Application Metrics

RoadRunner server includes an embedded metrics server based on Prometheus.

#Enable Metrics

To enable metrics add metrics section to your configuration:

metrics:
  address: localhost:2112

Once complete you can access Prometheus metrics using http://localhost:2112/metrics url.

RoadRunner will expose default http and limit server metrics automatically.

#Custom application metrics

You can also publish application-specific metrics using an RPC connection to the server. First, you have to register a metric in your configuration file:

metrics:
  address: localhost:2112
  collect:
    app_metric_counter:
      type: counter
      help: "Application counter."

To send metric from the application:

$rpc = new Spiral\Goridge\RPC(new Spiral\Goridge\SocketRelay("127.0.0.1", 6001));

$metrics = new Spiral\RoadRunner\Metrics($rpc);
$metrics->add('app_metric_counter', 1);

Supported types: gauge, counter, summary, histogram.

#Tagged metrics

You can use tagged (labels) metrics to group values:

metrics:
  address: localhost:2112
  collect:
    app_type_duration:
      type: histogram
      help: "Application counter."
      labels: ["type"]

You should specify values for your labels while pushing the metric:

$rpc = new Spiral\Goridge\RPC(new Spiral\Goridge\SocketRelay("127.0.0.1", 6001));

$metrics = new Spiral\RoadRunner\Metrics($rpc);
$metrics->add('app_type_duration', 0.5, ['some-type']);