Using tags with Amazon File Cache

You can use tags to control access to Amazon File Cache resources and to implement attribute-based access control (ABAC). Users need to have permission to apply tags to Amazon File Cache resources during creation.

Grant permission to tag resources during creation

Some resource-creating Amazon File Cache API actions enable you to specify tags when you create the resource. You can use resource tags to implement attribute-based access control (ABAC). For more information, see What is ABAC for AWS in the IAM User Guide.

To enable users to tag resources on creation, they must have permissions to use the action that creates the resource, such as fsx:CreateFileCache. If tags are specified in the resource-creating action, Amazon performs additional authorization on the fsx:TagResource action to verify if users have permissions to create tags. Therefore, users must also have explicit permissions to use the fsx:TagResource action.

The following example demonstrates a policy that allows users to create caches and apply tags to them during creation in a specific AWS account.

{
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
         "fsx:CreateFileCache",
         "fsx:TagResource"       
      ],
      "Resource": [
         "arn:aws:fsx:region:account-id:file-cache/*"
      ]
    }
  ]
}

The fsx:TagResource action is only evaluated if tags are applied during the resource-creating action. Therefore, a user that has permissions to create a resource (assuming there are no tagging conditions) does not require permissions to use the fsx:TagResource action if no tags are specified in the request. However, if the user attempts to create a resource with tags, the request fails if the user does not have permissions to use the fsx:TagResource action.

For more information about tagging Amazon FSx resources, see Tag your Amazon File Cache resources. For more information about using tags to control access to FSx resources, see Using tags to control access to your Amazon File Cache resources.

Using tags to control access to your Amazon File Cache resources

To control access to Amazon FSx resources and actions, you can use AWS Identity and Access Management (IAM) policies based on tags. You can provide the control in two ways:

1. Control access to Amazon FSx resources based on the tags on those resources.

2. Control what tags can be passed in an IAM request condition.

For information about how to use tags to control access to AWS resources, see Controlling access using tags in the IAM User Guide. For more information about tagging Amazon File Cache resources at creation, see Grant permission to tag resources during creation. For more information about tagging resources, see Tag your Amazon File Cache resources.

Controlling access based on tags on a resource

To control what actions a user or role can perform on an Amazon FSx resource, you can use tags on the resource. For example, you might want to allow or deny specific API operations on a cache resource based on the key-value pair of the tag on the resource.

Example policy – Create a cache on when providing a specific tag

This policy allows the user to create a cache only when they tag it with a specific tag key value pair, in this example, key=Department, value=Finance.

{
    "Effect": "Allow",
    "Action": [
        "fsx:CreateFileCache",
        "fsx:TagResource"
    ],
    "Resource": "arn:aws:fsx:region:account-id:file-system/*",
    "Condition": {
        "StringEquals": {
            "aws:RequestTag/Department": "Finance"
        }
    }
}

Example policy – Delete caches with specific tags

This policy allows a user to delete only caches that are tagged with Department=Finance. If they create a final backup, then it must be tagged with Department=Finance.

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "fsx:DeleteFileCache"
            ],
            "Resource": "arn:aws:fsx:region:account-id:file-system/*",
            "Condition": {
                "StringEquals": {
                    "aws:ResourceTag/Department": "Finance"
                }
            }
        },
        {
            "Effect": "Allow",
            "Action": [
                "fsx:TagResource"
            ],
            "Resource": "arn:aws:fsx:region:account-id:backup/*",
            "Condition": {
                "StringEquals": {
                    "aws:RequestTag/Department": "Finance"
                }
            }
        }
    ]
}