Actions, resources, and condition keys for Amazon Message Delivery Service
Amazon Message Delivery Service (service prefix: ec2messages) provides the following service-specific resources, actions, and condition context keys for use in IAM permission policies.
References:
-
Learn how to configure this service.
-
View a list of the API operations available for this service.
-
Learn how to secure this service and its resources by using IAM permission policies.
Topics
Actions defined by Amazon Message Delivery Service
You can specify the following actions in the Action element of an IAM policy statement. Use policies to grant permissions to perform an operation in Amazon. When you use an action in a policy, you usually allow or deny access to the API operation or CLI command with the same name. However, in some cases, a single action controls access to more than one operation. Alternatively, some operations require several different actions.
The Resource types column of the Actions table indicates whether each action supports resource-level permissions. If there is no value for this column, you must specify all resources ("*") to which the policy applies in the Resource element of your policy statement. If the column includes a resource type, then you can specify an ARN of that type in a statement with that action. If the action has one or more required resources, the caller must have permission to use the action with those resources. Required resources are indicated in the table with an asterisk (*). If you limit resource access with the Resource element in an IAM policy, you must include an ARN or pattern for each required resource type. Some actions support multiple resource types. If the resource type is optional (not indicated as required), then you can choose to use one of the optional resource types.
The Condition keys column of the Actions table includes keys that you can specify in a policy statement's Condition element. For more information on the condition keys that are associated with resources for the service, see the Condition keys column of the Resource types table.
Note
Resource condition keys are listed in the Resource types table. You can find a link to the resource type that applies to an action in the Resource types (*required) column of the Actions table. The resource type in the Resource types table includes the Condition keys column, which are the resource condition keys that apply to an action in the Actions table.
For details about the columns in the following table, see Actions table.
| Actions | Description | Access level | Resource types (*required) | Condition keys | Dependent actions |
|---|---|---|---|---|---|
| AcknowledgeMessage | Grants permission to acknowledge a message, ensuring it will not be delivered again | Write | |||
| DeleteMessage | Grants permission to delete a message | Write | |||
| FailMessage | Grants permission to fail a message, signifying the message could not be processed successfully, ensuring it cannot be replied to or delivered again | Write | |||
| GetEndpoint | Grants permission to route traffic to the correct endpoint based on the given destination for the messages | Read | |||
| GetMessages | Grants permission to deliver messages to clients/instances using long polling | Read | |||
| SendReply | Grants permission to send replies from clients/instances to upstream service | Write |
Resource types defined by Amazon Message Delivery Service
Amazon Message Delivery Service does not support specifying a resource ARN in the Resource element of an IAM policy statement. To allow access to Amazon Message Delivery Service, specify "Resource": "*" in your policy.
Condition keys for Amazon Message Delivery Service
Amazon Message Delivery Service defines the following condition keys that can be used in the Condition element of an IAM policy. You can use these keys to further refine the conditions under which the policy statement applies. For details about the columns in the following table, see Condition keys table.
To view the global condition keys that are available to all services, see Available global condition keys.
| Condition keys | Description | Type |
|---|---|---|
| ec2:SourceInstanceARN | Filters access by the ARN of the instance from which the request originated | ARN |
| ssm:SourceInstanceARN | Filters access by verifying the Amazon Resource Name (ARN) of the Amazon Systems Manager's managed instance from which the request is made. This key is not present when the request comes from the managed instance authenticated with an IAM role associated with EC2 instance profile | ARN |