[all:vars]
ansible_python_interpreter=/usr/bin/python3

[webservers]
# webserver1.example.com ansible_host=192.168.1.10
# webserver2.example.com ansible_host=192.168.1.11

[dbservers]
# dbserver1.example.com ansible_host=192.168.1.20
# dbserver2.example.com ansible_host=192.168.1.21

[appservers]
# appserver1.example.com ansible_host=192.168.1.30
# appserver2.example.com ansible_host=192.168.1.31

[dockerservers]
# docker1.example.com ansible_host=192.168.1.40
# docker2.example.com ansible_host=192.168.1.41

[all:children]
webservers
dbservers
appservers
dockerservers