Resource-level permissions - Amazon MemoryDB

Resource-level permissions

You can restrict the scope of permissions by specifying resources in an IAM policy. Many AWS CLI API actions support a resource type that varies depending on the behavior of the action. Every IAM policy statement grants permission to an action that's performed on a resource. When the action doesn't act on a named resource, or when you grant permission to perform the action on all resources, the value of the resource in the policy is a wildcard (*). For many API actions, you can restrict the resources that a user can modify by specifying the Amazon Resource Name (ARN) of a resource, or an ARN pattern that matches multiple resources. To restrict permissions by resource, specify the resource by ARN.

MemoryDB Resource ARN Format


For resource-level permissions to be effective, the resource name on the ARN string should be lower case.

  • User – arn:aws:memorydb:us-east-1:123456789012:user/user1

  • ACL – arn:aws:memorydb:us-east-1:123456789012:acl/my-acl

  • Cluster – arn:aws:memorydb:us-east-1:123456789012:cluster/my-cluster

  • Snapshot – arn:aws:memorydb:us-east-1:123456789012:snapshot/my-snapshot

  • Parameter group – arn:aws:memorydb:us-east-1:123456789012:parametergroup/my-parameter-group

  • Subnet group – arn:aws:memorydb:us-east-1:123456789012:subnetgroup/my-subnet-group

Example 1: Allow a user full access to specific MemoryDB resource types

The following policy explicitly allows the specified account-id full access to all resources of type subnet group, security group and cluster.

{ "Sid": "Example1", "Effect": "Allow", "Action": "memorydb:*", "Resource": [ "arn:aws:memorydb:us-east-1:account-id:subnetgroup/*", "arn:aws:memorydb:us-east-1:account-id:securitygroup/*", "arn:aws:memorydb:us-east-1:account-id:cluster/*" ] }

Example 2: Deny a user access to a cluster.

The following example explicitly denies the specified account-id access to a particular cluster.

{ "Sid": "Example2", "Effect": "Deny", "Action": "memorydb:*", "Resource": [ "arn:aws:memorydb:us-east-1:account-id:cluster/name" ] }