Explanation:
To detect when a website is not operational before users report it, proactive monitoring is required. Amazon CloudWatch Synthetics canaries allow you to monitor your endpoints and APIs 24/7. A heartbeat canary can be configured to check the website's FQDN to ensure the page is reachable and loading correctly. While RUM (Option C) provides valuable telemetry and detects JavaScript errors, it relies on actual user traffic and therefore cannot detect issues before users encounter them.
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Question 26
A company runs a single-page web application on AWS. The application uses Amazon CloudFront to deliver static content from an Amazon S3 bucket origin. The application also uses an Amazon Elastic Kubernetes Service (Amazon EKS) cluster to serve API calls.
Users sometimes report that the website is not operational, even when monitoring shows that the index page is reachable and that the EKS cluster is healthy. A SysOps administrator must implement additional monitoring that can detect when the website is not operational before users report the problem.
Which solution will meet these requirements?
A
Create an Amazon CloudWatch Synthetics heartbeat monitor canary that points to the fully qualified domain name (FQDN) of the website.
B
Create an Amazon CloudWatch Synthetics API canary that monitors the availability of API endpoints from the EKS cluster.
C
Create an Amazon CloudWatch RUM app monitor that points to the fully qualified domain name (FQDN) of the website. Configure the app monitor to collect performance telemetry and JavaScript errors.
D
Create an Amazon CloudWatch RUM app monitor that uses the API endpoints from the EKS cluster.