73 lines
2.3 KiB
Go
73 lines
2.3 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 stateful
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import (
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"fmt"
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"k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/klog"
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framework "k8s.io/kubernetes/pkg/scheduler/framework/v1alpha1"
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)
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// MultipointExample is an example plugin that is executed at multiple extension points.
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// This plugin is stateful. It receives arguments at initialization (NewMultipointPlugin)
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// and changes its state when it is executed.
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type MultipointExample struct {
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mpState map[int]string
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numRuns int
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}
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var _ = framework.ReservePlugin(&MultipointExample{})
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var _ = framework.PrebindPlugin(&MultipointExample{})
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// Name is the name of the plug used in Registry and configurations.
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const Name = "multipoint-plugin-example"
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// Name returns name of the plugin. It is used in logs, etc.
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func (mp *MultipointExample) Name() string {
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return Name
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}
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// Reserve is the functions invoked by the framework at "reserve" extension point.
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func (mp *MultipointExample) Reserve(pc *framework.PluginContext, pod *v1.Pod, nodeName string) *framework.Status {
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mp.numRuns++
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return nil
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}
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// Prebind is the functions invoked by the framework at "prebind" extension point.
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func (mp *MultipointExample) Prebind(pc *framework.PluginContext, pod *v1.Pod, nodeName string) *framework.Status {
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mp.numRuns++
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if pod == nil {
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return framework.NewStatus(framework.Error, "pod must not be nil")
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}
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return nil
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}
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// New initializes a new plugin and returns it.
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func New(config *runtime.Unknown, _ framework.FrameworkHandle) (framework.Plugin, error) {
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if config == nil {
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klog.Error("MultipointExample configuration cannot be empty")
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return nil, fmt.Errorf("MultipointExample configuration cannot be empty")
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}
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mp := MultipointExample{
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mpState: make(map[int]string),
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}
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return &mp, nil
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}
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