Often start is implemented using the izumi.distage.model.definition.Lifecycle.fork_ method to spawn a daemon fiber running the service in background.

import izumi.distage.roles.model.RoleService
import izumi.functional.bio.{F, IO2}
import logstage.LogIO2
import logstage.LogIO2.log

final class HelloService[F[+_, +_]: IO2: LogIO2] extends RoleService[F] {
  def start(roleParameters: RawEntrypointParams, freeArgs: Vector[String]): Lifecycle[F[Nothing, _], Unit] = {
    Lifecycle.fork_(helloServer).void
  }

  val helloServer: F[Throwable, Unit] = {
    (for {
      name <- F.syncThrowable { Console.in.readLine() }
      _    <- log.info(s"Hello $name!")
    } yield ()).forever
  }
}