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60 lines
1.9 KiB
Go
60 lines
1.9 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 prebind
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import (
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"context"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/runtime"
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fwk "k8s.io/kube-scheduler/framework"
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"k8s.io/kubernetes/pkg/scheduler/framework"
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)
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// StatelessPreBindExample is an example of a simple plugin that has no state
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// and implements only one hook for prebind.
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type StatelessPreBindExample struct{}
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var _ framework.PreBindPlugin = StatelessPreBindExample{}
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// Name is the name of the plugin used in Registry and configurations.
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const Name = "stateless-prebind-plugin-example"
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// Name returns name of the plugin. It is used in logs, etc.
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func (sr StatelessPreBindExample) Name() string {
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return Name
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}
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func (mc StatelessPreBindExample) PreBindPreFlight(ctx context.Context, state fwk.CycleState, pod *v1.Pod, nodeName string) *fwk.Status {
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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 (sr StatelessPreBindExample) PreBind(ctx context.Context, state fwk.CycleState, pod *v1.Pod, nodeName string) *fwk.Status {
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if pod == nil {
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return fwk.NewStatus(fwk.Error, "pod cannot be nil")
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}
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if pod.Namespace != "foo" {
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return fwk.NewStatus(fwk.Unschedulable, "only pods from 'foo' namespace are allowed")
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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(_ context.Context, _ *runtime.Unknown, _ framework.Handle) (framework.Plugin, error) {
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return &StatelessPreBindExample{}, nil
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}
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