https://nerdsid.com/tags/cka/Recent content in Cka on Nerdsid.comHugoen-usMon, 17 Aug 2026 09:15:00 +0000https://nerdsid.com/posts/kubernetes-resource-limits/Mon, 17 Aug 2026 09:15:00 +0000https://nerdsid.com/posts/kubernetes-resource-limits/<p>Resource limits look trivial on a slide and then bite you at 3 AM when a container keeps restarting with exit code 137. This lab walks through five short tasks on Pod requests and limits — reading them, diagnosing a crash caused by them, and changing them on a live cluster.</p> <p>Everything below 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-identify-the-cpu-requirements-on-the-rabbit-pod">Task 1: Identify the CPU requirements on the <code>rabbit</code> Pod</h2> <p>A Pod called <code>rabbit</code> is running in the <code>default</code> namespace. The question asks for its <strong>CPU requirement</strong> — which means the <em>request</em>, not the limit.</p>