PHP code example of ensi / laravel-prometheus

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

ensi / laravel-prometheus example snippets

# app/Providers/AppServiceProvider.php
public function boot() {
    Prometheus::counter('http_requests_count')->labels(['endpoint', 'code']);
    Prometheus::summary('http_requests_duration_seconds', 60, [0.5, 0.95, 0.99]);
}

# app/Http/Middleware/Telemetry.php
public function handle($request, Closure $next)
{
    $startTime = microtime(true);
    $response = $next($request);
    $endTime = microtime(true);
    
    Prometheus::update('http_requests_count', 1, [Route::current()?->uri, $response->status()]);
    Prometheus::update('http_requests_duration_seconds', $endTime - $startTime);
    
    return $response;
}

# config/prometheus.php
return [
    'default_bag' => '<bag-name>',
    'enabled' => env('PROMETHEUS_ENABLED', true),
    'app_name' => env('PROMETHEUS_APP_NAME', env('APP_NAME')),
    'bags' => [
        '<bag-name>' => [
            'namespace' => '<prometheus-namespace>',
            'route' => '<path-of-scrape-endpoint>',
            'basic_auth' => [
                'login' => env('PROMETHEUS_AUTH_LOGIN'),
                'password' => env('PROMETHEUS_AUTH_PASSWORD'),
            ],
            '<storage-type>' => [
                '<connection-parameters>'
            ],
            'label_middlewares' => [
                '<middleware-class>'
            ],
            'on_demand_metrics' => [
                '<on-demand-metric-class>'
            ]  
        ],
    ],
];

'memory' => true

'apcu' => [
    'prefix' => 'metrics'
]

'apcu-ng' => [
    'prefix' => 'metrics'
]

'redis' => [
    'host' => '127.0.0.1',
    'port' => 6379,
    'timeout' => 0.1,
    'read_timeout' => '10',
    'persistent_connections' => false,
    'password' => null,
    'prefix' => 'my-app',
    'bag' => 'my-metrics-bag'
]

'connection' => [
    'connection' => 'default',
    'bag' => 'default',
]

# app/Providers/AppServiceProvider.php
public function boot() {
    // создаём метрики в конкретном bag
    Prometheus::bag('business')->counter('orders_count')->labels(['delivery_type', 'payment_method'])
}

# app/Actions/CreateOrder.php
public function execute(Order $order) {
    // ...
    Prometheus::bag('business')->update('orders_count', 1, [$order->delivery_type, $order->payment_method]);
}

class TenantLabelMiddleware implements LabelMiddleware
{
    public function labels(): array
    {
        return ['tenant'];
    }

    public function values(): array
    {
        return [Tenant::curent()->id];
    }
}

# config/prometheus.php
return [
    // ...
    'bags' => [
        'default' => [
            // ...
            'label_middlewares' => [
                \App\System\TenantLabelMiddleware::class,
            ]
        ],
    ],
];

Prometheus::counter('http_requests_count')->labels(['endpoint', 'code']);
// ...
Prometheus::update('http_requests_count', 1, [Route::current()?->uri, $response->status()]);

class QueueLengthOnDemandMetric extends OnDemandMetric {
    public function register(MetricsBag $metricsBag): void
    {
        $metricsBag->gauge('queue_length');
    }

    public function update(MetricsBag $metricsBag): void
    {
        $metricsBag->update('queue_length', Queue::size());
    }
}

bash
php artisan vendor:publish --provider="Ensi\LaravelPrometheus\PrometheusServiceProvider"