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Auto Scaling
API Reference (API Version 2011-01-01)

CreateAutoScalingGroup

Creates an Auto Scaling group with the specified name and attributes.

If you exceed your maximum limit of Auto Scaling groups, which by default is 20 per region, the call fails. For information about viewing and updating this limit, see DescribeAccountLimits.

For more information, see Auto Scaling Groups in the Auto Scaling User Guide.

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

AutoScalingGroupName

The name of the group. This name must be unique within the scope of your AWS account.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 255.

Pattern: [\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*

Required: Yes

AvailabilityZones.member.N

One or more Availability Zones for the group. This parameter is optional if you specify one or more subnets.

Type: Array of strings

Array Members: Minimum number of 1 item.

Length Constraints: Minimum length of 1. Maximum length of 255.

Pattern: [\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*

Required: No

DefaultCooldown

The amount of time, in seconds, after a scaling activity completes before another scaling activity can start. The default is 300.

For more information, see Auto Scaling Cooldowns in the Auto Scaling User Guide.

Type: Integer

Required: No

DesiredCapacity

The number of EC2 instances that should be running in the group. This number must be greater than or equal to the minimum size of the group and less than or equal to the maximum size of the group. If you do not specify a desired capacity, the default is the minimum size of the group.

Type: Integer

Required: No

HealthCheckGracePeriod

The amount of time, in seconds, that Auto Scaling waits before checking the health status of an EC2 instance that has come into service. During this time, any health check failures for the instance are ignored. The default is 0.

This parameter is required if you are adding an ELB health check.

For more information, see Health Checks in the Auto Scaling User Guide.

Type: Integer

Required: No

HealthCheckType

The service to use for the health checks. The valid values are EC2 and ELB.

By default, health checks use Amazon EC2 instance status checks to determine the health of an instance. For more information, see Health Checks in the Auto Scaling User Guide.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 32.

Pattern: [\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*

Required: No

InstanceId

The ID of the instance used to create a launch configuration for the group. Alternatively, specify a launch configuration instead of an EC2 instance.

When you specify an ID of an instance, Auto Scaling creates a new launch configuration and associates it with the group. This launch configuration derives its attributes from the specified instance, with the exception of the block device mapping.

For more information, see Create an Auto Scaling Group Using an EC2 Instance in the Auto Scaling User Guide.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 19.

Pattern: [\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*

Required: No

LaunchConfigurationName

The name of the launch configuration. Alternatively, specify an EC2 instance instead of a launch configuration.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 1600.

Pattern: [\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*

Required: No

LoadBalancerNames.member.N

One or more Classic Load Balancers. To specify an Application Load Balancer, use TargetGroupARNs instead.

For more information, see Using a Load Balancer With an Auto Scaling Group in the Auto Scaling User Guide.

Type: Array of strings

Length Constraints: Minimum length of 1. Maximum length of 255.

Pattern: [\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*

Required: No

MaxSize

The maximum size of the group.

Type: Integer

Required: Yes

MinSize

The minimum size of the group.

Type: Integer

Required: Yes

NewInstancesProtectedFromScaleIn

Indicates whether newly launched instances are protected from termination by Auto Scaling when scaling in.

Type: Boolean

Required: No

PlacementGroup

The name of the placement group into which you'll launch your instances, if any. For more information, see Placement Groups in the Amazon Elastic Compute Cloud User Guide.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 255.

Pattern: [\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*

Required: No

Tags.member.N

One or more tags.

For more information, see Tagging Auto Scaling Groups and Instances in the Auto Scaling User Guide.

Type: Array of Tag objects

Required: No

TargetGroupARNs.member.N

The Amazon Resource Names (ARN) of the target groups.

Type: Array of strings

Length Constraints: Minimum length of 1. Maximum length of 511.

Pattern: [\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*

Required: No

TerminationPolicies.member.N

One or more termination policies used to select the instance to terminate. These policies are executed in the order that they are listed.

For more information, see Controlling Which Instances Auto Scaling Terminates During Scale In in the Auto Scaling User Guide.

Type: Array of strings

Length Constraints: Minimum length of 1. Maximum length of 1600.

Pattern: [\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*

Required: No

VPCZoneIdentifier

A comma-separated list of subnet identifiers for your virtual private cloud (VPC).

If you specify subnets and Availability Zones with this call, ensure that the subnets' Availability Zones match the Availability Zones specified.

For more information, see Launching Auto Scaling Instances in a VPC in the Auto Scaling User Guide.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 2047.

Pattern: [\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*

Required: No

Errors

For information about the errors that are common to all actions, see Common Errors.

AlreadyExists

You already have an Auto Scaling group or launch configuration with this name.

HTTP Status Code: 400

LimitExceeded

You have already reached a limit for your Auto Scaling resources (for example, groups, launch configurations, or lifecycle hooks). For more information, see DescribeAccountLimits.

HTTP Status Code: 400

ResourceContention

You already have a pending update to an Auto Scaling resource (for example, a group, instance, or load balancer).

HTTP Status Code: 500

Example

Sample Request

Copy
https://autoscaling.amazonaws.com/?Action=CreateAutoScalingGroup &AutoScalingGroupName=my-asg &AvailabilityZones.member.1=us-east-1a &AvailabilityZones.member.2=us-east-1b &MinSize=2 &MaxSize=10 &DesiredCapacity=2 &LoadBalancerNames.member.1=my-loadbalancer &HealthCheckType=ELB &HealthCheckGracePeriod=120 &LaunchConfigurationName=my-lc &Version=2011-01-01 &AUTHPARAMS

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: