在 PHP 应用程序中使用 Prometheus 进行监控时,可以收集和跟踪多种指标
$histogram = $registry->getOrRegisterHistogram(
'http_request_duration_seconds',
'The duration of HTTP requests processed by the application.',
['method', 'route']
);
$startTime = microtime(true);
// ...处理请求...
$duration = microtime(true) - $startTime;
$histogram->observe($duration, ['GET', '/some/route']);
$gauge = $registry->getOrRegisterGauge(
'memory_usage_bytes',
'The amount of memory used by the application.'
);
// ...执行一些操作...
$memoryUsage = memory_get_usage();
$gauge->set($memoryUsage);
$counter = $registry->getOrRegisterCounter(
'exceptions_total',
'The total number of exceptions thrown by the application.',
['type']
);
try {
// ...执行可能抛出异常的代码...
} catch (Exception $e) {
$counter->inc(['MyCustomException']);
}
$histogram = $registry->getOrRegisterHistogram(
'db_query_duration_seconds',
'The duration of database queries executed by the application.',
['query']
);
$startTime = microtime(true);
// ...执行数据库查询...
$duration = microtime(true) - $startTime;
$histogram->observe($duration, ['SELECT * FROM users']);
$cacheHits = $registry->getOrRegisterCounter('cache_hits_total', 'The total number of cache hits.');
$cacheMisses = $registry->getOrRegisterCounter('cache_misses_total', 'The total number of cache misses.');
if ($cache->has($key)) {
$cacheHits->inc();
} else {
$cacheMisses->inc();
}
$gauge = $registry->getOrRegisterGauge(
'queue_length',
'The current length of the task queue.'
);
// ...获取队列长度(例如,从数据库或缓存中)...
$queueLength = getQueueLength();
$gauge->set($queueLength);
这些只是 Prometheus 在 PHP 应用程序中的一些基本监控指标。根据应用程序的需求和特点,可以根据需要收集更多指标。在实施监控时,请确保遵循最佳实践,例如使用有意义的指标名称和标签,以便于分析和警报。