<p>I'm using Datadog helm chart. I've got the exact same installation in two different clusters, both clusters have the exact same configuration.</p>
<p>In one of them I'm collecting custom metrics, plus cluster metrics.</p>
<p>In the other one I'm attempting collection of custom metrics, plus cluster metrics, but cluster metrics are not being collected.... I don't understand why, and I don't even know where to start diagnosing it.</p>

caeus
<p><strong>GKE autopilot</strong> does not collect logs for <strong>datadog</strong>, datadog itself collects, monitors and pushes to datadog.</p>
<p>Not sure how you installed with <strong>helm</strong> as it was not share but there is something called <strong>providers</strong> with datadog.</p>
<p><strong>Provider</strong> : <strong>providers.gke.autopilot</strong></p>
<pre><code>helm install &lt;RELEASE_NAME&gt; \
    --set datadog.apiKey=&lt;DATADOG_API_KEY&gt; \
    --set datadog.appKey=&lt;DATADOG_APP_KEY&gt; \
    --set clusterAgent.enabled=true \
    --set clusterAgent.metricsProvider.enabled=true \
    --set providers.gke.autopilot=true \
    --set datadog.logs.enabled=true 
    datadog/datadog
</code></pre>
<p>There could be other things to check: is <strong>Agent</strong> running, is <strong>Daemonset</strong> running?. <strong>Autopilot</strong> mostly sets(round off) the resources if anything wrong.</p>
