[all]
localhost ansible_connection=local physical_host=localhost ansible_become=True
container1 ansible_host=10.100.100.2 ansible_become=True ansible_user=root
container2 ansible_host=10.100.100.3 ansible_become=True ansible_user=root
container3 ansible_host=10.100.100.4 ansible_become=True ansible_user=root

[all_containers]
container1
container2
container3