title: How can I send just one alert with kapacitor if something is down?
body: <p>I have the following stick script </p>
  
  <pre><code>stream
  |from()
      .measurement('mymetric_value')
  |deadman(1.0, 10s)
      .message('service is down!')
      .log('/tmp/alerts.log')
      .email('myemail@company.com')
  </code></pre>
  
  <p>It send an alert every 10 seconds that the service is down. 
  How can I set it to send only one?</p>