610 lines
18 KiB
Go
610 lines
18 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 runtimeclass
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import (
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"context"
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"strconv"
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"testing"
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corev1 "k8s.io/api/core/v1"
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v1 "k8s.io/api/core/v1"
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nodev1 "k8s.io/api/node/v1"
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"k8s.io/apimachinery/pkg/api/resource"
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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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"k8s.io/apiserver/pkg/admission"
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"k8s.io/apiserver/pkg/authentication/user"
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"k8s.io/client-go/informers"
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"k8s.io/client-go/kubernetes"
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"k8s.io/client-go/kubernetes/fake"
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"k8s.io/component-base/featuregate"
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"k8s.io/kubernetes/pkg/apis/core"
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api "k8s.io/kubernetes/pkg/apis/core"
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"k8s.io/kubernetes/pkg/controller"
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"k8s.io/kubernetes/pkg/features"
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"github.com/stretchr/testify/assert"
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)
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func newOverheadValidPod(name string, numContainers int, resources core.ResourceRequirements, setOverhead bool) *core.Pod {
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pod := &core.Pod{
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ObjectMeta: metav1.ObjectMeta{Name: name, Namespace: "test"},
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Spec: core.PodSpec{},
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}
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pod.Spec.Containers = make([]core.Container, 0, numContainers)
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for i := 0; i < numContainers; i++ {
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pod.Spec.Containers = append(pod.Spec.Containers, core.Container{
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Image: "foo:V" + strconv.Itoa(i),
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Resources: resources,
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Name: "foo-" + strconv.Itoa(i),
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})
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}
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if setOverhead {
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pod.Spec.Overhead = core.ResourceList{
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core.ResourceName(core.ResourceCPU): resource.MustParse("100m"),
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core.ResourceName(core.ResourceMemory): resource.MustParse("1"),
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}
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}
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return pod
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}
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func newSchedulingValidPod(name string, nodeSelector map[string]string, tolerations []core.Toleration) *core.Pod {
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return &core.Pod{
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ObjectMeta: metav1.ObjectMeta{Name: name, Namespace: "test"},
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Spec: core.PodSpec{
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NodeSelector: nodeSelector,
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Tolerations: tolerations,
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},
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}
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}
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func getGuaranteedRequirements() core.ResourceRequirements {
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resources := core.ResourceList{
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core.ResourceName(core.ResourceCPU): resource.MustParse("1"),
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core.ResourceName(core.ResourceMemory): resource.MustParse("10"),
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}
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return core.ResourceRequirements{Limits: resources, Requests: resources}
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}
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func TestSetOverhead(t *testing.T) {
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tests := []struct {
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name string
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runtimeClass *nodev1.RuntimeClass
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pod *core.Pod
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expectError bool
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expectedPod *core.Pod
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}{
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{
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name: "overhead, no container requirements",
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runtimeClass: &nodev1.RuntimeClass{
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ObjectMeta: metav1.ObjectMeta{Name: "foo"},
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Handler: "bar",
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Overhead: &nodev1.Overhead{
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PodFixed: corev1.ResourceList{
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corev1.ResourceName(corev1.ResourceCPU): resource.MustParse("100m"),
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corev1.ResourceName(corev1.ResourceMemory): resource.MustParse("1"),
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},
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},
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},
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pod: newOverheadValidPod("no-resource-req-no-overhead", 1, core.ResourceRequirements{}, false),
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expectError: false,
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expectedPod: newOverheadValidPod("no-resource-req-no-overhead", 1, core.ResourceRequirements{}, true),
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},
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{
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name: "overhead, guaranteed pod",
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runtimeClass: &nodev1.RuntimeClass{
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ObjectMeta: metav1.ObjectMeta{Name: "foo"},
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Handler: "bar",
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Overhead: &nodev1.Overhead{
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PodFixed: corev1.ResourceList{
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corev1.ResourceName(corev1.ResourceCPU): resource.MustParse("100m"),
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corev1.ResourceName(corev1.ResourceMemory): resource.MustParse("1"),
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},
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},
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},
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pod: newOverheadValidPod("guaranteed", 1, getGuaranteedRequirements(), false),
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expectError: false,
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expectedPod: newOverheadValidPod("guaranteed", 1, core.ResourceRequirements{}, true),
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},
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{
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name: "overhead, pod with differing overhead already set",
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runtimeClass: &nodev1.RuntimeClass{
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ObjectMeta: metav1.ObjectMeta{Name: "foo"},
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Handler: "bar",
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Overhead: &nodev1.Overhead{
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PodFixed: corev1.ResourceList{
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corev1.ResourceName(corev1.ResourceCPU): resource.MustParse("10"),
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corev1.ResourceName(corev1.ResourceMemory): resource.MustParse("10G"),
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},
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},
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},
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pod: newOverheadValidPod("empty-requiremennts-overhead", 1, core.ResourceRequirements{}, true),
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expectError: true,
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expectedPod: nil,
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},
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{
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name: "overhead, pod with same overhead already set",
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runtimeClass: &nodev1.RuntimeClass{
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ObjectMeta: metav1.ObjectMeta{Name: "foo"},
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Handler: "bar",
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Overhead: &nodev1.Overhead{
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PodFixed: corev1.ResourceList{
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corev1.ResourceName(corev1.ResourceCPU): resource.MustParse("100m"),
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corev1.ResourceName(corev1.ResourceMemory): resource.MustParse("1"),
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},
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},
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},
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pod: newOverheadValidPod("empty-requiremennts-overhead", 1, core.ResourceRequirements{}, true),
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expectError: false,
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expectedPod: nil,
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},
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}
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for _, tc := range tests {
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t.Run(tc.name, func(t *testing.T) {
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attrs := admission.NewAttributesRecord(tc.pod, nil, core.Kind("Pod").WithVersion("version"), tc.pod.Namespace, tc.pod.Name, core.Resource("pods").WithVersion("version"), "", admission.Create, &metav1.CreateOptions{}, false, &user.DefaultInfo{})
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errs := setOverhead(attrs, tc.pod, tc.runtimeClass)
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if tc.expectError {
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assert.NotEmpty(t, errs)
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} else {
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assert.Empty(t, errs)
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}
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})
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}
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}
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func TestSetScheduling(t *testing.T) {
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tests := []struct {
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name string
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runtimeClass *nodev1.RuntimeClass
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pod *core.Pod
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expectError bool
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expectedPod *core.Pod
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}{
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{
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name: "scheduling, nil scheduling",
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runtimeClass: &nodev1.RuntimeClass{
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ObjectMeta: metav1.ObjectMeta{Name: "foo"},
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Handler: "bar",
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Scheduling: nil,
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},
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pod: newSchedulingValidPod("pod-with-conflict-node-selector", map[string]string{"foo": "bar"}, []core.Toleration{}),
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expectError: false,
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expectedPod: newSchedulingValidPod("pod-with-conflict-node-selector", map[string]string{"foo": "bar"}, []core.Toleration{}),
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},
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{
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name: "scheduling, conflict node selector",
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runtimeClass: &nodev1.RuntimeClass{
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ObjectMeta: metav1.ObjectMeta{Name: "foo"},
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Handler: "bar",
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Scheduling: &nodev1.Scheduling{
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NodeSelector: map[string]string{
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"foo": "conflict",
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},
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},
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},
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pod: newSchedulingValidPod("pod-with-conflict-node-selector", map[string]string{"foo": "bar"}, []core.Toleration{}),
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expectError: true,
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},
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{
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name: "scheduling, nil node selector",
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runtimeClass: &nodev1.RuntimeClass{
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ObjectMeta: metav1.ObjectMeta{Name: "foo"},
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Handler: "bar",
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Scheduling: &nodev1.Scheduling{
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NodeSelector: map[string]string{
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"foo": "bar",
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},
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},
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},
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pod: newSchedulingValidPod("pod-with-conflict-node-selector", nil, nil),
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expectError: false,
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expectedPod: newSchedulingValidPod("pod-with-conflict-node-selector", map[string]string{"foo": "bar"}, nil),
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},
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{
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name: "scheduling, node selector with the same key value",
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runtimeClass: &nodev1.RuntimeClass{
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ObjectMeta: metav1.ObjectMeta{Name: "foo"},
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Handler: "bar",
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Scheduling: &nodev1.Scheduling{
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NodeSelector: map[string]string{
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"foo": "bar",
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},
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},
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},
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pod: newSchedulingValidPod("pod-with-same-key-value-node-selector", map[string]string{"foo": "bar"}, nil),
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expectError: false,
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expectedPod: newSchedulingValidPod("pod-with-same-key-value-node-selector", map[string]string{"foo": "bar"}, nil),
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},
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{
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name: "scheduling, node selector with different key value",
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runtimeClass: &nodev1.RuntimeClass{
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ObjectMeta: metav1.ObjectMeta{Name: "foo"},
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Handler: "bar",
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Scheduling: &nodev1.Scheduling{
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NodeSelector: map[string]string{
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"foo": "bar",
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"fizz": "buzz",
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},
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},
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},
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pod: newSchedulingValidPod("pod-with-different-key-value-node-selector", map[string]string{"foo": "bar"}, nil),
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expectError: false,
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expectedPod: newSchedulingValidPod("pod-with-different-key-value-node-selector", map[string]string{"foo": "bar", "fizz": "buzz"}, nil),
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},
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{
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name: "scheduling, multiple tolerations",
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runtimeClass: &nodev1.RuntimeClass{
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ObjectMeta: metav1.ObjectMeta{Name: "foo"},
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Handler: "bar",
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Scheduling: &nodev1.Scheduling{
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Tolerations: []v1.Toleration{
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{
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Key: "foo",
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Operator: v1.TolerationOpEqual,
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Value: "bar",
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Effect: v1.TaintEffectNoSchedule,
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},
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{
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Key: "fizz",
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Operator: v1.TolerationOpEqual,
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Value: "buzz",
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Effect: v1.TaintEffectNoSchedule,
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},
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},
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},
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},
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pod: newSchedulingValidPod("pod-with-tolerations", map[string]string{"foo": "bar"},
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[]core.Toleration{
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{
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Key: "foo",
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Operator: core.TolerationOpEqual,
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Value: "bar",
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Effect: core.TaintEffectNoSchedule,
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},
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}),
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expectError: false,
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expectedPod: newSchedulingValidPod("pod-with-tolerations", map[string]string{"foo": "bar"},
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[]core.Toleration{
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{
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Key: "foo",
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Operator: core.TolerationOpEqual,
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Value: "bar",
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Effect: core.TaintEffectNoSchedule,
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},
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{
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Key: "fizz",
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Operator: core.TolerationOpEqual,
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Value: "buzz",
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Effect: core.TaintEffectNoSchedule,
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},
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}),
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},
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}
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for _, tc := range tests {
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t.Run(tc.name, func(t *testing.T) {
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attrs := admission.NewAttributesRecord(tc.pod, nil, core.Kind("Pod").WithVersion("version"), tc.pod.Namespace, tc.pod.Name, core.Resource("pods").WithVersion("version"), "", admission.Create, &metav1.CreateOptions{}, false, &user.DefaultInfo{})
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errs := setScheduling(attrs, tc.pod, tc.runtimeClass)
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if tc.expectError {
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assert.NotEmpty(t, errs)
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} else {
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assert.Equal(t, tc.expectedPod, tc.pod)
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assert.Empty(t, errs)
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}
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})
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}
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}
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func NewObjectInterfacesForTest() admission.ObjectInterfaces {
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scheme := runtime.NewScheme()
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corev1.AddToScheme(scheme)
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return admission.NewObjectInterfacesFromScheme(scheme)
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}
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func newRuntimeClassForTest(
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featureInspection bool,
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addLister bool,
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listerObject *nodev1.RuntimeClass,
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addClient bool,
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clientObject *nodev1.RuntimeClass) *RuntimeClass {
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runtimeClass := NewRuntimeClass()
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if featureInspection {
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relevantFeatures := map[featuregate.Feature]featuregate.FeatureSpec{
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features.PodOverhead: {Default: false},
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}
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fg := featuregate.NewFeatureGate()
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fg.Add(relevantFeatures)
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runtimeClass.InspectFeatureGates(fg)
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}
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if addLister {
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informerFactory := informers.NewSharedInformerFactory(nil, controller.NoResyncPeriodFunc())
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runtimeClass.SetExternalKubeInformerFactory(informerFactory)
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if listerObject != nil {
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informerFactory.Node().V1().RuntimeClasses().Informer().GetStore().Add(listerObject)
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}
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}
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if addClient {
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var client kubernetes.Interface
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if clientObject != nil {
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client = fake.NewSimpleClientset(clientObject)
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} else {
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client = fake.NewSimpleClientset()
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}
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runtimeClass.SetExternalKubeClientSet(client)
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}
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return runtimeClass
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}
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func TestValidateInitialization(t *testing.T) {
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tests := []struct {
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name string
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expectError bool
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runtimeClass *RuntimeClass
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}{
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{
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name: "runtimeClass enabled, success",
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expectError: false,
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runtimeClass: newRuntimeClassForTest(true, true, nil, true, nil),
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},
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{
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name: "runtimeClass enabled, no feature inspection",
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expectError: true,
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runtimeClass: newRuntimeClassForTest(false, true, nil, true, nil),
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},
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{
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name: "runtimeClass enabled, no lister",
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expectError: true,
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runtimeClass: newRuntimeClassForTest(true, false, nil, true, nil),
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},
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{
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name: "runtimeClass enabled, no client",
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expectError: true,
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runtimeClass: newRuntimeClassForTest(true, true, nil, false, nil),
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},
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}
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for _, tc := range tests {
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t.Run(tc.name, func(t *testing.T) {
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err := tc.runtimeClass.ValidateInitialization()
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if tc.expectError {
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assert.NotEmpty(t, err)
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} else {
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assert.Empty(t, err)
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}
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})
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}
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}
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func TestAdmit(t *testing.T) {
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runtimeClassName := "runtimeClassName"
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rc := &nodev1.RuntimeClass{
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ObjectMeta: metav1.ObjectMeta{Name: runtimeClassName},
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}
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pod := api.Pod{
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ObjectMeta: metav1.ObjectMeta{Name: "podname"},
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Spec: api.PodSpec{
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RuntimeClassName: &runtimeClassName,
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},
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}
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attributes := admission.NewAttributesRecord(&pod,
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nil,
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api.Kind("kind").WithVersion("version"),
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"",
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"",
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api.Resource("pods").WithVersion("version"),
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"",
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admission.Create,
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nil,
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false,
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nil)
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tests := []struct {
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name string
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expectError bool
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runtimeClass *RuntimeClass
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}{
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{
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name: "runtimeClass found by lister",
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expectError: false,
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runtimeClass: newRuntimeClassForTest(true, true, rc, true, nil),
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},
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{
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name: "runtimeClass found by client",
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expectError: false,
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runtimeClass: newRuntimeClassForTest(true, true, nil, true, rc),
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},
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{
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name: "runtimeClass not found by lister nor client",
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expectError: true,
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runtimeClass: newRuntimeClassForTest(true, true, nil, true, nil),
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},
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}
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for _, tc := range tests {
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t.Run(tc.name, func(t *testing.T) {
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err := tc.runtimeClass.Admit(context.TODO(), attributes, nil)
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if tc.expectError {
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assert.NotEmpty(t, err)
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} else {
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assert.Empty(t, err)
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}
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})
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}
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}
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func TestValidate(t *testing.T) {
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tests := []struct {
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name string
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runtimeClass *nodev1.RuntimeClass
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pod *core.Pod
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expectError bool
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}{
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{
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name: "No Overhead in RunntimeClass, Overhead set in pod",
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runtimeClass: &nodev1.RuntimeClass{
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ObjectMeta: metav1.ObjectMeta{Name: "foo"},
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Handler: "bar",
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},
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pod: newOverheadValidPod("no-resource-req-no-overhead", 1, getGuaranteedRequirements(), true),
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expectError: true,
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},
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{
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name: "Non-matching Overheads",
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runtimeClass: &nodev1.RuntimeClass{
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ObjectMeta: metav1.ObjectMeta{Name: "foo"},
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Handler: "bar",
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Overhead: &nodev1.Overhead{
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PodFixed: corev1.ResourceList{
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corev1.ResourceName(corev1.ResourceCPU): resource.MustParse("10"),
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corev1.ResourceName(corev1.ResourceMemory): resource.MustParse("10G"),
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},
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},
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},
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pod: newOverheadValidPod("no-resource-req-no-overhead", 1, core.ResourceRequirements{}, true),
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expectError: true,
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},
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{
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name: "Matching Overheads",
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runtimeClass: &nodev1.RuntimeClass{
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ObjectMeta: metav1.ObjectMeta{Name: "foo"},
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Handler: "bar",
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Overhead: &nodev1.Overhead{
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PodFixed: corev1.ResourceList{
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corev1.ResourceName(corev1.ResourceCPU): resource.MustParse("100m"),
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corev1.ResourceName(corev1.ResourceMemory): resource.MustParse("1"),
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},
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},
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},
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pod: newOverheadValidPod("no-resource-req-no-overhead", 1, core.ResourceRequirements{}, false),
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expectError: false,
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},
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}
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rt := NewRuntimeClass()
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rt.podOverheadEnabled = true
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o := NewObjectInterfacesForTest()
|
|
for _, tc := range tests {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
|
|
attrs := admission.NewAttributesRecord(tc.pod, nil, core.Kind("Pod").WithVersion("version"), tc.pod.Namespace, tc.pod.Name, core.Resource("pods").WithVersion("version"), "", admission.Create, &metav1.CreateOptions{}, false, &user.DefaultInfo{})
|
|
|
|
errs := rt.Validate(context.TODO(), attrs, o)
|
|
if tc.expectError {
|
|
assert.NotEmpty(t, errs)
|
|
} else {
|
|
assert.Empty(t, errs)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestValidateOverhead(t *testing.T) {
|
|
tests := []struct {
|
|
name string
|
|
runtimeClass *nodev1.RuntimeClass
|
|
pod *core.Pod
|
|
expectError bool
|
|
}{
|
|
{
|
|
name: "Overhead part of RuntimeClass, no Overhead defined in pod",
|
|
runtimeClass: &nodev1.RuntimeClass{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "foo"},
|
|
Handler: "bar",
|
|
Overhead: &nodev1.Overhead{
|
|
PodFixed: corev1.ResourceList{
|
|
corev1.ResourceName(corev1.ResourceCPU): resource.MustParse("100m"),
|
|
corev1.ResourceName(corev1.ResourceMemory): resource.MustParse("1"),
|
|
},
|
|
},
|
|
},
|
|
pod: newOverheadValidPod("no-requirements", 1, core.ResourceRequirements{}, false),
|
|
expectError: true,
|
|
},
|
|
{
|
|
name: "No Overhead in RunntimeClass, Overhead set in pod",
|
|
runtimeClass: &nodev1.RuntimeClass{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "foo"},
|
|
Handler: "bar",
|
|
},
|
|
pod: newOverheadValidPod("no-resource-req-no-overhead", 1, getGuaranteedRequirements(), true),
|
|
expectError: true,
|
|
},
|
|
{
|
|
name: "No RunntimeClass, Overhead set in pod",
|
|
runtimeClass: nil,
|
|
pod: newOverheadValidPod("no-resource-req-no-overhead", 1, getGuaranteedRequirements(), true),
|
|
expectError: true,
|
|
},
|
|
{
|
|
name: "Non-matching Overheads",
|
|
runtimeClass: &nodev1.RuntimeClass{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "foo"},
|
|
Handler: "bar",
|
|
Overhead: &nodev1.Overhead{
|
|
PodFixed: corev1.ResourceList{
|
|
corev1.ResourceName(corev1.ResourceCPU): resource.MustParse("10"),
|
|
corev1.ResourceName(corev1.ResourceMemory): resource.MustParse("10G"),
|
|
},
|
|
},
|
|
},
|
|
pod: newOverheadValidPod("no-resource-req-no-overhead", 1, core.ResourceRequirements{}, true),
|
|
expectError: true,
|
|
},
|
|
{
|
|
name: "Matching Overheads",
|
|
runtimeClass: &nodev1.RuntimeClass{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "foo"},
|
|
Handler: "bar",
|
|
Overhead: &nodev1.Overhead{
|
|
PodFixed: corev1.ResourceList{
|
|
corev1.ResourceName(corev1.ResourceCPU): resource.MustParse("100m"),
|
|
corev1.ResourceName(corev1.ResourceMemory): resource.MustParse("1"),
|
|
},
|
|
},
|
|
},
|
|
pod: newOverheadValidPod("no-resource-req-no-overhead", 1, core.ResourceRequirements{}, true),
|
|
expectError: false,
|
|
},
|
|
}
|
|
|
|
for _, tc := range tests {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
attrs := admission.NewAttributesRecord(tc.pod, nil, core.Kind("Pod").WithVersion("version"), tc.pod.Namespace, tc.pod.Name, core.Resource("pods").WithVersion("version"), "", admission.Create, &metav1.CreateOptions{}, false, &user.DefaultInfo{})
|
|
|
|
errs := validateOverhead(attrs, tc.pod, tc.runtimeClass)
|
|
if tc.expectError {
|
|
assert.NotEmpty(t, errs)
|
|
} else {
|
|
assert.Empty(t, errs)
|
|
}
|
|
})
|
|
}
|
|
}
|