name : create-extension.rst **To create an extension** The following ``create-extension`` example creates a new extension in AWS AppConfig. :: aws appconfig create-extension \ --region us-west-2 \ --name S3-backup-extension \ --actions PRE_CREATE_HOSTED_CONFIGURATION_VERSION=[{Name=S3backup,Uri=arn:aws:lambda:us-west-2:123456789012:function:s3backupfunction,RoleArn=arn:aws:iam::123456789012:role/appconfigextensionrole}] \ --parameters S3bucket={Required=true} Output:: { "Id": "1A2B3C4D", "Name": "S3-backup-extension", "VersionNumber": 1, "Arn": "arn:aws:appconfig:us-west-2:123456789012:extension/1A2B3C4D/1", "Actions": { "PRE_CREATE_HOSTED_CONFIGURATION_VERSION": [ { "Name": "S3backup", "Uri": "arn:aws:lambda:us-west-2:123456789012:function:s3backupfunction", "RoleArn": "arn:aws:iam::123456789012:role/appconfigextensionrole" } ] }, "Parameters": { "S3bucket": { "Required": true } } } For more information, see `Working with AWS AppConfig extensions <https://docs.aws.amazon.com/appconfig/latest/userguide/working-with-appconfig-extensions.html>`__ in the *AWS AppConfig User Guide*.