Explanation
Oracle supports the use of Ansible for cloud infrastructure provisioning, orchestration, and configuration management. Ansible allows you to automate configuring and provisioning your cloud infrastructure, deploying and updating software assets, and orchestrating your complex operational processes.
What enables orchestrating, provisioning, and configuration management tasks are the Ansible modules for Oracle Cloud Infrastructure. Ansible provides a library of these Ansible modules "out of the box" for managing common tasks, and libraries of custom modules from cloud providers like AWS and Azure. Oracle also provides a library of Ansible cloud modules that support provisioning and managing Oracle Cloud Infrastructure service Ansible Modules represent discrete provisioning tasks or operations that you can invoke individually from the command line, or else run individually or in sequence from a playbook Ansible roles are units of organization that allows you to abstract configuration, orchestration, and provisioning tasks into roles that you can save and share among playbooks and other users, and that are useful for organizing functionality in playbooks
https://docs.cloud.oracle.com/en-us/iaas/Content/API/SDKDocs/ansible.htm