Amazon Exam SOA-C02 Topic 5 Question 92 Discussion

Actual exam question for Amazon's SOA-C02 exam

Question #: 92
Topic #: 5

A company has a production application that runs on large compute optimized Amazon EC2 instances behind an Application Load Balancer (ALB). The instances are in an Amazon EC2 Auto Scaling group. The Auto Scaling group has a desired capacity of 2, a maximum capacity of 2. and a minimum capacity of 1.

The application is CPU-bound. The EC2 instances show consistent CPU utilization of 90% or greater during peak usage periods. These peak usage periods are unpredictable and cause performance issues and latency issues.

Which solution will automate the resolution of these issues?

ADeploy additional instances outside the Auto Scaling group. Create a new target group that includes the existing instances and the additional instances as targets. Reconfigure the ALB to direct traffic to the new target group.

BIncrease the maximum capacity of the Auto Scaling group. Change the instances to a burstable instance type

CIncrease the maximum capacity of the Auto Scaling group. Configure a scaling policy to add instances when instance CPU utilization is greater than 80%.

DIncrease the desired capacity of the Auto Scaling group. Configure a scaling policy to add instances when instance CPU utilization is greater than 80%.

Show Suggested Answer

Suggested Answer: A

Here are the steps to configure an Amazon S3 bucket to serve a static error page in the event of a failure at the primary site:

Find the existing S3 bucket named lab-751906329398-26023898.com and click on it.

In the 'Properties' tab, click on 'Static website hosting' and select 'Use this bucket to host a website'.

In 'Index Document' field, enter the name of the object that you want to use as the index document, in this case, 'index.html'

In the 'Permissions' tab, click on 'Block Public Access', and make sure that 'Block all public access' is turned OFF.

Click on 'Bucket Policy' and add the following policy to allow public read access:

{

'Version': '2012-10-17',

'Statement': [

{

'Sid': 'PublicReadGetObject',

'Effect': 'Allow',

'Principal': '*',

'Action': 's3:GetObject',

'Resource': 'arn:aws:s3:::lab-751906329398-26023898.com/*'

}

]

}

Now navigate to the Amazon Route 53 service, and find the existing hosted zone named lab-751906329398-26023898.com.

Click on the 'A record' and update the routing policy to 'Primary - Failover' and add the existing ALB as the primary record.

Click on 'Create Record' button and create a new secondary failover alias record for the domain lab-751906329398-26023898.com that routes traffic to the existing S3 bucket.

Now, when the primary site (ALB) goes down, traffic will be automatically routed to the S3 bucket serving the static error page.

Note:

You can use CloudWatch to monitor the health of your ALB.

You can use Amazon S3 to host a static website.

You can use Amazon Route 53 for routing traffic to different resources based on health checks.

You can refer to the AWS documentation for more information on how to configure and use these services:

https://aws.amazon.com/s3/

https://aws.amazon.com/route53/

https://aws.amazon.com/cloudwatch/