dnsName

The `dnsName` is the name that you use in the applications of client tasks to connect to this service. The name must be a valid DNS name but doesn't need to be fully-qualified. The name can include up to 127 characters. The name can include lowercase letters, numbers, underscores (_), hyphens (-), and periods (.). The name can't start with a hyphen. If this parameter isn't specified, the default value of `discoveryName.namespace` is used. If the `discoveryName` isn't specified, the port mapping name from the task definition is used in `portName.namespace`. To avoid changing your applications in client Amazon ECS services, set this to the same name that the client application uses by default. For example, a few common names are `database`, `db`, or the lowercase name of a database, such as `mysql` or `redis`. For more information, see Service Connect in the Amazon Elastic Container Service Developer Guide.