增加链路对象参数 $request->tracer = $tracer;

[Tinywan]

自定义子链路案例

if(isset(request()->tracer) && isset(request()->rootSpan)){
    $exceptionSpan = request()->tracer->newChild(request()->rootSpan->getContext());
    $exceptionSpan->setName('exception');
    $exceptionSpan->start();
    $exceptionSpan->tag('error.code', (string) $errorCode);
    $value = [
        'event' => 'error',
        'message' => $errorMessage,
        'stack' => 'Exception:'.$e->getFile().'|'.$e->getLine(),
    ];
    $exceptionSpan->annotate(json_encode($value));
    $exceptionSpan->finish();
}