ICINGA_JOIN_TICKET:  # generate on master node with: icinga2 pki ticket --cn $ICINGA_SATELLITE_CN
ICINGA_PARENT_HOST: icinga.example.com  # set ip is different from CN (FQDN)
ICINGA_PARENT_CN: icinga.example.com
ICINGA_PARENT_ZONE: master
ICINGA_SATELLITE_CN: satellite.example.com
ICINGA_SATELLITE_ZONE: icinga-satelliete-zone