Add support for global OpenZFS quotas on user home directories

Summary

Add support for configuring global quotas on Amazon FSx for OpenZFS user home directories to limit storage consumption per user. This feature was requested by a customer to prevent individual users from consuming excessive storage space.

Background

Currently, the PTD infrastructure creates FSx for OpenZFS file systems without setting quotas on user home directories. This means users can consume unlimited storage, potentially affecting cost and performance for the entire deployment.

Proposed Solution

Implement support for OpenZFS native quota features in the PTD infrastructure code:

1. Add a configurable parameter for global user home directory quota (e.g., user_home_quota_gb)
2. Modify the FSx OpenZFS provisioning logic in python-pulumi/src/ptd/pulumi_resources/aws_fsx_openzfs_multi.py to create child volumes with quota configurations
3. Ensure quotas are applied when user home directories are created

Implementation Details

• Component: PTD Infrastructure (Python Pulumi)
• Primary files:
  • python-pulumi/src/ptd/pulumi_resources/aws_fsx_openzfs_multi.py
  • Related configuration in workload setup
• Quota mechanism: OpenZFS native quota property on volumes/datasets
• Scope: Global quota applied uniformly to all user home directories

Acceptance Criteria

• Configuration parameter added for specifying global user home quota
• User home directories are created as OpenZFS volumes with quota property set
• Quota is enforced by OpenZFS filesystem
• Documentation updated with quota configuration instructions
• Tested on at least one staging environment

References

• OpenZFS quota documentation: https://openzfs.github.io/openzfs-docs/man/master/7/zfsprops.7.html#quota
• AWS FSx for OpenZFS: https://docs.aws.amazon.com/fsx/latest/OpenZFSGuide/managing-volumes.html

Priority

Medium - Enhancement requested by a customer

Start by reading python-pulumi/src/ptd/pulumi_resources/aws_fsx_openzfs_multi.py and tracing the related workload setup configuration. Use the OpenZFS quota and AWS FSx references to understand the requested volume behavior, then validate the configuration and enforcement in a staging environment. Done means global user-home quota configuration, documentation, and staging verification are present.