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/*
Copyright 2024 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package testing
import (
"context"
"fmt"
"sync"
"sync/atomic"
"testing"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/rand"
"k8s.io/apiserver/pkg/apis/example"
"k8s.io/apiserver/pkg/endpoints/request"
"k8s.io/apiserver/pkg/storage"
)
type scope string
var (
cluster scope = "Cluster"
node scope = "Node"
namespace scope = "Namespace"
)
func RunBenchmarkStoreListCreate(ctx context.Context, b *testing.B, store storage.Interface, match metav1.ResourceVersionMatch) {
objectCount := atomic.Uint64{}
pods := make([]*example.Pod, 0, b.N)
for i := 0; i < b.N; i++ {
name := rand.String(100)
pods = append(pods, &example.Pod{ObjectMeta: metav1.ObjectMeta{Namespace: "ns", Name: name}})
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
pod := pods[i]
podOut := &example.Pod{}
err := store.Create(ctx, computePodKey(pod), pod, podOut, 0)
if err != nil {
panic(fmt.Sprintf("Unexpected error %s", err))
}
listOut := &example.PodList{}
err = store.GetList(ctx, "/pods", storage.ListOptions{
Recursive: true,
ResourceVersion: podOut.ResourceVersion,
ResourceVersionMatch: match,
Predicate: storage.SelectionPredicate{
Label: labels.Everything(),
Field: fields.Everything(),
Limit: 1,
},
}, listOut)
if err != nil {
panic(fmt.Sprintf("Unexpected error %s", err))
}
if len(listOut.Items) != 1 {
b.Errorf("Expected to get 1 element, got %d", len(listOut.Items))
}
objectCount.Add(uint64(len(listOut.Items)))
}
b.ReportMetric(float64(objectCount.Load())/float64(b.N), "objects/op")
}
func RunBenchmarkStoreList(ctx context.Context, b *testing.B, store storage.Interface, data BenchmarkData, useIndex bool) {
for _, rvm := range []metav1.ResourceVersionMatch{"", metav1.ResourceVersionMatchExact, metav1.ResourceVersionMatchNotOlderThan} {
b.Run(fmt.Sprintf("RV=%s", rvm), func(b *testing.B) {
for _, scope := range []scope{cluster, node, namespace} {
b.Run(fmt.Sprintf("Scope=%s", scope), func(b *testing.B) {
var expectedElements int
switch scope {
case namespace:
expectedElements = len(data.Pods) / len(data.NamespaceNames)
case node:
expectedElements = len(data.Pods) / len(data.NodeNames)
case cluster:
expectedElements = len(data.Pods)
}
limitOptions := []int64{0}
switch {
case expectedElements > 1000:
limitOptions = append(limitOptions, 1000)
case expectedElements > 100:
limitOptions = append(limitOptions, 100)
}
for _, limit := range limitOptions {
b.Run(fmt.Sprintf("Paginate=%v", limit), func(b *testing.B) {
runBenchmarkStoreList(ctx, b, store, limit, rvm, scope, data, useIndex)
})
}
})
}
})
}
}
func runBenchmarkStoreList(ctx context.Context, b *testing.B, store storage.Interface, limit int64, match metav1.ResourceVersionMatch, scope scope, data BenchmarkData, useIndex bool) {
wg := sync.WaitGroup{}
objectCount := atomic.Uint64{}
pageCount := atomic.Uint64{}
for i := 0; i < b.N; i++ {
wg.Add(1)
resourceVersion := ""
switch match {
case metav1.ResourceVersionMatchExact, metav1.ResourceVersionMatchNotOlderThan:
maxRevision := 1 + len(data.Pods)
resourceVersion = fmt.Sprintf("%d", maxRevision-99+i%100)
}
go func(resourceVersion, nodeName, namespaceName string) {
defer wg.Done()
opts := storage.ListOptions{
Recursive: true,
ResourceVersion: resourceVersion,
ResourceVersionMatch: match,
Predicate: storage.SelectionPredicate{
GetAttrs: podAttr,
Label: labels.Everything(),
Field: fields.Everything(),
Limit: limit,
},
}
switch scope {
case cluster:
objects, pages := paginateList(ctx, store, "/pods/", opts)
objectCount.Add(uint64(objects))
pageCount.Add(uint64(pages))
case node:
if useIndex {
opts.Predicate.GetAttrs = podAttr
opts.Predicate.IndexFields = []string{"spec.nodeName"}
opts.Predicate.Field = fields.SelectorFromSet(fields.Set{"spec.nodeName": nodeName})
}
objects, pages := paginateList(ctx, store, "/pods/", opts)
objectCount.Add(uint64(objects))
pageCount.Add(uint64(pages))
case namespace:
ctx := ctx
if useIndex {
opts.Predicate.IndexFields = []string{"metadata.namespace"}
ctx = request.WithRequestInfo(ctx, &request.RequestInfo{Namespace: namespaceName})
}
objects, pages := paginateList(ctx, store, "/pods/"+namespaceName, opts)
objectCount.Add(uint64(objects))
pageCount.Add(uint64(pages))
}
}(resourceVersion, data.NodeNames[i%len(data.NodeNames)], data.NamespaceNames[i%len(data.NamespaceNames)])
}
wg.Wait()
b.ReportMetric(float64(objectCount.Load())/float64(b.N), "objects/op")
b.ReportMetric(float64(pageCount.Load())/float64(b.N), "pages/op")
}
func paginateList(ctx context.Context, store storage.Interface, key string, opts storage.ListOptions) (objectCount int, pageCount int) {
listOut := &example.PodList{}
err := store.GetList(ctx, key, opts, listOut)
if err != nil {
panic(fmt.Sprintf("Unexpected error %s", err))
}
opts.Predicate.Continue = listOut.Continue
opts.ResourceVersion = ""
opts.ResourceVersionMatch = ""
pageCount += 1
objectCount += len(listOut.Items)
for opts.Predicate.Continue != "" {
listOut := &example.PodList{}
err := store.GetList(ctx, key, opts, listOut)
if err != nil {
panic(fmt.Sprintf("Unexpected error %s", err))
}
opts.Predicate.Continue = listOut.Continue
pageCount += 1
objectCount += len(listOut.Items)
}
return objectCount, pageCount
}
func podAttr(obj runtime.Object) (labels.Set, fields.Set, error) {
pod := obj.(*example.Pod)
return nil, fields.Set{
"spec.nodeName": pod.Spec.NodeName,
"metadata.namespace": pod.Namespace,
}, nil
}
func PrepareBenchchmarkData(namespaceCount, podPerNamespaceCount, nodeCount int) (data BenchmarkData) {
data.NodeNames = make([]string, nodeCount)
for i := 0; i < nodeCount; i++ {
data.NodeNames[i] = rand.String(10)
}
data.NamespaceNames = make([]string, namespaceCount)
for i := 0; i < namespaceCount; i++ {
namespace := rand.String(10)
data.NamespaceNames[i] = namespace
for j := 0; j < podPerNamespaceCount; j++ {
name := rand.String(10)
data.Pods = append(data.Pods, &example.Pod{ObjectMeta: metav1.ObjectMeta{Namespace: namespace, Name: name}, Spec: example.PodSpec{NodeName: data.NodeNames[rand.Intn(nodeCount)]}})
}
}
return data
}
type BenchmarkData struct {
Pods []*example.Pod
NamespaceNames []string
NodeNames []string
}
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