Route 53 Quiz
You are designing an architecture on AWS with disaster recovery in mind. Currently the architecture consists of an ELB and underlying EC2 Instances in a primary and secondary region. How can you establish a switchover in case of failure in the primary region?
A. Use Route 53 Health Checks and then do a failover.
B. Use CloudWatch metrics to detect the failure and then do a failover.
C. Use scripts to scan CloudWatch logs to detect the failure and then do a failover.
D. Use CloudTrail to detect the failure and then do a failover.
A. Use Route 53 Health Checks and then do a failover.
AWS Documentation mentions the following:
If you have multiple resources that perform the same function, you can configure DNS failover so that Route53 will route your traffic from an unhealthy resource to a healthy resource. For example, if you have two web servers and one web server becomes unhealthy, Route53 can route traffic to the other web server.
For more information on configuring DNS failover using Route 53, one can refer to the below link:
https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-failover.html
