// Node affinity is a group of node affinity scheduling rules.
message NodeAffinity {
  // If the affinity requirements specified by this field are not met at
  // scheduling time, the pod will not be scheduled onto the node.
  // If the affinity requirements specified by this field cease to be met
  // at some point during pod execution (e.g. due to an update), the system
  // may or may not try to eventually evict the pod from its node.