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prometheus.go
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prometheus.go
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package prometheus
import (
"bytes"
"encoding/json"
"fmt"
"strconv"
"strings"
"time"
g "github.com/onsi/ginkgo"
o "github.com/onsi/gomega"
dto "github.com/prometheus/client_model/go"
"github.com/prometheus/common/expfmt"
"k8s.io/api/core/v1"
extensions "k8s.io/api/extensions/v1beta1"
kapierrs "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/watch"
clientset "k8s.io/client-go/kubernetes"
kapi "k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/client/conditions"
e2e "k8s.io/kubernetes/test/e2e/framework"
exutil "github.com/openshift/origin/test/extended/util"
)
var _ = g.Describe("[Feature:Prometheus][Conformance] Prometheus", func() {
defer g.GinkgoRecover()
var (
oc = exutil.NewCLI("prometheus", exutil.KubeConfigPath())
execPodName, ns, host, bearerToken string
statsPort int
)
g.BeforeEach(func() {
ns, host, bearerToken, statsPort = bringUpPrometheusFromTemplate(oc)
})
g.Describe("when installed to the cluster", func() {
g.It("should start and expose a secured proxy and unsecured metrics", func() {
execPodName = e2e.CreateExecPodOrFail(oc.AdminKubeClient(), ns, "execpod", func(pod *v1.Pod) {
pod.Spec.Containers[0].Image = "centos:7"
})
defer func() { oc.AdminKubeClient().Core().Pods(ns).Delete(execPodName, metav1.NewDeleteOptions(1)) }()
g.By("checking the unsecured metrics path")
success := false
var metrics map[string]*dto.MetricFamily
for i := 0; i < 30; i++ {
results, err := getInsecureURLViaPod(ns, execPodName, fmt.Sprintf("https://%s:%d/metrics", host, statsPort))
if err != nil {
e2e.Logf("unable to get unsecured metrics: %v", err)
continue
}
p := expfmt.TextParser{}
metrics, err = p.TextToMetricFamilies(bytes.NewBufferString(results))
o.Expect(err).NotTo(o.HaveOccurred())
counts := findCountersWithLabels(metrics["tsdb_samples_appended_total"], labels{})
if len(counts) != 0 && counts[0] > 0 {
success = true
break
}
counts = findCountersWithLabels(metrics["tsdb_head_samples_appended_total"], labels{})
if len(counts) != 0 && counts[0] > 0 {
success = true
break
}
time.Sleep(time.Second)
continue
}
o.Expect(success).To(o.BeTrue(), fmt.Sprintf("Did not find tsdb_samples_appended_total or tsdb_head_samples_appended_total in:\n%#v,", metrics))
g.By("verifying the oauth-proxy reports a 403 on the root URL")
err := expectURLStatusCodeExec(ns, execPodName, fmt.Sprintf("https://%s:%d", host, statsPort), 403)
o.Expect(err).NotTo(o.HaveOccurred())
g.By("verifying a service account token is able to authenticate")
err = expectBearerTokenURLStatusCodeExec(ns, execPodName, fmt.Sprintf("https://%s:%d/graph", host, statsPort), bearerToken, 200)
o.Expect(err).NotTo(o.HaveOccurred())
g.By("verifying a service account token is able to access the Prometheus API")
// expect all endpoints within 60 seconds
var lastErrs []error
for i := 0; i < 60; i++ {
contents, err := getBearerTokenURLViaPod(ns, execPodName, fmt.Sprintf("https://%s:%d/api/v1/targets", host, statsPort), bearerToken)
o.Expect(err).NotTo(o.HaveOccurred())
targets := &prometheusTargets{}
err = json.Unmarshal([]byte(contents), targets)
o.Expect(err).NotTo(o.HaveOccurred())
g.By("verifying all expected jobs have a working target")
lastErrs = all(
targets.Expect(labels{"job": "kubernetes-apiservers"}, "up", "^https://.*/metrics$"),
targets.Expect(labels{"job": "kubernetes-service-endpoints", "kubernetes_name": "prometheus", "kubernetes_namespace": "kube-system", "name": "prometheus"}, "up", "^https://.*/metrics$"),
targets.Expect(labels{"job": "kubernetes-nodes"}, "up", "^https://.*/metrics$"),
targets.Expect(labels{"job": "kubernetes-cadvisor"}, "up", "^https://.*/metrics/cadvisor$"),
)
if len(lastErrs) == 0 {
break
}
time.Sleep(time.Second)
}
o.Expect(lastErrs).To(o.BeEmpty())
})
})
})
func all(errs ...error) []error {
var result []error
for _, err := range errs {
if err != nil {
result = append(result, err)
}
}
return result
}
type prometheusTargets struct {
Data struct {
ActiveTargets []struct {
Labels map[string]string
Health string
ScrapeUrl string
}
}
Status string
}
func (t *prometheusTargets) Expect(l labels, health, scrapeURLPattern string) error {
for _, target := range t.Data.ActiveTargets {
match := true
for k, v := range l {
if target.Labels[k] != v {
match = false
break
}
}
if !match {
continue
}
if health != target.Health {
continue
}
o.Expect(target.ScrapeUrl).To(o.MatchRegexp(scrapeURLPattern))
return nil
}
return fmt.Errorf("no match for %v with health %s", l, health)
}
type labels map[string]string
func (l labels) With(name, value string) labels {
n := make(labels)
for k, v := range l {
n[k] = v
}
n[name] = value
return n
}
func findEnvVar(vars []kapi.EnvVar, key string) string {
for _, v := range vars {
if v.Name == key {
return v.Value
}
}
return ""
}
func findMetricsWithLabels(f *dto.MetricFamily, labels map[string]string) []*dto.Metric {
var result []*dto.Metric
if f == nil {
return result
}
for _, m := range f.Metric {
matched := map[string]struct{}{}
for _, l := range m.Label {
if expect, ok := labels[l.GetName()]; ok {
if expect != l.GetValue() {
break
}
matched[l.GetName()] = struct{}{}
}
}
if len(matched) != len(labels) {
continue
}
result = append(result, m)
}
return result
}
func findCountersWithLabels(f *dto.MetricFamily, labels map[string]string) []float64 {
var result []float64
for _, m := range findMetricsWithLabels(f, labels) {
result = append(result, m.Counter.GetValue())
}
return result
}
func findGaugesWithLabels(f *dto.MetricFamily, labels map[string]string) []float64 {
var result []float64
for _, m := range findMetricsWithLabels(f, labels) {
result = append(result, m.Gauge.GetValue())
}
return result
}
func findMetricLabels(f *dto.MetricFamily, labels map[string]string, match string) []string {
var result []string
for _, m := range findMetricsWithLabels(f, labels) {
for _, l := range m.Label {
if l.GetName() == match {
result = append(result, l.GetValue())
break
}
}
}
return result
}
func expectURLStatusCodeExec(ns, execPodName, url string, statusCode int) error {
cmd := fmt.Sprintf("curl -k -s -o /dev/null -w '%%{http_code}' %q", url)
output, err := e2e.RunHostCmd(ns, execPodName, cmd)
if err != nil {
return fmt.Errorf("host command failed: %v\n%s", err, output)
}
if output != strconv.Itoa(statusCode) {
return fmt.Errorf("last response from server was not %d: %s", statusCode, output)
}
return nil
}
func expectBearerTokenURLStatusCodeExec(ns, execPodName, url, bearer string, statusCode int) error {
cmd := fmt.Sprintf("curl -k -s -H 'Authorization: Bearer %s' -o /dev/null -w '%%{http_code}' %q", bearer, url)
output, err := e2e.RunHostCmd(ns, execPodName, cmd)
if err != nil {
return fmt.Errorf("host command failed: %v\n%s", err, output)
}
if output != strconv.Itoa(statusCode) {
return fmt.Errorf("last response from server was not %d: %s", statusCode, output)
}
return nil
}
func getBearerTokenURLViaPod(ns, execPodName, url, bearer string) (string, error) {
cmd := fmt.Sprintf("curl -s -k -H 'Authorization: Bearer %s' %q", bearer, url)
output, err := e2e.RunHostCmd(ns, execPodName, cmd)
if err != nil {
return "", fmt.Errorf("host command failed: %v\n%s", err, output)
}
return output, nil
}
func getAuthenticatedURLViaPod(ns, execPodName, url, user, pass string) (string, error) {
cmd := fmt.Sprintf("curl -s -u %s:%s %q", user, pass, url)
output, err := e2e.RunHostCmd(ns, execPodName, cmd)
if err != nil {
return "", fmt.Errorf("host command failed: %v\n%s", err, output)
}
return output, nil
}
func getInsecureURLViaPod(ns, execPodName, url string) (string, error) {
cmd := fmt.Sprintf("curl -s -k %q", url)
output, err := e2e.RunHostCmd(ns, execPodName, cmd)
if err != nil {
return "", fmt.Errorf("host command failed: %v\n%s", err, output)
}
return output, nil
}
func waitForServiceAccountInNamespace(c clientset.Interface, ns, serviceAccountName string, timeout time.Duration) error {
w, err := c.Core().ServiceAccounts(ns).Watch(metav1.SingleObject(metav1.ObjectMeta{Name: serviceAccountName}))
if err != nil {
return err
}
_, err = watch.Until(timeout, w, conditions.ServiceAccountHasSecrets)
return err
}
func bringUpPrometheusFromTemplate(oc *exutil.CLI) (ns, host, bearerToken string, statsPort int) {
ns = oc.KubeFramework().Namespace.Name
host = "prometheus.kube-system.svc"
statsPort = 443
mustCreate := false
if _, err := oc.AdminKubeClient().Apps().StatefulSets("kube-system").Get("prometheus", metav1.GetOptions{}); err != nil {
if !kapierrs.IsNotFound(err) {
o.Expect(err).NotTo(o.HaveOccurred())
}
mustCreate = true
}
if mustCreate {
e2e.Logf("Installing Prometheus onto the cluster for testing")
configPath := exutil.FixturePath("..", "..", "examples", "prometheus", "prometheus.yaml")
stdout, _, err := oc.WithoutNamespace().Run("process").Args("-f", configPath).Outputs()
o.Expect(err).NotTo(o.HaveOccurred())
err = oc.WithoutNamespace().AsAdmin().Run("create").Args("-f", "-").InputString(stdout).Execute()
o.Expect(err).NotTo(o.HaveOccurred())
e2e.WaitForDeploymentStatus(oc.AdminKubeClient(), &extensions.Deployment{ObjectMeta: metav1.ObjectMeta{Name: "prometheus", Namespace: "kube-system"}})
}
waitForServiceAccountInNamespace(oc.AdminKubeClient(), "kube-system", "prometheus", 2*time.Minute)
secrets, err := oc.AdminKubeClient().Core().Secrets("kube-system").List(metav1.ListOptions{})
o.Expect(err).NotTo(o.HaveOccurred())
for _, secret := range secrets.Items {
if secret.Type != v1.SecretTypeServiceAccountToken {
continue
}
if !strings.HasPrefix(secret.Name, "prometheus-") {
continue
}
bearerToken = string(secret.Data[v1.ServiceAccountTokenKey])
break
}
o.Expect(bearerToken).ToNot(o.BeEmpty())
return
}