traefik/pkg/tracing/zipkin/zipkin.go

71 lines
2.3 KiB
Go

package zipkin
import (
"io"
"time"
"github.com/opentracing/opentracing-go"
zipkinot "github.com/openzipkin-contrib/zipkin-go-opentracing"
"github.com/openzipkin/zipkin-go"
"github.com/openzipkin/zipkin-go/reporter/http"
"github.com/traefik/traefik/v2/pkg/log"
)
// Name sets the name of this tracer.
const Name = "zipkin"
// Config provides configuration settings for a zipkin tracer.
type Config struct {
HTTPEndpoint string `description:"Sets the HTTP Endpoint to report traces to." json:"httpEndpoint,omitempty" toml:"httpEndpoint,omitempty" yaml:"httpEndpoint,omitempty"`
SameSpan bool `description:"Uses SameSpan RPC style traces." json:"sameSpan,omitempty" toml:"sameSpan,omitempty" yaml:"sameSpan,omitempty" export:"true"`
ID128Bit bool `description:"Uses 128 bits root span IDs." json:"id128Bit,omitempty" toml:"id128Bit,omitempty" yaml:"id128Bit,omitempty" export:"true"`
SampleRate float64 `description:"Sets the rate between 0.0 and 1.0 of requests to trace." json:"sampleRate,omitempty" toml:"sampleRate,omitempty" yaml:"sampleRate,omitempty" export:"true"`
}
// SetDefaults sets the default values.
func (c *Config) SetDefaults() {
c.HTTPEndpoint = "http://localhost:9411/api/v2/spans"
c.SameSpan = false
c.ID128Bit = true
c.SampleRate = 1.0
}
// Setup sets up the tracer.
func (c *Config) Setup(serviceName string) (opentracing.Tracer, io.Closer, error) {
// create our local endpoint
endpoint, err := zipkin.NewEndpoint(serviceName, "0.0.0.0:0")
if err != nil {
return nil, nil, err
}
// create our sampler
sampler, err := zipkin.NewBoundarySampler(c.SampleRate, time.Now().Unix())
if err != nil {
return nil, nil, err
}
// create the span reporter
reporter := http.NewReporter(c.HTTPEndpoint)
// create the native Zipkin tracer
nativeTracer, err := zipkin.NewTracer(
reporter,
zipkin.WithLocalEndpoint(endpoint),
zipkin.WithSharedSpans(c.SameSpan),
zipkin.WithTraceID128Bit(c.ID128Bit),
zipkin.WithSampler(sampler),
)
if err != nil {
return nil, nil, err
}
// wrap the Zipkin native tracer with the OpenTracing Bridge
tracer := zipkinot.Wrap(nativeTracer)
// Without this, child spans are getting the NOOP tracer
opentracing.SetGlobalTracer(tracer)
log.WithoutContext().Debug("Zipkin tracer configured")
return tracer, reporter, nil
}