AppStream / Client / start_app_block_builder



Starts an app block builder.

An app block builder can only be started when it’s associated with an app block.

Starting an app block builder starts a new instance, which is equivalent to an elastic fleet instance with application builder assistance functionality.

See also: AWS API Documentation

Request Syntax

response = client.start_app_block_builder(

Name (string) –


The name of the app block builder.

Return type:



Response Syntax

    'AppBlockBuilder': {
        'Arn': 'string',
        'Name': 'string',
        'DisplayName': 'string',
        'Description': 'string',
        'Platform': 'WINDOWS_SERVER_2019',
        'InstanceType': 'string',
        'EnableDefaultInternetAccess': True|False,
        'IamRoleArn': 'string',
        'VpcConfig': {
            'SubnetIds': [
            'SecurityGroupIds': [
        'CreatedTime': datetime(2015, 1, 1),
        'AppBlockBuilderErrors': [
                'ErrorMessage': 'string',
                'ErrorTimestamp': datetime(2015, 1, 1)
        'StateChangeReason': {
            'Code': 'INTERNAL_ERROR',
            'Message': 'string'
        'AccessEndpoints': [
                'EndpointType': 'STREAMING',
                'VpceId': 'string'

Response Structure

  • (dict) –

    • AppBlockBuilder (dict) –

      Describes an app block builder.

      • Arn (string) –

        The ARN of the app block builder.

      • Name (string) –

        The name of the app block builder.

      • DisplayName (string) –

        The display name of the app block builder.

      • Description (string) –

        The description of the app block builder.

      • Platform (string) –

        The platform of the app block builder.

        WINDOWS_SERVER_2019 is the only valid value.

      • InstanceType (string) –

        The instance type of the app block builder.

      • EnableDefaultInternetAccess (boolean) –

        Indicates whether default internet access is enabled for the app block builder.

      • IamRoleArn (string) –

        The ARN of the IAM role that is applied to the app block builder.

      • VpcConfig (dict) –

        The VPC configuration for the app block builder.

        • SubnetIds (list) –

          The identifiers of the subnets to which a network interface is attached from the fleet instance or image builder instance. Fleet instances use one or more subnets. Image builder instances use one subnet.

          • (string) –

        • SecurityGroupIds (list) –

          The identifiers of the security groups for the fleet or image builder.

          • (string) –

      • State (string) –

        The state of the app block builder.

      • CreatedTime (datetime) –

        The creation time of the app block builder.

      • AppBlockBuilderErrors (list) –

        The app block builder errors.

        • (dict) –

          Describes a resource error.

          • ErrorCode (string) –

            The error code.

          • ErrorMessage (string) –

            The error message.

          • ErrorTimestamp (datetime) –

            The time the error occurred.

      • StateChangeReason (dict) –

        The state change reason.

        • Code (string) –

          The state change reason code.

        • Message (string) –

          The state change reason message.

      • AccessEndpoints (list) –

        The list of interface VPC endpoint (interface endpoint) objects. Administrators can connect to the app block builder only through the specified endpoints.

        • (dict) –

          Describes an interface VPC endpoint (interface endpoint) that lets you create a private connection between the virtual private cloud (VPC) that you specify and AppStream 2.0. When you specify an interface endpoint for a stack, users of the stack can connect to AppStream 2.0 only through that endpoint. When you specify an interface endpoint for an image builder, administrators can connect to the image builder only through that endpoint.

          • EndpointType (string) –

            The type of interface endpoint.

          • VpceId (string) –

            The identifier (ID) of the VPC in which the interface endpoint is used.