114 lines
4.6 KiB
Go
114 lines
4.6 KiB
Go
package jaeger
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import (
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"fmt"
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"io"
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"github.com/containous/traefik/v2/pkg/log"
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"github.com/opentracing/opentracing-go"
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jaeger "github.com/uber/jaeger-client-go"
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jaegercli "github.com/uber/jaeger-client-go"
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jaegercfg "github.com/uber/jaeger-client-go/config"
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"github.com/uber/jaeger-client-go/zipkin"
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jaegermet "github.com/uber/jaeger-lib/metrics"
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)
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// Name sets the name of this tracer.
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const Name = "jaeger"
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// Config provides configuration settings for a jaeger tracer.
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type Config struct {
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SamplingServerURL string `description:"Set the sampling server url." json:"samplingServerURL,omitempty" toml:"samplingServerURL,omitempty" yaml:"samplingServerURL,omitempty"`
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SamplingType string `description:"Set the sampling type." json:"samplingType,omitempty" toml:"samplingType,omitempty" yaml:"samplingType,omitempty" export:"true"`
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SamplingParam float64 `description:"Set the sampling parameter." json:"samplingParam,omitempty" toml:"samplingParam,omitempty" yaml:"samplingParam,omitempty" export:"true"`
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LocalAgentHostPort string `description:"Set jaeger-agent's host:port that the reporter will used." json:"localAgentHostPort,omitempty" toml:"localAgentHostPort,omitempty" yaml:"localAgentHostPort,omitempty"`
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Gen128Bit bool `description:"Generate 128 bit span IDs." json:"gen128Bit,omitempty" toml:"gen128Bit,omitempty" yaml:"gen128Bit,omitempty" export:"true"`
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Propagation string `description:"Which propagation format to use (jaeger/b3)." json:"propagation,omitempty" toml:"propagation,omitempty" yaml:"propagation,omitempty" export:"true"`
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TraceContextHeaderName string `description:"Set the header to use for the trace-id." json:"traceContextHeaderName,omitempty" toml:"traceContextHeaderName,omitempty" yaml:"traceContextHeaderName,omitempty" export:"true"`
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Collector *Collector `description:"Define the collector information" json:"collector,omitempty" toml:"collector,omitempty" yaml:"collector,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.SamplingServerURL = "http://localhost:5778/sampling"
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c.SamplingType = "const"
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c.SamplingParam = 1.0
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c.LocalAgentHostPort = "127.0.0.1:6831"
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c.Propagation = "jaeger"
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c.Gen128Bit = false
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c.TraceContextHeaderName = jaegercli.TraceContextHeaderName
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}
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// Collector provides configuration settings for jaeger collector.
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type Collector struct {
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Endpoint string `description:"Instructs reporter to send spans to jaeger-collector at this URL." json:"endpoint,omitempty" toml:"endpoint,omitempty" yaml:"endpoint,omitempty" export:"true"`
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User string `description:"User for basic http authentication when sending spans to jaeger-collector." json:"user,omitempty" toml:"user,omitempty" yaml:"user,omitempty"`
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Password string `description:"Password for basic http authentication when sending spans to jaeger-collector." json:"password,omitempty" toml:"password,omitempty" yaml:"password,omitempty"`
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}
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// SetDefaults sets the default values.
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func (c *Collector) SetDefaults() {
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c.Endpoint = ""
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c.User = ""
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c.Password = ""
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}
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// Setup sets up the tracer
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func (c *Config) Setup(componentName string) (opentracing.Tracer, io.Closer, error) {
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reporter := &jaegercfg.ReporterConfig{
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LogSpans: true,
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LocalAgentHostPort: c.LocalAgentHostPort,
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}
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if c.Collector != nil {
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reporter.CollectorEndpoint = c.Collector.Endpoint
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reporter.User = c.Collector.User
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reporter.Password = c.Collector.Password
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}
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jcfg := jaegercfg.Configuration{
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Sampler: &jaegercfg.SamplerConfig{
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SamplingServerURL: c.SamplingServerURL,
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Type: c.SamplingType,
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Param: c.SamplingParam,
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},
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Reporter: reporter,
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Headers: &jaeger.HeadersConfig{
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TraceContextHeaderName: c.TraceContextHeaderName,
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},
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}
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jMetricsFactory := jaegermet.NullFactory
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opts := []jaegercfg.Option{
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jaegercfg.Logger(newJaegerLogger()),
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jaegercfg.Metrics(jMetricsFactory),
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jaegercfg.Gen128Bit(c.Gen128Bit),
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}
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switch c.Propagation {
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case "b3":
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p := zipkin.NewZipkinB3HTTPHeaderPropagator()
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opts = append(opts,
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jaegercfg.Injector(opentracing.HTTPHeaders, p),
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jaegercfg.Extractor(opentracing.HTTPHeaders, p),
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)
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case "jaeger", "":
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default:
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return nil, nil, fmt.Errorf("unknown propagation format: %s", c.Propagation)
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}
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// Initialize tracer with a logger and a metrics factory
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closer, err := jcfg.InitGlobalTracer(
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componentName,
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opts...,
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)
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if err != nil {
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log.WithoutContext().Warnf("Could not initialize jaeger tracer: %s", err.Error())
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return nil, nil, err
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}
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log.WithoutContext().Debug("Jaeger tracer configured")
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return opentracing.GlobalTracer(), closer, nil
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}
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