hosts

[web]

[master]
172.26.129.221 ansible_host=172.26.129.221

[slaves]
172.26.132.138 ansible_host=172.26.132.138
172.26.133.98 ansible_host=172.26.133.98

[dbs:children]
master
slaves

[instances:children]
web
dbs

[instances:vars]
ansible_python_interpreter=/usr/bin/python3
ansible_user=ubuntu
ansible_ssh_private_key_file=~/.ssh/id_matt
ansible_ssh_common_args='-o StrictHostKeyChecking=no'