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f8fcfda872
* Add options to measurement methods
* Update noop
* Update global impl
* Update SDK impl
* Fix metric API example
* Update prometheus exporter tests
* Update examples
* WithAttributes and WithAttributeSet
* Add changes to changelog
* Accept slice instead of variadic to new conf funcs
* Clarify WithAttributes performance in docs
* Address feedback about WithAttributes comment
* Add changelog entry for WithAttribute{s,Set}
* Remove number scope from measure opts
* Update changelog
* Remove left-over test cases
---------
Co-authored-by: Robert Pająk <pellared@hotmail.com>
100 lines
2.7 KiB
Go
100 lines
2.7 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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)
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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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provider := metric.NewMeterProvider(
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metric.WithReader(exporter),
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// View to customize histogram buckets and rename a single histogram instrument.
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metric.WithView(metric.NewView(
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metric.Instrument{
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Name: "custom_histogram",
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Scope: instrumentation.Scope{Name: meterName},
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},
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metric.Stream{
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Name: "bar",
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Aggregation: aggregation.ExplicitBucketHistogram{
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Boundaries: []float64{64, 128, 256, 512, 1024, 2048, 4096},
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},
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},
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)),
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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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opt := instrument.WithAttributes(
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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.Float64Counter("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, opt)
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histogram, err := meter.Float64Histogram("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, opt)
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histogram.Record(ctx, 64, opt)
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histogram.Record(ctx, 701, opt)
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histogram.Record(ctx, 830, opt)
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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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