refactor: refactor trace in redis & sql & mongo (#1865)

* refactor: refactor tracing in redis & sql & mongo

Signed-off-by: chenquan <chenquan.dev@gmail.com>

* fix: fix some tests

Signed-off-by: chenquan <chenquan.dev@gmail.com>

* refactor: add missing content

Signed-off-by: chenquan <chenquan.dev@gmail.com>

* refactor: adjust `log` and `return`

Signed-off-by: chenquan <chenquan.dev@gmail.com>

* refactor: reformat code

Signed-off-by: chenquan <chenquan.dev@gmail.com>

* refactor: reformat code

Signed-off-by: chenquan <chenquan.dev@gmail.com>

* refactor: reformat code

Signed-off-by: chenquan <chenquan.dev@gmail.com>

* refactor: simpler span name

Signed-off-by: chenquan <chenquan.dev@gmail.com>

* refactor: fix a bug

Signed-off-by: chenquan <chenquan.dev@gmail.com>

* refactor: fix a bug

Signed-off-by: chenquan <chenquan.dev@gmail.com>

core/stores/mon/trace.go

@@ -0,0 +1,37 @@
+package mon
+
+import (
+	"context"
+
+	"github.com/zeromicro/go-zero/core/trace"
+	"go.mongodb.org/mongo-driver/mongo"
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/codes"
+	oteltrace "go.opentelemetry.io/otel/trace"
+)
+
+var mongoCmdAttributeKey = attribute.Key("mongo.cmd")
+
+func startSpan(ctx context.Context, cmd string) (context.Context, oteltrace.Span) {
+	tracer := otel.GetTracerProvider().Tracer(trace.TraceName)
+	ctx, span := tracer.Start(ctx,
+		spanName,
+		oteltrace.WithSpanKind(oteltrace.SpanKindClient),
+	)
+	span.SetAttributes(mongoCmdAttributeKey.String(cmd))
+	return ctx, span
+}
+
+func endSpan(span oteltrace.Span, err error) {
+	defer span.End()
+
+	if err == nil || err == mongo.ErrNoDocuments ||
+		err == mongo.ErrNilValue || err == mongo.ErrNilDocument {
+		span.SetStatus(codes.Ok, "")
+		return
+	}
+
+	span.SetStatus(codes.Error, err.Error())
+	span.RecordError(err)
+}