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64 lines
2.3 KiB
Go
64 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 nodevolumelimits
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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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"k8s.io/kubernetes/pkg/scheduler/algorithm/predicates"
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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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// EBSLimits is a plugin that checks node volume limits.
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type EBSLimits struct {
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predicate predicates.FitPredicate
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}
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var _ framework.FilterPlugin = &EBSLimits{}
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// EBSName is the name of the plugin used in the plugin registry and configurations.
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const EBSName = "EBSLimits"
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// Name returns name of the plugin. It is used in logs, etc.
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func (pl *EBSLimits) Name() string {
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return EBSName
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}
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// Filter invoked at the filter extension point.
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func (pl *EBSLimits) Filter(ctx context.Context, _ *framework.CycleState, pod *v1.Pod, nodeInfo *nodeinfo.NodeInfo) *framework.Status {
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// metadata is not needed
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_, reasons, err := pl.predicate(pod, nil, nodeInfo)
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return migration.PredicateResultToFrameworkStatus(reasons, err)
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}
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// NewEBS returns function that initializes a new plugin and returns it.
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func NewEBS(_ *runtime.Unknown, handle framework.FrameworkHandle) (framework.Plugin, error) {
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informerFactory := handle.SharedInformerFactory()
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csiNodeLister := informerFactory.Storage().V1beta1().CSINodes().Lister()
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pvLister := informerFactory.Core().V1().PersistentVolumes().Lister()
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pvcLister := informerFactory.Core().V1().PersistentVolumeClaims().Lister()
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scLister := informerFactory.Storage().V1().StorageClasses().Lister()
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return &EBSLimits{
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predicate: predicates.NewMaxPDVolumeCountPredicate(predicates.EBSVolumeFilterType, csiNodeLister, scLister, pvLister, pvcLister),
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}, nil
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}
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