The Failure and Rollback of a Tailscale-Powered Hybrid K3s Cluster
The Ambition: A Hybrid-Cloud K3s Cluster When building out the underlying infrastructure for vinhthang.dev, I had a bold idea: what if I could seamlessly blend Oracle Cloud Infrastructure (OCI) instances with external, high-RAM physical nodes into a single, cohesive Kubernetes cluster? The goal was to leverage a beefy 32GB RAM external node (which we called oracle10) to host heavy Java microservices and stateful applications (like a PostgreSQL replica and Apache Pulsar), while keeping the control plane firmly rooted in my OCI Always Free arm10 instance. ...