May 2019
Intermediate to advanced
308 pages
8h 5m
English
Content preview from AWS Certified Advanced Networking - Specialty Exam Guide
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Health checking
Certain routing policies in Route 53 also support health checks. A health check will allow the DNS service to check the target and determine whether the response it receives is healthy or not. A Route 53 health check can either be TCP or HTTP/HTTPS based. The TCP check will simply check the response on the port, while a HTTP/HTTPS health check can also check for a specific string in the origin. Health checks can also include a maximum response time, which can also determine whether the site is responding too slowly to be of any use to clients.
The health-check operation is demonstrated in the following diagram:
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