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Code Issues Activity

tracing: Add spanID field to access logs and http.vars.span_id placeholder (#6646)

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* logging: Add spanID field to access logs when tracing is enabled

Signed-off-by: YifanYang6 <yifanyang6@link.cuhk.edu.cn>

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

Signed-off-by: YifanYang6 <yifanyang6@link.cuhk.edu.cn>

---------

Signed-off-by: YifanYang6 <yifanyang6@link.cuhk.edu.cn>
This commit is contained in:
Yifan Yang 2024-10-22 01:06:55 +08:00 committed by GitHub
parent 0182fb87fa
commit 669fc41e63
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GPG key ID: B5690EEEBB952194
2 changed files with 11 additions and 4 deletions
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9
modules/caddyhttp/server_test.go
View file

@ -69,12 +69,13 @@ func TestServer_LogRequest(t *testing.T) {
}`, buf.String())
}
func TestServer_LogRequest_WithTraceID(t *testing.T) {
func TestServer_LogRequest_WithTrace(t *testing.T) {
s := &Server{}
extra := new(ExtraLogFields)
ctx := context.WithValue(context.Background(), ExtraLogFieldsCtxKey, extra)
extra.Add(zap.String("traceID", "1234567890abcdef"))
extra.Add(zap.String("spanID", "12345678"))
req := httptest.NewRequest(http.MethodGet, "/", nil).WithContext(ctx)
rec := httptest.NewRecorder()
@ -93,7 +94,8 @@ func TestServer_LogRequest_WithTraceID(t *testing.T) {
"msg":"handled request", "level":"info", "bytes_read":0,
"duration":"50ms", "resp_headers": {}, "size":0,
"status":0, "user_id":"",
"traceID":"1234567890abcdef"
"traceID":"1234567890abcdef",
"spanID":"12345678"
}`, buf.String())
}
@ -144,12 +146,13 @@ func BenchmarkServer_LogRequest_NopLogger(b *testing.B) {
}
}
func BenchmarkServer_LogRequest_WithTraceID(b *testing.B) {
func BenchmarkServer_LogRequest_WithTrace(b *testing.B) {
s := &Server{}
extra := new(ExtraLogFields)
ctx := context.WithValue(context.Background(), ExtraLogFieldsCtxKey, extra)
extra.Add(zap.String("traceID", "1234567890abcdef"))
extra.Add(zap.String("spanID", "12345678"))
req := httptest.NewRequest(http.MethodGet, "/", nil).WithContext(ctx)
rec := httptest.NewRecorder()

6
modules/caddyhttp/tracing/tracer.go
View file

@ -88,11 +88,15 @@ func (ot *openTelemetryWrapper) serveHTTP(w http.ResponseWriter, r *http.Request
spanCtx := trace.SpanContextFromContext(ctx)
if spanCtx.IsValid() {
traceID := spanCtx.TraceID().String()
spanID := spanCtx.SpanID().String()
// Add a trace_id placeholder, accessible via `{http.vars.trace_id}`.
caddyhttp.SetVar(ctx, "trace_id", traceID)
// Add the trace id to the log fields for the request.
// 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))
extra.Add(zap.String("spanID", spanID))
}
}
next := ctx.Value(nextCallCtxKey).(*nextCall)