158 lines
3.8 KiB
Go
158 lines
3.8 KiB
Go
/*
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Copyright 2016 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 healthcheck
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import (
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"fmt"
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"io/ioutil"
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"math/rand"
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"net/http"
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"testing"
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"time"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/apimachinery/pkg/util/sets"
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)
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type TestCaseData struct {
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nodePorts int
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numEndpoints int
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nodePortList []int
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svcNames []types.NamespacedName
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}
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const (
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startPort = 20000
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endPort = 40000
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)
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var (
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choices = []byte("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
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)
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func generateRandomString(n int) string {
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b := make([]byte, n)
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l := len(choices)
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for i := range b {
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b[i] = choices[rand.Intn(l)]
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}
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return string(b)
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}
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func chooseServiceName(tc int, hint int) types.NamespacedName {
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var svc types.NamespacedName
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svc.Namespace = fmt.Sprintf("ns_%d", tc)
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svc.Name = fmt.Sprintf("name_%d", hint)
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return svc
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}
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func generateEndpointSet(max int) sets.String {
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s := sets.NewString()
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for i := 0; i < max; i++ {
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s.Insert(fmt.Sprintf("%d%s", i, generateRandomString(8)))
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}
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return s
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}
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func verifyHealthChecks(tc *TestCaseData, t *testing.T) bool {
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var success = true
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time.Sleep(100 * time.Millisecond)
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for i := 0; i < tc.nodePorts; i++ {
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t.Logf("Validating HealthCheck works for svc %s nodePort %d\n", tc.svcNames[i], tc.nodePortList[i])
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res, err := http.Get(fmt.Sprintf("http://127.0.0.1:%d/", tc.nodePortList[i]))
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if err != nil {
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t.Logf("ERROR: Failed to connect to listening port")
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success = false
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continue
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}
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robots, err := ioutil.ReadAll(res.Body)
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if res.StatusCode == http.StatusServiceUnavailable {
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t.Logf("ERROR: HealthCheck returned %s: %s", res.Status, string(robots))
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success = false
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continue
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}
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res.Body.Close()
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if err != nil {
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t.Logf("Error: reading body of response (%s)", err)
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success = false
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continue
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}
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}
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if success {
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t.Logf("Success: All nodePorts found active")
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}
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return success
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}
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func TestHealthChecker(t *testing.T) {
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testcases := []TestCaseData{
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{
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nodePorts: 1,
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numEndpoints: 2,
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},
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{
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nodePorts: 10,
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numEndpoints: 6,
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},
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{
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nodePorts: 100,
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numEndpoints: 1,
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},
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}
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Run()
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ports := startPort
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for n, tc := range testcases {
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tc.nodePortList = make([]int, tc.nodePorts)
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tc.svcNames = make([]types.NamespacedName, tc.nodePorts)
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for i := 0; i < tc.nodePorts; i++ {
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tc.svcNames[i] = chooseServiceName(n, i)
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t.Logf("Updating endpoints map for %s %d", tc.svcNames[i], tc.numEndpoints)
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for {
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UpdateEndpoints(tc.svcNames[i], generateEndpointSet(tc.numEndpoints))
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tc.nodePortList[i] = ports
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ports++
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if AddServiceListener(tc.svcNames[i], tc.nodePortList[i]) {
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break
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}
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DeleteServiceListener(tc.svcNames[i], tc.nodePortList[i])
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// Keep searching for a port that works
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t.Logf("Failed to bind/listen on port %d...trying next port", ports-1)
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if ports > endPort {
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t.Errorf("Exhausted range of ports available for tests")
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return
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}
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}
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}
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t.Logf("Validating if all nodePorts for tc %d work", n)
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if !verifyHealthChecks(&tc, t) {
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t.Errorf("Healthcheck validation failed")
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}
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for i := 0; i < tc.nodePorts; i++ {
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DeleteServiceListener(tc.svcNames[i], tc.nodePortList[i])
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UpdateEndpoints(tc.svcNames[i], sets.NewString())
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}
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// Ensure that all listeners have been shutdown
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if verifyHealthChecks(&tc, t) {
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t.Errorf("Healthcheck validation failed")
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}
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}
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}
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