DOP-C02 Question 199
Select 3An e-commerce company runs its infrastructure on AWS. The company’s production environment consists of an Auto Scaling group for web servers, an RDS instance for the database, and an S3 bucket for storing user-uploaded images. To ensure high availability and disaster recovery, the company has configured cross-region replication for the S3 bucket and set up an RDS read replica in another region. During a major regional outage, the primary region hosting the production environment becomes unavailable. What steps should the company take to recover its production environment in the disaster recovery region as quickly as possible?
- A
Promote the RDS read replica in the disaster recovery region to be the new primary database.
- B
Manually launch new EC2 instances in the disaster recovery region to replace the Auto Scaling group.
- C
Update the DNS records in Route 53 to point to resources in the disaster recovery region.
- D
Enable versioning on the S3 bucket in the disaster recovery region to prevent accidental data loss.
- E
Manually trigger the Auto Scaling group in the disaster recovery region to launch instances.
Show answer and explanation
Correct answers: A, C, E
Explanation
During a regional outage, it is crucial to quickly restore the production environment in the disaster recovery region. Promoting the RDS read replica allows for database operations, updating Route 53 ensures traffic is routed to the new region, and triggering the Auto Scaling group ensures web servers are launched. These steps collectively restore functionality with minimal manual intervention.
- A. Correct.
Correct: Promoting the RDS read replica to the primary database allows the disaster recovery region to handle write operations, which is necessary for a fully functional production environment.
- B. Incorrect.
Incorrect: Manually launching EC2 instances bypasses the benefits of using an Auto Scaling group. The Auto Scaling group should be used to automatically launch and manage instances.
- C. Correct.
Correct: Updating Route 53 DNS records ensures that user traffic is directed to the resources in the disaster recovery region.
- D. Incorrect.
Incorrect: Although enabling versioning on S3 is a best practice for data protection, it is not relevant to this specific recovery scenario since cross-region replication is already configured.
- E. Correct.
Correct: Triggering the Auto Scaling group in the disaster recovery region ensures that web server instances are launched automatically based on the configuration, enabling the environment to handle incoming traffic.