(aws-redshift-alpha): Fails to create cluster with logging bucket

What is the problem?

CloudFormation fails to create the Redshift stack, with logging bucket specified as per the documentation.

The error seen on CloudFormation is:

Resource handler returned message: "null" (HandlerErrorcode: InternalFailure)

Reproduction Steps

from aws_cdk import (
    Stack,
    aws_redshift_alpha as redshift_alpha,
    aws_ec2 as ec2,
    aws_s3 as s3,
    aws_iam as iam,
)
from constructs import Construct


class RedshiftStack(Stack):

    def __init__(self, scope: Construct, id: str, **kwargs):
        super().__init__(scope, id, **kwargs)

        self.vpc = ec2.Vpc(
            scope,
            "Vpc",
            subnet_configuration=[ec2.SubnetConfiguration(
                name="private_isolated",
                subnet_type=ec2.SubnetType.PRIVATE_ISOLATED,
            )],
            nat_gateways=None,
            nat_gateway_subnets=None,
            nat_gateway_provider=None,
            )

        self.vpc.add_gateway_endpoint(id="S3",service=ec2.GatewayVpcEndpointAwsService.S3)

        redshift_role = iam.Role(
            self, 'Redshift_Role',
            assumed_by=iam.ServicePrincipal("redshift.amazonaws.com"),
        )

        logging_bucket = s3.Bucket(self, "Redshift-Logs")

        logging_bucket.grant_read_write(redshift_role)

        cluster = redshift_alpha.Cluster(
            self, "Redshift",
            master_user=redshift_alpha.Login(master_username="admin"),
            vpc=self.vpc,
            logging_bucket=logging_bucket,
            roles=[redshift_role],  
            vpc_subnets=ec2.SubnetSelection(
                subnet_type=ec2.SubnetType.PRIVATE_ISOLATED)
        )

What did you expect to happen?

A Redshift cluster created, with logs sent to the specified logging bucket.

What actually happened?

The error seen on CloudFormation is:

Resource handler returned message: "null" (HandlerErrorcode: InternalFailure)

CDK CLI Version

2.17.0

Framework Version

No response

Node.js Version

16.14.0

OS

Mac

Language

Python

Language Version

3.10.2

Other information

Alpha version: aws-cdk.aws-redshift-alpha 2.17.0a0

When the cluster is created, with logging_bucket details omitted, the cluster is successfully created. By default no logs are sent.

[RajivKurien]

Yes, it looks like when logging_bucket is specified, the prefix is also required.

[RajivKurien]

Specifying the logging key prefix fixed the null error:

            logging_bucket=logging_bucket,
            logging_key_prefix="AWSLogs",