We now provide official packages for Raspbian on ARM chips. You can find those packages on packages.icinga.com.
You only need to add the repository and signing key, and you can start installing Icinga. Either as a agent for your existing Icinga system, or as a standalone monitoring system.
curl https://packages.icinga.com/icinga.key | sudo apt-key add - echo "deb http://packages.icinga.com/raspbian icinga-stretch main" \ | sudo tee /etc/apt/sources.list.d/icinga.list sudo apt update sudo apt install icinga2 icingaweb2
Many thanks to our users ENDA and Nicolai from the community, for helping us getting started with official packages. They are already using Raspbian and Icinga in an industrial scale, to monitor remote locations all over Europe.