tak wyglada moja struktura
├── group_vars
│   └── all
├── hosts
├── roles
│   ├── django
│   │   ├── handlers
│   │   ├── tasks
│   │   │   └── main.yml
│   │   └── templates
│   │       └── settings.j2
│   ├── gunicorn
│   │   ├── handlers
│   │   ├── tasks
│   │   │   └── main.yml
│   │   └── templates
│   │       └── gunicorn_start.j2
│   └── postgres
│       ├── handlers
│       │   └── main.yml
│       ├── tasks
│       │   └── main.yml
│       └── templates
└── site.yml

gdzie group_vars/all
---
# Postgres
dbname: myapp
dbuser: django
dbpassword: django1

gdzie hosts
[test-srv]
192.168.1.233

[all:children]
test-srv

[all:vars]
ansible_connection=ssh
ansible_ssh_user=pi
ansible_ssh_pass=raspberry

gdzie site.yml
---
- name: Instal Postgresql
  hosts: all

  roles:
    - postgres
    - django
    - gunicorn