mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2024-12-14 10:13:10 +02:00
d1aca7b167
* Split WithView from WithReader
* Accept readers and views params in newPipelines
* Update MeterProvider pipes init
* Fix WithView comment
* Fix view example MeterProvider option
* Fix With{View,Reader} option in prom exporter test
* Test Reader not required to be comparable
* Add changes to changelog
* Fix changelog option name
111 lines
3.1 KiB
Go
111 lines
3.1 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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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 main
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import (
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"context"
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"fmt"
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"log"
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"net/http"
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"os"
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"os/signal"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"go.opentelemetry.io/otel/attribute"
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otelprom "go.opentelemetry.io/otel/exporters/prometheus"
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"go.opentelemetry.io/otel/metric/instrument"
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"go.opentelemetry.io/otel/sdk/instrumentation"
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"go.opentelemetry.io/otel/sdk/metric"
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"go.opentelemetry.io/otel/sdk/metric/aggregation"
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"go.opentelemetry.io/otel/sdk/metric/view"
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)
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const meterName = "github.com/open-telemetry/opentelemetry-go/example/view"
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func main() {
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ctx := context.Background()
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// The exporter embeds a default OpenTelemetry Reader, allowing it to be used in WithReader.
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exporter, err := otelprom.New()
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if err != nil {
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log.Fatal(err)
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}
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// View to customize histogram buckets and rename a single histogram instrument.
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customBucketsView, err := view.New(
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// Match* to match instruments
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view.MatchInstrumentName("custom_histogram"),
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view.MatchInstrumentationScope(instrumentation.Scope{Name: meterName}),
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// With* to modify instruments
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view.WithSetAggregation(aggregation.ExplicitBucketHistogram{
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Boundaries: []float64{64, 128, 256, 512, 1024, 2048, 4096},
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}),
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view.WithRename("bar"),
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)
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if err != nil {
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log.Fatal(err)
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}
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// Default view to keep all instruments
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defaultView, err := view.New(view.MatchInstrumentName("*"))
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if err != nil {
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log.Fatal(err)
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}
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provider := metric.NewMeterProvider(
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metric.WithReader(exporter),
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metric.WithView(customBucketsView, defaultView),
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)
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meter := provider.Meter(meterName)
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// Start the prometheus HTTP server and pass the exporter Collector to it
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go serveMetrics()
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attrs := []attribute.KeyValue{
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attribute.Key("A").String("B"),
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attribute.Key("C").String("D"),
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}
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counter, err := meter.SyncFloat64().Counter("foo", instrument.WithDescription("a simple counter"))
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if err != nil {
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log.Fatal(err)
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}
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counter.Add(ctx, 5, attrs...)
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histogram, err := meter.SyncFloat64().Histogram("custom_histogram", instrument.WithDescription("a histogram with custom buckets and rename"))
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if err != nil {
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log.Fatal(err)
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}
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histogram.Record(ctx, 136, attrs...)
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histogram.Record(ctx, 64, attrs...)
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histogram.Record(ctx, 701, attrs...)
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histogram.Record(ctx, 830, attrs...)
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ctx, _ = signal.NotifyContext(ctx, os.Interrupt)
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<-ctx.Done()
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}
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func serveMetrics() {
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log.Printf("serving metrics at localhost:2222/metrics")
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http.Handle("/metrics", promhttp.Handler())
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err := http.ListenAndServe(":2222", nil)
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if err != nil {
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fmt.Printf("error serving http: %v", err)
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return
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}
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}
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