mirror of
https://github.com/kubernetes-sigs/descheduler.git
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bcc6c8eb2a
* Descheduling profile * Fake plugin + profile unit testing * Rename Profile config type into DeschedulerProfile To avoid resamblance with profileImpl * First run deschedule, then balance extension points
139 lines
3.5 KiB
Go
139 lines
3.5 KiB
Go
/*
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Copyright 2023 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 plugin
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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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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"sigs.k8s.io/descheduler/pkg/framework"
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"sigs.k8s.io/descheduler/pkg/framework/pluginregistry"
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)
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// +k8s:deepcopy-gen=true
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// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
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// FakePluginArgs holds arguments used to configure FakePlugin plugin.
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type FakePluginArgs struct {
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metav1.TypeMeta `json:",inline"`
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}
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func ValidateFakePluginArgs(obj runtime.Object) error {
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return nil
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}
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func SetDefaults_FakePluginArgs(obj runtime.Object) {}
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var (
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_ framework.EvictorPlugin = &FakePlugin{}
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_ framework.DeschedulePlugin = &FakePlugin{}
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_ framework.BalancePlugin = &FakePlugin{}
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)
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// FakePlugin is a configurable plugin used for testing
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type FakePlugin struct {
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PluginName string
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// ReactionChain is the list of reactors that will be attempted for every
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// request in the order they are tried.
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ReactionChain []Reactor
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args runtime.Object
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handle framework.Handle
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}
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func NewPluginFncFromFake(fp *FakePlugin) pluginregistry.PluginBuilder {
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return func(args runtime.Object, handle framework.Handle) (framework.Plugin, error) {
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fakePluginArgs, ok := args.(*FakePluginArgs)
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if !ok {
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return nil, fmt.Errorf("want args to be of type FakePluginArgs, got %T", args)
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}
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fp.handle = handle
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fp.args = fakePluginArgs
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return fp, nil
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}
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}
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// New builds plugin from its arguments while passing a handle
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func New(args runtime.Object, handle framework.Handle) (framework.Plugin, error) {
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fakePluginArgs, ok := args.(*FakePluginArgs)
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if !ok {
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return nil, fmt.Errorf("want args to be of type FakePluginArgs, got %T", args)
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}
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ev := &FakePlugin{}
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ev.handle = handle
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ev.args = fakePluginArgs
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return ev, nil
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}
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// Name retrieves the plugin name
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func (d *FakePlugin) Name() string {
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return d.PluginName
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}
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func (d *FakePlugin) PreEvictionFilter(pod *v1.Pod) bool {
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return true
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}
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func (d *FakePlugin) Filter(pod *v1.Pod) bool {
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return true
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}
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func (d *FakePlugin) handleAction(action Action) *framework.Status {
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actionCopy := action.DeepCopy()
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for _, reactor := range d.ReactionChain {
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if !reactor.Handles(actionCopy) {
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continue
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}
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handled, err := reactor.React(actionCopy)
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if !handled {
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continue
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}
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return &framework.Status{
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Err: err,
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}
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}
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return &framework.Status{
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Err: fmt.Errorf("unhandled %q action", action.GetExtensionPoint()),
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}
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}
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func (d *FakePlugin) Deschedule(ctx context.Context, nodes []*v1.Node) *framework.Status {
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return d.handleAction(&DescheduleActionImpl{
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ActionImpl: ActionImpl{
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handle: d.handle,
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extensionPoint: string(framework.DescheduleExtensionPoint),
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},
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nodes: nodes,
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})
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}
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func (d *FakePlugin) Balance(ctx context.Context, nodes []*v1.Node) *framework.Status {
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return d.handleAction(&BalanceActionImpl{
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ActionImpl: ActionImpl{
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handle: d.handle,
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extensionPoint: string(framework.BalanceExtensionPoint),
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},
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nodes: nodes,
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})
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}
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