67 lines
2.1 KiB
Go
67 lines
2.1 KiB
Go
/*
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Copyright 2022 The Karmada Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package clusterlocality
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import (
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"context"
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clusterv1alpha1 "github.com/karmada-io/karmada/pkg/apis/cluster/v1alpha1"
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workv1alpha2 "github.com/karmada-io/karmada/pkg/apis/work/v1alpha2"
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"github.com/karmada-io/karmada/pkg/scheduler/framework"
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)
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const (
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// Name is the name of the plugin used in the plugin registry and configurations.
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Name = "ClusterLocality"
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)
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// ClusterLocality is a score plugin that favors cluster that already have the resource.
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type ClusterLocality struct{}
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var _ framework.ScorePlugin = &ClusterLocality{}
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// New instantiates the ClusterLocality plugin.
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func New() (framework.Plugin, error) {
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return &ClusterLocality{}, nil
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}
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// Name returns the plugin name.
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func (p *ClusterLocality) Name() string {
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return Name
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}
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// Score calculates the score on the candidate cluster.
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// If the cluster already have the resource(exists in .spec.Clusters of ResourceBinding or ClusterResourceBinding),
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// then score is 100, otherwise 0.
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func (p *ClusterLocality) Score(_ context.Context,
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spec *workv1alpha2.ResourceBindingSpec, cluster *clusterv1alpha1.Cluster) (int64, *framework.Result) {
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if len(spec.Clusters) == 0 {
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return framework.MinClusterScore, framework.NewResult(framework.Success)
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}
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if spec.TargetContains(cluster.Name) {
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return framework.MaxClusterScore, framework.NewResult(framework.Success)
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}
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return framework.MinClusterScore, framework.NewResult(framework.Success)
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}
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// ScoreExtensions of the Score plugin.
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func (p *ClusterLocality) ScoreExtensions() framework.ScoreExtensions {
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return nil
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}
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