mirror of
https://github.com/prometheus/prometheus.git
synced 2024-11-15 18:14:06 -08:00
199cfc1324
In digital communication, "jitter" usually refers to how much a signal deviates from true periodicity, see https://en.wikipedia.org/wiki/Jitter. The way we are using the "jitterSeed" in Prometheus does not affect the true periodicity at all, but just introduces a constant phase shift (or offset) within the period. So it would be more correct and less confusing to call the "jitterSeed" an "offsetSeed" instead. Signed-off-by: Julius Volz <julius.volz@gmail.com>
706 lines
20 KiB
Go
706 lines
20 KiB
Go
// 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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"context"
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"net/http"
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"strconv"
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"testing"
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"time"
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"github.com/prometheus/common/model"
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"github.com/stretchr/testify/require"
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"gopkg.in/yaml.v2"
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"github.com/prometheus/prometheus/config"
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"github.com/prometheus/prometheus/discovery"
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"github.com/prometheus/prometheus/discovery/targetgroup"
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"github.com/prometheus/prometheus/model/labels"
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"github.com/prometheus/prometheus/model/relabel"
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)
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func TestPopulateLabels(t *testing.T) {
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cases := []struct {
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in labels.Labels
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cfg *config.ScrapeConfig
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noDefaultPort bool
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res labels.Labels
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resOrig labels.Labels
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err string
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}{
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// Regular population of scrape config options.
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{
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in: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4:1000",
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"custom": "value",
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}),
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cfg: &config.ScrapeConfig{
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Scheme: "https",
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MetricsPath: "/metrics",
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JobName: "job",
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ScrapeInterval: model.Duration(time.Second),
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ScrapeTimeout: model.Duration(time.Second),
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},
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res: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4:1000",
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model.InstanceLabel: "1.2.3.4:1000",
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model.SchemeLabel: "https",
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model.MetricsPathLabel: "/metrics",
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model.JobLabel: "job",
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model.ScrapeIntervalLabel: "1s",
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model.ScrapeTimeoutLabel: "1s",
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"custom": "value",
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}),
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resOrig: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4:1000",
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model.SchemeLabel: "https",
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model.MetricsPathLabel: "/metrics",
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model.JobLabel: "job",
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"custom": "value",
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model.ScrapeIntervalLabel: "1s",
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model.ScrapeTimeoutLabel: "1s",
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}),
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},
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// Pre-define/overwrite scrape config labels.
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// Leave out port and expect it to be defaulted to scheme.
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{
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in: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4",
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model.SchemeLabel: "http",
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model.MetricsPathLabel: "/custom",
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model.JobLabel: "custom-job",
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model.ScrapeIntervalLabel: "2s",
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model.ScrapeTimeoutLabel: "2s",
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}),
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cfg: &config.ScrapeConfig{
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Scheme: "https",
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MetricsPath: "/metrics",
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JobName: "job",
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ScrapeInterval: model.Duration(time.Second),
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ScrapeTimeout: model.Duration(time.Second),
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},
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res: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4:80",
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model.InstanceLabel: "1.2.3.4:80",
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model.SchemeLabel: "http",
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model.MetricsPathLabel: "/custom",
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model.JobLabel: "custom-job",
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model.ScrapeIntervalLabel: "2s",
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model.ScrapeTimeoutLabel: "2s",
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}),
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resOrig: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4",
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model.SchemeLabel: "http",
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model.MetricsPathLabel: "/custom",
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model.JobLabel: "custom-job",
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model.ScrapeIntervalLabel: "2s",
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model.ScrapeTimeoutLabel: "2s",
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}),
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},
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// Provide instance label. HTTPS port default for IPv6.
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{
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in: labels.FromMap(map[string]string{
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model.AddressLabel: "[::1]",
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model.InstanceLabel: "custom-instance",
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}),
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cfg: &config.ScrapeConfig{
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Scheme: "https",
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MetricsPath: "/metrics",
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JobName: "job",
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ScrapeInterval: model.Duration(time.Second),
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ScrapeTimeout: model.Duration(time.Second),
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},
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res: labels.FromMap(map[string]string{
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model.AddressLabel: "[::1]:443",
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model.InstanceLabel: "custom-instance",
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model.SchemeLabel: "https",
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model.MetricsPathLabel: "/metrics",
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model.JobLabel: "job",
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model.ScrapeIntervalLabel: "1s",
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model.ScrapeTimeoutLabel: "1s",
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}),
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resOrig: labels.FromMap(map[string]string{
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model.AddressLabel: "[::1]",
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model.InstanceLabel: "custom-instance",
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model.SchemeLabel: "https",
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model.MetricsPathLabel: "/metrics",
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model.JobLabel: "job",
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model.ScrapeIntervalLabel: "1s",
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model.ScrapeTimeoutLabel: "1s",
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}),
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},
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// Address label missing.
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{
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in: labels.FromStrings("custom", "value"),
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cfg: &config.ScrapeConfig{
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Scheme: "https",
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MetricsPath: "/metrics",
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JobName: "job",
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ScrapeInterval: model.Duration(time.Second),
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ScrapeTimeout: model.Duration(time.Second),
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},
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res: labels.EmptyLabels(),
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resOrig: labels.EmptyLabels(),
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err: "no address",
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},
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// Address label missing, but added in relabelling.
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{
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in: labels.FromStrings("custom", "host:1234"),
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cfg: &config.ScrapeConfig{
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Scheme: "https",
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MetricsPath: "/metrics",
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JobName: "job",
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ScrapeInterval: model.Duration(time.Second),
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ScrapeTimeout: model.Duration(time.Second),
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RelabelConfigs: []*relabel.Config{
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{
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Action: relabel.Replace,
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Regex: relabel.MustNewRegexp("(.*)"),
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SourceLabels: model.LabelNames{"custom"},
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Replacement: "${1}",
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TargetLabel: string(model.AddressLabel),
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},
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},
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},
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res: labels.FromMap(map[string]string{
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model.AddressLabel: "host:1234",
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model.InstanceLabel: "host:1234",
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model.SchemeLabel: "https",
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model.MetricsPathLabel: "/metrics",
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model.JobLabel: "job",
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model.ScrapeIntervalLabel: "1s",
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model.ScrapeTimeoutLabel: "1s",
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"custom": "host:1234",
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}),
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resOrig: labels.FromMap(map[string]string{
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model.SchemeLabel: "https",
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model.MetricsPathLabel: "/metrics",
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model.JobLabel: "job",
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model.ScrapeIntervalLabel: "1s",
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model.ScrapeTimeoutLabel: "1s",
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"custom": "host:1234",
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}),
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},
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// Address label missing, but added in relabelling.
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{
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in: labels.FromStrings("custom", "host:1234"),
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cfg: &config.ScrapeConfig{
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Scheme: "https",
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MetricsPath: "/metrics",
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JobName: "job",
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ScrapeInterval: model.Duration(time.Second),
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ScrapeTimeout: model.Duration(time.Second),
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RelabelConfigs: []*relabel.Config{
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{
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Action: relabel.Replace,
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Regex: relabel.MustNewRegexp("(.*)"),
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SourceLabels: model.LabelNames{"custom"},
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Replacement: "${1}",
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TargetLabel: string(model.AddressLabel),
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},
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},
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},
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res: labels.FromMap(map[string]string{
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model.AddressLabel: "host:1234",
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model.InstanceLabel: "host:1234",
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model.SchemeLabel: "https",
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model.MetricsPathLabel: "/metrics",
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model.JobLabel: "job",
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model.ScrapeIntervalLabel: "1s",
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model.ScrapeTimeoutLabel: "1s",
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"custom": "host:1234",
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}),
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resOrig: labels.FromMap(map[string]string{
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model.SchemeLabel: "https",
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model.MetricsPathLabel: "/metrics",
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model.JobLabel: "job",
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model.ScrapeIntervalLabel: "1s",
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model.ScrapeTimeoutLabel: "1s",
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"custom": "host:1234",
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}),
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},
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// Invalid UTF-8 in label.
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{
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in: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4:1000",
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"custom": "\xbd",
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}),
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cfg: &config.ScrapeConfig{
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Scheme: "https",
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MetricsPath: "/metrics",
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JobName: "job",
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ScrapeInterval: model.Duration(time.Second),
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ScrapeTimeout: model.Duration(time.Second),
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},
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res: labels.EmptyLabels(),
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resOrig: labels.EmptyLabels(),
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err: "invalid label value for \"custom\": \"\\xbd\"",
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},
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// Invalid duration in interval label.
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{
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in: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4:1000",
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model.ScrapeIntervalLabel: "2notseconds",
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}),
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cfg: &config.ScrapeConfig{
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Scheme: "https",
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MetricsPath: "/metrics",
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JobName: "job",
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ScrapeInterval: model.Duration(time.Second),
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ScrapeTimeout: model.Duration(time.Second),
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},
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res: labels.EmptyLabels(),
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resOrig: labels.EmptyLabels(),
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err: "error parsing scrape interval: unknown unit \"notseconds\" in duration \"2notseconds\"",
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},
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// Invalid duration in timeout label.
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{
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in: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4:1000",
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model.ScrapeTimeoutLabel: "2notseconds",
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}),
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cfg: &config.ScrapeConfig{
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Scheme: "https",
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MetricsPath: "/metrics",
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JobName: "job",
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ScrapeInterval: model.Duration(time.Second),
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ScrapeTimeout: model.Duration(time.Second),
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},
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res: labels.EmptyLabels(),
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resOrig: labels.EmptyLabels(),
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err: "error parsing scrape timeout: unknown unit \"notseconds\" in duration \"2notseconds\"",
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},
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// 0 interval in timeout label.
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{
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in: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4:1000",
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model.ScrapeIntervalLabel: "0s",
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}),
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cfg: &config.ScrapeConfig{
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Scheme: "https",
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MetricsPath: "/metrics",
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JobName: "job",
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ScrapeInterval: model.Duration(time.Second),
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ScrapeTimeout: model.Duration(time.Second),
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},
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res: labels.EmptyLabels(),
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resOrig: labels.EmptyLabels(),
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err: "scrape interval cannot be 0",
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},
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// 0 duration in timeout label.
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{
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in: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4:1000",
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model.ScrapeTimeoutLabel: "0s",
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}),
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cfg: &config.ScrapeConfig{
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Scheme: "https",
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MetricsPath: "/metrics",
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JobName: "job",
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ScrapeInterval: model.Duration(time.Second),
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ScrapeTimeout: model.Duration(time.Second),
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},
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res: labels.EmptyLabels(),
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resOrig: labels.EmptyLabels(),
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err: "scrape timeout cannot be 0",
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},
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// Timeout less than interval.
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{
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in: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4:1000",
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model.ScrapeIntervalLabel: "1s",
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model.ScrapeTimeoutLabel: "2s",
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}),
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cfg: &config.ScrapeConfig{
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Scheme: "https",
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MetricsPath: "/metrics",
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JobName: "job",
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ScrapeInterval: model.Duration(time.Second),
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ScrapeTimeout: model.Duration(time.Second),
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},
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res: labels.EmptyLabels(),
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resOrig: labels.EmptyLabels(),
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err: "scrape timeout cannot be greater than scrape interval (\"2s\" > \"1s\")",
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},
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// Don't attach default port.
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{
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in: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4",
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}),
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cfg: &config.ScrapeConfig{
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Scheme: "https",
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MetricsPath: "/metrics",
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JobName: "job",
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ScrapeInterval: model.Duration(time.Second),
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ScrapeTimeout: model.Duration(time.Second),
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},
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noDefaultPort: true,
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res: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4",
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model.InstanceLabel: "1.2.3.4",
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model.SchemeLabel: "https",
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model.MetricsPathLabel: "/metrics",
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model.JobLabel: "job",
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model.ScrapeIntervalLabel: "1s",
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model.ScrapeTimeoutLabel: "1s",
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}),
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resOrig: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4",
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model.SchemeLabel: "https",
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model.MetricsPathLabel: "/metrics",
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model.JobLabel: "job",
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model.ScrapeIntervalLabel: "1s",
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model.ScrapeTimeoutLabel: "1s",
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}),
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},
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// Remove default port (http).
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{
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in: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4:80",
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}),
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cfg: &config.ScrapeConfig{
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Scheme: "http",
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MetricsPath: "/metrics",
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JobName: "job",
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ScrapeInterval: model.Duration(time.Second),
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ScrapeTimeout: model.Duration(time.Second),
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},
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noDefaultPort: true,
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res: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4",
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model.InstanceLabel: "1.2.3.4:80",
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model.SchemeLabel: "http",
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model.MetricsPathLabel: "/metrics",
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model.JobLabel: "job",
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model.ScrapeIntervalLabel: "1s",
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model.ScrapeTimeoutLabel: "1s",
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}),
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resOrig: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4:80",
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model.SchemeLabel: "http",
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model.MetricsPathLabel: "/metrics",
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model.JobLabel: "job",
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model.ScrapeIntervalLabel: "1s",
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model.ScrapeTimeoutLabel: "1s",
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}),
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},
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// Remove default port (https).
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{
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in: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4:443",
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}),
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cfg: &config.ScrapeConfig{
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Scheme: "https",
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MetricsPath: "/metrics",
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JobName: "job",
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ScrapeInterval: model.Duration(time.Second),
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ScrapeTimeout: model.Duration(time.Second),
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},
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noDefaultPort: true,
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res: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4",
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model.InstanceLabel: "1.2.3.4:443",
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model.SchemeLabel: "https",
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model.MetricsPathLabel: "/metrics",
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model.JobLabel: "job",
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model.ScrapeIntervalLabel: "1s",
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model.ScrapeTimeoutLabel: "1s",
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}),
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resOrig: labels.FromMap(map[string]string{
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model.AddressLabel: "1.2.3.4:443",
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model.SchemeLabel: "https",
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model.MetricsPathLabel: "/metrics",
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model.JobLabel: "job",
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model.ScrapeIntervalLabel: "1s",
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model.ScrapeTimeoutLabel: "1s",
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}),
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},
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}
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for _, c := range cases {
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in := c.in.Copy()
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res, orig, err := PopulateLabels(labels.NewBuilder(c.in), c.cfg, c.noDefaultPort)
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if c.err != "" {
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require.EqualError(t, err, c.err)
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} else {
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require.NoError(t, err)
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}
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require.Equal(t, c.in, in)
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require.Equal(t, c.res, res)
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require.Equal(t, c.resOrig, orig)
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}
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}
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func loadConfiguration(t testing.TB, c string) *config.Config {
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t.Helper()
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cfg := &config.Config{}
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if err := yaml.UnmarshalStrict([]byte(c), cfg); err != nil {
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t.Fatalf("Unable to load YAML config: %s", err)
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}
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return cfg
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}
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func noopLoop() loop {
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return &testLoop{
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startFunc: func(interval, timeout time.Duration, errc chan<- error) {},
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stopFunc: func() {},
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}
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}
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func TestManagerApplyConfig(t *testing.T) {
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// Valid initial configuration.
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cfgText1 := `
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scrape_configs:
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- job_name: job1
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static_configs:
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- targets: ["foo:9090"]
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`
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// Invalid configuration.
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cfgText2 := `
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scrape_configs:
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- job_name: job1
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scheme: https
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static_configs:
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- targets: ["foo:9090"]
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tls_config:
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ca_file: /not/existing/ca/file
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`
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// Valid configuration.
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cfgText3 := `
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scrape_configs:
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- job_name: job1
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scheme: https
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static_configs:
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- targets: ["foo:9090"]
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`
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var (
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cfg1 = loadConfiguration(t, cfgText1)
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cfg2 = loadConfiguration(t, cfgText2)
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cfg3 = loadConfiguration(t, cfgText3)
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ch = make(chan struct{}, 1)
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)
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opts := Options{}
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scrapeManager := NewManager(&opts, nil, nil)
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newLoop := func(scrapeLoopOptions) loop {
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ch <- struct{}{}
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return noopLoop()
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}
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sp := &scrapePool{
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appendable: &nopAppendable{},
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activeTargets: map[uint64]*Target{
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1: {},
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|
},
|
|
loops: map[uint64]loop{
|
|
1: noopLoop(),
|
|
},
|
|
newLoop: newLoop,
|
|
logger: nil,
|
|
config: cfg1.ScrapeConfigs[0],
|
|
client: http.DefaultClient,
|
|
}
|
|
scrapeManager.scrapePools = map[string]*scrapePool{
|
|
"job1": sp,
|
|
}
|
|
|
|
// Apply the initial configuration.
|
|
if err := scrapeManager.ApplyConfig(cfg1); err != nil {
|
|
t.Fatalf("unable to apply configuration: %s", err)
|
|
}
|
|
select {
|
|
case <-ch:
|
|
t.Fatal("reload happened")
|
|
default:
|
|
}
|
|
|
|
// Apply a configuration for which the reload fails.
|
|
if err := scrapeManager.ApplyConfig(cfg2); err == nil {
|
|
t.Fatalf("expecting error but got none")
|
|
}
|
|
select {
|
|
case <-ch:
|
|
t.Fatal("reload happened")
|
|
default:
|
|
}
|
|
|
|
// Apply a configuration for which the reload succeeds.
|
|
if err := scrapeManager.ApplyConfig(cfg3); err != nil {
|
|
t.Fatalf("unable to apply configuration: %s", err)
|
|
}
|
|
select {
|
|
case <-ch:
|
|
default:
|
|
t.Fatal("reload didn't happen")
|
|
}
|
|
|
|
// Re-applying the same configuration shouldn't trigger a reload.
|
|
if err := scrapeManager.ApplyConfig(cfg3); err != nil {
|
|
t.Fatalf("unable to apply configuration: %s", err)
|
|
}
|
|
select {
|
|
case <-ch:
|
|
t.Fatal("reload happened")
|
|
default:
|
|
}
|
|
}
|
|
|
|
func TestManagerTargetsUpdates(t *testing.T) {
|
|
opts := Options{}
|
|
m := NewManager(&opts, nil, nil)
|
|
|
|
ts := make(chan map[string][]*targetgroup.Group)
|
|
go m.Run(ts)
|
|
defer m.Stop()
|
|
|
|
tgSent := make(map[string][]*targetgroup.Group)
|
|
for x := 0; x < 10; x++ {
|
|
|
|
tgSent[strconv.Itoa(x)] = []*targetgroup.Group{
|
|
{
|
|
Source: strconv.Itoa(x),
|
|
},
|
|
}
|
|
|
|
select {
|
|
case ts <- tgSent:
|
|
case <-time.After(10 * time.Millisecond):
|
|
t.Error("Scrape manager's channel remained blocked after the set threshold.")
|
|
}
|
|
}
|
|
|
|
m.mtxScrape.Lock()
|
|
tsetActual := m.targetSets
|
|
m.mtxScrape.Unlock()
|
|
|
|
// Make sure all updates have been received.
|
|
require.Equal(t, tgSent, tsetActual)
|
|
|
|
select {
|
|
case <-m.triggerReload:
|
|
default:
|
|
t.Error("No scrape loops reload was triggered after targets update.")
|
|
}
|
|
}
|
|
|
|
func TestSetOffsetSeed(t *testing.T) {
|
|
getConfig := func(prometheus string) *config.Config {
|
|
cfgText := `
|
|
global:
|
|
external_labels:
|
|
prometheus: '` + prometheus + `'
|
|
`
|
|
|
|
cfg := &config.Config{}
|
|
if err := yaml.UnmarshalStrict([]byte(cfgText), cfg); err != nil {
|
|
t.Fatalf("Unable to load YAML config cfgYaml: %s", err)
|
|
}
|
|
|
|
return cfg
|
|
}
|
|
|
|
opts := Options{}
|
|
scrapeManager := NewManager(&opts, nil, nil)
|
|
|
|
// Load the first config.
|
|
cfg1 := getConfig("ha1")
|
|
if err := scrapeManager.setOffsetSeed(cfg1.GlobalConfig.ExternalLabels); err != nil {
|
|
t.Error(err)
|
|
}
|
|
offsetSeed1 := scrapeManager.offsetSeed
|
|
|
|
if offsetSeed1 == 0 {
|
|
t.Error("Offset seed has to be a hash of uint64")
|
|
}
|
|
|
|
// Load the first config.
|
|
cfg2 := getConfig("ha2")
|
|
if err := scrapeManager.setOffsetSeed(cfg2.GlobalConfig.ExternalLabels); err != nil {
|
|
t.Error(err)
|
|
}
|
|
offsetSeed2 := scrapeManager.offsetSeed
|
|
|
|
if offsetSeed1 == offsetSeed2 {
|
|
t.Error("Offset seed should not be the same on different set of external labels")
|
|
}
|
|
}
|
|
|
|
func TestManagerScrapePools(t *testing.T) {
|
|
cfgText1 := `
|
|
scrape_configs:
|
|
- job_name: job1
|
|
static_configs:
|
|
- targets: ["foo:9090"]
|
|
- job_name: job2
|
|
static_configs:
|
|
- targets: ["foo:9091", "foo:9092"]
|
|
`
|
|
cfgText2 := `
|
|
scrape_configs:
|
|
- job_name: job1
|
|
static_configs:
|
|
- targets: ["foo:9090", "foo:9094"]
|
|
- job_name: job3
|
|
static_configs:
|
|
- targets: ["foo:9093"]
|
|
`
|
|
var (
|
|
cfg1 = loadConfiguration(t, cfgText1)
|
|
cfg2 = loadConfiguration(t, cfgText2)
|
|
)
|
|
|
|
reload := func(scrapeManager *Manager, cfg *config.Config) {
|
|
newLoop := func(scrapeLoopOptions) loop {
|
|
return noopLoop()
|
|
}
|
|
scrapeManager.scrapePools = map[string]*scrapePool{}
|
|
for _, sc := range cfg.ScrapeConfigs {
|
|
_, cancel := context.WithCancel(context.Background())
|
|
defer cancel()
|
|
sp := &scrapePool{
|
|
appendable: &nopAppendable{},
|
|
activeTargets: map[uint64]*Target{},
|
|
loops: map[uint64]loop{
|
|
1: noopLoop(),
|
|
},
|
|
newLoop: newLoop,
|
|
logger: nil,
|
|
config: sc,
|
|
client: http.DefaultClient,
|
|
cancel: cancel,
|
|
}
|
|
for _, c := range sc.ServiceDiscoveryConfigs {
|
|
staticConfig := c.(discovery.StaticConfig)
|
|
for _, group := range staticConfig {
|
|
for i := range group.Targets {
|
|
sp.activeTargets[uint64(i)] = &Target{}
|
|
}
|
|
}
|
|
}
|
|
scrapeManager.scrapePools[sc.JobName] = sp
|
|
}
|
|
}
|
|
|
|
opts := Options{}
|
|
scrapeManager := NewManager(&opts, nil, nil)
|
|
|
|
reload(scrapeManager, cfg1)
|
|
require.ElementsMatch(t, []string{"job1", "job2"}, scrapeManager.ScrapePools())
|
|
|
|
reload(scrapeManager, cfg2)
|
|
require.ElementsMatch(t, []string{"job1", "job3"}, scrapeManager.ScrapePools())
|
|
}
|