istio.io/istio@v0.0.0-20240520182934-d79c90f27776/pkg/test/loadbalancersim/loadbalancer/priority.go (about)

     1  //  Copyright Istio Authors
     2  //
     3  //  Licensed under the Apache License, Version 2.0 (the "License");
     4  //  you may not use this file except in compliance with the License.
     5  //  You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  //  Unless required by applicable law or agreed to in writing, software
    10  //  distributed under the License is distributed on an "AS IS" BASIS,
    11  //  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  //  See the License for the specific language governing permissions and
    13  //  limitations under the License.
    14  
    15  package loadbalancer
    16  
    17  import (
    18  	mesh2 "istio.io/istio/pkg/test/loadbalancersim/mesh"
    19  )
    20  
    21  type PrioritySelector func(src *mesh2.Client, dest *mesh2.Node) uint32
    22  
    23  func LocalityPrioritySelector(src *mesh2.Client, dest *mesh2.Node) uint32 {
    24  	priority := uint32(2)
    25  	if src.Locality().Region == dest.Locality().Region {
    26  		priority = 1
    27  		if src.Locality().Zone == dest.Locality().Zone {
    28  			priority = 0
    29  		}
    30  	}
    31  	return priority
    32  }