By default the cluster autoscaler takes DaemonSet-managed pods'
resource requests into consideration when computing a node's resource
utilization. Allow toggling its "--ignore-daemonsets-utilization"
command-line flag via a new field in the Cluster
spec—"clusterAutoscaler.ignoreDaemonSetsUtilization." Setting that
field to true causes the autoscaler to ignore such daemon pods'
requests, such that it will more likely judge a node running only
daemon pods as being underutilized and shut down its hosting machine.