Is Not Authorized to Perform CloudFormation CreateStack on Resource: Understanding the Error and Finding a Solution
In the world of cloud computing, AWS CloudFormation is a powerful tool that allows users to define and provision cloud resources through code. However, encountering the error “is not authorized to perform cloudformation createstack on resource” can be frustrating, especially when you are trying to deploy your application. This article aims to provide an in-depth understanding of this error and guide you through the steps to resolve it.
The error “is not authorized to perform cloudformation createstack on resource” typically occurs when the user or the IAM role lacks the necessary permissions to create a stack using CloudFormation. To resolve this issue, you need to ensure that the user or IAM role has the appropriate permissions assigned.
Here are some steps to help you troubleshoot and resolve the “is not authorized to perform cloudformation createstack on resource” error:
1. Verify IAM Role Permissions:
First, check the IAM role associated with the user or service account that is trying to create the stack. Ensure that the role has the necessary permissions to perform the CloudFormation CreateStack action. The required permissions include:
– “AWS::CloudFormation::CreateStack” – This permission allows the user to create a stack.
– “AWS::CloudFormation::DescribeStacks” – This permission allows the user to describe the stack, which is necessary for creating and updating stacks.
– “AWS::CloudFormation::UpdateStack” – This permission allows the user to update the stack, which might be required during the deployment process.
To assign these permissions, you can create a custom policy or use an existing managed policy, such as “AWSCloudFormationReadOnlyAccess” or “AWSCloudFormationFullAccess.”
2. Check Trust Relationships:
If the IAM role is associated with an AWS service, such as EC2 or Lambda, ensure that the trust relationship between the service and the IAM role allows the service to assume the role. The trust relationship should include the following statement:
“`
{
“Version”: “2012-10-17”,
“Statement”: [
{
“Effect”: “Allow”,
“Principal”: {
“Service”: “ec2.amazonaws.com”
},
“Action”: “sts:AssumeRole”
}
]
}
“`
3. Verify Resource Permissions:
In some cases, the error might occur due to resource-level permissions. Ensure that the user or IAM role has the necessary permissions to create and manage the resources associated with the stack. For example, if the stack includes an S3 bucket, the user or role should have the “s3:CreateBucket” permission.
4. Use the Correct Role or User:
If you are using an IAM role, make sure that the role is attached to the user or service account that is trying to create the stack. Similarly, if you are using a user account, ensure that the user has the necessary permissions assigned.
5. Check for Conditional Policies:
Conditional policies can restrict access to certain resources based on specific conditions. Review any conditional policies associated with the IAM role or user to ensure that they are not causing the authorization issue.
By following these steps, you should be able to identify and resolve the “is not authorized to perform cloudformation createstack on resource” error. Remember that proper IAM role management is crucial for maintaining security and access control in your AWS environment.
