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otel.go
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otel.go
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package main
import (
"context"
"fmt"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
"go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
"go.opentelemetry.io/otel/sdk/resource"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
semconv "go.opentelemetry.io/otel/semconv/v1.12.0"
"go.opentelemetry.io/otel/trace"
"google.golang.org/grpc/credentials"
)
const (
instrumentationName = "github.com/MNThomson/otel-action"
instrumentationVersion = "dev"
)
func Resource(conf configType) *resource.Resource {
attributes := []attribute.KeyValue{
attribute.String("telemetry.sdk.language", "go"),
attribute.String("service.version", instrumentationVersion),
attribute.String("service.name", conf.serviceName),
}
return resource.NewWithAttributes(
semconv.SchemaURL,
attributes...,
)
}
func setupOTEL(ctx context.Context, conf configType) (func(context.Context) error, error) {
stdoutexp, err := stdouttrace.New(stdouttrace.WithPrettyPrint())
if err != nil {
return nil, fmt.Errorf("creating stdout exporter: %w", err)
}
client := otlptracegrpc.NewClient(
otlptracegrpc.WithEndpoint(conf.otelEndpoint),
otlptracegrpc.WithHeaders(conf.otelHeaders),
otlptracegrpc.WithTLSCredentials(credentials.NewClientTLSFromCert(nil, "")),
)
otelexp, err := otlptrace.New(ctx, client)
if err != nil {
return nil, fmt.Errorf("creating otlp exporter: %w", err)
}
tracerProvider := sdktrace.NewTracerProvider(
sdktrace.WithBatcher(stdoutexp),
sdktrace.WithBatcher(otelexp),
sdktrace.WithResource(Resource(conf)),
sdktrace.WithSampler(sdktrace.AlwaysSample()),
)
otel.SetTracerProvider(tracerProvider)
tracer = otel.GetTracerProvider().Tracer(
instrumentationName,
trace.WithInstrumentationVersion(instrumentationVersion),
trace.WithSchemaURL(semconv.SchemaURL),
)
return tracerProvider.Shutdown, nil
}