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Question 284 - SOA-C02 discussion

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A company runs an application on Amazon EC2 instances behind an Application Load Balancer. The EC2 instances are in an Auto Scaling group. The application sometimes becomes slow and unresponsive. Amazon CloudWatch metrics show that some EC2 instances are experiencing high CPU load.

A SysOps administrator needs to create a CloudWatch dashboard that can automatically display CPU metrics of all the EC2 instances. The metrics must include new instances that are launched as part of the Auto Scaling group.

What should the SysOps administrator do to meet these requirements in the MOST operationally efficient way?

A.
Create a CloudWatch dashboard. Use activity notifications from the Auto Scaling group to invoke a custom AWS Lambda function. Use the Lambda function to update the CloudWatch dashboard to monitor the CPUUtilization metric for the new instance IDs.
Answers
A.
Create a CloudWatch dashboard. Use activity notifications from the Auto Scaling group to invoke a custom AWS Lambda function. Use the Lambda function to update the CloudWatch dashboard to monitor the CPUUtilization metric for the new instance IDs.
B.
Create a CloudWatch dashboard. Run a custom script on each EC2 instance to stream the CPU utilization to the dashboard.
Answers
B.
Create a CloudWatch dashboard. Run a custom script on each EC2 instance to stream the CPU utilization to the dashboard.
C.
Use CloudWatch metrics explorer to filter by the aws:autoscaling:groupName tag and to create a visualization for the CPUUtilization metric. Add the visualization to a CloudWatch dashboard.
Answers
C.
Use CloudWatch metrics explorer to filter by the aws:autoscaling:groupName tag and to create a visualization for the CPUUtilization metric. Add the visualization to a CloudWatch dashboard.
D.
Use CloudWatch metrics explorer to filter by instance state and to create a visualization for the CPUUtilization metric. Add the visualization to a CloudWatch dashboard.
Answers
D.
Use CloudWatch metrics explorer to filter by instance state and to create a visualization for the CPUUtilization metric. Add the visualization to a CloudWatch dashboard.
Suggested answer: C

Explanation:

CloudWatch Metrics Explorer is a powerful tool for creating dynamic dashboards based on tags. This method is efficient for monitoring Auto Scaling groups:

Use Metrics Explorer: Navigate to the Metrics Explorer in the CloudWatch console and select the CPUUtilization metric. Use the aws:autoscaling:groupName tag to filter the metric, ensuring that it only shows data for EC2 instances within the specified Auto Scaling group.

Create Visualization: Configure the visualization settings as needed and add it to a CloudWatch dashboard.

Monitor Automatically: This setup will automatically update to include metrics from new EC2 instances that join the Auto Scaling group, without any need for manual intervention or scripting.

AWS Documentation

Reference: You can learn more about using Metrics Explorer here: Using CloudWatch Metrics Explorer.

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asked 16/09/2024
Arkadius Thoma
49 questions
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