sudo wget -O - http://packages.icinga.com/icinga.key | sudo apt-key add -
add-apt-repository 'deb http://packages.icinga.com/ubuntu icinga-bionic main'
apt-get install icingaweb2 libapache2-mod-php icingacli
sudo icingacli setup token create
#トークンを記録しておく

#apiは不要
sudo icinga2 feature disable api

icinga2 node wizard

/etc/icinga2/conf.d

hosts.conf