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opentelemetry-go/example/zipkin/main.go
2024-01-11 12:56:07 +01:00

97 lines
2.7 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.
// Command zipkin is an example program that creates spans
// and uploads to openzipkin collector.
package main
import (
"context"
"flag"
"log"
"os"
"os/signal"
"time"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/exporters/zipkin"
"go.opentelemetry.io/otel/sdk/resource"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
semconv "go.opentelemetry.io/otel/semconv/v1.24.0"
"go.opentelemetry.io/otel/trace"
)
var logger = log.New(os.Stderr, "zipkin-example", log.Ldate|log.Ltime|log.Llongfile)
// initTracer creates a new trace provider instance and registers it as global trace provider.
func initTracer(url string) (func(context.Context) error, error) {
// Create Zipkin Exporter and install it as a global tracer.
//
// For demoing purposes, always sample. In a production application, you should
// configure the sampler to a trace.ParentBased(trace.TraceIDRatioBased) set at the desired
// ratio.
exporter, err := zipkin.New(
url,
zipkin.WithLogger(logger),
)
if err != nil {
return nil, err
}
batcher := sdktrace.NewBatchSpanProcessor(exporter)
tp := sdktrace.NewTracerProvider(
sdktrace.WithSpanProcessor(batcher),
sdktrace.WithResource(resource.NewWithAttributes(
semconv.SchemaURL,
semconv.ServiceName("zipkin-test"),
)),
)
otel.SetTracerProvider(tp)
return tp.Shutdown, nil
}
func main() {
url := flag.String("zipkin", "http://localhost:9411/api/v2/spans", "zipkin url")
flag.Parse()
ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
defer cancel()
shutdown, err := initTracer(*url)
if err != nil {
log.Fatal(err)
}
defer func() {
if err := shutdown(ctx); err != nil {
log.Fatal("failed to shutdown TracerProvider: %w", err)
}
}()
tr := otel.GetTracerProvider().Tracer("component-main")
ctx, span := tr.Start(ctx, "foo", trace.WithSpanKind(trace.SpanKindServer))
<-time.After(6 * time.Millisecond)
bar(ctx)
<-time.After(6 * time.Millisecond)
span.End()
}
func bar(ctx context.Context) {
tr := otel.GetTracerProvider().Tracer("component-bar")
_, span := tr.Start(ctx, "bar")
<-time.After(6 * time.Millisecond)
span.End()
}