如何直接移除ASG中Standby状态的故障EC2实例而不转入InService

Absolutely! You can terminate an EC2 instance in the Standby state of your Auto Scaling Group (ASG) without first moving it back to the InService state. This skips the intermediate step entirely—here's how to do it via both the AWS Management Console and CLI:

Using the AWS Management Console #

• Open the EC2 Console and navigate to the Auto Scaling Groups section.
• Select your target ASG, then switch to the Instances tab.
• Locate the instance marked with a Standby state, check the box next to it.
• Click Actions > Instance management > Terminate instance.
• Confirm the action in the popup window. The ASG will immediately initiate termination of the standby instance, no InService transition required.

Using the AWS CLI #

Run the following command, replacing <your-instance-id> with the ID of your standby instance:

aws autoscaling terminate-instance-in-auto-scaling-group --instance-id <your-instance-id> --no-should-decrement-desired-capacity

• The --no-should-decrement-desired-capacity flag tells the ASG to maintain your current desired capacity (it will launch a new instance to replace the terminated one). If you want to reduce the desired capacity instead, omit this flag.

Key Notes #

• After termination, the instance will be removed from your ASG's instance list and its status will update to Terminated.
• This operation is fully supported by AWS and aligns with ASG lifecycle management best practices for handling faulty standby instances.

内容的提问来源于stack exchange，提问作者Sumit Murari