I wanted to automatically trigger downtime when we ran maintenance tasks on our client systems. For this I wanted to add in a bash script to make the call to Icinga2 when we start and finish the process.
In order to do this I used a could of additional command line JSON utilities jo for creating JSON from parameters and jq for reading and processing JSON responses.
The script is flexible enough to accept parameters to control duration and either trigger a host or service downtime.
https://gist.github.com/warlord0/cc76a7fce81d1a7d8cd304f020128790