feat: opentelemetry integration, removed self designed tracing (#1111)

* feat: opentelemetry integration, removed self designed tracing

* feat: support zipkin on opentelemetry integration

* feat: support zipkin on opentelemetry integration, enable it in conf

* style: format code

* fix: support logx without exporter configured

* fix: check return values

* refactor: simplify code

* refactor: simplify opentelemetry integration

* ci: fix staticcheck errors

core/logx/tracelogger.go

@@ -7,7 +7,6 @@ import (
 	"time"
 
 	"github.com/tal-tech/go-zero/core/timex"
-	"github.com/tal-tech/go-zero/core/trace/tracespec"
 	"go.opentelemetry.io/otel/trace"
 )
 
@@ -94,35 +93,19 @@ func WithContext(ctx context.Context) Logger {
 }
 
 func spanIdFromContext(ctx context.Context) string {
-	span := trace.SpanFromContext(ctx)
-	if span.IsRecording() {
-		spanCtx := span.SpanContext()
-		if spanCtx.IsValid() {
-			return spanCtx.SpanID().String()
-		}
+	spanCtx := trace.SpanContextFromContext(ctx)
+	if spanCtx.HasSpanID() {
+		return spanCtx.SpanID().String()
 	}
 
-	t, ok := ctx.Value(tracespec.TracingKey).(tracespec.Trace)
-	if !ok {
-		return ""
-	}
-
-	return t.SpanId()
+	return ""
 }
 
 func traceIdFromContext(ctx context.Context) string {
-	span := trace.SpanFromContext(ctx)
-	if span.IsRecording() {
-		spanCtx := span.SpanContext()
-		if spanCtx.IsValid() {
-			return span.SpanContext().TraceID().String()
-		}
+	spanCtx := trace.SpanContextFromContext(ctx)
+	if spanCtx.HasTraceID() {
+		return spanCtx.TraceID().String()
 	}
 
-	t, ok := ctx.Value(tracespec.TracingKey).(tracespec.Trace)
-	if !ok {
-		return ""
-	}
-
-	return t.TraceId()
+	return ""
 }