/
jaeger_options.go
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/
jaeger_options.go
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// Copyright 2022 Lingfei Kong <colin404@foxmail.com>. All rights reserved.
// Use of this source code is governed by a MIT style
// license that can be found in the LICENSE file. The original repo for
// this file is https://github.com/superproj/onex.
//
package options
import (
"context"
"github.com/spf13/pflag"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
"go.opentelemetry.io/otel/sdk/resource"
tracesdk "go.opentelemetry.io/otel/sdk/trace"
semconv "go.opentelemetry.io/otel/semconv/v1.12.0"
)
var _ IOptions = (*JaegerOptions)(nil)
// JaegerOptions defines options for consul client.
type JaegerOptions struct {
// Server is the url of the Jaeger server
Server string `json:"server,omitempty" mapstructure:"server"`
ServiceName string `json:"service-name,omitempty" mapstructure:"service-name"`
Env string `json:"env,omitempty" mapstructure:"env"`
}
// NewJaegerOptions create a `zero` value instance.
func NewJaegerOptions() *JaegerOptions {
return &JaegerOptions{
Server: "http://127.0.0.1:14268/api/traces",
Env: "dev",
}
}
// Validate verifies flags passed to JaegerOptions.
func (o *JaegerOptions) Validate() []error {
errs := []error{}
return errs
}
// AddFlags adds flags related to mysql storage for a specific APIServer to the specified FlagSet.
func (o *JaegerOptions) AddFlags(fs *pflag.FlagSet, prefixs ...string) {
fs.StringVar(&o.Server, "jaeger.server", o.Server, ""+
"Server is the url of the Jaeger server.")
fs.StringVar(&o.ServiceName, "jaeger.service-name", o.ServiceName, ""+
"Specify the service name for jaeger resource.")
fs.StringVar(&o.Env, "jaeger.env", o.Env, "Specify the deployment environment(dev/test/staging/prod).")
}
func (o *JaegerOptions) SetTracerProvider() error {
// Create the Jaeger exporter
opts := make([]otlptracegrpc.Option, 0)
opts = append(opts, otlptracegrpc.WithEndpoint(o.Server), otlptracegrpc.WithInsecure())
exporter, err := otlptracegrpc.New(context.Background(), opts...)
if err != nil {
return err
}
res, err := resource.New(context.Background(), resource.WithAttributes(
semconv.ServiceNameKey.String(o.ServiceName),
attribute.String("env", o.Env),
attribute.String("exporter", "jaeger"),
))
if err != nil {
return err
}
// batch span processor to aggregate spans before export.
bsp := tracesdk.NewBatchSpanProcessor(exporter)
tp := tracesdk.NewTracerProvider(
// Set the sampling rate based on the parent span to 100%
tracesdk.WithSampler(tracesdk.ParentBased(tracesdk.TraceIDRatioBased(1.0))),
// Always be sure to batch in production.
tracesdk.WithSpanProcessor(bsp),
// Record information about this application in an Resource.
tracesdk.WithResource(res),
)
otel.SetTracerProvider(tp)
return nil
}