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646 lines
18 KiB
646 lines
18 KiB
// Copyright 2013 The Prometheus 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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//
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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 scrape
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import (
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"crypto/tls"
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"crypto/x509"
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"fmt"
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"net/http"
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"net/http/httptest"
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"net/url"
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"os"
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"strconv"
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"strings"
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"testing"
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"time"
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config_util "github.com/prometheus/common/config"
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"github.com/prometheus/common/model"
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"github.com/stretchr/testify/require"
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"github.com/prometheus/prometheus/config"
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"github.com/prometheus/prometheus/discovery/targetgroup"
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"github.com/prometheus/prometheus/model/histogram"
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"github.com/prometheus/prometheus/model/labels"
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)
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const (
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caCertPath = "testdata/ca.cer"
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)
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func TestTargetLabels(t *testing.T) {
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target := newTestTarget("example.com:80", 0, labels.FromStrings("job", "some_job", "foo", "bar"))
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want := labels.FromStrings(model.JobLabel, "some_job", "foo", "bar")
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b := labels.NewScratchBuilder(0)
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got := target.Labels(&b)
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require.Equal(t, want, got)
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i := 0
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target.LabelsRange(func(l labels.Label) {
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switch i {
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case 0:
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require.Equal(t, labels.Label{Name: "foo", Value: "bar"}, l)
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case 1:
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require.Equal(t, labels.Label{Name: model.JobLabel, Value: "some_job"}, l)
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}
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i++
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})
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require.Equal(t, 2, i)
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}
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func TestTargetOffset(t *testing.T) {
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interval := 10 * time.Second
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offsetSeed := uint64(0)
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offsets := make([]time.Duration, 10000)
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// Calculate offsets for 10000 different targets.
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for i := range offsets {
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target := newTestTarget("example.com:80", 0, labels.FromStrings(
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"label", strconv.Itoa(i),
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))
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offsets[i] = target.offset(interval, offsetSeed)
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}
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// Put the offsets into buckets and validate that they are all
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// within bounds.
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bucketSize := 1 * time.Second
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buckets := make([]int, interval/bucketSize)
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for _, offset := range offsets {
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require.InDelta(t, time.Duration(0), offset, float64(interval), "Offset %v out of bounds.", offset)
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bucket := offset / bucketSize
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buckets[bucket]++
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}
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t.Log(buckets)
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// Calculate whether the number of targets per bucket
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// does not differ more than a given tolerance.
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avg := len(offsets) / len(buckets)
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tolerance := 0.15
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for _, bucket := range buckets {
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diff := bucket - avg
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if diff < 0 {
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diff = -diff
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}
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require.LessOrEqual(t, float64(diff)/float64(avg), tolerance, "Bucket out of tolerance bounds.")
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}
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}
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func TestTargetURL(t *testing.T) {
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params := url.Values{
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"abc": []string{"foo", "bar", "baz"},
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"xyz": []string{"hoo"},
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}
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labels := labels.FromMap(map[string]string{
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model.AddressLabel: "example.com:1234",
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model.SchemeLabel: "https",
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model.MetricsPathLabel: "/metricz",
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"__param_abc": "overwrite",
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"__param_cde": "huu",
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})
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target := NewTarget(labels, labels, params)
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// The reserved labels are concatenated into a full URL. The first value for each
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// URL query parameter can be set/modified via labels as well.
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expectedParams := url.Values{
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"abc": []string{"overwrite", "bar", "baz"},
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"cde": []string{"huu"},
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"xyz": []string{"hoo"},
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}
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expectedURL := &url.URL{
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Scheme: "https",
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Host: "example.com:1234",
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Path: "/metricz",
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RawQuery: expectedParams.Encode(),
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}
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require.Equal(t, expectedURL, target.URL())
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}
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func newTestTarget(targetURL string, _ time.Duration, lbls labels.Labels) *Target {
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lb := labels.NewBuilder(lbls)
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lb.Set(model.SchemeLabel, "http")
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lb.Set(model.AddressLabel, strings.TrimPrefix(targetURL, "http://"))
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lb.Set(model.MetricsPathLabel, "/metrics")
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return &Target{labels: lb.Labels()}
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}
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func TestNewHTTPBearerToken(t *testing.T) {
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server := httptest.NewServer(
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http.HandlerFunc(
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func(w http.ResponseWriter, r *http.Request) {
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expected := "Bearer 1234"
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received := r.Header.Get("Authorization")
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require.Equal(t, expected, received, "Authorization header was not set correctly.")
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},
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),
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)
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defer server.Close()
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cfg := config_util.HTTPClientConfig{
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BearerToken: "1234",
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}
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c, err := config_util.NewClientFromConfig(cfg, "test")
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require.NoError(t, err)
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_, err = c.Get(server.URL)
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require.NoError(t, err)
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}
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func TestNewHTTPBearerTokenFile(t *testing.T) {
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server := httptest.NewServer(
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http.HandlerFunc(
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func(w http.ResponseWriter, r *http.Request) {
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expected := "Bearer 12345"
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received := r.Header.Get("Authorization")
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require.Equal(t, expected, received, "Authorization header was not set correctly.")
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},
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),
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)
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defer server.Close()
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cfg := config_util.HTTPClientConfig{
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BearerTokenFile: "testdata/bearertoken.txt",
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}
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c, err := config_util.NewClientFromConfig(cfg, "test")
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require.NoError(t, err)
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_, err = c.Get(server.URL)
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require.NoError(t, err)
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}
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func TestNewHTTPBasicAuth(t *testing.T) {
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server := httptest.NewServer(
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http.HandlerFunc(
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func(w http.ResponseWriter, r *http.Request) {
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username, password, ok := r.BasicAuth()
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require.True(t, ok, "Basic authorization header was not set correctly.")
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require.Equal(t, "user", username)
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require.Equal(t, "password123", password)
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},
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),
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)
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defer server.Close()
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cfg := config_util.HTTPClientConfig{
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BasicAuth: &config_util.BasicAuth{
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Username: "user",
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Password: "password123",
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},
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}
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c, err := config_util.NewClientFromConfig(cfg, "test")
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require.NoError(t, err)
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_, err = c.Get(server.URL)
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require.NoError(t, err)
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}
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func TestNewHTTPCACert(t *testing.T) {
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server := httptest.NewUnstartedServer(
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http.HandlerFunc(
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func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", `text/plain; version=0.0.4`)
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w.Write([]byte{})
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},
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),
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)
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server.TLS = newTLSConfig("server", t)
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server.StartTLS()
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defer server.Close()
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cfg := config_util.HTTPClientConfig{
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TLSConfig: config_util.TLSConfig{
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CAFile: caCertPath,
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},
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}
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c, err := config_util.NewClientFromConfig(cfg, "test")
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require.NoError(t, err)
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_, err = c.Get(server.URL)
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require.NoError(t, err)
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}
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func TestNewHTTPClientCert(t *testing.T) {
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server := httptest.NewUnstartedServer(
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http.HandlerFunc(
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func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", `text/plain; version=0.0.4`)
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w.Write([]byte{})
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},
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),
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)
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tlsConfig := newTLSConfig("server", t)
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tlsConfig.ClientAuth = tls.RequireAndVerifyClientCert
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tlsConfig.ClientCAs = tlsConfig.RootCAs
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server.TLS = tlsConfig
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server.StartTLS()
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defer server.Close()
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cfg := config_util.HTTPClientConfig{
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TLSConfig: config_util.TLSConfig{
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CAFile: caCertPath,
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CertFile: "testdata/client.cer",
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KeyFile: "testdata/client.key",
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},
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}
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c, err := config_util.NewClientFromConfig(cfg, "test")
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require.NoError(t, err)
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_, err = c.Get(server.URL)
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require.NoError(t, err)
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}
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func TestNewHTTPWithServerName(t *testing.T) {
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server := httptest.NewUnstartedServer(
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http.HandlerFunc(
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func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", `text/plain; version=0.0.4`)
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w.Write([]byte{})
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},
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),
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)
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server.TLS = newTLSConfig("servername", t)
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server.StartTLS()
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defer server.Close()
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cfg := config_util.HTTPClientConfig{
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TLSConfig: config_util.TLSConfig{
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CAFile: caCertPath,
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ServerName: "prometheus.rocks",
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},
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}
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c, err := config_util.NewClientFromConfig(cfg, "test")
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require.NoError(t, err)
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_, err = c.Get(server.URL)
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require.NoError(t, err)
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}
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func TestNewHTTPWithBadServerName(t *testing.T) {
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server := httptest.NewUnstartedServer(
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http.HandlerFunc(
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func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", `text/plain; version=0.0.4`)
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w.Write([]byte{})
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},
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),
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)
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server.TLS = newTLSConfig("servername", t)
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server.StartTLS()
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defer server.Close()
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cfg := config_util.HTTPClientConfig{
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TLSConfig: config_util.TLSConfig{
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CAFile: caCertPath,
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ServerName: "badname",
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},
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}
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c, err := config_util.NewClientFromConfig(cfg, "test")
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require.NoError(t, err)
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_, err = c.Get(server.URL)
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require.Error(t, err)
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}
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func newTLSConfig(certName string, t *testing.T) *tls.Config {
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tlsConfig := &tls.Config{}
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caCertPool := x509.NewCertPool()
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caCert, err := os.ReadFile(caCertPath)
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require.NoError(t, err, "Couldn't read CA cert.")
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caCertPool.AppendCertsFromPEM(caCert)
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tlsConfig.RootCAs = caCertPool
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tlsConfig.ServerName = "127.0.0.1"
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certPath := fmt.Sprintf("testdata/%s.cer", certName)
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keyPath := fmt.Sprintf("testdata/%s.key", certName)
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cert, err := tls.LoadX509KeyPair(certPath, keyPath)
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require.NoError(t, err, "Unable to use specified server cert (%s) & key (%v).", certPath, keyPath)
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tlsConfig.Certificates = []tls.Certificate{cert}
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return tlsConfig
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}
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func TestNewClientWithBadTLSConfig(t *testing.T) {
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cfg := config_util.HTTPClientConfig{
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TLSConfig: config_util.TLSConfig{
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CAFile: "testdata/nonexistent_ca.cer",
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CertFile: "testdata/nonexistent_client.cer",
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KeyFile: "testdata/nonexistent_client.key",
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},
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}
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_, err := config_util.NewClientFromConfig(cfg, "test")
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require.Error(t, err)
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}
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func TestTargetsFromGroup(t *testing.T) {
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expectedError := "instance 0 in group : no address"
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cfg := config.ScrapeConfig{
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ScrapeTimeout: model.Duration(10 * time.Second),
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ScrapeInterval: model.Duration(1 * time.Minute),
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}
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lb := labels.NewBuilder(labels.EmptyLabels())
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targets, failures := TargetsFromGroup(&targetgroup.Group{Targets: []model.LabelSet{{}, {model.AddressLabel: "localhost:9090"}}}, &cfg, nil, lb)
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require.Len(t, targets, 1)
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require.Len(t, failures, 1)
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require.EqualError(t, failures[0], expectedError)
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}
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func BenchmarkTargetsFromGroup(b *testing.B) {
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// Simulate Kubernetes service-discovery and use subset of rules from typical Prometheus config.
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cfgText := `
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scrape_configs:
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- job_name: job1
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scrape_interval: 15s
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scrape_timeout: 10s
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relabel_configs:
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- source_labels: [__meta_kubernetes_pod_container_port_name]
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separator: ;
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regex: .*-metrics
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replacement: $1
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action: keep
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- source_labels: [__meta_kubernetes_pod_phase]
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separator: ;
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regex: Succeeded|Failed
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replacement: $1
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action: drop
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- source_labels: [__meta_kubernetes_namespace, __meta_kubernetes_pod_label_name]
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separator: /
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regex: (.*)
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target_label: job
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replacement: $1
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action: replace
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- source_labels: [__meta_kubernetes_namespace]
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separator: ;
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regex: (.*)
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target_label: namespace
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replacement: $1
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action: replace
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- source_labels: [__meta_kubernetes_pod_name]
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separator: ;
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regex: (.*)
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target_label: pod
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replacement: $1
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action: replace
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- source_labels: [__meta_kubernetes_pod_container_name]
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separator: ;
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regex: (.*)
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target_label: container
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replacement: $1
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action: replace
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- source_labels: [__meta_kubernetes_pod_name, __meta_kubernetes_pod_container_name,
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__meta_kubernetes_pod_container_port_name]
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separator: ':'
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regex: (.*)
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target_label: instance
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replacement: $1
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action: replace
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- separator: ;
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regex: (.*)
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target_label: cluster
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replacement: dev-us-central-0
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action: replace
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`
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config := loadConfiguration(b, cfgText)
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for _, nTargets := range []int{1, 10, 100} {
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b.Run(fmt.Sprintf("%d_targets", nTargets), func(b *testing.B) {
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targets := []model.LabelSet{}
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for i := 0; i < nTargets; i++ {
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labels := model.LabelSet{
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model.AddressLabel: model.LabelValue(fmt.Sprintf("localhost:%d", i)),
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"__meta_kubernetes_namespace": "some_namespace",
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"__meta_kubernetes_pod_container_name": "some_container",
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"__meta_kubernetes_pod_container_port_name": "http-metrics",
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"__meta_kubernetes_pod_container_port_number": "80",
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"__meta_kubernetes_pod_label_name": "some_name",
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"__meta_kubernetes_pod_name": "some_pod",
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"__meta_kubernetes_pod_phase": "Running",
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}
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// Add some more labels, because Kubernetes SD generates a lot
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for i := 0; i < 10; i++ {
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labels[model.LabelName(fmt.Sprintf("__meta_kubernetes_pod_label_extra%d", i))] = "a_label_abcdefgh"
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labels[model.LabelName(fmt.Sprintf("__meta_kubernetes_pod_labelpresent_extra%d", i))] = "true"
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}
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targets = append(targets, labels)
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}
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var tgets []*Target
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lb := labels.NewBuilder(labels.EmptyLabels())
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group := &targetgroup.Group{Targets: targets}
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for i := 0; i < b.N; i++ {
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tgets, _ = TargetsFromGroup(group, config.ScrapeConfigs[0], tgets, lb)
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if len(targets) != nTargets {
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b.Fatalf("Expected %d targets, got %d", nTargets, len(targets))
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}
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}
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})
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}
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}
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func TestBucketLimitAppender(t *testing.T) {
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example := histogram.Histogram{
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Schema: 0,
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Count: 21,
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Sum: 33,
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ZeroThreshold: 0.001,
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ZeroCount: 3,
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PositiveSpans: []histogram.Span{
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{Offset: 0, Length: 3},
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},
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PositiveBuckets: []int64{3, 0, 0},
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NegativeSpans: []histogram.Span{
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{Offset: 0, Length: 3},
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},
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NegativeBuckets: []int64{3, 0, 0},
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}
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bigGap := histogram.Histogram{
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Schema: 0,
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Count: 21,
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Sum: 33,
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ZeroThreshold: 0.001,
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ZeroCount: 3,
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PositiveSpans: []histogram.Span{
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{Offset: 1, Length: 1}, // in (1, 2]
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{Offset: 2, Length: 1}, // in (8, 16]
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},
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PositiveBuckets: []int64{1, 0}, // 1, 1
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}
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customBuckets := histogram.Histogram{
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Schema: histogram.CustomBucketsSchema,
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Count: 9,
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Sum: 33,
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PositiveSpans: []histogram.Span{
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{Offset: 0, Length: 3},
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},
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PositiveBuckets: []int64{3, 0, 0},
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CustomValues: []float64{1, 2, 3},
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}
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cases := []struct {
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h histogram.Histogram
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limit int
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expectError bool
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expectBucketCount int
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expectSchema int32
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}{
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{
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h: example,
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limit: 3,
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expectError: true,
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},
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{
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h: example,
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limit: 4,
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expectError: false,
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expectBucketCount: 4,
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expectSchema: -1,
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},
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{
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h: example,
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limit: 10,
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expectError: false,
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expectBucketCount: 6,
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expectSchema: 0,
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},
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{
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h: bigGap,
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limit: 1,
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expectError: false,
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expectBucketCount: 1,
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|
expectSchema: -2,
|
|
},
|
|
{
|
|
h: customBuckets,
|
|
limit: 2,
|
|
expectError: true,
|
|
},
|
|
{
|
|
h: customBuckets,
|
|
limit: 3,
|
|
expectError: false,
|
|
expectBucketCount: 3,
|
|
expectSchema: histogram.CustomBucketsSchema,
|
|
},
|
|
}
|
|
|
|
resApp := &collectResultAppender{}
|
|
|
|
for _, c := range cases {
|
|
for _, floatHisto := range []bool{true, false} {
|
|
t.Run(fmt.Sprintf("floatHistogram=%t", floatHisto), func(t *testing.T) {
|
|
app := &bucketLimitAppender{Appender: resApp, limit: c.limit}
|
|
ts := int64(10 * time.Minute / time.Millisecond)
|
|
lbls := labels.FromStrings("__name__", "sparse_histogram_series")
|
|
var err error
|
|
if floatHisto {
|
|
fh := c.h.Copy().ToFloat(nil)
|
|
_, err = app.AppendHistogram(0, lbls, ts, nil, fh)
|
|
if c.expectError {
|
|
require.Error(t, err)
|
|
} else {
|
|
require.Equal(t, c.expectSchema, fh.Schema)
|
|
require.Equal(t, c.expectBucketCount, len(fh.NegativeBuckets)+len(fh.PositiveBuckets))
|
|
require.NoError(t, err)
|
|
}
|
|
} else {
|
|
h := c.h.Copy()
|
|
_, err = app.AppendHistogram(0, lbls, ts, h, nil)
|
|
if c.expectError {
|
|
require.Error(t, err)
|
|
} else {
|
|
require.Equal(t, c.expectSchema, h.Schema)
|
|
require.Equal(t, c.expectBucketCount, len(h.NegativeBuckets)+len(h.PositiveBuckets))
|
|
require.NoError(t, err)
|
|
}
|
|
}
|
|
require.NoError(t, app.Commit())
|
|
})
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestMaxSchemaAppender(t *testing.T) {
|
|
example := histogram.Histogram{
|
|
Schema: 0,
|
|
Count: 21,
|
|
Sum: 33,
|
|
ZeroThreshold: 0.001,
|
|
ZeroCount: 3,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 3},
|
|
},
|
|
PositiveBuckets: []int64{3, 0, 0},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: 0, Length: 3},
|
|
},
|
|
NegativeBuckets: []int64{3, 0, 0},
|
|
}
|
|
|
|
customBuckets := histogram.Histogram{
|
|
Schema: histogram.CustomBucketsSchema,
|
|
Count: 9,
|
|
Sum: 33,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 3},
|
|
},
|
|
PositiveBuckets: []int64{3, 0, 0},
|
|
CustomValues: []float64{1, 2, 3},
|
|
}
|
|
|
|
cases := []struct {
|
|
h histogram.Histogram
|
|
maxSchema int32
|
|
expectSchema int32
|
|
}{
|
|
{
|
|
h: example,
|
|
maxSchema: -1,
|
|
expectSchema: -1,
|
|
},
|
|
{
|
|
h: example,
|
|
maxSchema: 0,
|
|
expectSchema: 0,
|
|
},
|
|
{
|
|
h: customBuckets,
|
|
maxSchema: -1,
|
|
expectSchema: histogram.CustomBucketsSchema,
|
|
},
|
|
}
|
|
|
|
resApp := &collectResultAppender{}
|
|
|
|
for _, c := range cases {
|
|
for _, floatHisto := range []bool{true, false} {
|
|
t.Run(fmt.Sprintf("floatHistogram=%t", floatHisto), func(t *testing.T) {
|
|
app := &maxSchemaAppender{Appender: resApp, maxSchema: c.maxSchema}
|
|
ts := int64(10 * time.Minute / time.Millisecond)
|
|
lbls := labels.FromStrings("__name__", "sparse_histogram_series")
|
|
var err error
|
|
if floatHisto {
|
|
fh := c.h.Copy().ToFloat(nil)
|
|
_, err = app.AppendHistogram(0, lbls, ts, nil, fh)
|
|
require.Equal(t, c.expectSchema, fh.Schema)
|
|
require.NoError(t, err)
|
|
} else {
|
|
h := c.h.Copy()
|
|
_, err = app.AppendHistogram(0, lbls, ts, h, nil)
|
|
require.Equal(t, c.expectSchema, h.Schema)
|
|
require.NoError(t, err)
|
|
}
|
|
require.NoError(t, app.Commit())
|
|
})
|
|
}
|
|
}
|
|
}
|