DescribeLaunchConfigurations - Amazon EC2 Auto Scaling


Gets information about the launch configurations in the account and Region.

Request Parameters

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


The launch configuration names. If you omit this property, all launch configurations are described.

Array Members: Maximum number of 50 items.

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


The maximum number of items to return with this call. The default value is 50 and the maximum value is 100.

Type: Integer

Required: No


The token for the next set of items to return. (You received this token from a previous call.)

Type: String

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

Required: No

Response Elements

The following elements are returned by the service.


The launch configurations.

Type: Array of LaunchConfiguration objects


A string that indicates that the response contains more items than can be returned in a single response. To receive additional items, specify this string for the NextToken value when requesting the next set of items. This value is null when there are no more items to return.

Type: String

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


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


The NextToken value is not valid.

HTTP Status Code: 400


You already have a pending update to an Amazon EC2 Auto Scaling resource (for example, an Auto Scaling group, instance, or load balancer).

HTTP Status Code: 500



This example illustrates one usage of DescribeLaunchConfigurations.

Sample Request &LaunchConfigurationNames.member.1=my-lc &Version=2011-01-01 &AUTHPARAMS

Sample Response

<DescribeLaunchConfigurationsResponse xmlns=""> <DescribeLaunchConfigurationsResult> <LaunchConfigurations> <member> <KernelId /> <EbsOptimized>false</EbsOptimized> <RamdiskId /> <UserData /> <ImageId>ami-0abcdef1234567890</ImageId> <BlockDeviceMappings /> <ClassicLinkVPCSecurityGroups /> <InstanceType>t2.micro</InstanceType> <KeyName /> <LaunchConfigurationARN>arn:aws:autoscaling:us-east-1:123456789012:launchConfiguration:12345678-1234-1234-1234-123456789012:launchConfigurationName/my-lc</LaunchConfigurationARN> <LaunchConfigurationName>my-lc</LaunchConfigurationName> <CreatedTime>2022-01-21T23:04:42.200Z</CreatedTime> <SecurityGroups> <member>sg-1a2b3c4d</member> </SecurityGroups> <InstanceMonitoring> <Enabled>true</Enabled> </InstanceMonitoring> </member> </LaunchConfigurations> </DescribeLaunchConfigurationsResult> <ResponseMetadata> <RequestId>7c6e177f-f082-11e1-ac58-3714bEXAMPLE</RequestId> </ResponseMetadata> </DescribeLaunchConfigurationsResponse>

See Also

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