Alejandro Bonilla

I design platforms that run virtual machines, containers and AI workloads side by side: Kubernetes, SUSE Virtualization, storage and NVIDIA GPUs. I test it all on real hardware in my home lab and write up what works.

Latest from the blog

Oracle RAC 26ai on Harvester: Shared Disks as lun: Passthrough (Like VMware RDM) or Emulated Shareable Disks Oct 28, 2026
Two ways to attach Oracle RAC shared disks on Harvester, tested on one 26ai cluster on Oracle Linux 9: SCSI passthrough (lun:, like a VMware RDM) and emulated shareable disks with …
Oracle RAC 19c on Harvester: Shared SAN LUNs, Failover, and What to Pin Oct 27, 2026
A two-node Oracle RAC 19c cluster running as Harvester VMs on shared NetApp iSCSI LUNs: how the disks are attached, how udev finds them, how long failover takes after a node is …
How Many vCPUs and How Much Memory Can a Harvester VM Actually Have? Oct 20, 2026
Testing real vCPU and memory ceilings on Harvester HCI across ARM64 and x86_64: a hard 512-vCPU wall baked into QEMU’s ARM machine type, a CPU-model address-width wall that caps …
One network across four clusters: Kube-OVN interconnection on SUSE Virtualization Oct 20, 2026
I connected VMs on separate SUSE Virtualization clusters through one routed network with Kube-OVN’s OVN interconnection (OVN-IC): about 1–2 ms between sites, and a data plane that …
NVIDIA AI Cluster Runtime 1.1 deploys with Rancher Fleet and supports SLES Oct 19, 2026
NVIDIA’s AI Cluster Runtime 1.1 shipped today with two features I contributed: a Rancher Fleet deployer and SUSE Linux Enterprise Server support on RKE2. Here’s what they do, plus …

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Open source work

Harvester CLI

Maintainer

A kubectl-style command line for creating and managing VMs on SUSE Virtualization. v0.5.0 supports 1.9, prints GitOps-ready YAML and installs with Homebrew.

Repo · Post

SUSE Virtualization (Harvester)

Contributor

PXE network boot and high-performance disk settings in the UI, Cloudbase-Init for Windows guests, and the Windows VM templates with Hyper-V enlightenments.

UI extension · Post

NVIDIA AI Cluster Runtime

Contributor

A Rancher Fleet deployer and SUSE Linux Enterprise Server support on RKE2, both shipped in AICR 1.1.

Repo · Post

Longhorn v2 over RDMA

Contributor

RoCEv2 transport for Longhorn's SPDK-based v2 data engine, in review across four repositories.

PR · Post

LVM CSI driver

Contributor

Thin-pool chunk-size tuning and snapshot fixes for SUSE Virtualization's LVM storage, plus LUKS2 encryption at rest (in review).

Repo · Post

Windows golden images

Author

Build a reusable Windows Server image for SUSE Virtualization with VMDP drivers, Cloudbase-Init and sysprep, using kubectl or Terraform.

Repo · Post