High Availability DNS with Pi-hole and Keepalived
Here's how it works - Two Pi-hole instances running on separate Proxmox hosts, each capable of handling all DNS traffic Keepalived creates a virtual IP address that floats between the two servers
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Building a Smart Aquarium Temperature Monitor
After one too many close calls with faulty heaters, I built a comprehensive IoT monitoring system using ESP32, MicroPython, and FastAPI that alerts me immediately if temperatures go out of range.