Unable to successfully create Zero-ETL integration between Aurora PostgreSQL and Provisioned Redshift

There are several reasons why your Zero-ETL integration might be stuck in the "Creating" state or fail to create. Here are some key areas to check and troubleshoot:

1. Aurora PostgreSQL version: Ensure your Aurora PostgreSQL cluster is running a supported version for Zero-ETL integration. Check the "Configuration" tab for the cluster and verify the "Engine version" is compatible.

2. DB cluster parameter settings: Verify that you have correctly configured the binlog parameter settings for your Aurora PostgreSQL cluster. Incorrect or missing binlog parameters can cause the integration creation to fail.

3. Redshift configuration: Make sure your Redshift cluster has case sensitivity enabled. For provisioned clusters, ensure it's encrypted if that's a requirement in your setup.

4. Permissions: Check that you've set up the correct authorized principal (IAM user or role) that has permission to create Zero-ETL integrations. Also, ensure you've added the Aurora PostgreSQL cluster as an authorized integration source to the Redshift namespace.

5. Network connectivity: Verify that there are no network issues between your Aurora PostgreSQL cluster and the Redshift cluster.

6. Resource limits: Ensure you haven't exceeded any limits, such as the number of tables (100K) or schemas (4950) in the destination data warehouse.

If the integration is stuck in the "Creating" state for an extended period, you may want to try deleting the integration and creating it again.

For the failed integration with the generic error message, it's advisable to contact AWS Support as suggested in the error message. They can provide more detailed information about the specific cause of the failure by examining the logs and backend systems.

To better debug this type of issue in the future:

1. Double-check all prerequisites and configurations before creating the integration.
2. Monitor the AWS CloudTrail logs for any relevant events or error messages during the integration creation process.
3. Check the Amazon Redshift and Aurora PostgreSQL logs for any error messages or warnings related to the integration.

If the problem persists after verifying all these points, reaching out to AWS Support would be the best course of action. They can provide more in-depth troubleshooting and potentially identify any underlying issues that may not be visible from the console.

Sources
Troubleshooting zero-ETL integrations - Amazon Redshift
Troubleshooting Aurora zero-ETL integrations with Amazon Redshift - Amazon Aurora