// 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 (
"fmt"
"testing"
"time"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/config"
"github.com/prometheus/prometheus/discovery/targetgroup"
"github.com/prometheus/prometheus/pkg/labels"
"github.com/prometheus/prometheus/util/testutil"
)
func mustNewRegexp(s string) config.Regexp {
re, err := config.NewRegexp(s)
if err != nil {
panic(err)
}
return re
}
func TestPopulateLabels(t *testing.T) {
cases := []struct {
in labels.Labels
cfg *config.ScrapeConfig
res labels.Labels
resOrig labels.Labels
err error
}{
// 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",
},
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",
"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",
}),
},
// 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",
}),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
},
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",
}),
resOrig: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4",
model.SchemeLabel: "http",
model.MetricsPathLabel: "/custom",
model.JobLabel: "custom-job",
}),
},
// 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",
},
res: labels.FromMap(map[string]string{
model.AddressLabel: "[::1]:443",
model.InstanceLabel: "custom-instance",
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
}),
resOrig: labels.FromMap(map[string]string{
model.AddressLabel: "[::1]",
model.InstanceLabel: "custom-instance",
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
}),
},
// Address label missing.
{
in: labels.FromStrings("custom", "value"),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
},
res: nil,
resOrig: nil,
err: fmt.Errorf("no address"),
},
// Address label missing, but added in relabelling.
{
in: labels.FromStrings("custom", "host:1234"),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
RelabelConfigs: []*config.RelabelConfig{
{
Action: config.RelabelReplace,
Regex: mustNewRegexp("(.*)"),
SourceLabels: model.LabelNames{"custom"},
Replacement: "${1}",
TargetLabel: string(model.AddressLabel),
},
},
},
res: labels.FromMap(map[string]string{
model.AddressLabel: "host:1234",
model.InstanceLabel: "host:1234",
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
"custom": "host:1234",
}),
resOrig: labels.FromMap(map[string]string{
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
"custom": "host:1234",
}),
},
// Address label missing, but added in relabelling.
{
in: labels.FromStrings("custom", "host:1234"),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
RelabelConfigs: []*config.RelabelConfig{
{
Action: config.RelabelReplace,
Regex: mustNewRegexp("(.*)"),
SourceLabels: model.LabelNames{"custom"},
Replacement: "${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",
"custom": "host:1234",
}),
resOrig: labels.FromMap(map[string]string{
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
"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",
},
res: nil,
resOrig: nil,
err: fmt.Errorf("invalid label value for \"custom\": \"\\xbd\""),
},
}
for _, c := range cases {
in := c.in.Copy()
res, orig, err := populateLabels(c.in, c.cfg)
testutil.Equals(t, c.err, err)
testutil.Equals(t, c.in, in)
testutil.Equals(t, c.res, res)
testutil.Equals(t, c.resOrig, orig)
}
}
// TestScrapeManagerReloadNoChange tests that no scrape reload happens when there is no config change.
func TestManagerReloadNoChange(t *testing.T) {
tsetName := "test"
reloadCfg := &config.Config{
ScrapeConfigs: []*config.ScrapeConfig{
&config.ScrapeConfig{
ScrapeInterval: model.Duration(3 * time.Second),
ScrapeTimeout: model.Duration(2 * time.Second),
},
},
}
scrapeManager := NewManager(nil, nil)
scrapeManager.scrapeConfigs[tsetName] = reloadCfg.ScrapeConfigs[0]
// As reload never happens, new loop should never be called.
newLoop := func(_ *Target, s scraper, _ int, _ bool, _ []*config.RelabelConfig) loop {
t.Fatal("reload happened")
return nil
}
sp := &scrapePool{
appendable: &nopAppendable{},
targets: map[uint64]*Target{},
loops: map[uint64]loop{
1: &scrapeLoop{},
},
newLoop: newLoop,
logger: nil,
config: reloadCfg.ScrapeConfigs[0],
}
scrapeManager.scrapePools = map[string]*scrapePool{
tsetName: sp,
}
targets := map[string][]*targetgroup.Group{
tsetName: []*targetgroup.Group{},
}
scrapeManager.reload(targets)
}