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prometheus_test.go
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prometheus_test.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package prometheusexporter
import (
"context"
"fmt"
"io"
"net/http"
"strings"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"go.opentelemetry.io/collector/component/componenttest"
"go.opentelemetry.io/collector/config/confighttp"
"go.opentelemetry.io/collector/config/configtls"
"go.opentelemetry.io/collector/exporter/exportertest"
"go.opentelemetry.io/collector/pdata/pcommon"
"go.opentelemetry.io/collector/pdata/pmetric"
conventions "go.opentelemetry.io/collector/semconv/v1.6.1"
"github.com/open-telemetry/opentelemetry-collector-contrib/internal/coreinternal/testdata"
"github.com/open-telemetry/opentelemetry-collector-contrib/pkg/resourcetotelemetry"
)
func TestPrometheusExporter(t *testing.T) {
tests := []struct {
config *Config
wantErr string
wantStartErr string
}{
{
config: &Config{
Namespace: "test",
ConstLabels: map[string]string{
"foo0": "bar0",
"code0": "one0",
},
HTTPServerSettings: confighttp.HTTPServerSettings{
Endpoint: "localhost:8999",
},
SendTimestamps: false,
MetricExpiration: 60 * time.Second,
},
},
{
config: &Config{
HTTPServerSettings: confighttp.HTTPServerSettings{
Endpoint: "localhost:88999",
},
},
wantStartErr: "listen tcp: address 88999: invalid port",
},
{
config: &Config{},
wantErr: "expecting a non-blank address to run the Prometheus metrics handler",
},
}
factory := NewFactory()
set := exportertest.NewNopCreateSettings()
for _, tt := range tests {
// Run it a few times to ensure that shutdowns exit cleanly.
for j := 0; j < 3; j++ {
exp, err := factory.CreateMetricsExporter(context.Background(), set, tt.config)
if tt.wantErr != "" {
require.Error(t, err)
assert.Equal(t, tt.wantErr, err.Error())
continue
}
require.NoError(t, err)
assert.NotNil(t, exp)
err = exp.Start(context.Background(), componenttest.NewNopHost())
if tt.wantStartErr != "" {
require.Error(t, err)
assert.Equal(t, tt.wantStartErr, err.Error())
} else {
require.NoError(t, err)
}
require.NoError(t, exp.Shutdown(context.Background()))
}
}
}
func TestPrometheusExporter_WithTLS(t *testing.T) {
cfg := &Config{
Namespace: "test",
ConstLabels: map[string]string{
"foo2": "bar2",
"code2": "one2",
},
HTTPServerSettings: confighttp.HTTPServerSettings{
Endpoint: "localhost:7777",
TLSSetting: &configtls.TLSServerSetting{
TLSSetting: configtls.TLSSetting{
CertFile: "./testdata/certs/server.crt",
KeyFile: "./testdata/certs/server.key",
CAFile: "./testdata/certs/ca.crt",
},
},
},
SendTimestamps: true,
MetricExpiration: 120 * time.Minute,
ResourceToTelemetrySettings: resourcetotelemetry.Settings{
Enabled: true,
},
}
factory := NewFactory()
set := exportertest.NewNopCreateSettings()
exp, err := factory.CreateMetricsExporter(context.Background(), set, cfg)
require.NoError(t, err)
tlscs := configtls.TLSClientSetting{
TLSSetting: configtls.TLSSetting{
CAFile: "./testdata/certs/ca.crt",
CertFile: "./testdata/certs/client.crt",
KeyFile: "./testdata/certs/client.key",
},
ServerName: "localhost",
}
tls, err := tlscs.LoadTLSConfig()
assert.NoError(t, err)
httpClient := &http.Client{
Transport: &http.Transport{
TLSClientConfig: tls,
},
}
t.Cleanup(func() {
require.NoError(t, exp.Shutdown(context.Background()))
// trigger a get so that the server cleans up our keepalive socket
_, err = httpClient.Get("https://localhost:7777/metrics")
require.NoError(t, err)
})
assert.NotNil(t, exp)
require.NoError(t, exp.Start(context.Background(), componenttest.NewNopHost()))
md := testdata.GenerateMetricsOneMetric()
assert.NotNil(t, md)
assert.NoError(t, exp.ConsumeMetrics(context.Background(), md))
rsp, err := httpClient.Get("https://localhost:7777/metrics")
require.NoError(t, err, "Failed to perform a scrape")
if g, w := rsp.StatusCode, 200; g != w {
t.Errorf("Mismatched HTTP response status code: Got: %d Want: %d", g, w)
}
blob, _ := io.ReadAll(rsp.Body)
_ = rsp.Body.Close()
want := []string{
`# HELP test_counter_int`,
`# TYPE test_counter_int counter`,
`test_counter_int{code2="one2",foo2="bar2",label_1="label-value-1",resource_attr="resource-attr-val-1"} 123 1581452773000`,
`test_counter_int{code2="one2",foo2="bar2",label_2="label-value-2",resource_attr="resource-attr-val-1"} 456 1581452773000`,
}
for _, w := range want {
if !strings.Contains(string(blob), w) {
t.Errorf("Missing %v from response:\n%v", w, string(blob))
}
}
}
// See: https://github.com/open-telemetry/opentelemetry-collector-contrib/issues/4986
func TestPrometheusExporter_endToEndMultipleTargets(t *testing.T) {
cfg := &Config{
Namespace: "test",
ConstLabels: map[string]string{
"foo1": "bar1",
"code1": "one1",
},
HTTPServerSettings: confighttp.HTTPServerSettings{
Endpoint: "localhost:7777",
},
MetricExpiration: 120 * time.Minute,
}
factory := NewFactory()
set := exportertest.NewNopCreateSettings()
exp, err := factory.CreateMetricsExporter(context.Background(), set, cfg)
assert.NoError(t, err)
t.Cleanup(func() {
require.NoError(t, exp.Shutdown(context.Background()))
// trigger a get so that the server cleans up our keepalive socket
_, err = http.Get("http:https://localhost:7777/metrics")
require.NoError(t, err)
})
assert.NotNil(t, exp)
require.NoError(t, exp.Start(context.Background(), componenttest.NewNopHost()))
// Should accumulate multiple metrics from different targets
assert.NoError(t, exp.ConsumeMetrics(context.Background(), metricBuilder(128, "metric_1_", "cpu-exporter", "localhost:8080")))
assert.NoError(t, exp.ConsumeMetrics(context.Background(), metricBuilder(128, "metric_1_", "cpu-exporter", "localhost:8081")))
for delta := 0; delta <= 20; delta += 10 {
assert.NoError(t, exp.ConsumeMetrics(context.Background(), metricBuilder(int64(delta), "metric_2_", "cpu-exporter", "localhost:8080")))
assert.NoError(t, exp.ConsumeMetrics(context.Background(), metricBuilder(int64(delta), "metric_2_", "cpu-exporter", "localhost:8081")))
res, err1 := http.Get("http:https://localhost:7777/metrics")
require.NoError(t, err1, "Failed to perform a scrape")
if g, w := res.StatusCode, 200; g != w {
t.Errorf("Mismatched HTTP response status code: Got: %d Want: %d", g, w)
}
blob, _ := io.ReadAll(res.Body)
_ = res.Body.Close()
want := []string{
`# HELP test_metric_1_this_one_there_where Extra ones`,
`# TYPE test_metric_1_this_one_there_where counter`,
fmt.Sprintf(`test_metric_1_this_one_there_where{arch="x86",code1="one1",foo1="bar1",instance="localhost:8080",job="cpu-exporter",os="windows"} %v`, 99+128),
fmt.Sprintf(`test_metric_1_this_one_there_where{arch="x86",code1="one1",foo1="bar1",instance="localhost:8080",job="cpu-exporter",os="linux"} %v`, 100+128),
fmt.Sprintf(`test_metric_1_this_one_there_where{arch="x86",code1="one1",foo1="bar1",instance="localhost:8081",job="cpu-exporter",os="windows"} %v`, 99+128),
fmt.Sprintf(`test_metric_1_this_one_there_where{arch="x86",code1="one1",foo1="bar1",instance="localhost:8081",job="cpu-exporter",os="linux"} %v`, 100+128),
`# HELP test_metric_2_this_one_there_where Extra ones`,
`# TYPE test_metric_2_this_one_there_where counter`,
fmt.Sprintf(`test_metric_2_this_one_there_where{arch="x86",code1="one1",foo1="bar1",instance="localhost:8080",job="cpu-exporter",os="windows"} %v`, 99+delta),
fmt.Sprintf(`test_metric_2_this_one_there_where{arch="x86",code1="one1",foo1="bar1",instance="localhost:8080",job="cpu-exporter",os="linux"} %v`, 100+delta),
fmt.Sprintf(`test_metric_2_this_one_there_where{arch="x86",code1="one1",foo1="bar1",instance="localhost:8081",job="cpu-exporter",os="windows"} %v`, 99+delta),
fmt.Sprintf(`test_metric_2_this_one_there_where{arch="x86",code1="one1",foo1="bar1",instance="localhost:8081",job="cpu-exporter",os="linux"} %v`, 100+delta),
}
for _, w := range want {
if !strings.Contains(string(blob), w) {
t.Errorf("Missing %v from response:\n%v", w, string(blob))
}
}
}
// Expired metrics should be removed during first scrape
exp.(*wrapMetricsExporter).exporter.collector.accumulator.(*lastValueAccumulator).metricExpiration = 1 * time.Millisecond
time.Sleep(10 * time.Millisecond)
res, err := http.Get("http:https://localhost:7777/metrics")
require.NoError(t, err, "Failed to perform a scrape")
if g, w := res.StatusCode, 200; g != w {
t.Errorf("Mismatched HTTP response status code: Got: %d Want: %d", g, w)
}
blob, _ := io.ReadAll(res.Body)
_ = res.Body.Close()
require.Emptyf(t, string(blob), "Metrics did not expire")
}
func TestPrometheusExporter_endToEnd(t *testing.T) {
cfg := &Config{
Namespace: "test",
ConstLabels: map[string]string{
"foo1": "bar1",
"code1": "one1",
},
HTTPServerSettings: confighttp.HTTPServerSettings{
Endpoint: "localhost:7777",
},
MetricExpiration: 120 * time.Minute,
}
factory := NewFactory()
set := exportertest.NewNopCreateSettings()
exp, err := factory.CreateMetricsExporter(context.Background(), set, cfg)
assert.NoError(t, err)
t.Cleanup(func() {
require.NoError(t, exp.Shutdown(context.Background()))
// trigger a get so that the server cleans up our keepalive socket
_, err = http.Get("http:https://localhost:7777/metrics")
require.NoError(t, err)
})
assert.NotNil(t, exp)
require.NoError(t, exp.Start(context.Background(), componenttest.NewNopHost()))
// Should accumulate multiple metrics
assert.NoError(t, exp.ConsumeMetrics(context.Background(), metricBuilder(128, "metric_1_", "cpu-exporter", "localhost:8080")))
for delta := 0; delta <= 20; delta += 10 {
assert.NoError(t, exp.ConsumeMetrics(context.Background(), metricBuilder(int64(delta), "metric_2_", "cpu-exporter", "localhost:8080")))
res, err1 := http.Get("http:https://localhost:7777/metrics")
require.NoError(t, err1, "Failed to perform a scrape")
if g, w := res.StatusCode, 200; g != w {
t.Errorf("Mismatched HTTP response status code: Got: %d Want: %d", g, w)
}
blob, _ := io.ReadAll(res.Body)
_ = res.Body.Close()
want := []string{
`# HELP test_metric_1_this_one_there_where Extra ones`,
`# TYPE test_metric_1_this_one_there_where counter`,
fmt.Sprintf(`test_metric_1_this_one_there_where{arch="x86",code1="one1",foo1="bar1",instance="localhost:8080",job="cpu-exporter",os="windows"} %v`, 99+128),
fmt.Sprintf(`test_metric_1_this_one_there_where{arch="x86",code1="one1",foo1="bar1",instance="localhost:8080",job="cpu-exporter",os="linux"} %v`, 100+128),
`# HELP test_metric_2_this_one_there_where Extra ones`,
`# TYPE test_metric_2_this_one_there_where counter`,
fmt.Sprintf(`test_metric_2_this_one_there_where{arch="x86",code1="one1",foo1="bar1",instance="localhost:8080",job="cpu-exporter",os="windows"} %v`, 99+delta),
fmt.Sprintf(`test_metric_2_this_one_there_where{arch="x86",code1="one1",foo1="bar1",instance="localhost:8080",job="cpu-exporter",os="linux"} %v`, 100+delta),
}
for _, w := range want {
if !strings.Contains(string(blob), w) {
t.Errorf("Missing %v from response:\n%v", w, string(blob))
}
}
}
// Expired metrics should be removed during first scrape
exp.(*wrapMetricsExporter).exporter.collector.accumulator.(*lastValueAccumulator).metricExpiration = 1 * time.Millisecond
time.Sleep(10 * time.Millisecond)
res, err := http.Get("http:https://localhost:7777/metrics")
require.NoError(t, err, "Failed to perform a scrape")
if g, w := res.StatusCode, 200; g != w {
t.Errorf("Mismatched HTTP response status code: Got: %d Want: %d", g, w)
}
blob, _ := io.ReadAll(res.Body)
_ = res.Body.Close()
require.Emptyf(t, string(blob), "Metrics did not expire")
}
func TestPrometheusExporter_endToEndWithTimestamps(t *testing.T) {
cfg := &Config{
Namespace: "test",
ConstLabels: map[string]string{
"foo2": "bar2",
"code2": "one2",
},
HTTPServerSettings: confighttp.HTTPServerSettings{
Endpoint: "localhost:7777",
},
SendTimestamps: true,
MetricExpiration: 120 * time.Minute,
}
factory := NewFactory()
set := exportertest.NewNopCreateSettings()
exp, err := factory.CreateMetricsExporter(context.Background(), set, cfg)
assert.NoError(t, err)
t.Cleanup(func() {
require.NoError(t, exp.Shutdown(context.Background()))
// trigger a get so that the server cleans up our keepalive socket
_, err = http.Get("http:https://localhost:7777/metrics")
require.NoError(t, err)
})
assert.NotNil(t, exp)
require.NoError(t, exp.Start(context.Background(), componenttest.NewNopHost()))
// Should accumulate multiple metrics
assert.NoError(t, exp.ConsumeMetrics(context.Background(), metricBuilder(128, "metric_1_", "node-exporter", "localhost:8080")))
for delta := 0; delta <= 20; delta += 10 {
assert.NoError(t, exp.ConsumeMetrics(context.Background(), metricBuilder(int64(delta), "metric_2_", "node-exporter", "localhost:8080")))
res, err1 := http.Get("http:https://localhost:7777/metrics")
require.NoError(t, err1, "Failed to perform a scrape")
if g, w := res.StatusCode, 200; g != w {
t.Errorf("Mismatched HTTP response status code: Got: %d Want: %d", g, w)
}
blob, _ := io.ReadAll(res.Body)
_ = res.Body.Close()
want := []string{
`# HELP test_metric_1_this_one_there_where Extra ones`,
`# TYPE test_metric_1_this_one_there_where counter`,
fmt.Sprintf(`test_metric_1_this_one_there_where{arch="x86",code2="one2",foo2="bar2",instance="localhost:8080",job="node-exporter",os="windows"} %v %v`, 99+128, 1543160298100+128000),
fmt.Sprintf(`test_metric_1_this_one_there_where{arch="x86",code2="one2",foo2="bar2",instance="localhost:8080",job="node-exporter",os="linux"} %v %v`, 100+128, 1543160298100),
`# HELP test_metric_2_this_one_there_where Extra ones`,
`# TYPE test_metric_2_this_one_there_where counter`,
fmt.Sprintf(`test_metric_2_this_one_there_where{arch="x86",code2="one2",foo2="bar2",instance="localhost:8080",job="node-exporter",os="windows"} %v %v`, 99+delta, 1543160298100+delta*1000),
fmt.Sprintf(`test_metric_2_this_one_there_where{arch="x86",code2="one2",foo2="bar2",instance="localhost:8080",job="node-exporter",os="linux"} %v %v`, 100+delta, 1543160298100),
}
for _, w := range want {
if !strings.Contains(string(blob), w) {
t.Errorf("Missing %v from response:\n%v", w, string(blob))
}
}
}
// Expired metrics should be removed during first scrape
exp.(*wrapMetricsExporter).exporter.collector.accumulator.(*lastValueAccumulator).metricExpiration = 1 * time.Millisecond
time.Sleep(10 * time.Millisecond)
res, err := http.Get("http:https://localhost:7777/metrics")
require.NoError(t, err, "Failed to perform a scrape")
if g, w := res.StatusCode, 200; g != w {
t.Errorf("Mismatched HTTP response status code: Got: %d Want: %d", g, w)
}
blob, _ := io.ReadAll(res.Body)
_ = res.Body.Close()
require.Emptyf(t, string(blob), "Metrics did not expire")
}
func TestPrometheusExporter_endToEndWithResource(t *testing.T) {
cfg := &Config{
Namespace: "test",
ConstLabels: map[string]string{
"foo2": "bar2",
"code2": "one2",
},
HTTPServerSettings: confighttp.HTTPServerSettings{
Endpoint: "localhost:7777",
},
SendTimestamps: true,
MetricExpiration: 120 * time.Minute,
ResourceToTelemetrySettings: resourcetotelemetry.Settings{
Enabled: true,
},
}
factory := NewFactory()
set := exportertest.NewNopCreateSettings()
exp, err := factory.CreateMetricsExporter(context.Background(), set, cfg)
assert.NoError(t, err)
t.Cleanup(func() {
require.NoError(t, exp.Shutdown(context.Background()))
// trigger a get so that the server cleans up our keepalive socket
_, err = http.Get("http:https://localhost:7777/metrics")
require.NoError(t, err, "Failed to perform a scrape")
})
assert.NotNil(t, exp)
require.NoError(t, exp.Start(context.Background(), componenttest.NewNopHost()))
md := testdata.GenerateMetricsOneMetric()
assert.NotNil(t, md)
assert.NoError(t, exp.ConsumeMetrics(context.Background(), md))
rsp, err := http.Get("http:https://localhost:7777/metrics")
require.NoError(t, err, "Failed to perform a scrape")
if g, w := rsp.StatusCode, 200; g != w {
t.Errorf("Mismatched HTTP response status code: Got: %d Want: %d", g, w)
}
blob, _ := io.ReadAll(rsp.Body)
_ = rsp.Body.Close()
want := []string{
`# HELP test_counter_int`,
`# TYPE test_counter_int counter`,
`test_counter_int{code2="one2",foo2="bar2",label_1="label-value-1",resource_attr="resource-attr-val-1"} 123 1581452773000`,
`test_counter_int{code2="one2",foo2="bar2",label_2="label-value-2",resource_attr="resource-attr-val-1"} 456 1581452773000`,
}
for _, w := range want {
if !strings.Contains(string(blob), w) {
t.Errorf("Missing %v from response:\n%v", w, string(blob))
}
}
}
func metricBuilder(delta int64, prefix, job, instance string) pmetric.Metrics {
md := pmetric.NewMetrics()
rms := md.ResourceMetrics().AppendEmpty()
rms0 := md.ResourceMetrics().At(0)
rms0.Resource().Attributes().PutStr(conventions.AttributeServiceName, job)
rms0.Resource().Attributes().PutStr(conventions.AttributeServiceInstanceID, instance)
ms := rms.ScopeMetrics().AppendEmpty().Metrics()
m1 := ms.AppendEmpty()
m1.SetName(prefix + "this/one/there(where)")
m1.SetDescription("Extra ones")
m1.SetUnit("1")
d1 := m1.SetEmptySum()
d1.SetIsMonotonic(true)
d1.SetAggregationTemporality(pmetric.AggregationTemporalityCumulative)
dp1 := d1.DataPoints().AppendEmpty()
dp1.SetStartTimestamp(pcommon.NewTimestampFromTime(time.Unix(1543160298+delta, 100000090)))
dp1.SetTimestamp(pcommon.NewTimestampFromTime(time.Unix(1543160298+delta, 100000997)))
dp1.Attributes().PutStr("os", "windows")
dp1.Attributes().PutStr("arch", "x86")
dp1.SetIntValue(99 + delta)
m2 := ms.AppendEmpty()
m2.SetName(prefix + "this/one/there(where)")
m2.SetDescription("Extra ones")
m2.SetUnit("1")
d2 := m2.SetEmptySum()
d2.SetIsMonotonic(true)
d2.SetAggregationTemporality(pmetric.AggregationTemporalityCumulative)
dp2 := d2.DataPoints().AppendEmpty()
dp2.SetStartTimestamp(pcommon.NewTimestampFromTime(time.Unix(1543160298, 100000090)))
dp2.SetTimestamp(pcommon.NewTimestampFromTime(time.Unix(1543160298, 100000997)))
dp2.Attributes().PutStr("os", "linux")
dp2.Attributes().PutStr("arch", "x86")
dp2.SetIntValue(100 + delta)
return md
}