A WIP declarative k3s cluster deployment tailored for public cloud OpenStack.

• Objective: Deploy a fault-tolerant, highly-optimized k3s cluster directly on OpenStack.
• Provisioning: Nodes provisioned with NixOS via a custom image deployed to OpenStack. Ongoing updates are manged via flake-based configuration and updates.
• Cluster Auto-scaling:
  • Server nodes: Manually configured.
  • Agent nodes: Automatically deployed via Kubernetes Cluster Autoscaler.
• Ingress Controller: Integrate with the Octavia Ingress Controller.
• Storage Engine:
  • Use Longhorn as the storage engine.
  • Ensure Longhorn v2 readiness.
  • Configure Longhorn to use Cinder CSI block storage as the underlying storage.
• Datastore Backend: Experiment with Supabase as external K3s datastore.