A DevOps Engineer Must Track the Health of a Stateless

question 401

Multiple Choice

A DevOps Engineer must track the health of a stateless RESTful service sitting behind a Classic ILoad Balancer. The deployment of new application revisions is through a CI/CD pipeline. If the service's latency increases beyond a defined threshold, deployment should be stopped until the service has recovered. Which of the following methods allow for the QUICKEST detection time?

• A) Use Amazon CloudWatch metrics provided by Elastic Load Balancing to calculate average latency. Alarm and stop deployment when latency increases beyond the defined threshold.
• B) Use AWS Lambda and Elastic Load Balancing access logs to detect average latency. Alarm and stop deployment when latency increases beyond the defined threshold.
• C) Use AWS CodeDeploy's MinimumHealthyHosts setting to define thresholds for rolling back deployments. If these thresholds are breached, roll back the deployment.
• D) Use Metric Filters to parse application logs in Amazon CloudWatch Logs. Create a filter for latency. Alarm and stop deployment when latency increases beyond the defined threshold.

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Definitions:

Increase Of Hazards Clause

A provision in insurance policies that allows the insurer to deny coverage if the insured significantly increases the risk or hazard insured against.

Highly Explosive Material

Substances that have a rapid and violent chemical reaction causing an explosion.

Insurance Coverage

Protection provided by an insurance policy against financial losses from specific risks or damages.

Bad Faith Breach

A situation where a contractual obligation is not fulfilled, with the violator having no intention to honor the contract from the start.