volcano.sh/volcano@v1.9.0/pkg/scheduler/plugins/conformance/conformance.go (about)

     1  /*
     2  Copyright 2018 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package conformance
    18  
    19  import (
    20  	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    21  	"k8s.io/kubernetes/pkg/apis/scheduling"
    22  
    23  	"volcano.sh/volcano/pkg/scheduler/api"
    24  	"volcano.sh/volcano/pkg/scheduler/framework"
    25  	"volcano.sh/volcano/pkg/scheduler/plugins/util"
    26  )
    27  
    28  // PluginName indicates name of volcano scheduler plugin.
    29  const PluginName = "conformance"
    30  
    31  type conformancePlugin struct {
    32  	// Arguments given for the plugin
    33  	pluginArguments framework.Arguments
    34  }
    35  
    36  // New return conformance plugin
    37  func New(arguments framework.Arguments) framework.Plugin {
    38  	return &conformancePlugin{pluginArguments: arguments}
    39  }
    40  
    41  func (pp *conformancePlugin) Name() string {
    42  	return PluginName
    43  }
    44  
    45  func (pp *conformancePlugin) OnSessionOpen(ssn *framework.Session) {
    46  	evictableFn := func(evictor *api.TaskInfo, evictees []*api.TaskInfo) ([]*api.TaskInfo, int) {
    47  		var victims []*api.TaskInfo
    48  
    49  		for _, evictee := range evictees {
    50  			className := evictee.Pod.Spec.PriorityClassName
    51  			// Skip critical pod.
    52  			if className == scheduling.SystemClusterCritical ||
    53  				className == scheduling.SystemNodeCritical ||
    54  				evictee.Namespace == v1.NamespaceSystem {
    55  				continue
    56  			}
    57  
    58  			victims = append(victims, evictee)
    59  		}
    60  
    61  		return victims, util.Permit
    62  	}
    63  
    64  	ssn.AddPreemptableFn(pp.Name(), evictableFn)
    65  	ssn.AddReclaimableFn(pp.Name(), evictableFn)
    66  }
    67  
    68  func (pp *conformancePlugin) OnSessionClose(ssn *framework.Session) {}