Identity-based policy examples for zonal shift in ARC - Amazon Application Recovery Controller (ARC)
Policy best practicesExample: Console accessExample: API actions

Identity-based policy examples for zonal shift in ARC

By default, users and roles don't have permission to create or modify ARC resources. They also can't perform tasks by using the AWS Management Console, AWS Command Line Interface (AWS CLI), or AWS API. To grant users permission to perform actions on the resources that they need, an IAM administrator can create IAM policies. The administrator can then add the IAM policies to roles, and users can assume the roles.

To learn how to create an IAM identity-based policy by using these example JSON policy documents, see Create IAM policies (console) in the IAM User Guide.

For details about actions and resource types defined by ARC, including the format of the ARNs for each of the resource types, see Actions, resources, and condition keys for Amazon Application Recovery Controller (ARC) in the Service Authorization Reference.

Policy best practices

Identity-based policies determine whether someone can create, access, or delete ARC resources in your account. These actions can incur costs for your AWS account. When you create or edit identity-based policies, follow these guidelines and recommendations:

  • Get started with AWS managed policies and move toward least-privilege permissions – To get started granting permissions to your users and workloads, use the AWS managed policies that grant permissions for many common use cases. They are available in your AWS account. We recommend that you reduce permissions further by defining AWS customer managed policies that are specific to your use cases. For more information, see AWS managed policies or AWS managed policies for job functions in the IAM User Guide.

  • Apply least-privilege permissions – When you set permissions with IAM policies, grant only the permissions required to perform a task. You do this by defining the actions that can be taken on specific resources under specific conditions, also known as least-privilege permissions. For more information about using IAM to apply permissions, see Policies and permissions in IAM in the IAM User Guide.

  • Use conditions in IAM policies to further restrict access – You can add a condition to your policies to limit access to actions and resources. For example, you can write a policy condition to specify that all requests must be sent using SSL. You can also use conditions to grant access to service actions if they are used through a specific AWS service, such as AWS CloudFormation. For more information, see IAM JSON policy elements: Condition in the IAM User Guide.

  • Use IAM Access Analyzer to validate your IAM policies to ensure secure and functional permissions – IAM Access Analyzer validates new and existing policies so that the policies adhere to the IAM policy language (JSON) and IAM best practices. IAM Access Analyzer provides more than 100 policy checks and actionable recommendations to help you author secure and functional policies. For more information, see Validate policies with IAM Access Analyzer in the IAM User Guide.

  • Require multi-factor authentication (MFA) – If you have a scenario that requires IAM users or a root user in your AWS account, turn on MFA for additional security. To require MFA when API operations are called, add MFA conditions to your policies. For more information, see Secure API access with MFA in the IAM User Guide.

For more information about best practices in IAM, see Security best practices in IAM in the IAM User Guide.

Example: Zonal shift console access

To access the Amazon Application Recovery Controller (ARC) console, you must have a minimum set of permissions. These permissions must allow you to list and view details about the ARC resources in your AWS account. If you create an identity-based policy that is more restrictive than the minimum required permissions, the console won't function as intended for entities (users or roles) with that policy.

You don't need to allow minimum console permissions for users that are making calls only to the AWS CLI or the AWS API. Instead, allow access to only the actions that match the API operation that they're trying to perform.

To give users full access to use zonal shift in the AWS Management Console, attach a policy like the following to the user:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                   "arc-zonal-shift:ListManagedResources",
                   "arc-zonal-shift:GetManagedResource",
                   "arc-zonal-shift:ListZonalShifts",
                   "arc-zonal-shift:StartZonalShift",
                   "arc-zonal-shift:UpdateZonalShift",
                   "arc-zonal-shift:CancelZonalShift"
             ],
            "Resource": "*"
        },
        {
            "Effect": "Allow",
            "Action": "ec2:DescribeAvailabilityZones",
            "Resource": "*"
        }
    ]
}

Example: Zonal shift API actions

The zonal shift API temporarily moves traffic away from an Availability Zone to recover an application.

To ensure that a user can use zonal shift API actions, attach a policy that corresponds to the API operations that the user needs to work with, such as the following:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [		
                   "arc-zonal-shift:ListManagedResources",
                   "arc-zonal-shift:GetManagedResource",
                   "arc-zonal-shift:ListZonalShifts",
                   "arc-zonal-shift:StartZonalShift",
                   "arc-zonal-shift:UpdateZonalShift",
                   "arc-zonal-shift:CancelZonalShift"
             ],
            "Resource": "*"
        }
    ]
}