Describes an instance's Amazon EBS volumes.
You must specify at least one of the parameters. Required Permissions: To use this action, an IAM user must have a Show,
Deploy, or Manage permissions level for the stack, or an attached policy that explicitly grants permissions. For more information on user permissions, see Managing User Permissions (http://docs.aws.amazon.com/opsworks/latest/userguide/opsworks-security-users.html).