Exam AWS Certified SysOps Administrator - Associate topic 1 question 267 discussion

I found some info on disabling scaling for a specific instance rather than the entire group. This would be important if you needed the instance to finish something it started. # Enable instance scale-in protection for specific instance. aws autoscaling set-instance-protection --instance-ids i-5f2e8a0d --auto-scaling-group-name my-asg --protected-from-scale-in # Disable instance scale-in protection for the specified instance. aws autoscaling set-instance-protection --instance-ids i-5f2e8a0d --auto-scaling-group-name my-asg --no-protected-from-scale-in https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-instance-protection.html

It appears from the link that Suspending Launch scaling process applies to the WHOLE ASG. This isn't what we want ... so D is wrong. Scale-in protection (choice A) prevents an indvidual instance from being lost if the ASG decides to scale in (remove instances). So A is the way to launch an instance in an ASG and then keep it around until it finishes the job, then remove the protection and it can then be terminated by a scale in operation once it is done. https://docs.aws.amazon.com/autoscaling/ec2/userguide/as-enable-disable-scaling-policy.html https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-instance-protection.html

Option A

When a scaling policy is disabled, the Auto Scaling group does not scale out or scale in for the metric alarms that are breached while the scaling policy is disabled. However, any scaling activities still in progress are not stopped. Ref link: https://docs.aws.amazon.com/autoscaling/ec2/userguide/as-enable-disable-scaling-policy.html