1
0
mirror of https://github.com/open-telemetry/opentelemetry-go.git synced 2024-12-22 20:06:07 +02:00
opentelemetry-go/example/prometheus/main.go
Joshua MacDonald 6df0de12bc
Metrics: Rename sdk/export/metric.ExportKind to aggregation.Temporality (#2274)
* Rename ExportKind to aggregation.Temporality

* Changelog uhhhhhhh

* Apply suggestions from code review

Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>

* int->uint8

* go generate

* go.sum

* anual edit

Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
2021-10-15 11:18:36 -07:00

132 lines
3.5 KiB
Go

// Copyright The OpenTelemetry 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 main
import (
"context"
"fmt"
"log"
"net/http"
"sync"
"time"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/exporters/prometheus"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/metric/global"
"go.opentelemetry.io/otel/sdk/export/metric/aggregation"
"go.opentelemetry.io/otel/sdk/metric/aggregator/histogram"
controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
processor "go.opentelemetry.io/otel/sdk/metric/processor/basic"
selector "go.opentelemetry.io/otel/sdk/metric/selector/simple"
)
var (
lemonsKey = attribute.Key("ex.com/lemons")
)
func initMeter() {
config := prometheus.Config{}
c := controller.New(
processor.NewFactory(
selector.NewWithHistogramDistribution(
histogram.WithExplicitBoundaries(config.DefaultHistogramBoundaries),
),
aggregation.CumulativeTemporalitySelector(),
processor.WithMemory(true),
),
)
exporter, err := prometheus.New(config, c)
if err != nil {
log.Panicf("failed to initialize prometheus exporter %v", err)
}
global.SetMeterProvider(exporter.MeterProvider())
http.HandleFunc("/", exporter.ServeHTTP)
go func() {
_ = http.ListenAndServe(":2222", nil)
}()
fmt.Println("Prometheus server running on :2222")
}
func main() {
initMeter()
meter := global.Meter("ex.com/basic")
observerLock := new(sync.RWMutex)
observerValueToReport := new(float64)
observerLabelsToReport := new([]attribute.KeyValue)
cb := func(_ context.Context, result metric.Float64ObserverResult) {
(*observerLock).RLock()
value := *observerValueToReport
labels := *observerLabelsToReport
(*observerLock).RUnlock()
result.Observe(value, labels...)
}
_ = metric.Must(meter).NewFloat64GaugeObserver("ex.com.one", cb,
metric.WithDescription("A GaugeObserver set to 1.0"),
)
histogram := metric.Must(meter).NewFloat64Histogram("ex.com.two")
counter := metric.Must(meter).NewFloat64Counter("ex.com.three")
commonLabels := []attribute.KeyValue{lemonsKey.Int(10), attribute.String("A", "1"), attribute.String("B", "2"), attribute.String("C", "3")}
notSoCommonLabels := []attribute.KeyValue{lemonsKey.Int(13)}
ctx := context.Background()
(*observerLock).Lock()
*observerValueToReport = 1.0
*observerLabelsToReport = commonLabels
(*observerLock).Unlock()
meter.RecordBatch(
ctx,
commonLabels,
histogram.Measurement(2.0),
counter.Measurement(12.0),
)
time.Sleep(5 * time.Second)
(*observerLock).Lock()
*observerValueToReport = 1.0
*observerLabelsToReport = notSoCommonLabels
(*observerLock).Unlock()
meter.RecordBatch(
ctx,
notSoCommonLabels,
histogram.Measurement(2.0),
counter.Measurement(22.0),
)
time.Sleep(5 * time.Second)
(*observerLock).Lock()
*observerValueToReport = 13.0
*observerLabelsToReport = commonLabels
(*observerLock).Unlock()
meter.RecordBatch(
ctx,
commonLabels,
histogram.Measurement(12.0),
counter.Measurement(13.0),
)
fmt.Println("Example finished updating, please visit :2222")
select {}
}