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/*
Copyright 2016 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 main
import (
"flag"
"fmt"
"log"
"net/http"
"net/url"
"strconv"
"sync"
. "k8s.io/kubernetes/test/images/resource-consumer/common"
)
var port = flag.Int("port", 8080, "Port number.")
var consumerPort = flag.Int("consumer-port", 8080, "Port number of consumers.")
var consumerServiceName = flag.String("consumer-service-name", "resource-consumer", "Name of service containing resource consumers.")
var consumerServiceNamespace = flag.String("consumer-service-namespace", "default", "Namespace of service containing resource consumers.")
func main() {
flag.Parse()
mgr := NewController()
log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", *port), mgr))
}
type Controller struct {
responseWriterLock sync.Mutex
waitGroup sync.WaitGroup
}
func NewController() *Controller {
c := &Controller{}
return c
}
func (handler *Controller) ServeHTTP(w http.ResponseWriter, req *http.Request) {
if req.Method != "POST" {
http.Error(w, BadRequest, http.StatusBadRequest)
return
}
// parsing POST request data and URL data
if err := req.ParseForm(); err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
// handle consumeCPU
if req.URL.Path == ConsumeCPUAddress {
handler.handleConsumeCPU(w, req.Form)
return
}
// handle consumeMem
if req.URL.Path == ConsumeMemAddress {
handler.handleConsumeMem(w, req.Form)
return
}
// handle bumpMetric
if req.URL.Path == BumpMetricAddress {
handler.handleBumpMetric(w, req.Form)
return
}
http.Error(w, UnknownFunction, http.StatusNotFound)
}
func (handler *Controller) handleConsumeCPU(w http.ResponseWriter, query url.Values) {
// getting string data for consumeCPU
durationSecString := query.Get(DurationSecQuery)
millicoresString := query.Get(MillicoresQuery)
requestSizeInMillicoresString := query.Get(RequestSizeInMillicoresQuery)
if durationSecString == "" || millicoresString == "" || requestSizeInMillicoresString == "" {
http.Error(w, NotGivenFunctionArgument, http.StatusBadRequest)
return
}
// convert data (strings to ints) for consumeCPU
durationSec, durationSecError := strconv.Atoi(durationSecString)
millicores, millicoresError := strconv.Atoi(millicoresString)
requestSizeInMillicores, requestSizeInMillicoresError := strconv.Atoi(requestSizeInMillicoresString)
if durationSecError != nil || millicoresError != nil || requestSizeInMillicoresError != nil || requestSizeInMillicores <= 0 {
http.Error(w, IncorrectFunctionArgument, http.StatusBadRequest)
return
}
count := millicores / requestSizeInMillicores
rest := millicores - count*requestSizeInMillicores
fmt.Fprintf(w, "RC manager: sending %v requests to consume %v millicores each and 1 request to consume %v millicores\n", count, requestSizeInMillicores, rest)
if count > 0 {
handler.waitGroup.Add(count)
handler.sendConsumeCPURequests(w, count, requestSizeInMillicores, durationSec)
}
if rest > 0 {
handler.waitGroup.Add(1)
go handler.sendOneConsumeCPURequest(w, rest, durationSec)
}
handler.waitGroup.Wait()
}
func (handler *Controller) handleConsumeMem(w http.ResponseWriter, query url.Values) {
// getting string data for consumeMem
durationSecString := query.Get(DurationSecQuery)
megabytesString := query.Get(MegabytesQuery)
requestSizeInMegabytesString := query.Get(RequestSizeInMegabytesQuery)
if durationSecString == "" || megabytesString == "" || requestSizeInMegabytesString == "" {
http.Error(w, NotGivenFunctionArgument, http.StatusBadRequest)
return
}
// convert data (strings to ints) for consumeMem
durationSec, durationSecError := strconv.Atoi(durationSecString)
megabytes, megabytesError := strconv.Atoi(megabytesString)
requestSizeInMegabytes, requestSizeInMegabytesError := strconv.Atoi(requestSizeInMegabytesString)
if durationSecError != nil || megabytesError != nil || requestSizeInMegabytesError != nil || requestSizeInMegabytes <= 0 {
http.Error(w, IncorrectFunctionArgument, http.StatusBadRequest)
return
}
count := megabytes / requestSizeInMegabytes
rest := megabytes - count*requestSizeInMegabytes
fmt.Fprintf(w, "RC manager: sending %v requests to consume %v MB each and 1 request to consume %v MB\n", count, requestSizeInMegabytes, rest)
if count > 0 {
handler.waitGroup.Add(count)
handler.sendConsumeMemRequests(w, count, requestSizeInMegabytes, durationSec)
}
if rest > 0 {
handler.waitGroup.Add(1)
go handler.sendOneConsumeMemRequest(w, rest, durationSec)
}
handler.waitGroup.Wait()
}
func (handler *Controller) handleBumpMetric(w http.ResponseWriter, query url.Values) {
// getting string data for handleBumpMetric
metric := query.Get(MetricNameQuery)
deltaString := query.Get(DeltaQuery)
durationSecString := query.Get(DurationSecQuery)
requestSizeCustomMetricString := query.Get(RequestSizeCustomMetricQuery)
if durationSecString == "" || metric == "" || deltaString == "" || requestSizeCustomMetricString == "" {
http.Error(w, NotGivenFunctionArgument, http.StatusBadRequest)
return
}
// convert data (strings to ints/floats) for handleBumpMetric
durationSec, durationSecError := strconv.Atoi(durationSecString)
delta, deltaError := strconv.Atoi(deltaString)
requestSizeCustomMetric, requestSizeCustomMetricError := strconv.Atoi(requestSizeCustomMetricString)
if durationSecError != nil || deltaError != nil || requestSizeCustomMetricError != nil || requestSizeCustomMetric <= 0 {
http.Error(w, IncorrectFunctionArgument, http.StatusBadRequest)
return
}
count := delta / requestSizeCustomMetric
rest := delta - count*requestSizeCustomMetric
fmt.Fprintf(w, "RC manager: sending %v requests to bump custom metric by %v each and 1 request to bump by %v\n", count, requestSizeCustomMetric, rest)
if count > 0 {
handler.waitGroup.Add(count)
handler.sendConsumeCustomMetric(w, metric, count, requestSizeCustomMetric, durationSec)
}
if rest > 0 {
handler.waitGroup.Add(1)
go handler.sendOneConsumeCustomMetric(w, metric, rest, durationSec)
}
handler.waitGroup.Wait()
}
func (manager *Controller) sendConsumeCPURequests(w http.ResponseWriter, requests, millicores, durationSec int) {
for i := 0; i < requests; i++ {
go manager.sendOneConsumeCPURequest(w, millicores, durationSec)
}
}
func (manager *Controller) sendConsumeMemRequests(w http.ResponseWriter, requests, megabytes, durationSec int) {
for i := 0; i < requests; i++ {
go manager.sendOneConsumeMemRequest(w, megabytes, durationSec)
}
}
func (manager *Controller) sendConsumeCustomMetric(w http.ResponseWriter, metric string, requests, delta, durationSec int) {
for i := 0; i < requests; i++ {
go manager.sendOneConsumeCustomMetric(w, metric, delta, durationSec)
}
}
func createConsumerURL(suffix string) string {
return fmt.Sprintf("http://%s.%s.svc.cluster.local:%d%s", *consumerServiceName, *consumerServiceNamespace, *consumerPort, suffix)
}
// sendOneConsumeCPURequest sends POST request for cpu consumption
func (c *Controller) sendOneConsumeCPURequest(w http.ResponseWriter, millicores int, durationSec int) {
defer c.waitGroup.Done()
query := createConsumerURL(ConsumeCPUAddress)
_, err := http.PostForm(query, url.Values{MillicoresQuery: {strconv.Itoa(millicores)}, DurationSecQuery: {strconv.Itoa(durationSec)}})
c.responseWriterLock.Lock()
defer c.responseWriterLock.Unlock()
if err != nil {
fmt.Fprintf(w, "Failed to connect to consumer: %v\n", err)
return
}
fmt.Fprintf(w, "Consumed %d millicores\n", millicores)
}
// sendOneConsumeMemRequest sends POST request for memory consumption
func (c *Controller) sendOneConsumeMemRequest(w http.ResponseWriter, megabytes int, durationSec int) {
defer c.waitGroup.Done()
query := createConsumerURL(ConsumeMemAddress)
_, err := http.PostForm(query, url.Values{MegabytesQuery: {strconv.Itoa(megabytes)}, DurationSecQuery: {strconv.Itoa(durationSec)}})
c.responseWriterLock.Lock()
defer c.responseWriterLock.Unlock()
if err != nil {
fmt.Fprintf(w, "Failed to connect to consumer: %v\n", err)
return
}
fmt.Fprintf(w, "Consumed %d megabytes\n", megabytes)
}
// sendOneConsumeCustomMetric sends POST request for custom metric consumption
func (c *Controller) sendOneConsumeCustomMetric(w http.ResponseWriter, customMetricName string, delta int, durationSec int) {
defer c.waitGroup.Done()
query := createConsumerURL(BumpMetricAddress)
_, err := http.PostForm(query,
url.Values{MetricNameQuery: {customMetricName}, DurationSecQuery: {strconv.Itoa(durationSec)}, DeltaQuery: {strconv.Itoa(delta)}})
c.responseWriterLock.Lock()
defer c.responseWriterLock.Unlock()
if err != nil {
fmt.Fprintf(w, "Failed to connect to consumer: %v\n", err)
return
}
fmt.Fprintf(w, "Bumped metric %s by %d\n", customMetricName, delta)
}
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