115 lines
3.4 KiB
Go
115 lines
3.4 KiB
Go
/*
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Copyright 2020 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 annotations
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import (
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"fmt"
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"strconv"
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"strings"
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"github.com/onsi/ginkgo"
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"github.com/stretchr/testify/assert"
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"k8s.io/ingress-nginx/test/e2e/framework"
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)
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var _ = framework.DescribeAnnotation("Annotation - limit-connections", func() {
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f := framework.NewDefaultFramework("limit-connections")
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ginkgo.BeforeEach(func() {
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f.NewSlowEchoDeployment()
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})
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ginkgo.It("should limit-connections", func() {
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host := "limit-connections"
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ing := framework.NewSingleIngress(host, "/", host, f.Namespace, framework.SlowEchoService, 80, nil)
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f.EnsureIngress(ing)
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f.WaitForNginxServer(host, func(server string) bool {
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return strings.Contains(server, fmt.Sprintf("server_name %s ;", host))
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})
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// prerequisite
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configKey := "variables-hash-bucket-size"
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configValue := "256"
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f.UpdateNginxConfigMapData(configKey, configValue)
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f.WaitForNginxConfiguration(func(server string) bool {
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return strings.Contains(server, fmt.Sprintf("variables_hash_bucket_size %s;", configValue))
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})
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// limit connections
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annotations := make(map[string]string)
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connectionLimit := 8
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annotations["nginx.ingress.kubernetes.io/limit-connections"] = strconv.Itoa(connectionLimit)
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ing.SetAnnotations(annotations)
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f.UpdateIngress(ing)
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f.WaitForNginxConfiguration(func(server string) bool {
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return strings.Contains(server, "limit_conn") && strings.Contains(server, fmt.Sprintf("conn %v;", connectionLimit))
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})
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type asyncResult struct {
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index int
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status int
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}
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response := make(chan *asyncResult)
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maxRequestNumber := 20
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for currentRequestNumber := 0; currentRequestNumber < maxRequestNumber; currentRequestNumber++ {
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go func(requestNumber int, responeChannel chan *asyncResult) {
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resp := f.HTTPTestClient().
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GET("/sleep/10").
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WithHeader("Host", host).
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Expect().
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Raw()
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code := 0
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if resp != nil {
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code = resp.StatusCode
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}
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responeChannel <- &asyncResult{requestNumber, code}
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}(currentRequestNumber, response)
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}
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var results []asyncResult
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for {
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res := <-response
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results = append(results, *res)
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if len(results) >= maxRequestNumber {
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break
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}
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}
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close(response)
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okRequest := 0
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failedRequest := 0
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requestError := 0
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expectedFail := maxRequestNumber - connectionLimit
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for _, result := range results {
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if result.status == 200 {
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okRequest++
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} else if result.status == 503 {
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failedRequest++
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} else {
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requestError++
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}
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}
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assert.Equal(ginkgo.GinkgoT(), okRequest, connectionLimit, "expecting the ok (200) requests number should equal the connection limit")
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assert.Equal(ginkgo.GinkgoT(), failedRequest, expectedFail, "expecting the failed (503) requests number should equal the expected to fail request number")
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assert.Equal(ginkgo.GinkgoT(), requestError, 0, "expecting the failed (other than 503) requests number should equal zero")
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})
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})
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