Tailscale on Vinh Thang's AI Tech Noteshttps://vinhthang.dev/tags/tailscale/Recent content in Tailscale on Vinh Thang's AI Tech NotesHugoen-usSun, 30 Aug 2026 19:30:00 +0700The Failure and Rollback of a Tailscale-Powered Hybrid K3s Clusterhttps://vinhthang.dev/posts/the-tailscale-k3s-hybrid-cloud-failure/Sun, 30 Aug 2026 19:30:00 +0700https://vinhthang.dev/posts/the-tailscale-k3s-hybrid-cloud-failure/<h1 id="the-ambition-a-hybrid-cloud-k3s-cluster">The Ambition: A Hybrid-Cloud K3s Cluster</h1> <p>When building out the underlying infrastructure for <code>vinhthang.dev</code>, 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?</p> <p>The goal was to leverage a beefy 32GB RAM external node (which we called <code>oracle10</code>) 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 <code>arm10</code> instance.</p>