How Amazon WorkLink works with IAM - Amazon WorkLink

How Amazon WorkLink works with IAM

Before you use AWS Identity and Access Management (IAM) to manage access to Amazon WorkLink, you should understand what IAM features are available to use with Amazon WorkLink. To get a high-level view of how Amazon WorkLink and other AWS services work with IAM, see AWS Services That Work with IAM in the IAM User Guide.

Amazon WorkLink identity-based policies

With IAM identity-based policies, you can specify allowed or denied actions and resources, and also the conditions under which actions are allowed or denied. Amazon WorkLink supports specific actions, resources, and condition keys. For more information about all of the elements that you use in a JSON policy, see IAM JSON Policy Elements Reference in the IAM User Guide.

Actions

Administrators can use AWS JSON policies to specify who has access to what. That is, which principal can perform actions on what resources, and under what conditions.

The Action element of a JSON policy describes the actions that you can use to allow or deny access in a policy. Policy actions usually have the same name as the associated AWS API operation. There are some exceptions, such as permission-only actions that don't have a matching API operation. There are also some operations that require multiple actions in a policy. These additional actions are called dependent actions.

Include actions in a policy to grant permissions to perform the associated operation.

Policy actions in Amazon WorkLink use the following prefix before the action: worklink:. For example, to grant someone permission to run an Amazon EC2 instance with the Amazon EC2 RunInstances API operation, you include the ec2:RunInstances action in their policy. Policy statements must include either an Action or NotAction element. Amazon WorkLink defines its own set of actions that describe tasks that you can perform with this service.

To specify multiple actions in a single statement, separate them with commas as follows:

"Action": [ "ec2:action1", "ec2:action2"

You can specify multiple actions using wildcards (*). For example, to specify all actions that begin with the word Describe, include the following action:

"Action": "ec2:Describe*"

To see a list of Amazon WorkLink actions, see Actions Defined by Amazon WorkLink in the IAM User Guide.

Resources

Administrators can use AWS JSON policies to specify who has access to what. That is, which principal can perform actions on what resources, and under what conditions.

The Resource JSON policy element specifies the object or objects to which the action applies. Statements must include either a Resource or a NotResource element. As a best practice, specify a resource using its Amazon Resource Name (ARN). You can do this for actions that support a specific resource type, known as resource-level permissions.

For actions that don't support resource-level permissions, such as listing operations, use a wildcard (*) to indicate that the statement applies to all resources.

"Resource": "*"

The Amazon EC2 instance resource has the following ARN:

arn:${Partition}:ec2:${Region}:${Account}:instance/${InstanceId}

For more information about the format of ARNs, see Amazon Resource Names (ARNs) and AWS Service Namespaces.

For example, to specify the i-1234567890abcdef0 instance in your statement, use the following ARN:

"Resource": "arn:aws:ec2:us-east-1:123456789012:instance/i-1234567890abcdef0"

To specify all instances that belong to a specific account, use the wildcard (*):

"Resource": "arn:aws:ec2:us-east-1:123456789012:instance/*"

Some Amazon WorkLink actions, such as those for creating resources, cannot be performed on a specific resource. In those cases, you must use the wildcard (*).

"Resource": "*"

Many Amazon EC2 API actions involve multiple resources. For example, AttachVolume attaches an Amazon EBS volume to an instance, so an IAM user must have permissions to use the volume and the instance. To specify multiple resources in a single statement, separate the ARNs with commas.

"Resource": [ "resource1", "resource2"

Amazon WorkLink has one resource (fleet), and policies can restrict at the fleet level. To see a list of Amazon WorkLink resource types and their ARNs, see Resources Defined by Amazon WorkLink in the IAM User Guide. To learn with which actions you can specify the ARN of each resource, see Actions Defined by Amazon WorkLink.

Condition keys

Amazon WorkLink does not support any global condition keys.

Examples

To view examples of Amazon WorkLink identity-based policies, see Amazon WorkLink identity-based policy examples.

Amazon WorkLink resource-based policies

Amazon WorkLink does not support resource-based policies.

Access control lists (ACLs)

Amazon WorkLink does not support Access Control Lists (ACLs).

Authorization based on Amazon WorkLink tags

You can attach tags to Amazon WorkLink resources or pass tags in a request to Amazon WorkLink. To control access based on tags, you provide tag information in the condition element of a policy using the worklink:ResourceTag/key-name, aws:RequestTag/key-name, or aws:TagKeys condition keys. For more information about tagging Amazon WorkLink resources, see Create a fleet.

Amazon WorkLink IAM roles

An IAM role is an entity within your AWS account that has specific permissions.

Using temporary credentials with Amazon WorkLink

You can use temporary credentials to sign in with federation, assume an IAM role, or to assume a cross-account role. You obtain temporary security credentials by calling AWS STS API operations such as AssumeRole or GetFederationToken.

Amazon WorkLink supports using temporary credentials.

Service-linked roles

Service-linked roles allow AWS services to access resources in other services to complete an action on your behalf. Service-linked roles appear in your IAM account and are owned by the service. An IAM administrator can view but not edit the permissions for service-linked roles.

Amazon WorkLink supports service-linked roles. For details about creating or managing Amazon WorkLink service-linked roles, see Using service-linked roles for Amazon WorkLink.

Service roles

This feature allows a service to assume a service role on your behalf. This role allows the service to access resources in other services to complete an action on your behalf. Service roles appear in your IAM account and are owned by the account. This means that an IAM administrator can change the permissions for this role. However, doing so might break the functionality of the service.

Amazon WorkLink supports service roles.