tracing

Documentation

Overview

Package tracing is responsible for forwarding and translating span headers for internal requests

Index

• Constants
• func HTTPMiddleware(h http.Handler) http.Handler
• func HeaderMatcher(key string) (string, bool)
• func New(service string, host string, zipkinEndpoint string) io.Closer
• func NewFromEnv(service string, host string, endpointVar, disableVar string) io.Closer
• func NewSpanContext(ctx context.Context, operationName string) (opentracing.Span, context.Context)
• func NewTracer() io.Closer
• func StartSpanFromContext(ctx context.Context, name string, options ...opentracing.StartSpanOption) (opentracing.Span, context.Context)
• func TraceIDFromContext(ctx context.Context) string

Constants

const (
	TraceID = prefixTracerState + "traceid"
)

Functions

func HTTPMiddleware

func HTTPMiddleware(h http.Handler) http.Handler

func HeaderMatcher

func HeaderMatcher(key string) (string, bool)

HeaderMatcher ensures that open tracing headers x-b3-* are forwarded to output requests

func New

func New(service string, host string, zipkinEndpoint string) io.Closer

New initialises tracing uses zipkin client tracer

func NewFromEnv

func NewFromEnv(service string, host string, endpointVar, disableVar string) io.Closer

NewFromEnv initialises tracing and returns a closer if tracing is configured. If the necessary configuration is not available it is Fatal unless disableVar is set and is truthy (strconf.ParseBool -> true). If tracing is disabled returns nil

func NewSpanContext

func NewSpanContext(ctx context.Context, operationName string) (opentracing.Span, context.Context)

func NewTracer

func NewTracer() io.Closer

func StartSpanFromContext

func StartSpanFromContext(ctx context.Context, name string, options ...opentracing.StartSpanOption) (opentracing.Span, context.Context)

func TraceIDFromContext

func TraceIDFromContext(ctx context.Context) string