Laravel接入Prometheus

朱雀 2022-03-06 03:20 221阅读 0赞

在原有的基础上增加Counter计数器：

namespace App\Http\Middleware;
    
    use Closure;
    use Illuminate\Http\Request;
    use traumferienwohnungen\PrometheusExporter\Middleware\AbstractResponseTimeMiddleware;
    
    class PrometheusMonitor extends AbstractResponseTimeMiddleware
    {
        protected function getRouteNames()
        {
            $routeNames = [];
            foreach (\Route::getRoutes() as $route){
                $routeNames[] = '/'.ltrim($route->uri(), '/');
            }
            return $routeNames;
        }
    
        /**
         * Handle an incoming request.
         *
         * @param  \Illuminate\Http\Request  $request
         * @param  \Closure  $next
         * @return mixed
         */
        public function handle(Request $request, Closure $next)
        {
            if (defined('LARAVEL_START')){
                $start = LARAVEL_START;
            } elseif (defined('LUMEN_START')){
                $start = LUMEN_START;
            } else {
                $start = microtime(true);
            }
            $this->request = $request;
    
            /** @var \Illuminate\Http\Response $response */
            $response = $next($request);
    
            $route_name = $this->getRouteName();
            $method = $request->getMethod();
            $status = $response->getStatusCode();
    
            $duration = microtime(true) - $start;
            $duration_milliseconds = $duration * 1000.0;
            $this->countRequest($route_name, $method, $status, $duration_milliseconds);
    
            $this->initRequestMetrics($method, $status);
    
            return $response;
        }
    
        public function getRouteName(){
            return request()->getRequestUri();
        }
    
    
        public function initRequestMetrics($method, $status)
        {
            $namespace = config('prometheus_exporter.namespace_http_server');
    
            $labelNames = $this->getRequestCounterLabelNames();
    
            $name = 'request_wuc';
            $help = 'http_requests count';
            $counter = $this->registry->getOrRegisterCounter(
                $namespace, $name, $help, $labelNames
            );
    
            $counter->incBy(1, [$this->getRouteName(), $method, $status]);
        }
    }