move apptainer stuff to its own role

[lbrick]

No description provided.

[gemini-code-assist]

Hello @lbrick, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

Summary of Changes

Hello team, gemini-code-assist here to provide a summary of this pull request. This PR focuses on refactoring the Ansible roles by extracting the configuration and installation steps related to Apptainer into a dedicated role named nesi.apptainer. Previously, these dependencies and tasks were part of the nesi.compute role. This change improves modularity and organization, making the roles easier to manage and understand.

Highlights

• New Ansible Role: A new Ansible role, nesi.apptainer, has been created to encapsulate all Apptainer-specific configuration and installation tasks.
• Dependency Migration: Apptainer-related package dependencies have been moved from the nesi.compute role's default variables to the new nesi.apptainer role's default variables.
• Task Migration: Installation tasks for Apptainer packages and the creation of the Apptainer session directory have been moved from the nesi.compute role (implicitly, as they are now in the new role) to the nesi.apptainer role's tasks.
• Role Inclusion: The new nesi.apptainer role has been added to the ansible/base-image.yml playbook to ensure Apptainer is installed when building the base image.

Changelog

Click here to see the changelog

• ansible/base-image.yml
  • Added the new nesi.apptainer role to the list of roles applied.
• ansible/roles/nesi.apptainer/default/main.yml
  • New file created.
  • Defined the dnf_packages variable containing the list of packages required for Apptainer.
• ansible/roles/nesi.apptainer/tasks/install.yml
  • New file created.
  • Added a task to install the packages listed in dnf_packages using dnf.
  • Added a task to ensure the /var/apptainer/mnt/session/ directory exists with appropriate permissions.
• ansible/roles/nesi.apptainer/tasks/main.yml
  • New file created.
  • Included the install.yml task file.
• ansible/roles/nesi.compute/defaults/main.yml
  • Removed the list of Apptainer-related packages from the compute_packages variable.

Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point in your pull request via creating an issue comment (i.e. comment on the pull request page) using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands.

Feature	Command	Description
Code Review	/gemini review	Performs a code review for the current pull request in its current state.
Pull Request Summary	/gemini summary	Provides a summary of the current pull request in its current state.
Comment	@gemini-code-assist	Responds in comments when explicitly tagged, both in issue comments and review comments.
Help	/gemini help	Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist is currently in preview and may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments to provide feedback.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

---

Roles keep tasks apart,
Compute and Apptainer start,
Clean code, happy heart.

Footnotes

1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩

[gemini-code-assist]

Code Review

This pull request effectively refactors the Apptainer installation logic into its own dedicated Ansible role (nesi.apptainer). This is a good improvement for modularity and maintainability of the Ansible playbooks. The changes are clear and follow the intent described in the PR title.

I have a couple of suggestions, primarily concerning the default variables in the new role, to enhance clarity and ensure all necessary dependencies are considered.

Summary of Findings

• Variable Naming in Apptainer Role Defaults: The dnf_packages variable in ansible/roles/nesi.apptainer/default/main.yml is generic. It's recommended to namespace it (e.g., apptainer_dnf_packages) for better maintainability and to avoid potential conflicts.
• Clarification on fuse2fs Dependency: The fuse2fs package is commented out in the Apptainer dependencies list. Clarification is needed on whether this is intentional, as its absence might impact Apptainer's functionality for certain use cases.

Merge Readiness

The pull request is a positive step towards better organization. However, there are a couple of medium severity items noted in the review comments regarding variable namespacing and a potentially important dependency (fuse2fs).

I recommend addressing these points to ensure the new nesi.apptainer role is robust and maintainable. Therefore, I suggest making these changes before merging. As a reviewer, I am not authorized to approve the pull request, so please ensure it undergoes further review and approval as per your team's process after addressing the feedback.