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ba383bcfeb
pkg/util/intstr is a cleaner encapsulation for this type and supporting functions. No behavioral change.
323 lines
11 KiB
Go
323 lines
11 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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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 e2e
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import (
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"fmt"
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"strconv"
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"time"
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"k8s.io/kubernetes/pkg/api"
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client "k8s.io/kubernetes/pkg/client/unversioned"
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"k8s.io/kubernetes/pkg/util/intstr"
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. "github.com/onsi/ginkgo"
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)
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const (
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dynamicConsumptionTimeInSeconds = 30
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staticConsumptionTimeInSeconds = 3600
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dynamicRequestSizeInMillicores = 100
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dynamicRequestSizeInMegabytes = 100
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port = 80
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targetPort = 8080
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timeoutRC = 120 * time.Second
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startServiceTimeout = time.Minute
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startServiceInterval = 5 * time.Second
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resourceConsumerImage = "gcr.io/google_containers/resource_consumer:beta"
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rcIsNil = "ERROR: replicationController = nil"
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deploymentIsNil = "ERROR: deployment = nil"
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invalidKind = "ERROR: invalid workload kind for resource consumer"
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)
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/*
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ResourceConsumer is a tool for testing. It helps create specified usage of CPU or memory (Warning: memory not supported)
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typical use case:
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rc.ConsumeCPU(600)
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// ... check your assumption here
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rc.ConsumeCPU(300)
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// ... check your assumption here
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*/
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type ResourceConsumer struct {
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name string
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kind string
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framework *Framework
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cpu chan int
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mem chan int
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stopCPU chan int
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stopMem chan int
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consumptionTimeInSeconds int
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sleepTime time.Duration
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requestSizeInMillicores int
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requestSizeInMegabytes int
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}
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func NewDynamicResourceConsumer(name, kind string, replicas, initCPUTotal, initMemoryTotal int, cpuLimit, memLimit int64, framework *Framework) *ResourceConsumer {
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return newResourceConsumer(name, kind, replicas, initCPUTotal, initMemoryTotal, dynamicConsumptionTimeInSeconds, dynamicRequestSizeInMillicores, dynamicRequestSizeInMegabytes, cpuLimit, memLimit, framework)
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}
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// TODO this still defaults to replication controller
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func NewStaticResourceConsumer(name string, replicas, initCPUTotal, initMemoryTotal int, cpuLimit, memLimit int64, framework *Framework) *ResourceConsumer {
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return newResourceConsumer(name, kindRC, replicas, initCPUTotal, initMemoryTotal, staticConsumptionTimeInSeconds, initCPUTotal/replicas, initMemoryTotal/replicas, cpuLimit, memLimit, framework)
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}
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/*
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NewResourceConsumer creates new ResourceConsumer
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initCPUTotal argument is in millicores
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initMemoryTotal argument is in megabytes
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memLimit argument is in megabytes, memLimit is a maximum amount of memory that can be consumed by a single pod
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cpuLimit argument is in millicores, cpuLimit is a maximum amount of cpu that can be consumed by a single pod
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*/
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func newResourceConsumer(name, kind string, replicas, initCPUTotal, initMemoryTotal, consumptionTimeInSeconds, requestSizeInMillicores, requestSizeInMegabytes int, cpuLimit, memLimit int64, framework *Framework) *ResourceConsumer {
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runServiceAndWorkloadForResourceConsumer(framework.Client, framework.Namespace.Name, name, kind, replicas, cpuLimit, memLimit)
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rc := &ResourceConsumer{
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name: name,
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kind: kind,
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framework: framework,
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cpu: make(chan int),
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mem: make(chan int),
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stopCPU: make(chan int),
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stopMem: make(chan int),
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consumptionTimeInSeconds: consumptionTimeInSeconds,
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sleepTime: time.Duration(consumptionTimeInSeconds) * time.Second,
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requestSizeInMillicores: requestSizeInMillicores,
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requestSizeInMegabytes: requestSizeInMegabytes,
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}
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go rc.makeConsumeCPURequests()
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rc.ConsumeCPU(initCPUTotal)
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go rc.makeConsumeMemRequests()
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rc.ConsumeMem(initMemoryTotal)
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return rc
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}
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// ConsumeCPU consumes given number of CPU
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func (rc *ResourceConsumer) ConsumeCPU(millicores int) {
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Logf("RC %s: consume %v millicores in total", rc.name, millicores)
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rc.cpu <- millicores
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}
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// ConsumeMem consumes given number of Mem
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func (rc *ResourceConsumer) ConsumeMem(megabytes int) {
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Logf("RC %s: consume %v MB in total", rc.name, megabytes)
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rc.mem <- megabytes
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}
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func (rc *ResourceConsumer) makeConsumeCPURequests() {
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defer GinkgoRecover()
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var count int
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var rest int
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sleepTime := time.Duration(0)
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for {
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select {
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case millicores := <-rc.cpu:
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Logf("RC %s: consume %v millicores in total", rc.name, millicores)
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if rc.requestSizeInMillicores != 0 {
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count = millicores / rc.requestSizeInMillicores
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}
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rest = millicores - count*rc.requestSizeInMillicores
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case <-time.After(sleepTime):
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Logf("RC %s: sending %v requests to consume %v millicores each and 1 request to consume %v millicores", rc.name, count, rc.requestSizeInMillicores, rest)
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if count > 0 {
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rc.sendConsumeCPURequests(count, rc.requestSizeInMillicores, rc.consumptionTimeInSeconds)
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}
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if rest > 0 {
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go rc.sendOneConsumeCPURequest(rest, rc.consumptionTimeInSeconds)
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}
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sleepTime = rc.sleepTime
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case <-rc.stopCPU:
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return
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}
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}
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}
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func (rc *ResourceConsumer) makeConsumeMemRequests() {
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defer GinkgoRecover()
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var count int
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var rest int
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sleepTime := time.Duration(0)
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for {
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select {
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case megabytes := <-rc.mem:
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Logf("RC %s: consume %v MB in total", rc.name, megabytes)
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if rc.requestSizeInMegabytes != 0 {
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count = megabytes / rc.requestSizeInMegabytes
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}
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rest = megabytes - count*rc.requestSizeInMegabytes
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case <-time.After(sleepTime):
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Logf("RC %s: sending %v requests to consume %v MB each and 1 request to consume %v MB", rc.name, count, rc.requestSizeInMegabytes, rest)
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if count > 0 {
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rc.sendConsumeMemRequests(count, rc.requestSizeInMegabytes, rc.consumptionTimeInSeconds)
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}
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if rest > 0 {
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go rc.sendOneConsumeMemRequest(rest, rc.consumptionTimeInSeconds)
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}
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sleepTime = rc.sleepTime
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case <-rc.stopMem:
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return
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}
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}
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}
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func (rc *ResourceConsumer) sendConsumeCPURequests(requests, millicores, durationSec int) {
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for i := 0; i < requests; i++ {
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go rc.sendOneConsumeCPURequest(millicores, durationSec)
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}
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}
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func (rc *ResourceConsumer) sendConsumeMemRequests(requests, megabytes, durationSec int) {
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for i := 0; i < requests; i++ {
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go rc.sendOneConsumeMemRequest(megabytes, durationSec)
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}
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}
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// sendOneConsumeCPURequest sends POST request for cpu consumption
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func (rc *ResourceConsumer) sendOneConsumeCPURequest(millicores int, durationSec int) {
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defer GinkgoRecover()
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_, err := rc.framework.Client.Post().
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Prefix("proxy").
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Namespace(rc.framework.Namespace.Name).
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Resource("services").
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Name(rc.name).
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Suffix("ConsumeCPU").
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Param("millicores", strconv.Itoa(millicores)).
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Param("durationSec", strconv.Itoa(durationSec)).
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DoRaw()
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expectNoError(err)
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}
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// sendOneConsumeMemRequest sends POST request for memory consumption
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func (rc *ResourceConsumer) sendOneConsumeMemRequest(megabytes int, durationSec int) {
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defer GinkgoRecover()
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_, err := rc.framework.Client.Post().
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Prefix("proxy").
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Namespace(rc.framework.Namespace.Name).
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Resource("services").
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Name(rc.name).
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Suffix("ConsumeMem").
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Param("megabytes", strconv.Itoa(megabytes)).
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Param("durationSec", strconv.Itoa(durationSec)).
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DoRaw()
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expectNoError(err)
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}
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func (rc *ResourceConsumer) GetReplicas() int {
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switch rc.kind {
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case kindRC:
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replicationController, err := rc.framework.Client.ReplicationControllers(rc.framework.Namespace.Name).Get(rc.name)
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expectNoError(err)
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if replicationController == nil {
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Failf(rcIsNil)
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}
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return replicationController.Status.Replicas
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case kindDeployment:
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deployment, err := rc.framework.Client.Deployments(rc.framework.Namespace.Name).Get(rc.name)
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expectNoError(err)
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if deployment == nil {
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Failf(deploymentIsNil)
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}
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return deployment.Status.Replicas
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default:
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Failf(invalidKind)
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}
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return 0
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}
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func (rc *ResourceConsumer) WaitForReplicas(desiredReplicas int) {
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timeout := 10 * time.Minute
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for start := time.Now(); time.Since(start) < timeout; time.Sleep(20 * time.Second) {
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if desiredReplicas == rc.GetReplicas() {
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Logf("%s: current replicas number is equal to desired replicas number: %d", rc.kind, desiredReplicas)
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return
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} else {
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Logf("%s: current replicas number %d waiting to be %d", rc.kind, rc.GetReplicas(), desiredReplicas)
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}
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}
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Failf("timeout waiting %v for pods size to be %d", timeout, desiredReplicas)
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}
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func (rc *ResourceConsumer) EnsureDesiredReplicas(desiredReplicas int, timeout time.Duration) {
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for start := time.Now(); time.Since(start) < timeout; time.Sleep(10 * time.Second) {
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actual := rc.GetReplicas()
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if desiredReplicas != actual {
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Failf("Number of replicas has changed: expected %v, got %v", desiredReplicas, actual)
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}
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Logf("Number of replicas is as expected")
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}
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Logf("Number of replicas was stable over %v", timeout)
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}
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func (rc *ResourceConsumer) CleanUp() {
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By(fmt.Sprintf("Removing consuming RC %s", rc.name))
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rc.stopCPU <- 0
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rc.stopMem <- 0
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// Wait some time to ensure all child goroutines are finished.
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time.Sleep(10 * time.Second)
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expectNoError(DeleteRC(rc.framework.Client, rc.framework.Namespace.Name, rc.name))
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expectNoError(rc.framework.Client.Services(rc.framework.Namespace.Name).Delete(rc.name))
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}
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func runServiceAndWorkloadForResourceConsumer(c *client.Client, ns, name, kind string, replicas int, cpuLimitMillis, memLimitMb int64) {
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By(fmt.Sprintf("Running consuming RC %s via %s with %v replicas", name, kind, replicas))
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_, err := c.Services(ns).Create(&api.Service{
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ObjectMeta: api.ObjectMeta{
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Name: name,
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},
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Spec: api.ServiceSpec{
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Ports: []api.ServicePort{{
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Port: port,
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TargetPort: intstr.FromInt(targetPort),
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}},
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Selector: map[string]string{
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"name": name,
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},
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},
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})
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expectNoError(err)
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rcConfig := RCConfig{
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Client: c,
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Image: resourceConsumerImage,
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Name: name,
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Namespace: ns,
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Timeout: timeoutRC,
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Replicas: replicas,
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CpuRequest: cpuLimitMillis,
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CpuLimit: cpuLimitMillis,
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MemRequest: memLimitMb * 1024 * 1024, // MemLimit is in bytes
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MemLimit: memLimitMb * 1024 * 1024,
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}
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switch kind {
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case kindRC:
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expectNoError(RunRC(rcConfig))
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break
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case kindDeployment:
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dpConfig := DeploymentConfig{
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rcConfig,
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}
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expectNoError(RunDeployment(dpConfig))
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break
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default:
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Failf(invalidKind)
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}
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// Make sure endpoints are propagated.
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// TODO(piosz): replace sleep with endpoints watch.
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time.Sleep(10 * time.Second)
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}
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