icinga

1. https://www.howtoforge.com/how-to-install-icinga-2-monitoring-software-on-debian-12/ 
2. ai -y wget curl nano software-properties-common dirmngr apt-transport-https gnupg2 ca-certificates lsb-release debian-archive-keyring ufw unzip
3. ai -y mariadb-server
4. mariadb-secure-installation
5. ai -y icinga2 monitoring-plugins
6. ai -y icinga2-ido-mysql
7. vim /etc/icinga2/features-available/ido-mysql.conf
8. icinga2 feature list
   Enabled features: api checker ido-mysql mainlog notification
9. icinga2 api setup
10. vim /etc/icinga2/conf.d/api-users.conf
11. ai nginx php-fpm php-imagick
12. icingacli setup config directory --group icingaweb2
13. icingacli setup token create
14. mysql
15. vim /etc/nginx/conf.d/icinga.conf
16. vim /etc/icinga2/features-enabled/api.conf
17. icinga2 node wizard
18. icinga2 ca list
19. icinga2 ca sign 
20. systemctl status icinga2 icingadb icingaweb2 nginx php8.2-fpm

debug

1. rm /var/lib/icinga2/certs/*
2. chown nagios:nagios /etc/icinga2/features-*