Kubernetes Rolling Update Failed — Here's Exactly What to Do

One of the most common DevOps interview scenario questions:

"Your deployment rollout failed in Kubernetes. What will you do?"

Most beginners panic at this question. Senior engineers don't — because they have a clear mental framework for it.

Here is that exact framework.

Practical Answer

The priority order is everything here:

First, ensure service stability. Then analyze why the rollout failed.

Never do it the other way around. Production availability comes before investigation — always.

Step-by-Step Debug Process

Step 1: Check Rollout Status

First thing — understand exactly where the rollout stopped:

kubectl rollout status deployment/<name>

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This tells you whether the rollout is still progressing, stuck, or has failed completely.

Step 2: Check Events

kubectl describe deployment <name>

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Scroll to the Events section at the bottom.…