The Easiest Way to Debug Kubernetes Workloads

The Easiest Way to Debug Kubernetes Workloads

Debugging containerized workloads and Pods is a daily task for every developer and DevOps engineer that works with Kubernetes. Here is the fastest and easiest way to debug and troubleshoot any application running on Kubernetes Workloads.

Debugging containerized workloads and Pods is a daily task for every developer and DevOps engineer that works with Kubernetes. Oftentimes simple kubectl logs or kubectl describe pod is enough to find the culprit of some problem, but some issues are harder to hunt down. In those cases you might try to use kubectl exec but even that might not be enough as some containers such as Distroless don't even contain shell that you could SSH into. So what do we have left, if all of the above fails? ...

There Might Just Be a Better Way…

Sometimes you need to grab a bigger hammer or just use more appropriate tool for the task at hand. In case of debugging workloads on Kubernetes, that appropriate tool would be kubectl debug, which is a new command added not too long ago (v1.18) that allows you to debug running pods. It injects special type of container called EphemeralContainer into problematic Pod allowing you to poke around and troubleshoot. This can be very useful for cases described in the intro or in any other situation where interactive debugging is preferable or more efficient. So, kubectl debug looks like the way to go, but to use it we will need ephemeral containers, so what exactly are these?

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