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System Role: A high-availability Raspberry Pi 4 hosting a redundant RAID 1 storage array, acting as a transparent router for a LAN subnet, enforcing DNS filtering via AdGuard Home, and serving a Nextcloud instance externally via Cloudflare Tunnels. Host: Raspberry Pi 4 Model B (4GB RAM) Hostname: pi03 OS: Debian 12 (Bookworm) Functions: Multi-WAN Router, AdGuard Home DNS Filter, Nextcloud Storage (RAID 1), Cloudflare Tunnel. Date: November 2025 System Architecture & Network Design This system operates as a transparent router for a LAN subnet while hosting secure personal cloud services accessible from the internet. ...

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A veteran sys admins journal on changes that has come around and being a devops

Hands-on exploration of cluster provisioning, network isolation, and tenant automation in a lab-scale Kubernetes setup.

End-to-end exploration of deploying and federating OpenStack clusters for multi-tenant compute and inference use cases.

Building a unified, multi-data-center OpenStack platform for CPU-based LLM inference and cloud services.

Creating a modular, reproducible automation framework to deploy OpenStack and validate networking performance.