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