598 lines
19 KiB
Go
598 lines
19 KiB
Go
// +build linux
|
|
|
|
/*
|
|
Copyright 2015 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 e2e_node
|
|
|
|
import (
|
|
"fmt"
|
|
"sort"
|
|
"strconv"
|
|
"sync"
|
|
"time"
|
|
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/apimachinery/pkg/labels"
|
|
"k8s.io/apimachinery/pkg/runtime"
|
|
"k8s.io/apimachinery/pkg/watch"
|
|
"k8s.io/kubernetes/pkg/api/v1"
|
|
"k8s.io/kubernetes/pkg/client/cache"
|
|
"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/stats"
|
|
kubemetrics "k8s.io/kubernetes/pkg/kubelet/metrics"
|
|
"k8s.io/kubernetes/pkg/metrics"
|
|
"k8s.io/kubernetes/test/e2e/framework"
|
|
|
|
. "github.com/onsi/ginkgo"
|
|
. "github.com/onsi/gomega"
|
|
)
|
|
|
|
const (
|
|
kubeletAddr = "localhost:10255"
|
|
)
|
|
|
|
var _ = framework.KubeDescribe("Density [Serial] [Slow]", func() {
|
|
const (
|
|
// The data collection time of resource collector and the standalone cadvisor
|
|
// is not synchronizated, so resource collector may miss data or
|
|
// collect duplicated data
|
|
containerStatsPollingPeriod = 500 * time.Millisecond
|
|
)
|
|
|
|
var (
|
|
rc *ResourceCollector
|
|
)
|
|
|
|
f := framework.NewDefaultFramework("density-test")
|
|
|
|
BeforeEach(func() {
|
|
// Start a standalone cadvisor pod using 'createSync', the pod is running when it returns
|
|
f.PodClient().CreateSync(getCadvisorPod())
|
|
// Resource collector monitors fine-grain CPU/memory usage by a standalone Cadvisor with
|
|
// 1s housingkeeping interval
|
|
rc = NewResourceCollector(containerStatsPollingPeriod)
|
|
})
|
|
|
|
Context("create a batch of pods", func() {
|
|
// TODO(coufon): the values are generous, set more precise limits with benchmark data
|
|
// and add more tests
|
|
dTests := []densityTest{
|
|
{
|
|
podsNr: 10,
|
|
interval: 0 * time.Millisecond,
|
|
cpuLimits: framework.ContainersCPUSummary{
|
|
stats.SystemContainerKubelet: {0.50: 0.30, 0.95: 0.50},
|
|
stats.SystemContainerRuntime: {0.50: 0.40, 0.95: 0.60},
|
|
},
|
|
memLimits: framework.ResourceUsagePerContainer{
|
|
stats.SystemContainerKubelet: &framework.ContainerResourceUsage{MemoryRSSInBytes: 100 * 1024 * 1024},
|
|
stats.SystemContainerRuntime: &framework.ContainerResourceUsage{MemoryRSSInBytes: 500 * 1024 * 1024},
|
|
},
|
|
// percentile limit of single pod startup latency
|
|
podStartupLimits: framework.LatencyMetric{
|
|
Perc50: 16 * time.Second,
|
|
Perc90: 18 * time.Second,
|
|
Perc99: 20 * time.Second,
|
|
},
|
|
// upbound of startup latency of a batch of pods
|
|
podBatchStartupLimit: 25 * time.Second,
|
|
},
|
|
}
|
|
|
|
for _, testArg := range dTests {
|
|
itArg := testArg
|
|
It(fmt.Sprintf("latency/resource should be within limit when create %d pods with %v interval",
|
|
itArg.podsNr, itArg.interval), func() {
|
|
itArg.createMethod = "batch"
|
|
testInfo := getTestNodeInfo(f, itArg.getTestName())
|
|
|
|
batchLag, e2eLags := runDensityBatchTest(f, rc, itArg, testInfo, false)
|
|
|
|
By("Verifying latency")
|
|
logAndVerifyLatency(batchLag, e2eLags, itArg.podStartupLimits, itArg.podBatchStartupLimit, testInfo, true)
|
|
|
|
By("Verifying resource")
|
|
logAndVerifyResource(f, rc, itArg.cpuLimits, itArg.memLimits, testInfo, true)
|
|
})
|
|
}
|
|
})
|
|
|
|
Context("create a batch of pods", func() {
|
|
dTests := []densityTest{
|
|
{
|
|
podsNr: 10,
|
|
interval: 0 * time.Millisecond,
|
|
},
|
|
{
|
|
podsNr: 35,
|
|
interval: 0 * time.Millisecond,
|
|
},
|
|
{
|
|
podsNr: 105,
|
|
interval: 0 * time.Millisecond,
|
|
},
|
|
{
|
|
podsNr: 10,
|
|
interval: 100 * time.Millisecond,
|
|
},
|
|
{
|
|
podsNr: 35,
|
|
interval: 100 * time.Millisecond,
|
|
},
|
|
{
|
|
podsNr: 105,
|
|
interval: 100 * time.Millisecond,
|
|
},
|
|
{
|
|
podsNr: 10,
|
|
interval: 300 * time.Millisecond,
|
|
},
|
|
{
|
|
podsNr: 35,
|
|
interval: 300 * time.Millisecond,
|
|
},
|
|
{
|
|
podsNr: 105,
|
|
interval: 300 * time.Millisecond,
|
|
},
|
|
}
|
|
|
|
for _, testArg := range dTests {
|
|
itArg := testArg
|
|
It(fmt.Sprintf("latency/resource should be within limit when create %d pods with %v interval [Benchmark]",
|
|
itArg.podsNr, itArg.interval), func() {
|
|
itArg.createMethod = "batch"
|
|
testInfo := getTestNodeInfo(f, itArg.getTestName())
|
|
|
|
batchLag, e2eLags := runDensityBatchTest(f, rc, itArg, testInfo, true)
|
|
|
|
By("Verifying latency")
|
|
logAndVerifyLatency(batchLag, e2eLags, itArg.podStartupLimits, itArg.podBatchStartupLimit, testInfo, false)
|
|
|
|
By("Verifying resource")
|
|
logAndVerifyResource(f, rc, itArg.cpuLimits, itArg.memLimits, testInfo, false)
|
|
})
|
|
}
|
|
})
|
|
|
|
Context("create a batch of pods with higher API QPS", func() {
|
|
dTests := []densityTest{
|
|
{
|
|
podsNr: 105,
|
|
interval: 0 * time.Millisecond,
|
|
APIQPSLimit: 60,
|
|
},
|
|
{
|
|
podsNr: 105,
|
|
interval: 100 * time.Millisecond,
|
|
APIQPSLimit: 60,
|
|
},
|
|
{
|
|
podsNr: 105,
|
|
interval: 300 * time.Millisecond,
|
|
APIQPSLimit: 60,
|
|
},
|
|
}
|
|
|
|
for _, testArg := range dTests {
|
|
itArg := testArg
|
|
It(fmt.Sprintf("latency/resource should be within limit when create %d pods with %v interval (QPS %d) [Benchmark]",
|
|
itArg.podsNr, itArg.interval, itArg.APIQPSLimit), func() {
|
|
itArg.createMethod = "batch"
|
|
testInfo := getTestNodeInfo(f, itArg.getTestName())
|
|
// The latency caused by API QPS limit takes a large portion (up to ~33%) of e2e latency.
|
|
// It makes the pod startup latency of Kubelet (creation throughput as well) under-estimated.
|
|
// Here we set API QPS limit from default 5 to 60 in order to test real Kubelet performance.
|
|
// Note that it will cause higher resource usage.
|
|
setKubeletAPIQPSLimit(f, int32(itArg.APIQPSLimit))
|
|
batchLag, e2eLags := runDensityBatchTest(f, rc, itArg, testInfo, true)
|
|
|
|
By("Verifying latency")
|
|
logAndVerifyLatency(batchLag, e2eLags, itArg.podStartupLimits, itArg.podBatchStartupLimit, testInfo, false)
|
|
|
|
By("Verifying resource")
|
|
logAndVerifyResource(f, rc, itArg.cpuLimits, itArg.memLimits, testInfo, false)
|
|
})
|
|
}
|
|
})
|
|
|
|
Context("create a sequence of pods", func() {
|
|
dTests := []densityTest{
|
|
{
|
|
podsNr: 10,
|
|
bgPodsNr: 50,
|
|
cpuLimits: framework.ContainersCPUSummary{
|
|
stats.SystemContainerKubelet: {0.50: 0.30, 0.95: 0.50},
|
|
stats.SystemContainerRuntime: {0.50: 0.40, 0.95: 0.60},
|
|
},
|
|
memLimits: framework.ResourceUsagePerContainer{
|
|
stats.SystemContainerKubelet: &framework.ContainerResourceUsage{MemoryRSSInBytes: 100 * 1024 * 1024},
|
|
stats.SystemContainerRuntime: &framework.ContainerResourceUsage{MemoryRSSInBytes: 500 * 1024 * 1024},
|
|
},
|
|
podStartupLimits: framework.LatencyMetric{
|
|
Perc50: 5000 * time.Millisecond,
|
|
Perc90: 9000 * time.Millisecond,
|
|
Perc99: 10000 * time.Millisecond,
|
|
},
|
|
},
|
|
}
|
|
|
|
for _, testArg := range dTests {
|
|
itArg := testArg
|
|
It(fmt.Sprintf("latency/resource should be within limit when create %d pods with %d background pods",
|
|
itArg.podsNr, itArg.bgPodsNr), func() {
|
|
itArg.createMethod = "sequence"
|
|
testInfo := getTestNodeInfo(f, itArg.getTestName())
|
|
batchlag, e2eLags := runDensitySeqTest(f, rc, itArg, testInfo)
|
|
|
|
By("Verifying latency")
|
|
logAndVerifyLatency(batchlag, e2eLags, itArg.podStartupLimits, itArg.podBatchStartupLimit, testInfo, true)
|
|
|
|
By("Verifying resource")
|
|
logAndVerifyResource(f, rc, itArg.cpuLimits, itArg.memLimits, testInfo, true)
|
|
})
|
|
}
|
|
})
|
|
|
|
Context("create a sequence of pods", func() {
|
|
dTests := []densityTest{
|
|
{
|
|
podsNr: 10,
|
|
bgPodsNr: 50,
|
|
},
|
|
{
|
|
podsNr: 30,
|
|
bgPodsNr: 50,
|
|
},
|
|
{
|
|
podsNr: 50,
|
|
bgPodsNr: 50,
|
|
},
|
|
}
|
|
|
|
for _, testArg := range dTests {
|
|
itArg := testArg
|
|
It(fmt.Sprintf("latency/resource should be within limit when create %d pods with %d background pods [Benchmark]",
|
|
itArg.podsNr, itArg.bgPodsNr), func() {
|
|
itArg.createMethod = "sequence"
|
|
testInfo := getTestNodeInfo(f, itArg.getTestName())
|
|
batchlag, e2eLags := runDensitySeqTest(f, rc, itArg, testInfo)
|
|
|
|
By("Verifying latency")
|
|
logAndVerifyLatency(batchlag, e2eLags, itArg.podStartupLimits, itArg.podBatchStartupLimit, testInfo, false)
|
|
|
|
By("Verifying resource")
|
|
logAndVerifyResource(f, rc, itArg.cpuLimits, itArg.memLimits, testInfo, false)
|
|
})
|
|
}
|
|
})
|
|
})
|
|
|
|
type densityTest struct {
|
|
// number of pods
|
|
podsNr int
|
|
// number of background pods
|
|
bgPodsNr int
|
|
// interval between creating pod (rate control)
|
|
interval time.Duration
|
|
// create pods in 'batch' or 'sequence'
|
|
createMethod string
|
|
// API QPS limit
|
|
APIQPSLimit int
|
|
// performance limits
|
|
cpuLimits framework.ContainersCPUSummary
|
|
memLimits framework.ResourceUsagePerContainer
|
|
podStartupLimits framework.LatencyMetric
|
|
podBatchStartupLimit time.Duration
|
|
}
|
|
|
|
func (dt *densityTest) getTestName() string {
|
|
// The current default API QPS limit is 5
|
|
// TODO(coufon): is there any way to not hard code this?
|
|
APIQPSLimit := 5
|
|
if dt.APIQPSLimit > 0 {
|
|
APIQPSLimit = dt.APIQPSLimit
|
|
}
|
|
return fmt.Sprintf("density_create_%s_%d_%d_%d_%d", dt.createMethod, dt.podsNr, dt.bgPodsNr,
|
|
dt.interval.Nanoseconds()/1000000, APIQPSLimit)
|
|
}
|
|
|
|
// runDensityBatchTest runs the density batch pod creation test
|
|
func runDensityBatchTest(f *framework.Framework, rc *ResourceCollector, testArg densityTest, testInfo map[string]string,
|
|
isLogTimeSeries bool) (time.Duration, []framework.PodLatencyData) {
|
|
const (
|
|
podType = "density_test_pod"
|
|
sleepBeforeCreatePods = 30 * time.Second
|
|
)
|
|
var (
|
|
mutex = &sync.Mutex{}
|
|
watchTimes = make(map[string]metav1.Time, 0)
|
|
stopCh = make(chan struct{})
|
|
)
|
|
|
|
// create test pod data structure
|
|
pods := newTestPods(testArg.podsNr, framework.GetPauseImageNameForHostArch(), podType)
|
|
|
|
// the controller watches the change of pod status
|
|
controller := newInformerWatchPod(f, mutex, watchTimes, podType)
|
|
go controller.Run(stopCh)
|
|
defer close(stopCh)
|
|
|
|
// TODO(coufon): in the test we found kubelet starts while it is busy on something, as a result 'syncLoop'
|
|
// does not response to pod creation immediately. Creating the first pod has a delay around 5s.
|
|
// The node status has already been 'ready' so `wait and check node being ready does not help here.
|
|
// Now wait here for a grace period to let 'syncLoop' be ready
|
|
time.Sleep(sleepBeforeCreatePods)
|
|
|
|
rc.Start()
|
|
// Explicitly delete pods to prevent namespace controller cleanning up timeout
|
|
defer deletePodsSync(f, append(pods, getCadvisorPod()))
|
|
defer rc.Stop()
|
|
|
|
By("Creating a batch of pods")
|
|
// It returns a map['pod name']'creation time' containing the creation timestamps
|
|
createTimes := createBatchPodWithRateControl(f, pods, testArg.interval)
|
|
|
|
By("Waiting for all Pods to be observed by the watch...")
|
|
|
|
Eventually(func() bool {
|
|
return len(watchTimes) == testArg.podsNr
|
|
}, 10*time.Minute, 10*time.Second).Should(BeTrue())
|
|
|
|
if len(watchTimes) < testArg.podsNr {
|
|
framework.Failf("Timeout reached waiting for all Pods to be observed by the watch.")
|
|
}
|
|
|
|
// Analyze results
|
|
var (
|
|
firstCreate metav1.Time
|
|
lastRunning metav1.Time
|
|
init = true
|
|
e2eLags = make([]framework.PodLatencyData, 0)
|
|
)
|
|
|
|
for name, create := range createTimes {
|
|
watch, ok := watchTimes[name]
|
|
Expect(ok).To(Equal(true))
|
|
|
|
e2eLags = append(e2eLags,
|
|
framework.PodLatencyData{Name: name, Latency: watch.Time.Sub(create.Time)})
|
|
|
|
if !init {
|
|
if firstCreate.Time.After(create.Time) {
|
|
firstCreate = create
|
|
}
|
|
if lastRunning.Time.Before(watch.Time) {
|
|
lastRunning = watch
|
|
}
|
|
} else {
|
|
init = false
|
|
firstCreate, lastRunning = create, watch
|
|
}
|
|
}
|
|
|
|
sort.Sort(framework.LatencySlice(e2eLags))
|
|
batchLag := lastRunning.Time.Sub(firstCreate.Time)
|
|
|
|
// Log time series data.
|
|
if isLogTimeSeries {
|
|
logDensityTimeSeries(rc, createTimes, watchTimes, testInfo)
|
|
}
|
|
// Log throughput data.
|
|
logPodCreateThroughput(batchLag, e2eLags, testArg.podsNr, testInfo)
|
|
|
|
return batchLag, e2eLags
|
|
}
|
|
|
|
// runDensitySeqTest runs the density sequential pod creation test
|
|
func runDensitySeqTest(f *framework.Framework, rc *ResourceCollector, testArg densityTest, testInfo map[string]string) (time.Duration, []framework.PodLatencyData) {
|
|
const (
|
|
podType = "density_test_pod"
|
|
sleepBeforeCreatePods = 30 * time.Second
|
|
)
|
|
bgPods := newTestPods(testArg.bgPodsNr, framework.GetPauseImageNameForHostArch(), "background_pod")
|
|
testPods := newTestPods(testArg.podsNr, framework.GetPauseImageNameForHostArch(), podType)
|
|
|
|
By("Creating a batch of background pods")
|
|
|
|
// CreatBatch is synchronized, all pods are running when it returns
|
|
f.PodClient().CreateBatch(bgPods)
|
|
|
|
time.Sleep(sleepBeforeCreatePods)
|
|
|
|
rc.Start()
|
|
// Explicitly delete pods to prevent namespace controller cleanning up timeout
|
|
defer deletePodsSync(f, append(bgPods, append(testPods, getCadvisorPod())...))
|
|
defer rc.Stop()
|
|
|
|
// Create pods sequentially (back-to-back). e2eLags have been sorted.
|
|
batchlag, e2eLags := createBatchPodSequential(f, testPods)
|
|
|
|
// Log throughput data.
|
|
logPodCreateThroughput(batchlag, e2eLags, testArg.podsNr, testInfo)
|
|
|
|
return batchlag, e2eLags
|
|
}
|
|
|
|
// createBatchPodWithRateControl creates a batch of pods concurrently, uses one goroutine for each creation.
|
|
// between creations there is an interval for throughput control
|
|
func createBatchPodWithRateControl(f *framework.Framework, pods []*v1.Pod, interval time.Duration) map[string]metav1.Time {
|
|
createTimes := make(map[string]metav1.Time)
|
|
for _, pod := range pods {
|
|
createTimes[pod.ObjectMeta.Name] = metav1.Now()
|
|
go f.PodClient().Create(pod)
|
|
time.Sleep(interval)
|
|
}
|
|
return createTimes
|
|
}
|
|
|
|
// getPodStartLatency gets prometheus metric 'pod start latency' from kubelet
|
|
func getPodStartLatency(node string) (framework.KubeletLatencyMetrics, error) {
|
|
latencyMetrics := framework.KubeletLatencyMetrics{}
|
|
ms, err := metrics.GrabKubeletMetricsWithoutProxy(node)
|
|
Expect(err).NotTo(HaveOccurred())
|
|
|
|
for _, samples := range ms {
|
|
for _, sample := range samples {
|
|
if sample.Metric["__name__"] == kubemetrics.KubeletSubsystem+"_"+kubemetrics.PodStartLatencyKey {
|
|
quantile, _ := strconv.ParseFloat(string(sample.Metric["quantile"]), 64)
|
|
latencyMetrics = append(latencyMetrics,
|
|
framework.KubeletLatencyMetric{
|
|
Quantile: quantile,
|
|
Method: kubemetrics.PodStartLatencyKey,
|
|
Latency: time.Duration(int(sample.Value)) * time.Microsecond})
|
|
}
|
|
}
|
|
}
|
|
return latencyMetrics, nil
|
|
}
|
|
|
|
// verifyPodStartupLatency verifies whether 50, 90 and 99th percentiles of PodStartupLatency are
|
|
// within the threshold.
|
|
func verifyPodStartupLatency(expect, actual framework.LatencyMetric) error {
|
|
if actual.Perc50 > expect.Perc50 {
|
|
return fmt.Errorf("too high pod startup latency 50th percentile: %v", actual.Perc50)
|
|
}
|
|
if actual.Perc90 > expect.Perc90 {
|
|
return fmt.Errorf("too high pod startup latency 90th percentile: %v", actual.Perc90)
|
|
}
|
|
if actual.Perc99 > expect.Perc99 {
|
|
return fmt.Errorf("too high pod startup latency 99th percentile: %v", actual.Perc99)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// newInformerWatchPod creates an informer to check whether all pods are running.
|
|
func newInformerWatchPod(f *framework.Framework, mutex *sync.Mutex, watchTimes map[string]metav1.Time, podType string) cache.Controller {
|
|
ns := f.Namespace.Name
|
|
checkPodRunning := func(p *v1.Pod) {
|
|
mutex.Lock()
|
|
defer mutex.Unlock()
|
|
defer GinkgoRecover()
|
|
|
|
if p.Status.Phase == v1.PodRunning {
|
|
if _, found := watchTimes[p.Name]; !found {
|
|
watchTimes[p.Name] = metav1.Now()
|
|
}
|
|
}
|
|
}
|
|
|
|
_, controller := cache.NewInformer(
|
|
&cache.ListWatch{
|
|
ListFunc: func(options v1.ListOptions) (runtime.Object, error) {
|
|
options.LabelSelector = labels.SelectorFromSet(labels.Set{"type": podType}).String()
|
|
obj, err := f.ClientSet.Core().Pods(ns).List(options)
|
|
return runtime.Object(obj), err
|
|
},
|
|
WatchFunc: func(options v1.ListOptions) (watch.Interface, error) {
|
|
options.LabelSelector = labels.SelectorFromSet(labels.Set{"type": podType}).String()
|
|
return f.ClientSet.Core().Pods(ns).Watch(options)
|
|
},
|
|
},
|
|
&v1.Pod{},
|
|
0,
|
|
cache.ResourceEventHandlerFuncs{
|
|
AddFunc: func(obj interface{}) {
|
|
p, ok := obj.(*v1.Pod)
|
|
Expect(ok).To(Equal(true))
|
|
go checkPodRunning(p)
|
|
},
|
|
UpdateFunc: func(oldObj, newObj interface{}) {
|
|
p, ok := newObj.(*v1.Pod)
|
|
Expect(ok).To(Equal(true))
|
|
go checkPodRunning(p)
|
|
},
|
|
},
|
|
)
|
|
return controller
|
|
}
|
|
|
|
// createBatchPodSequential creats pods back-to-back in sequence.
|
|
func createBatchPodSequential(f *framework.Framework, pods []*v1.Pod) (time.Duration, []framework.PodLatencyData) {
|
|
batchStartTime := metav1.Now()
|
|
e2eLags := make([]framework.PodLatencyData, 0)
|
|
for _, pod := range pods {
|
|
create := metav1.Now()
|
|
f.PodClient().CreateSync(pod)
|
|
e2eLags = append(e2eLags,
|
|
framework.PodLatencyData{Name: pod.Name, Latency: metav1.Now().Time.Sub(create.Time)})
|
|
}
|
|
batchLag := metav1.Now().Time.Sub(batchStartTime.Time)
|
|
sort.Sort(framework.LatencySlice(e2eLags))
|
|
return batchLag, e2eLags
|
|
}
|
|
|
|
// logAndVerifyLatency verifies that whether pod creation latency satisfies the limit.
|
|
func logAndVerifyLatency(batchLag time.Duration, e2eLags []framework.PodLatencyData, podStartupLimits framework.LatencyMetric,
|
|
podBatchStartupLimit time.Duration, testInfo map[string]string, isVerify bool) {
|
|
framework.PrintLatencies(e2eLags, "worst client e2e total latencies")
|
|
|
|
// TODO(coufon): do not trust 'kubelet' metrics since they are not reset!
|
|
latencyMetrics, _ := getPodStartLatency(kubeletAddr)
|
|
framework.Logf("Kubelet Prometheus metrics (not reset):\n%s", framework.PrettyPrintJSON(latencyMetrics))
|
|
|
|
podCreateLatency := framework.PodStartupLatency{Latency: framework.ExtractLatencyMetrics(e2eLags)}
|
|
|
|
// log latency perf data
|
|
framework.PrintPerfData(getLatencyPerfData(podCreateLatency.Latency, testInfo))
|
|
|
|
if isVerify {
|
|
// check whether e2e pod startup time is acceptable.
|
|
framework.ExpectNoError(verifyPodStartupLatency(podStartupLimits, podCreateLatency.Latency))
|
|
|
|
// check bactch pod creation latency
|
|
if podBatchStartupLimit > 0 {
|
|
Expect(batchLag <= podBatchStartupLimit).To(Equal(true), "Batch creation startup time %v exceed limit %v",
|
|
batchLag, podBatchStartupLimit)
|
|
}
|
|
}
|
|
}
|
|
|
|
// logThroughput calculates and logs pod creation throughput.
|
|
func logPodCreateThroughput(batchLag time.Duration, e2eLags []framework.PodLatencyData, podsNr int, testInfo map[string]string) {
|
|
framework.PrintPerfData(getThroughputPerfData(batchLag, e2eLags, podsNr, testInfo))
|
|
}
|
|
|
|
// increaseKubeletAPIQPSLimit sets Kubelet API QPS via ConfigMap. Kubelet will restart with the new QPS.
|
|
func setKubeletAPIQPSLimit(f *framework.Framework, newAPIQPS int32) {
|
|
const restartGap = 40 * time.Second
|
|
|
|
resp := pollConfigz(2*time.Minute, 5*time.Second)
|
|
kubeCfg, err := decodeConfigz(resp)
|
|
framework.ExpectNoError(err)
|
|
framework.Logf("Old QPS limit is: %d\n", kubeCfg.KubeAPIQPS)
|
|
|
|
// Set new API QPS limit
|
|
kubeCfg.KubeAPIQPS = newAPIQPS
|
|
// TODO(coufon): createConfigMap should firstly check whether configmap already exists, if so, use updateConfigMap.
|
|
// Calling createConfigMap twice will result in error. It is fine for benchmark test because we only run one test on a new node.
|
|
_, err = createConfigMap(f, kubeCfg)
|
|
framework.ExpectNoError(err)
|
|
|
|
// Wait for Kubelet to restart
|
|
time.Sleep(restartGap)
|
|
|
|
// Check new QPS has been set
|
|
resp = pollConfigz(2*time.Minute, 5*time.Second)
|
|
kubeCfg, err = decodeConfigz(resp)
|
|
framework.ExpectNoError(err)
|
|
framework.Logf("New QPS limit is: %d\n", kubeCfg.KubeAPIQPS)
|
|
|
|
// TODO(coufon): check test result to see if we need to retry here
|
|
if kubeCfg.KubeAPIQPS != newAPIQPS {
|
|
framework.Failf("Fail to set new kubelet API QPS limit.")
|
|
}
|
|
}
|