May 2026 monthly summary for sapcc/nova focusing on delivering secure and auditable resource accounting in the scheduler. In May, delivered a targeted sanitization of scheduler hints to enforce resource accounting, via a cherry-picked patch on sapcc/nova. The change strips internal _nova-prefixed hints from user requests before they reach the scheduler, preventing bypass of resource accounting while maintaining compatibility with unknown hints. Closes bug #2151252; implemented with cross-team collaboration (Assisted-By: Cursor).

October 2024 focused on delivering NVIDIA Mdevs multi-guest GPU sharing architecture for the OpenStack integration in the architecture repo. Key deliverables include a validated design for Nvidia mediated devices (Mdevs) that enables multiple guest VMs to share a single physical GPU, deployment/configuration files for the OpenStack control plane, and resource provider mappings to manage GPU resources efficiently across tenants. This work strengthens multi-tenant GPU support, improves hardware utilization, and reduces operating costs for OpenStack clusters. The commit c2db68fba2c349e6beb90c7b0f3551f228decc4b implements "Add nvidia-mdev mutli-type VA" as part of the feature. Impact: Enables scalable GPU sharing, accelerates time-to-value for GPU-enabled workloads, and lays groundwork for further automation and testing. Skills/Tech: OpenStack architecture, Nvidia Mdevs integration, Kubernetes operators, deployment automation, resource provider mapping, validation and architecture design.

In July 2024, delivered a critical bug fix for CPU governor validation scoped to online CPU cores, reinforcing CPU power management reliability for sapcc/nova. The change prevents governor strategy validation from running on offline cores and includes new tests to verify behavior of dedicated CPUs across online/offline states. The patch was cherry-picked to ensure quick risk reduction and consistent behavior across builds.