AWS Certified Developer - Associate
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Your company operates numerous EC2 instances, all of which are running on the Linux operating system. These instances are strategically distributed across several Availability Zones within the eu-west-3 region. Recently, your manager has tasked you with gathering system memory metrics from every one of these EC2 instances by employing a script.
What solution would effectively enable you to collect this data?
Your company operates numerous EC2 instances, all of which are running on the Linux operating system. These instances are strategically distributed across several Availability Zones within the eu-west-3 region. Recently, your manager has tasked you with gathering system memory metrics from every one of these EC2 instances by employing a script.
What solution would effectively enable you to collect this data?
Explanation:
"Use a cron job on the instances that pushes the EC2 RAM statistics as a Custom metric into CloudWatch"
The Amazon CloudWatch Monitoring Scripts for Amazon Elastic Compute Cloud (Amazon EC2) Linux-based instances demonstrate how to produce and consume Amazon CloudWatch custom metrics. These Perl scripts comprise a fully functional example that reports memory, swap, and disk space utilization metrics for a Linux instance. You can set a cron schedule for metrics reported to CloudWatch and report memory utilization to CloudWatch every x minutes.
Incorrect options:
"Extract RAM statistics using the instance metadata" - Instance metadata is data about your instance that you can use to configure or manage the running instance. Instance metadata is divided into categories, for example, hostname, events, and security groups. The instance metadata can only provide the ID of the RAM disk specified at launch time. So this option is incorrect.
"Extract RAM statistics from the standard CloudWatch metrics for EC2 instances" - Amazon EC2 sends metrics to Amazon CloudWatch. By default, each data point covers the 5 minutes that follow the start time of activity for the instance. If you've enabled detailed monitoring, each data point covers the next minute of activity from the start time. The standard CloudWatch metrics don't have any metrics for memory utilization details.
"Extract RAM statistics using X-Ray" - AWS X-Ray helps developers analyze and debug production, distributed applications, such as those built using a microservices architecture. With X-Ray, you can understand how your application and its underlying services are performing to identify and troubleshoot the root cause of performance issues and errors. X-Ray provides an end-to-end view of requests as they travel through your application, and shows a map of your application’s underlying components.