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tracing: add http.vars.span_id placeholder when tracing is enabled

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Signed-off-by: YifanYang6 <yifanyang6@link.cuhk.edu.cn>
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YifanYang6 2024-10-19 17:03:52 +08:00
parent 926e36959e
commit 9ff96824d3
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1 changed files with 2 additions and 0 deletions
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modules/caddyhttp/tracing/tracer.go
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@ -91,6 +91,8 @@ func (ot *openTelemetryWrapper) serveHTTP(w http.ResponseWriter, r *http.Request
spanID := spanCtx.SpanID().String()
// Add a trace_id placeholder, accessible via `{http.vars.trace_id}`.
caddyhttp.SetVar(ctx, "trace_id", traceID)
// Add a span_id placeholder, accessible via `{http.vars.span_id}`.
caddyhttp.SetVar(ctx, "span_id", spanID)
// Add the traceID and spanID to the log fields for the request.
if extra, ok := ctx.Value(caddyhttp.ExtraLogFieldsCtxKey).(*caddyhttp.ExtraLogFields); ok {
extra.Add(zap.String("traceID", traceID))