Amazon EC2 Auto Scaling
User Guide

Creating an Auto Scaling Group Using a Launch Configuration

When you create an Auto Scaling group, you must specify the necessary information to configure the Amazon EC2 instances, the subnets for the instances, and the initial number of instances.


To configure the Amazon EC2 instances, you can specify a launch template, a launch configuration, or an EC2 instance. We recommend that you use a launch template to make sure that you can use the latest features of Amazon EC2. For more information, see Launch Templates.

The following procedure demonstrates how to create an Auto Scaling group using a launch configuration. You cannot modify a launch configuration after it is created, but you can replace the launch configuration for an Auto Scaling group. For more information, see Changing the Launch Configuration for an Auto Scaling Group.


Create a launch configuration. For more information, see Creating a Launch Configuration.

To create an Auto Scaling group using a launch configuration (console)

  1. Open the Amazon EC2 console at

  2. On the navigation bar at the top of the screen, choose the same AWS Region that you used when you created the launch configuration.

  3. On the navigation pane, under Auto Scaling, choose Auto Scaling Groups.

  4. Choose Create Auto Scaling group.

  5. On the Create Auto Scaling Group page, choose Launch Configuration, choose an existing launch configuration, and then choose Next Step.


    If you do not have any launch configurations, you're first prompted to create one before you can continue with the steps to create an Auto Scaling group.

  6. On the Configure Auto Scaling group details page, do the following:

    1. For Group name, enter a name for your Auto Scaling group.

    2. For Group size, enter the initial number of instances for your Auto Scaling group.

    3. For Network, choose a VPC for your Auto Scaling group.

    4. For Subnet, choose one or more subnets in your VPC. Use subnets in multiple Availability Zones for high availability. For more information about high availability with Amazon EC2 Auto Scaling, see Distributing Instances Across Availability Zones.

    5. (Optional) To register your Amazon EC2 instances with a load balancer, choose Advanced Details, choose Receive traffic from one or more load balancers, and choose one or more Classic Load Balancers or target groups.

    6. Choose Next: Configure scaling policies.

  7. On the Configure scaling policies page, choose one of the following options, and then choose Next: Configure Notifications:

    • To manually adjust the size of the Auto Scaling group as needed, choose Keep this group at its initial size. For more information, see Manual Scaling for Amazon EC2 Auto Scaling.

    • To automatically adjust the size of the Auto Scaling group based on criteria that you specify, choose Use scaling policies to adjust the capacity of this group and follow the directions. For more information, see Configure Scaling Policies.

  8. (Optional) To receive notifications, choose Add notification, configure the notification, and then choose Next: Configure Tags.

  9. (Optional) To add tags, choose Edit tags, provide a tag key and value for each tag, and then choose Review.

    Alternatively, you can add tags later on. For more information, see Tagging Auto Scaling Groups and Instances.

  10. On the Review page, choose Create Auto Scaling group.

  11. On the Auto Scaling group creation status page, choose Close.

To create an Auto Scaling group using the command line

You can use one of the following commands: