Exam AWS Certified Solutions Architect - Professional SAP-C02 topic 1 question 14 discussion

B. Create an AWS Systems Manager document with a script to copy log files to Amazon S3. Create an Auto Scaling lifecycle hook and an Amazon EventBridge rule to detect lifecycle events from the Auto Scaling group. Invoke an AWS Lambda function on the autoscaling:EC2_INSTANCE_TERMINATING transition to call the AWS Systems Manager API SendCommand operation to run the document to copy the log files and send CONTINUE to the Auto Scaling group to terminate the instance. This approach will use the Auto Scaling lifecycle hook to execute the script that copies log files to S3, before the instance is terminated, ensuring that all log files are copied from the terminated instances.

https://aws.amazon.com/blogs/infrastructure-and-automation/run-code-before-terminating-an-ec2-auto-scaling-instance/

Lifecycle hook pauses instance termination. EventBridge detects the lifecycle event. Lambda uses Systems Manager SendCommand to execute on the instance, copying logs to S3. Once logs are copied, it sends CONTINUE to the Auto Scaling group. Fully automated, graceful, and scales properly.

This is most accurate with redundancy as EventBridge can directly invoke SSM Document and you don't need Lambda function.

B using systems manager

Option A - This option might not work: Preventing ASG termination could create further trouble and there is no guarantee the script will run if the instance happens to be unhealthy Option B - This option could work: Running the script from the SSM API guarantees the script will run, using EventBridge to capture the ASG termination event provides a perfect place to hook in the call to SSM which will also pause the termination until the script runs. Then CONTINUE allows the ASG termination to continue. Option C - This option does not work because it does not solve the problem: Terminating instances within the 15 minute window causes log files to be lost. Option D - This option might not work: It does not rely on EventBridge to detect the ASG termination event. It also could create further trouble because no other actions will be performed due to sending ABANDON though nothing is said about other actions in the question

A- Wrong because prevent termination is not needed. C- Wrong because 5-minute frequency creates an overhead or delay . Using user data for the script adds complexity D- Wrong because SNS

B is the right answer due to Auto Scaling lifecycle hook and an Amazon EventBridge rule to detect lifecycle events from the Auto Scaling group. Invoke an AWS Lambda function on the autoscaling:EC2_INSTANCE_TERMINATING transition to call the AWS Systems Manager API SendCommand operation to run the document to copy the log files and send

I think this is B. It could be A as well, but B is better solution because the document with SM can be re-utilized with other instances. Also A would require using a custom image with the script or user data to create the script, so more points of failure.

B. Create an AWS Systems Manager document with a script to copy log files to Amazon S3. Create an Auto Scaling lifecycle hook and an Amazon EventBridge rule to detect lifecycle events from the Auto Scaling group. Invoke an AWS Lambda function on the autoscaling:EC2_INSTANCE_TERMINATING transition to call the AWS Systems Manager API SendCommand operation to run the document to copy the log files and send CONTINUE to the Auto Scaling group to terminate the instance.

B. Create an AWS Systems Manager document with a script to copy log files to Amazon S3. Create an Auto Scaling lifecycle hook and an Amazon EventBridge rule to detect lifecycle events from the Auto Scaling group. Invoke an AWS Lambda function on the autoscaling:EC2_INSTANCE_TERMINATING transition to call the AWS Systems Manager API SendCommand operation to run the document to copy the log files and send CONTINUE to the Auto Scaling group to terminate the instance.

B is the correct answer

both abandon and continue will lead to instance termination, the difference is abandon will prevent from running other lifycycle hooks

I think this is B. It could be A as well, but B is better solution because the document with SM can be re-utilized with other instances. Also A would require using a custom image with the script or user data to create the script, so more points of failure.

d is wrong, shouldn't be "ABANDON"

it's a B

B. Smart solution :)