mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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f995380e58
* Move `api/label` to `label` * Move `api/kv` package contents into `label` package * Unify label package name * Move `api/internal/rawhelpers.go` to `internal` * Propagate replacing `api/kv` with `label` pkg * golint * Fix over-aggressive change * Update Changelog
132 lines
3.9 KiB
Go
132 lines
3.9 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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// Example using the OTLP exporter + collector + third-party backends. For
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// information about using the exporter, see:
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// https://pkg.go.dev/go.opentelemetry.io/otel/exporters/otlp?tab=doc#example-package-Insecure
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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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"time"
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"google.golang.org/grpc"
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"go.opentelemetry.io/otel/api/global"
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"go.opentelemetry.io/otel/api/metric"
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apitrace "go.opentelemetry.io/otel/api/trace"
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"go.opentelemetry.io/otel/exporters/otlp"
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"go.opentelemetry.io/otel/label"
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"go.opentelemetry.io/otel/sdk/metric/controller/push"
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"go.opentelemetry.io/otel/sdk/metric/processor/basic"
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"go.opentelemetry.io/otel/sdk/metric/selector/simple"
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"go.opentelemetry.io/otel/sdk/resource"
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sdktrace "go.opentelemetry.io/otel/sdk/trace"
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"go.opentelemetry.io/otel/semconv"
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)
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// Initializes an OTLP exporter, and configures the corresponding trace and
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// metric providers.
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func initProvider() (*otlp.Exporter, *push.Controller) {
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// If the OpenTelemetry Collector is running on a local cluster (minikube or
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// microk8s), it should be accessible through the NodePort service at the
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// `localhost:30080` address. Otherwise, replace `localhost` with the
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// address of your cluster. If you run the app inside k8s, then you can
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// probably connect directly to the service through dns
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exp, err := otlp.NewExporter(
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otlp.WithInsecure(),
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otlp.WithAddress("localhost:30080"),
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otlp.WithGRPCDialOption(grpc.WithBlock()), // useful for testing
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)
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handleErr(err, "failed to create exporter")
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traceProvider, err := sdktrace.NewProvider(
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sdktrace.WithConfig(sdktrace.Config{DefaultSampler: sdktrace.AlwaysSample()}),
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sdktrace.WithResource(resource.New(
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// the service name used to display traces in backends
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semconv.ServiceNameKey.String("test-service"),
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)),
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sdktrace.WithBatcher(exp),
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)
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handleErr(err, "failed to create trace provider")
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pusher := push.New(
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basic.New(
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simple.NewWithExactDistribution(),
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exp,
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),
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exp,
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push.WithPeriod(2*time.Second),
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)
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global.SetTraceProvider(traceProvider)
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global.SetMeterProvider(pusher.Provider())
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pusher.Start()
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return exp, pusher
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}
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func main() {
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log.Printf("Waiting for connection...")
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exp, pusher := initProvider()
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defer func() { handleErr(exp.Stop(), "failed to stop exporter") }()
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defer pusher.Stop() // pushes any last exports to the receiver
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tracer := global.Tracer("test-tracer")
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meter := global.Meter("test-meter")
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// labels represent additional key-value descriptors that can be bound to a
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// metric observer or recorder.
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commonLabels := []label.KeyValue{
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label.String("labelA", "chocolate"),
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label.String("labelB", "raspberry"),
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label.String("labelC", "vanilla"),
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}
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// Recorder metric example
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valuerecorder := metric.Must(meter).
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NewFloat64Counter(
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"an_important_metric",
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metric.WithDescription("Measures the cumulative epicness of the app"),
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).Bind(commonLabels...)
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defer valuerecorder.Unbind()
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// work begins
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ctx, span := tracer.Start(
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context.Background(),
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"CollectorExporter-Example",
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apitrace.WithAttributes(commonLabels...))
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for i := 0; i < 10; i++ {
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_, iSpan := tracer.Start(ctx, fmt.Sprintf("Sample-%d", i))
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log.Printf("Doing really hard work (%d / 10)\n", i+1)
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valuerecorder.Add(ctx, 1.0)
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<-time.After(time.Second)
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iSpan.End()
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}
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log.Printf("Done!")
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span.End()
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}
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func handleErr(err error, message string) {
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if err != nil {
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log.Fatalf("%s: %v", message, err)
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}
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}
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