roles

https://docs.ansible.com/ansible/latest/user_guide/playbooks_reuse_roles.html

To generate a role
ansible-galaxy init <role name>

As noted in Creating Reusable Playbooks, include and import statements are very similar, however the Ansible executor engine treats them very differently.
• All import* statements are pre-processed at the time playbooks are parsed.
• All include* statements are processed as they are encountered during the execution of the playbook.



roleName/
|- defaults
 |--- main.yml
|- files
|- handlers
 |--- main.yml
|- meta
 |--- main.yml
|- tasks
 |--- main.yml
|- templates
|- tests
 |--- inventory
 |--- test.yml
|- vars
 |--- main.yml
|- README.md



Example project structure

site.yml
webservers.yml
fooservers.yml
roles/
   common/
     tasks/
     handlers/
     files/
     templates/
     vars/
     defaults/
     meta/
   webservers/
     tasks/
     defaults/
     meta/