This is a guest blogpost from Dave Kempe from Sol1 At Sol1, we provide services around scaling and automating Icinga rollouts for customers. In large environments, we make heavy use of the excellent distributed monitoring features of Icinga to build redundant clusters across datacenters. Icinga uses the object types of Endpoints and Zones to designate the cluster layout, where a Zone contains Endpoints, and may have a parent Zone. Using this logic, a Zone with no parents is the top level zone.