dummyhost ansible_host=1.2.3.4

[all:vars]
ansible_port=22

[web]
node1 ansible_host=<X.X.X.X>
node2 ansible_host=<Y.Y.Y.Y>
node3 ansible_host=<Z.Z.Z.Z>

[web:vars]
ansible_user=ubuntu
ansible_password=PASSWORD
ansible_connection=ssh

[control]
ansible-1 ansible_host=<A.A.A.A>

[control:vars]
ansible_user=student
ansible_password=PASSWORD
ansible_connection=local