mirror of
https://github.com/kubernetes-sigs/descheduler.git
synced 2026-01-26 21:31:18 +01:00
479 lines
13 KiB
Go
479 lines
13 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/pluginregistry"
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frameworktypes "sigs.k8s.io/descheduler/pkg/framework/types"
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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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_ frameworktypes.EvictorPlugin = &FakePlugin{}
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_ frameworktypes.DeschedulePlugin = &FakePlugin{}
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_ frameworktypes.BalancePlugin = &FakePlugin{}
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_ frameworktypes.EvictorPlugin = &FakeFilterPlugin{}
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_ frameworktypes.DeschedulePlugin = &FakeDeschedulePlugin{}
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_ frameworktypes.BalancePlugin = &FakeBalancePlugin{}
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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 frameworktypes.Handle
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}
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func NewPluginFncFromFake(fp *FakePlugin) pluginregistry.PluginBuilder {
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return func(ctx context.Context, args runtime.Object, handle frameworktypes.Handle) (frameworktypes.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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func NewPluginFncFromFakeWithReactor(fp *FakePlugin, callback func(ActionImpl)) pluginregistry.PluginBuilder {
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return func(ctx context.Context, args runtime.Object, handle frameworktypes.Handle) (frameworktypes.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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callback(ActionImpl{handle: fp.handle})
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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(ctx context.Context, args runtime.Object, handle frameworktypes.Handle) (frameworktypes.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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func (c *FakePlugin) AddReactor(extensionPoint string, reaction ReactionFunc) {
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c.ReactionChain = append(c.ReactionChain, &SimpleReactor{ExtensionPoint: extensionPoint, Reaction: reaction})
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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) *frameworktypes.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 &frameworktypes.Status{
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Err: err,
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}
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}
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return &frameworktypes.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) *frameworktypes.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(frameworktypes.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) *frameworktypes.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(frameworktypes.BalanceExtensionPoint),
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},
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nodes: nodes,
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})
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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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// FakeDeschedulePluginArgs holds arguments used to configure FakeDeschedulePlugin plugin.
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type FakeDeschedulePluginArgs struct {
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metav1.TypeMeta `json:",inline"`
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}
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// FakeDeschedulePlugin is a configurable plugin used for testing
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type FakeDeschedulePlugin 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 frameworktypes.Handle
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}
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func NewFakeDeschedulePluginFncFromFake(fp *FakeDeschedulePlugin) pluginregistry.PluginBuilder {
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return func(ctx context.Context, args runtime.Object, handle frameworktypes.Handle) (frameworktypes.Plugin, error) {
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fakePluginArgs, ok := args.(*FakeDeschedulePluginArgs)
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if !ok {
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return nil, fmt.Errorf("want args to be of type FakeDeschedulePluginArgs, 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 NewFakeDeschedule(args runtime.Object, handle frameworktypes.Handle) (frameworktypes.Plugin, error) {
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fakePluginArgs, ok := args.(*FakeDeschedulePluginArgs)
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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 := &FakeDeschedulePlugin{}
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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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func (c *FakeDeschedulePlugin) AddReactor(extensionPoint string, reaction ReactionFunc) {
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c.ReactionChain = append(c.ReactionChain, &SimpleReactor{ExtensionPoint: extensionPoint, Reaction: reaction})
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}
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// Name retrieves the plugin name
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func (d *FakeDeschedulePlugin) Name() string {
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return d.PluginName
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}
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func (d *FakeDeschedulePlugin) Deschedule(ctx context.Context, nodes []*v1.Node) *frameworktypes.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(frameworktypes.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 *FakeDeschedulePlugin) handleAction(action Action) *frameworktypes.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 &frameworktypes.Status{
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Err: err,
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}
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}
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return &frameworktypes.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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// +k8s:deepcopy-gen=true
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// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
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// FakeBalancePluginArgs holds arguments used to configure FakeBalancePlugin plugin.
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type FakeBalancePluginArgs struct {
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metav1.TypeMeta `json:",inline"`
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}
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// FakeBalancePlugin is a configurable plugin used for testing
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type FakeBalancePlugin 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 frameworktypes.Handle
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}
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func NewFakeBalancePluginFncFromFake(fp *FakeBalancePlugin) pluginregistry.PluginBuilder {
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return func(ctx context.Context, args runtime.Object, handle frameworktypes.Handle) (frameworktypes.Plugin, error) {
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fakePluginArgs, ok := args.(*FakeBalancePluginArgs)
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if !ok {
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return nil, fmt.Errorf("want args to be of type FakeBalancePluginArgs, 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 NewFakeBalance(args runtime.Object, handle frameworktypes.Handle) (frameworktypes.Plugin, error) {
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fakePluginArgs, ok := args.(*FakeBalancePluginArgs)
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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 := &FakeBalancePlugin{}
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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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func (c *FakeBalancePlugin) AddReactor(extensionPoint string, reaction ReactionFunc) {
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c.ReactionChain = append(c.ReactionChain, &SimpleReactor{ExtensionPoint: extensionPoint, Reaction: reaction})
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}
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// Name retrieves the plugin name
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func (d *FakeBalancePlugin) Name() string {
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return d.PluginName
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}
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func (d *FakeBalancePlugin) Balance(ctx context.Context, nodes []*v1.Node) *frameworktypes.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(frameworktypes.BalanceExtensionPoint),
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},
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nodes: nodes,
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})
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}
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func (d *FakeBalancePlugin) handleAction(action Action) *frameworktypes.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 &frameworktypes.Status{
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Err: err,
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}
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}
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return &frameworktypes.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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// +k8s:deepcopy-gen=true
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// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
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// FakeFilterPluginArgs holds arguments used to configure FakeFilterPlugin plugin.
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type FakeFilterPluginArgs struct {
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metav1.TypeMeta `json:",inline"`
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}
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// FakeFilterPlugin is a configurable plugin used for testing
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type FakeFilterPlugin 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 frameworktypes.Handle
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}
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func NewFakeFilterPluginFncFromFake(fp *FakeFilterPlugin) pluginregistry.PluginBuilder {
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return func(ctx context.Context, args runtime.Object, handle frameworktypes.Handle) (frameworktypes.Plugin, error) {
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fakePluginArgs, ok := args.(*FakeFilterPluginArgs)
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if !ok {
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return nil, fmt.Errorf("want args to be of type FakeFilterPluginArgs, 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 NewFakeFilter(args runtime.Object, handle frameworktypes.Handle) (frameworktypes.Plugin, error) {
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fakePluginArgs, ok := args.(*FakeFilterPluginArgs)
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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 := &FakeFilterPlugin{}
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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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func (c *FakeFilterPlugin) AddReactor(extensionPoint string, reaction ReactionFunc) {
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c.ReactionChain = append(c.ReactionChain, &SimpleReactor{ExtensionPoint: extensionPoint, Reaction: reaction})
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}
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// Name retrieves the plugin name
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func (d *FakeFilterPlugin) Name() string {
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return d.PluginName
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}
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func (d *FakeFilterPlugin) Filter(pod *v1.Pod) bool {
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return d.handleBoolAction(&FilterActionImpl{
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ActionImpl: ActionImpl{
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handle: d.handle,
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extensionPoint: string(frameworktypes.FilterExtensionPoint),
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},
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})
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}
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func (d *FakeFilterPlugin) PreEvictionFilter(pod *v1.Pod) bool {
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return d.handleBoolAction(&PreEvictionFilterActionImpl{
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ActionImpl: ActionImpl{
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handle: d.handle,
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extensionPoint: string(frameworktypes.PreEvictionFilterExtensionPoint),
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},
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})
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}
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func (d *FakeFilterPlugin) handleBoolAction(action Action) bool {
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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, filter, _ := reactor.React(actionCopy)
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if !handled {
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continue
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}
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return filter
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}
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panic(fmt.Errorf("unhandled %q action", action.GetExtensionPoint()))
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}
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// RegisterFakePlugin registers a FakePlugin with the given registry
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func RegisterFakePlugin(name string, plugin *FakePlugin, registry pluginregistry.Registry) {
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pluginregistry.Register(
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name,
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NewPluginFncFromFake(plugin),
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&FakePlugin{},
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&FakePluginArgs{},
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ValidateFakePluginArgs,
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SetDefaults_FakePluginArgs,
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registry,
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)
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}
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// RegisterFakeDeschedulePlugin registers a FakeDeschedulePlugin with the given registry
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func RegisterFakeDeschedulePlugin(name string, plugin *FakeDeschedulePlugin, registry pluginregistry.Registry) {
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pluginregistry.Register(
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name,
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NewFakeDeschedulePluginFncFromFake(plugin),
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&FakeDeschedulePlugin{},
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&FakeDeschedulePluginArgs{},
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ValidateFakePluginArgs,
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SetDefaults_FakePluginArgs,
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registry,
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)
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}
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// RegisterFakeBalancePlugin registers a FakeBalancePlugin with the given registry
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func RegisterFakeBalancePlugin(name string, plugin *FakeBalancePlugin, registry pluginregistry.Registry) {
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pluginregistry.Register(
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name,
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NewFakeBalancePluginFncFromFake(plugin),
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&FakeBalancePlugin{},
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&FakeBalancePluginArgs{},
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ValidateFakePluginArgs,
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SetDefaults_FakePluginArgs,
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registry,
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)
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}
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// RegisterFakeFilterPlugin registers a FakeFilterPlugin with the given registry
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func RegisterFakeFilterPlugin(name string, plugin *FakeFilterPlugin, registry pluginregistry.Registry) {
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pluginregistry.Register(
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name,
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NewFakeFilterPluginFncFromFake(plugin),
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&FakeFilterPlugin{},
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&FakeFilterPluginArgs{},
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ValidateFakePluginArgs,
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SetDefaults_FakePluginArgs,
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registry,
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)
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}
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