title: terminationGracePeriodSeconds not
body: <p>I have a .NET Core console application running in a docker container that I am deploying through Kubernetes.
  When I update the deployment image, I would like to keep the existing pod around for a while, without accepting new connections, but to keep existing connections alive for a period to allow existing users to finish. </p>
  
  <p>Looking at the Kubernetes docs, I thought that termination grace period seconds was the property to add, but it doesn't seem to be working. As soon as I change the image listed in the deployment then the existing pod is dropped - the grace period is not applied. </p>
  
  <p>Does anyone have any ideas as to what I'm doing wrong in this instance? I can't see anything in the docs. </p>
  
  <p>Bit from my .yml file below:</p>
  
  <pre><code>spec: 
     terminationGracePeriodSeconds: 60
     containers:
         - name: myApplication
  </code></pre>