monitoring

import pandas as pd
from sklearn.ensemble import IsolationForest

df = pd.read_csv('service_metrics.csv')
features = df[['latency_p95', 'error_rate', 'throughput', 'cpu_utilization']]

# Grafana provisioning: datasources
# /etc/grafana/provisioning/datasources/prometheus.yml
apiVersion: 1
datasources:
  - name: Prometheus
    type: prometheus

require "timeout"

module HealthCheck
  class Probe
    Result = Struct.new(:name, :status, :latency_ms, :critical, :error, keyword_init: true) do
      def healthy?

import { onCLS, onINP, onLCP, onFCP, onTTFB, type Metric } from 'web-vitals';

export interface VitalPayload {
  id: string;
  name: Metric['name'];
  value: number;

import { Registry, Histogram, Counter, collectDefaultMetrics } from 'prom-client';

export const register = new Registry();

collectDefaultMetrics({ register });

-- Enable pg_stat_statements extension
CREATE EXTENSION IF NOT EXISTS pg_stat_statements;

-- postgresql.conf:
-- shared_preload_libraries = 'pg_stat_statements'
-- pg_stat_statements.track = all

import requests

response = requests.get('https://crt.sh/', params={'q': '%.example.com', 'output': 'json'}, timeout=15)
response.raise_for_status()
certs = response.json()
print(certs[:5])

import * as Sentry from "@sentry/react";

const environment = import.meta.env.VITE_ENVIRONMENT ?? "development";
const isProd = environment === "production";

export function initSentry(): void {

class ExternalApiClient
  def fetch_user_data(user_id)
    ActiveSupport::Notifications.instrument(
      'api.external_service',
      service: 'user_service',
      operation: 'fetch_user',

package com.example.demo.service;

import io.micrometer.core.instrument.Counter;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.Timer;
import org.springframework.stereotype.Service;

-- Connection statistics
SELECT
  count(*) AS total_connections,
  count(*) FILTER (WHERE state = 'active') AS active,
  count(*) FILTER (WHERE state = 'idle') AS idle,
  count(*) FILTER (WHERE state = 'idle in transaction') AS idle_in_tx,

# Prometheus configuration
global:
  scrape_interval: 15s
  evaluation_interval: 15s
  scrape_timeout: 10s