinga/icinga2#8639