Metrics

Simple library that abstracts different metrics collectors. I find this necessary to have a consistent and simple metrics API that doesn't cause vendor lock-in.

It also ships with a Symfony Bundle. This is not a library for displaying metrics.

Currently supported backends:

• StatsD
• Zabbix
• Librato
• Null (Dummy that does nothing)

Installation

Using Composer:

{
    "require": {
        "beberlei/metrics": "*"
    }
}

API

You can instantiate clients:

<?php
$metrics = \Beberlei\Metrics\Factory::create('statsd');
\Beberlei\Metrics\Registry::set('name', $metrics);
\Beberlei\Metrics\Registry::setDefaultName('name');

$metrics = \Beberlei\Metrics\Registry::get('name');
$metrics = \Beberlei\Metrics\Registry::get();

You can measure stats:

<?php

$metrics = \Beberlei\Metrics\Registry::get('name');
$metrics->increment('foo.bar');
$metrics->decrement('foo.bar');

$start = microtime(true);
$diff  = microtime(true) - $start;
$metrics->timing('foo.bar', $diff);

$value = 1234;
$metrics->measure('foo.bar', $value);

Some backends defer sending and aggregate all information, make sure to call flush:

<?php

$metrics = \Beberlei\Metrics\Registry::get('name');
$metrics->flush();

There is a convenience functional API. It works with the registry names. If null is provided, the default registry entry is used.

<?php
require_once 'vendor/beberlei/metrics/src/Beberlei/Metrics/functions.php';

$registryName = 'name';

bmetrics_increment('foo.bar', $registryName);
bmetrics_decrement('foo.bar', null);
bmetrics_measure('foo.bar', $value, $registryName);
bmetrics_timing('foo.bar', $diff, null);

Configuration

<?php
$statsd = \Beberlei\Metrics\Factory::create('statsd');

$zabbix = \Beberlei\Metrics\Factory::create('zabbix', array(
    'hostname' => 'foo.beberlei.de',
    'server'   => 'localhost',
    'port'     => 10051,
));

$zabbixConfig = \Beberlei\Metrics\Factory::create('zabbix_file', array(
    'hostname' => 'foo.beberlei.de',
    'file'     => '/etc/zabbix/zabbix_agentd.conf'
));

$librato = \Beberlei\Metrics\Factory::create('librato', array(
    'hostname' => 'foo.beberlei.de',
    'username' => 'foo',
    'password' => 'bar',
));

$null = \Beberlei\Metrics\Factory::create('null');

Symfony Bundle Integration

Activate Bundle into Kernel:

<?php

class AppKernel extends Kernel
{
    public function registerBundles()
    {
        //..
        $bundles[] = new \Beberlei\Bundle\MetricsBundle\BeberleiMetricsBundle();
        //..
    }
}

Do Configuration:

# app/config/config.yml
beberlei_metrics:
    default: foo
    collectors:
        foo:
            type: statsd
        bar:
            type: zabbix
            hostname: foo.beberlei.de
            server: localhost
            port: 10051
        baz:
            type: zabbix_file
            hostname: foo.beberlei.de
            file: /etc/zabbix/zabbix_agentd.conf
        librato:
            type: librato
            username: foo
            password: bar

This adds collectors to the Metrics registry. The functions are automatically included in the Bundle class so that in your code you can just start using the convenience functions. Metrics are also added as services:

<?php
$metrics = $container->get('beberlei_metrics.collector.foo');