119 lines
3.0 KiB
Go
119 lines
3.0 KiB
Go
// Copyright 2019 The prometheus-operator Authors
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package e2e
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import (
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"log"
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"os"
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"testing"
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"time"
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"github.com/pkg/errors"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/client-go/kubernetes"
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"k8s.io/client-go/tools/clientcmd"
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)
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var promClient *prometheusClient
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func TestMain(m *testing.M) {
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os.Exit(testMain(m))
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}
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// testMain circumvents the issue, that one can not call `defer` in TestMain, as
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// `os.Exit` does not honor `defer` statements. For more details see:
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// http://blog.englund.nu/golang,/testing/2017/03/12/using-defer-in-testmain.html
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func testMain(m *testing.M) int {
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kubeConfigPath, ok := os.LookupEnv("KUBECONFIG")
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if !ok {
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log.Fatal("failed to retrieve KUBECONFIG env var")
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}
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config, err := clientcmd.BuildConfigFromFlags("", kubeConfigPath)
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if err != nil {
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log.Fatal(err)
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}
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kubeClient, err := kubernetes.NewForConfig(config)
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if err != nil {
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log.Fatal(errors.Wrap(err, "creating kubeClient failed"))
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}
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promClient = newPrometheusClient(kubeClient)
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return m.Run()
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}
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func TestQueryPrometheus(t *testing.T) {
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t.Parallel()
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queries := []struct {
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query string
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expectN int
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}{
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{
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// query: `up{job="node-exporter"} == 1`,
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// expectN: 1,
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// }, {
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// query: `up{job="kubelet"} == 1`,
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// expectN: 1,
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// }, {
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query: `up{job="apiserver"} == 1`,
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expectN: 1,
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// }, {
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// query: `up{job="kube-state-metrics"} == 1`,
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// expectN: 1,
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}, {
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query: `up{job="prometheus-k8s"} == 1`,
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expectN: 1,
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}, {
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query: `up{job="prometheus-operator"} == 1`,
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expectN: 1,
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}, {
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query: `up{job="alertmanager-main"} == 1`,
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expectN: 2,
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},
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}
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// Wait for pod to respond at queries at all. Then start verifying their results.
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err := wait.Poll(5*time.Second, 1*time.Minute, func() (bool, error) {
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_, err := promClient.query("up")
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return err == nil, nil
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})
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if err != nil {
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t.Fatal(errors.Wrap(err, "wait for prometheus-k8s"))
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}
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err = wait.Poll(5*time.Second, 1*time.Minute, func() (bool, error) {
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defer t.Log("---------------------------\n")
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for _, q := range queries {
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n, err := promClient.query(q.query)
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if err != nil {
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return false, err
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}
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if n < q.expectN {
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// Don't return an error as targets may only become visible after a while.
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t.Logf("expected at least %d results for %q but got %d", q.expectN, q.query, n)
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return false, nil
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}
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t.Logf("query %q succeeded", q.query)
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}
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return true, nil
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})
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if err != nil {
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t.Fatal(err)
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}
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}
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