How would you version multiple roles in Ansible for the banking sector?

In the banking sector, where strict change control and compliance with regulations are required, versioning of Ansible roles is crucial.

I would use the following combination of approaches:

1. Version Control System (Git): Each role is stored in a separate Git repository. This allows independent versioning, branching, and review of changes for each role.

2. Semantic Versioning (SemVer): Each role follows SemVer (MAJOR.MINOR.PATCH).

   • MAJOR: Significant changes that break backward compatibility.
   • MINOR: Adding new functionality that maintains backward compatibility.
   • PATCH: Bug fixes that maintain backward compatibility. Git tags are used to mark specific versions.

3. GitFlow or similar workflow: Using branches develop (for ongoing development) and main (for stable, production-ready versions). Feature branches are created for new features or bug fixes.

4. Ansible Galaxy: For centralized management of role dependencies and their versions. A private instance of Ansible Galaxy can be used to ensure security and access control in a banking environment.

5. Requirements (requirements.yml): In playbooks (or other roles) that depend on other roles, specify the exact required version of the role in the requirements.yml file.

   # requirements.yml
   - name: common_config
     src: git@internal-git.bankname.com/ansible-roles/common_config.git
     version: 1.2.0 # Specific version
   - name: database_server
     src: git@internal-git.bankname.com/ansible-roles/database_server.git
     version: 2.1.5
   

6. Automated testing: Each commit and new role version undergoes automated testing (e.g., using Molecule). If tests fail, the version cannot be marked as stable.

7. Change log: Each role repository maintains a CHANGELOG.md or similar file documenting changes in each version. This is important for audit and understanding change history.

8. CI/CD pipeline: An automated process for building, testing, and deploying roles. On each change in main (or when a tag is created), the pipeline runs, verifies the role, creates a tag, and possibly publishes it to Ansible Galaxy.

   # Example step in CI pipeline (using GitLab CI/GitHub Actions/Jenkins)
   stages:
     - test
     - release
   
   test_role:
     stage: test
     script:
       - molecule test
   
   release_role:
     stage: release
     only:
       - tags # Run only when a tag is created
     script:
       - ansible-galaxy role import --server https://galaxy.internal.bankname.com namespace role_name --role-version $CI_COMMIT_TAG
     needs:
       - test_role
   

This approach ensures traceability, the ability to roll back to previous versions, independent testing, and strict control over role changes, which is critical for meeting security and regulatory requirements in the banking sector.