func MinAvailable(deployment *apps.Deployment) int32 {
	if !IsRollingUpdate(deployment) {
		return int32(0)
	}
	return *(deployment.Spec.Replicas) - MaxUnavailable(*deployment)
}

// MaxSurge returns the maximum surge pods a rolling deployment can take.
func MaxSurge(deployment apps.Deployment) int32 {
	if !IsRollingUpdate(&deployment) {
		return int32(0)
	}
	// Error caught by validation

	}

	// There are old replica sets with pods and the new replica set is not saturated.
	// We need to proportionally scale all replica sets (new and old) in case of a
	// rolling deployment.
	if deploymentutil.IsRollingUpdate(deployment) {
		allRSs := controller.FilterActiveReplicaSets(append(oldRSs, newRS))
		allRSsReplicas := deploymentutil.GetReplicaCountForReplicaSets(allRSs)

		allowedSize := int32(0)