76 lines
1.8 KiB
Go
76 lines
1.8 KiB
Go
package middleware
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import (
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"fmt"
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gc "gateway/config"
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"gateway/core"
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"github.com/gin-gonic/gin"
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"github.com/opentracing/opentracing-go"
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"github.com/opentracing/opentracing-go/ext"
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"github.com/uber/jaeger-client-go/config"
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"io"
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)
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func OpenTracing() gin.HandlerFunc {
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return func(c *gin.Context) {
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var parentSpan opentracing.Span
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tracer, closer := NewJaegerTracer()
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defer closer.Close()
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spCtx, err := opentracing.GlobalTracer().Extract(opentracing.HTTPHeaders, opentracing.HTTPHeadersCarrier(c.Request.Header))
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if err != nil {
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core.Log.Error("Jaeger错误: %v", err.Error())
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parentSpan = tracer.StartSpan(c.Request.URL.Path)
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defer parentSpan.Finish()
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} else {
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parentSpan = opentracing.StartSpan(
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c.Request.URL.Path,
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opentracing.ChildOf(spCtx),
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opentracing.Tag{Key: string(ext.Component), Value: "HTTP"},
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ext.SpanKindRPCServer,
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)
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defer parentSpan.Finish()
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}
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c.Set("Tracer", tracer)
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asd := fmt.Sprintf("%v", parentSpan.Context())
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c.Set("UberTraceId", asd)
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c.Set("ParentSpanContext", parentSpan.Context())
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c.Next()
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ext.HTTPStatusCode.Set(parentSpan, uint16(c.Writer.Status()))
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if c.Writer.Status() > 299 {
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ext.Error.Set(parentSpan, true)
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}
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}
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}
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func NewJaegerTracer() (opentracing.Tracer, io.Closer) {
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cfg := &config.Configuration{
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Sampler: &config.SamplerConfig{
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Type: "const", //固定采样
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Param: 1, //1=全采样、0=不采样
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},
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Reporter: &config.ReporterConfig{
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LogSpans: true,
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LocalAgentHostPort: gc.AppInfo.JaegerServer,
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},
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ServiceName: gc.AppInfo.AppName,
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}
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tracer, closer, err := cfg.NewTracer()
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if err != nil {
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core.Log.Error("Jaeger连接失败: %v", err.Error())
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return nil, nil
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}
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core.Log.Debug("Jaeger连接成功")
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opentracing.SetGlobalTracer(tracer)
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return tracer, closer
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}
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