buildkit/cmd/buildkitd/trace.go

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package main
import (
"io"
"os"
opentracing "github.com/opentracing/opentracing-go"
jaeger "github.com/uber/jaeger-client-go"
)
var tracer opentracing.Tracer
var closeTracer io.Closer
func init() {
tracer = opentracing.NoopTracer{}
if traceAddr := os.Getenv("JAEGER_TRACE"); traceAddr != "" {
tr, err := jaeger.NewUDPTransport(traceAddr, 0)
if err != nil {
panic(err)
}
tracer, closeTracer = jaeger.NewTracer(
"buildkitd",
jaeger.NewConstSampler(true),
jaeger.NewRemoteReporter(tr),
)
}
}