82 lines
3.0 KiB
Go
82 lines
3.0 KiB
Go
/*
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Copyright 2019 The Kubernetes 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 nodeaffinity
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import (
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"context"
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"fmt"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/kubernetes/pkg/scheduler/algorithm/predicates"
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"k8s.io/kubernetes/pkg/scheduler/algorithm/priorities"
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"k8s.io/kubernetes/pkg/scheduler/framework/plugins/migration"
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framework "k8s.io/kubernetes/pkg/scheduler/framework/v1alpha1"
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"k8s.io/kubernetes/pkg/scheduler/nodeinfo"
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)
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// NodeAffinity is a plugin that checks if a pod node selector matches the node label.
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type NodeAffinity struct {
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handle framework.FrameworkHandle
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}
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var _ framework.FilterPlugin = &NodeAffinity{}
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var _ framework.ScorePlugin = &NodeAffinity{}
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// Name is the name of the plugin used in the plugin registry and configurations.
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const Name = "NodeAffinity"
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// Name returns name of the plugin. It is used in logs, etc.
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func (pl *NodeAffinity) Name() string {
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return Name
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}
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// Filter invoked at the filter extension point.
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func (pl *NodeAffinity) Filter(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeInfo *nodeinfo.NodeInfo) *framework.Status {
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_, reasons, err := predicates.PodMatchNodeSelector(pod, nil, nodeInfo)
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return migration.PredicateResultToFrameworkStatus(reasons, err)
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}
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// Score invoked at the Score extension point.
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func (pl *NodeAffinity) Score(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeName string) (int64, *framework.Status) {
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nodeInfo, err := pl.handle.SnapshotSharedLister().NodeInfos().Get(nodeName)
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if err != nil {
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return 0, framework.NewStatus(framework.Error, fmt.Sprintf("getting node %q from Snapshot: %v", nodeName, err))
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}
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meta := migration.PriorityMetadata(state)
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s, err := priorities.CalculateNodeAffinityPriorityMap(pod, meta, nodeInfo)
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return s.Score, migration.ErrorToFrameworkStatus(err)
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}
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// NormalizeScore invoked after scoring all nodes.
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func (pl *NodeAffinity) NormalizeScore(ctx context.Context, state *framework.CycleState, pod *v1.Pod, scores framework.NodeScoreList) *framework.Status {
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// Note that CalculateNodeAffinityPriorityReduce doesn't use priority metadata, hence passing nil here.
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err := priorities.CalculateNodeAffinityPriorityReduce(pod, nil, pl.handle.SnapshotSharedLister(), scores)
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return migration.ErrorToFrameworkStatus(err)
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}
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// ScoreExtensions of the Score plugin.
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func (pl *NodeAffinity) ScoreExtensions() framework.ScoreExtensions {
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return pl
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}
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// New initializes a new plugin and returns it.
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func New(_ *runtime.Unknown, h framework.FrameworkHandle) (framework.Plugin, error) {
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return &NodeAffinity{handle: h}, nil
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}
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