https://felix-seifert.com/blog/tags/golang/ Recent content in Golang on Felix Seifert Hugo en-gb Felix Seifert Thu, 20 Aug 2026 00:00:00 +0000 https://felix-seifert.com/blog/writing-a-basic-kubernetes-crd/ Thu, 20 Aug 2026 00:00:00 +0000 https://felix-seifert.com/blog/writing-a-basic-kubernetes-crd/ <p><em>This is part 1 of a four-part series on building a Kubernetes operator: CRDs (this post), <span class="series-upcoming" title="Coming soon">Custom Resources</span> , <span class="series-upcoming" title="Coming soon">Operators</span> and <span class="series-upcoming" title="Coming soon">Kubebuilder</span> .</em></p> <h2 id="why-i-went-looking-into-crds">Why I Went Looking Into CRDs</h2> <p>A while back, I started operating an own <a href="https://github.com/felix-seifert/gohfert-cluster" target="_blank" rel="noopener">bare metal Kubernetes cluster at home</a>, aka a home lab. To further this adventure, I have been building a small operator to automate something I used to do by hand: verifying that PostgreSQL backups can actually be restored, not just that they exist. The idea is simple:</p>