Architecture

Running a complex fleet of microservices—spanning AI document assistants, vector databases, lossless audio streamers, private DNS resolvers, and astronomical APIs—demands complete, real-time visibility. But traditional enterprise observability suites (Elasticsearch, heavy Prometheus clusters, DataDog) frequently devour gigabytes of memory and CPU cycles just to monitor a small infrastructure. In this deep dive, I break down how we architected and deployed a complete, ultra-lightweight, 360-degree Observability, Logging, Analytics, and Uptime Stack across our 3-node hybrid cloud fleet at vinhthang.dev, maintaining sub-millisecond query latencies while consuming less than 250 MB total RAM! ...

How do you turn 3 separate Always Free cloud virtual machines into a resilient, production-grade, multi-architecture Kubernetes cluster capable of running high-performance relational databases, AI vector stores, lossless music streaming, and personal cloud storage? In this post, I will break down the complete architecture of our newly deployed 3-Node Hybrid K3s Cluster running on Oracle Cloud Infrastructure (OCI) under our custom domain vinhthang.dev. 🏛️ The 3-Node Cluster Topology Oracle Cloud’s Always Free tier offers an incredible set of compute resources: ...