有一个不需要任何外部依赖项的简单替代方案：

defmodule MyApp.Periodically do
  use GenServer

  def start_link(_opts) do
    GenServer.start_link(__MODULE__, %{})
  end

  def init(state) do
    schedule_work() # Schedule work to be performed at some point
    {:ok, state}
  end

  def handle_info(:work, state) do
    # Do the work you desire here
    schedule_work() # Reschedule once more
    {:noreply, state}
  end

  defp schedule_work() do
    Process.send_after(self(), :work, 2 * 60 * 60 * 1000) # In 2 hours
  end
end

现在在您的监督树中：

children = [
  MyApp.Periodically
]

Supervisor.start_link(children, strategy: :one_for_one)