I am sorry that I do not know anything about icinga2. The package came standard with the installation on a Raspberry Pi 4 (CanaKit) and until I do understand the icinga2 software I have (not so nicely) disabled icinga2 from running to prevent so many emails about the “state” file and for so many entries in the syslog file. This may be totally wrong but it seems the OS software distribution should allow for these packages to be included or not.
The message in syslog:
information/ConfigObject: Dumping program state to file ‘/var/lib/icinga2/icinga2.state’
This repeats every 5 minutes. Since I am not using icinga2 (currently) I wanted first to stop the messages in syslog so that I could focus on numerous other errors/warnings in syslog.
Linux 4.19.97-v7l+ #1294 SMP Thu Jan 30 13:21:14 GMT 2020 armv7l GNU/Linux
Raspberry Pi 4 Model B Rev 1.1
Your recommendations are welcome.