Replacing the DNS Resolver in Production Without a Postmortem: Lessons from a 18

<blockquote> <p>The pager went off at 2:14 AM.</p> </blockquote> <p>If you’ve spent any time operating distributed systems, you know that sound. It doesn’t just wake you up; it

<h2> DNS Is an Indirection Layer, Not a Lookup Table </h2> <p>The "phonebook" metaphor everyone reaches for is actively misleading — and worse, it frames DNS as solved

<p>Imagine going live with your rewritten app and within an hour support tickets start flooding in. You missed a critical feature, or worse — the new app can't handle production

<p>The Problem We Were Actually Solving</p> <p>We had a high-traffic server running our treasure hunt engine, a complex system that needed to scale quickly to handle sudden spikes

<p>If a page reads from your database, render it <strong>on demand</strong>, not during the build. Prerendering it means your build container needs a route to Postgres, and on