DOP-C02 Question 283
Select 2You are managing a web application deployed across multiple AWS Regions. The application uses an Application Load Balancer (ALB) in each region, and Amazon Route 53 is configured with a latency-based routing policy to direct traffic to the region with the lowest latency. Recently, one region experienced a complete outage, but some users still experienced delays because traffic was not routed away from the affected region immediately. How can you improve the health check configuration to ensure faster failover during outages?
- A
Configure Route 53 health checks to monitor the ALB endpoints in each region and associate them with the latency-based routing policy.
- B
Increase the interval and timeout of the Route 53 health checks to reduce the frequency of health check failures.
- C
Enable ALB target group health checks and ensure that unhealthy targets are deregistered from the ALB.
- D
Set up a CloudWatch alarm to monitor ALB metrics and manually update Route 53 records when an outage is detected.
- E
Configure Route 53 health checks to evaluate the health of the web application's endpoints rather than just the ALB endpoints.
Show answer and explanation
Correct answers: A, C
Explanation
To ensure faster failover, Route 53 health checks should be configured to monitor ALB endpoints and be associated with the latency-based routing policy. This enables Route 53 to detect regional outages and automatically redirect traffic to healthy regions. Additionally, enabling ALB target group health checks ensures that unhealthy application instances are removed from the load balancer, improving reliability within a region.
- A. Correct.
Configuring Route 53 health checks to monitor the ALB endpoints ensures Route 53 can detect regional failures and redirect traffic to healthy regions. Associating these health checks with the latency-based routing policy enables automatic failover.
- B. Incorrect.
Increasing the interval and timeout of Route 53 health checks would delay the detection of failures, which is counterproductive in ensuring faster failover.
- C. Correct.
Enabling ALB target group health checks helps ensure that unhealthy targets are removed from the load balancer, improving the reliability of the application within a region.
- D. Incorrect.
Manually updating Route 53 records introduces unnecessary latency and is not a best practice for failover automation.
- E. Incorrect.
Configuring Route 53 health checks to evaluate the web application's endpoints could provide more granular health monitoring, but in this case, monitoring the ALB endpoints is sufficient and aligns with best practices.