I have received an email notification from Shinken about two unreachable instances, but the instances have been deleted a while ago. Example:
Notification Type: PROBLEM
Info: CRITICAL - Host Unreachable (172.16.1.115)
Date/Time: Sun 17 Mar 21:03:27 UTC 2019
`integration-slave-docker-1046` has been deleted recently.
I think Shinken generates its configuration automatically. I can not remember from which source though. LDAP?