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Troubleshoot INCOMPATIBLE_CREATE issues due to missing instance profile permissions during Amazon RDS Custom instance creation
- RDS Custom instances require an instance profile for a built-in automation to evaluate the instance profile permissions, which can be impacted by IAM policies, resource-based policies, VPC endpoint policies, and SCPs.
- If any of these permissions have explicit deny policies or incorrect permissions, an instance may go into an INCOMPATIBLE_CREATE state.
- To troubleshoot this error, you can review the Amazon RDS events, use it to identify resource-specific permission or SCP permissions blocking instance creation.
- This post provides information to identify the causes of the INCOMPATIBLE_CREATE state of RDS Custom instances due to incorrect instance profile permissions.
- Furthermore, possible reasons for this state include missing required IAM policy permissions, IAM permissions boundary, resource-based policies, VPC endpoint policy, and SCPs.
- This blog post also demonstrates a scenario where RDS Custom for SQL Server instance creation fails due to resource-based policy in AWS KMS.
- To prevent or fix this error, grant all the required permissions to your IAM principal and make sure that your IAM instance profile role has all the necessary permissions.
- You can avoid ongoing charges by deleting the relevant resources such as IAM roles, AWS KMS keys, and RDS Custom SQL Server instances.
- The authors of this post are cloud support professionals working with AWS for several years and subject matter experts in Amazon RDS.
- They provide technical assistance to customers on database migration, RDS infrastructure, monitoring, and security related scenarios.
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