AWS Certified SysOps Administrator - Associate: CloudTrail Metric Filter for EC2 Auto Scaling API Calls

Correct Answer: A.

Option A is CORRECT because, in CloudTrail logs, the "eventsource" of the EC2 Auto Scaling API calls is "autoscaling.amazonaws.com"

Users can filter the Auto Scaling logs based on the "eventsource" field.

Option B is incorrect because, for EC2 Auto Scaling API calls, the "eventName" can have lots of possible values such as "CreateLaunchConfiguration" and "DetachLoadBalancers"

Filtering "eventName" to be "autoscaling" is incorrect.

Option C is incorrect because the Auto Scaling API logs may not include the "AutoScalingGroupName" field.

Please check the API log example in the following reference.

Option D is incorrect because this option does not filter the EC2 Auto Scaling API calls from the CloudTrail logs.

References:

https://docs.aws.amazon.com/autoscaling/ec2/userguide/logging-using-cloudtrail.html https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/FilterAndPatternSyntax.html

CloudTrail is an AWS service that records all API calls made in your account, providing detailed event logs that are useful for security analysis, troubleshooting, and compliance auditing. CloudWatch Logs is another AWS service that can be used to store, monitor, and analyze logs generated by various AWS services, including CloudTrail.

To create a metric filter in a CloudWatch Log group that can filter all the EC2 Auto Scaling API calls, including the operations on Auto Scaling groups and Launch Configurations, we need to define a filter pattern that matches the relevant log events.

The filter pattern is a string that uses a special syntax to specify the fields and values that need to be matched in the log events. The filter pattern can include keywords, wildcards, and operators that allow us to create complex matching rules.

In this case, we need to filter all the EC2 Auto Scaling API calls, including the operations on Auto Scaling groups and Launch Configurations. We can do this by using the following filter pattern:

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{ $.eventSource = "autoscaling.amazonaws.com" && ($.eventName = "CreateAutoScalingGroup" || $.eventName = "UpdateAutoScalingGroup" || $.eventName = "DeleteAutoScalingGroup" || $.eventName = "CreateLaunchConfiguration" || $.eventName = "UpdateLaunchConfiguration" || $.eventName = "DeleteLaunchConfiguration") } 

This filter pattern uses the eventSource field to match the EC2 Auto Scaling API calls, and the eventName field to match the relevant operations. The && operator is used to combine the two conditions, and the || operator is used to match any of the specified event names.

Alternatively, we could use option B as the filter pattern, which is to filter the eventName field to be "autoscaling". This filter pattern would match any event name that contains the string "autoscaling", including the relevant operations on Auto Scaling groups and Launch Configurations.

However, option A, C, and D are incorrect as they do not match the specific events required for this scenario. Option A would only match events with the eventSource field set to "autoscaling.amazonaws.com", which may include events that are not relevant to EC2 Auto Scaling. Option C would only match events with the AutoScalingGroupName field set to any value, which does not necessarily indicate an EC2 Auto Scaling API call. Option D would match any event type, including events that are not related to EC2 Auto Scaling.