struct describing predicates

predprio.go

type PredPriConfiguration struct {
    NodeAffinity struct {
        Enabled bool // the % of nodes and pods that should match. If not enabled, node affinity is disabled.
        MatchProbability float64 // the % of nodes and pods that should match. Higher # -> smaller performance deficit at scale.
        NumLabels int // the number of labels needed to match.  Higher # -> larger performance deficit at scale.
    }
    ... // others
}

func ReadInPredPriConfiguration() *PredPrioConfiguration {
  return &PredPrioConfiguration{
    NodeAffinity:{
        true,
        .5,
        5,
    },
  }
}

func (*PredPrioConfiguration) mutate() (func(*api.Pod) *api.Pod, func(*api.Node) *api.Node) {
     ppc := ReadInPredPriConfiguration()
     defaultMutatorPod := func(p *api.Pod) api.Pod {
         return p; 
     }
     defaultMutatorNode := func(n *api.Node) api.Node {
         return n; 
     }  
  
  
     // Affinity mutation: 
     affinityMutatorPod := defaultMutator
     affinityMutatorNode := defaultMutator
     if ppc.NodeAffinity.Enabled {
       affinityMutator := func(p *api.Pod) api.Pod {
               // generate a default affinity struct that    
       }
       affinityMutator := func(p *api.Pod) api.Pod {
               // generate a default affinity struct that    
       }
     }
  
  
  return func(p *api.Pod) *api.Pod{
      affinityMutator(p)  
  },func(n *api.Node) *api.Node{
      affinityMutatorNode(n)  
  }
}