AWS CLI v1 entered maintenance mode on August 5, 2026 and will reach end-of-support on July 15, 2027. During maintenance mode, releases are limited to critical bug fixes and security issues. AWS CLI v1 will not receive API updates for new or existing services, or be updated to support new regions. For more information, see the maintenance mode announcement.
We recommend that you migrate to AWS CLI version 2. See the installation instructions and migration guide.
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The DescribeAutoScalingGroups API operation might be throttled when retrieving details for an Auto Scaling group that contains many instances. By default, this operation returns details for all instances in the group. To help prevent throttling, you can set the IncludeInstances parameter to false to exclude instance details from the response.
Amazon EC2 Auto Scaling is designed to automatically launch and terminate EC2 instances based on user-defined scaling policies, scheduled actions, and health checks.
For more information, see the Amazon EC2 Auto Scaling User Guide and the Amazon EC2 Auto Scaling API Reference .