https://nerdsid.com/tags/workloads/Recent content in Workloads on Nerdsid.comHugoen-usMon, 17 Aug 2026 10:00:00 +0000https://nerdsid.com/posts/kubernetes-daemonsets/Mon, 17 Aug 2026 10:00:00 +0000https://nerdsid.com/posts/kubernetes-daemonsets/<p>DaemonSet runs exactly one Pod per matching node, and it schedules onto new nodes automatically as they join the cluster. That&rsquo;s why CNI plugins, log shippers and node exporters are almost always DaemonSets rather than Deployments.</p> <p>Five short tasks below: three about reading an existing cluster, two about building a DaemonSet from scratch. Everything assumes the usual alias:</p> <figure class="codeblock"> <figcaption class="codeblock__header"><span class="codeblock__filename codeblock__filename--lang">Bash</span> <span class="codeblock__actions"></span> </figcaption> <div class="codeblock__body"> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl"><span class="nb">alias</span> <span class="nv">k</span><span class="o">=</span>kubectl</span></span></code></pre></div> </div> </figure> <h2 id="task-1-how-many-daemonsets-exist-cluster-wide">Task 1: How many DaemonSets exist cluster-wide?</h2> <p>The trap is the default namespace scoping — you have to ask for all namespaces explicitly:</p>