<p>I have a Kubernetes Cluster where the same application is running a few times but with different namespaces. Imagine</p>
<pre><code>ns=app1 name=app1
ns=app2 name=app2
ns=app3 name=app3
[...]
ns=app99 name=app99
</code></pre>
<p>Now I need to execute a cronjob every 10 minutes in all of those Pods.
The path is the same everytime.</p>
<p>Is there a 'best way' to achieve this?</p>
<p>I was thinking of a kubectl image running as 'CronJob' kind and something like this:</p>
<pre><code>kubectl get pods -A -o=custom-columns='DATA:spec.containers[?(@.image==&quot;registry.local/app-v1&quot;)].image' | xargs -i kubectl exec {} /usr/bin/scrub.sh
</code></pre>
<p>but I am pretty sure this is not the right way to go about this.</p>

<p>As mentioned by me and @Argha Sadhu one of the options would be to create cronjobs for all the pods, but it would generate 100 pods every 10 minutes, so as @LucidEx mentioned that would be fine  with storage in the cloud, but not that much in his environment.</p>
<blockquote>
<p>Concerning the storage it would be fine if it was some storage in a cloud I don't have to care about, but since it's a shared ceph storage with all it's overheads (especially ram and cpu) when you claim a volume and the need to have them zero'd on delete creating/deleting 100 storage claims every 10 minutes just isn't viable in my environment. – LucidEx</p>
</blockquote>
<hr />
<p>Another options can be found at this older <a href="https://stackoverflow.com/questions/41192053/cron-jobs-in-kubernetes-connect-to-existing-pod-execute-script">stackoverflow question</a>, similar question was asked here.</p>
<p>As @LucidEx mentioned</p>
<blockquote>
<p>I'll probably roll with a bash loop/routine instead of that python code snippet but will go with that approach.</p>
</blockquote>
<p>This python code snippet is <a href="https://stackoverflow.com/a/56760319/11977760">here</a>.</p>
