// We include the null character just in case region or failureDomain has a colon
// (We do assume there's no null characters in a region or failureDomain)
// As a nice side-benefit, the null character is not printed by fmt.Print or glog
returnregion+":\x00:"+failureDomain
}
}
// CalculateSpreadPriority spreads pods by minimizing the number of pods belonging to the same service or replication controller. It counts number of pods that run under
// CalculateSpreadPriority spreads pods across hosts and zones, considering pods belonging to the same service or replication controller.
// Services or RCs as the pod being scheduled and tries to minimize the number of conflicts. I.e. pushes scheduler towards a Node where there's a smallest number of
// When a pod is scheduled, it looks for services or RCs that match the pod, then finds existing pods that match those selectors.
// pods which match the same selectors of Services and RCs as current pod.
// It favors nodes that have fewer existing matching pods.
// i.e. it pushes the scheduler towards a node where there's the smallest number of
// pods which match the same service selectors or RC selectors as the pod being scheduled.
// Where zone information is included on the nodes, it favors nodes in zones with fewer existing matching pods.
