AWS - Architecture Best Practices
You have an AWS Systems Manager Automation runbook that restarts an EC2 instance. What will happen if the runbook execution fails halfway through?
You have an AWS Systems Manager Automation runbook that restarts an EC2 instance. What will happen if the runbook execution fails halfway through?
medium📝 service behavior Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Understand default behavior of Systems Manager Automation on failure
By default, if a step fails, the runbook stops and does not roll back changes unless explicitly configured.Step 2: Evaluate options
Automatic rollback or indefinite retries require additional setup. The runbook does not complete successfully if errors occur.Final Answer:
The runbook stops and leaves the instance in its current state -> Option BQuick Check:
Default failure behavior = stop without rollback [OK]
Quick Trick: Automation stops on failure unless rollback is configured [OK]
Common Mistakes:
- Assuming automatic rollback without configuration
- Thinking retries happen indefinitely by default
- Believing runbook ignores errors and completes
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