// Copyright 2013 The Prometheus Authors // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package scrape import ( "net/http" "strconv" "testing" "time" "github.com/prometheus/common/model" "github.com/stretchr/testify/require" yaml "gopkg.in/yaml.v2" "github.com/prometheus/prometheus/config" "github.com/prometheus/prometheus/discovery/targetgroup" "github.com/prometheus/prometheus/model/labels" "github.com/prometheus/prometheus/model/relabel" ) func TestPopulateLabels(t *testing.T) { cases := []struct { in labels.Labels cfg *config.ScrapeConfig res labels.Labels resOrig labels.Labels err string }{ // Regular population of scrape config options. { in: labels.FromMap(map[string]string{ model.AddressLabel: "1.2.3.4:1000", "custom": "value", }), cfg: &config.ScrapeConfig{ Scheme: "https", MetricsPath: "/metrics", JobName: "job", ScrapeInterval: model.Duration(time.Second), ScrapeTimeout: model.Duration(time.Second), }, res: labels.FromMap(map[string]string{ model.AddressLabel: "1.2.3.4:1000", model.InstanceLabel: "1.2.3.4:1000", model.SchemeLabel: "https", model.MetricsPathLabel: "/metrics", model.JobLabel: "job", model.ScrapeIntervalLabel: "1s", model.ScrapeTimeoutLabel: "1s", "custom": "value", }), resOrig: labels.FromMap(map[string]string{ model.AddressLabel: "1.2.3.4:1000", model.SchemeLabel: "https", model.MetricsPathLabel: "/metrics", model.JobLabel: "job", "custom": "value", model.ScrapeIntervalLabel: "1s", model.ScrapeTimeoutLabel: "1s", }), }, // Pre-define/overwrite scrape config labels. // Leave out port and expect it to be defaulted to scheme. { in: labels.FromMap(map[string]string{ model.AddressLabel: "1.2.3.4", model.SchemeLabel: "http", model.MetricsPathLabel: "/custom", model.JobLabel: "custom-job", model.ScrapeIntervalLabel: "2s", model.ScrapeTimeoutLabel: "2s", }), cfg: &config.ScrapeConfig{ Scheme: "https", MetricsPath: "/metrics", JobName: "job", ScrapeInterval: model.Duration(time.Second), ScrapeTimeout: model.Duration(time.Second), }, res: labels.FromMap(map[string]string{ model.AddressLabel: "1.2.3.4:80", model.InstanceLabel: "1.2.3.4:80", model.SchemeLabel: "http", model.MetricsPathLabel: "/custom", model.JobLabel: "custom-job", model.ScrapeIntervalLabel: "2s", model.ScrapeTimeoutLabel: "2s", }), resOrig: labels.FromMap(map[string]string{ model.AddressLabel: "1.2.3.4", model.SchemeLabel: "http", model.MetricsPathLabel: "/custom", model.JobLabel: "custom-job", model.ScrapeIntervalLabel: "2s", model.ScrapeTimeoutLabel: "2s", }), }, // Provide instance label. HTTPS port default for IPv6. { in: labels.FromMap(map[string]string{ model.AddressLabel: "[::1]", model.InstanceLabel: "custom-instance", }), cfg: &config.ScrapeConfig{ Scheme: "https", MetricsPath: "/metrics", JobName: "job", ScrapeInterval: model.Duration(time.Second), ScrapeTimeout: model.Duration(time.Second), }, res: labels.FromMap(map[string]string{ model.AddressLabel: "[::1]:443", model.InstanceLabel: "custom-instance", model.SchemeLabel: "https", model.MetricsPathLabel: "/metrics", model.JobLabel: "job", model.ScrapeIntervalLabel: "1s", model.ScrapeTimeoutLabel: "1s", }), resOrig: labels.FromMap(map[string]string{ model.AddressLabel: "[::1]", model.InstanceLabel: "custom-instance", model.SchemeLabel: "https", model.MetricsPathLabel: "/metrics", model.JobLabel: "job", model.ScrapeIntervalLabel: "1s", model.ScrapeTimeoutLabel: "1s", }), }, // Address label missing. { in: labels.FromStrings("custom", "value"), cfg: &config.ScrapeConfig{ Scheme: "https", MetricsPath: "/metrics", JobName: "job", ScrapeInterval: model.Duration(time.Second), ScrapeTimeout: model.Duration(time.Second), }, res: nil, resOrig: nil, err: "no address", }, // Address label missing, but added in relabelling. { in: labels.FromStrings("custom", "host:1234"), cfg: &config.ScrapeConfig{ Scheme: "https", MetricsPath: "/metrics", JobName: "job", ScrapeInterval: model.Duration(time.Second), ScrapeTimeout: model.Duration(time.Second), RelabelConfigs: []*relabel.Config{ { Action: relabel.Replace, Regex: relabel.MustNewRegexp("(.*)"), SourceLabels: model.LabelNames{"custom"}, Replacement: "${1}", TargetLabel: string(model.AddressLabel), }, }, }, res: labels.FromMap(map[string]string{ model.AddressLabel: "host:1234", model.InstanceLabel: "host:1234", model.SchemeLabel: "https", model.MetricsPathLabel: "/metrics", model.JobLabel: "job", model.ScrapeIntervalLabel: "1s", model.ScrapeTimeoutLabel: "1s", "custom": "host:1234", }), resOrig: labels.FromMap(map[string]string{ model.SchemeLabel: "https", model.MetricsPathLabel: "/metrics", model.JobLabel: "job", model.ScrapeIntervalLabel: "1s", model.ScrapeTimeoutLabel: "1s", "custom": "host:1234", }), }, // Address label missing, but added in relabelling. { in: labels.FromStrings("custom", "host:1234"), cfg: &config.ScrapeConfig{ Scheme: "https", MetricsPath: "/metrics", JobName: "job", ScrapeInterval: model.Duration(time.Second), ScrapeTimeout: model.Duration(time.Second), RelabelConfigs: []*relabel.Config{ { Action: relabel.Replace, Regex: relabel.MustNewRegexp("(.*)"), SourceLabels: model.LabelNames{"custom"}, Replacement: "${1}", TargetLabel: string(model.AddressLabel), }, }, }, res: labels.FromMap(map[string]string{ model.AddressLabel: "host:1234", model.InstanceLabel: "host:1234", model.SchemeLabel: "https", model.MetricsPathLabel: "/metrics", model.JobLabel: "job", model.ScrapeIntervalLabel: "1s", model.ScrapeTimeoutLabel: "1s", "custom": "host:1234", }), resOrig: labels.FromMap(map[string]string{ model.SchemeLabel: "https", model.MetricsPathLabel: "/metrics", model.JobLabel: "job", model.ScrapeIntervalLabel: "1s", model.ScrapeTimeoutLabel: "1s", "custom": "host:1234", }), }, // Invalid UTF-8 in label. { in: labels.FromMap(map[string]string{ model.AddressLabel: "1.2.3.4:1000", "custom": "\xbd", }), cfg: &config.ScrapeConfig{ Scheme: "https", MetricsPath: "/metrics", JobName: "job", ScrapeInterval: model.Duration(time.Second), ScrapeTimeout: model.Duration(time.Second), }, res: nil, resOrig: nil, err: "invalid label value for \"custom\": \"\\xbd\"", }, // Invalid duration in interval label. { in: labels.FromMap(map[string]string{ model.AddressLabel: "1.2.3.4:1000", model.ScrapeIntervalLabel: "2notseconds", }), cfg: &config.ScrapeConfig{ Scheme: "https", MetricsPath: "/metrics", JobName: "job", ScrapeInterval: model.Duration(time.Second), ScrapeTimeout: model.Duration(time.Second), }, res: nil, resOrig: nil, err: "error parsing scrape interval: not a valid duration string: \"2notseconds\"", }, // Invalid duration in timeout label. { in: labels.FromMap(map[string]string{ model.AddressLabel: "1.2.3.4:1000", model.ScrapeTimeoutLabel: "2notseconds", }), cfg: &config.ScrapeConfig{ Scheme: "https", MetricsPath: "/metrics", JobName: "job", ScrapeInterval: model.Duration(time.Second), ScrapeTimeout: model.Duration(time.Second), }, res: nil, resOrig: nil, err: "error parsing scrape timeout: not a valid duration string: \"2notseconds\"", }, // 0 interval in timeout label. { in: labels.FromMap(map[string]string{ model.AddressLabel: "1.2.3.4:1000", model.ScrapeIntervalLabel: "0s", }), cfg: &config.ScrapeConfig{ Scheme: "https", MetricsPath: "/metrics", JobName: "job", ScrapeInterval: model.Duration(time.Second), ScrapeTimeout: model.Duration(time.Second), }, res: nil, resOrig: nil, err: "scrape interval cannot be 0", }, // 0 duration in timeout label. { in: labels.FromMap(map[string]string{ model.AddressLabel: "1.2.3.4:1000", model.ScrapeTimeoutLabel: "0s", }), cfg: &config.ScrapeConfig{ Scheme: "https", MetricsPath: "/metrics", JobName: "job", ScrapeInterval: model.Duration(time.Second), ScrapeTimeout: model.Duration(time.Second), }, res: nil, resOrig: nil, err: "scrape timeout cannot be 0", }, // Timeout less than interval. { in: labels.FromMap(map[string]string{ model.AddressLabel: "1.2.3.4:1000", model.ScrapeIntervalLabel: "1s", model.ScrapeTimeoutLabel: "2s", }), cfg: &config.ScrapeConfig{ Scheme: "https", MetricsPath: "/metrics", JobName: "job", ScrapeInterval: model.Duration(time.Second), ScrapeTimeout: model.Duration(time.Second), }, res: nil, resOrig: nil, err: "scrape timeout cannot be greater than scrape interval (\"2s\" > \"1s\")", }, } for _, c := range cases { in := c.in.Copy() res, orig, err := PopulateLabels(c.in, c.cfg) if c.err != "" { require.EqualError(t, err, c.err) } else { require.NoError(t, err) } require.Equal(t, c.in, in) require.Equal(t, c.res, res) require.Equal(t, c.resOrig, orig) } } func loadConfiguration(t *testing.T, c string) *config.Config { t.Helper() cfg := &config.Config{} if err := yaml.UnmarshalStrict([]byte(c), cfg); err != nil { t.Fatalf("Unable to load YAML config: %s", err) } return cfg } func noopLoop() loop { return &testLoop{ startFunc: func(interval, timeout time.Duration, errc chan<- error) {}, stopFunc: func() {}, } } func TestManagerApplyConfig(t *testing.T) { // Valid initial configuration. cfgText1 := ` scrape_configs: - job_name: job1 static_configs: - targets: ["foo:9090"] ` // Invalid configuration. cfgText2 := ` scrape_configs: - job_name: job1 scheme: https static_configs: - targets: ["foo:9090"] tls_config: ca_file: /not/existing/ca/file ` // Valid configuration. cfgText3 := ` scrape_configs: - job_name: job1 scheme: https static_configs: - targets: ["foo:9090"] ` var ( cfg1 = loadConfiguration(t, cfgText1) cfg2 = loadConfiguration(t, cfgText2) cfg3 = loadConfiguration(t, cfgText3) ch = make(chan struct{}, 1) ) opts := Options{} scrapeManager := NewManager(&opts, nil, nil) newLoop := func(scrapeLoopOptions) loop { ch <- struct{}{} return noopLoop() } sp := &scrapePool{ appendable: &nopAppendable{}, activeTargets: map[uint64]*Target{ 1: {}, }, 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 TestSetJitter(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.setJitterSeed(cfg1.GlobalConfig.ExternalLabels); err != nil { t.Error(err) } jitter1 := scrapeManager.jitterSeed if jitter1 == 0 { t.Error("Jitter has to be a hash of uint64") } // Load the first config. cfg2 := getConfig("ha2") if err := scrapeManager.setJitterSeed(cfg2.GlobalConfig.ExternalLabels); err != nil { t.Error(err) } jitter2 := scrapeManager.jitterSeed if jitter1 == jitter2 { t.Error("Jitter should not be the same on different set of external labels") } }