Replit Observability

Overview

Monitor Replit deployment health, track cold starts, measure resource usage, and set up alerting. Covers Replit's built-in monitoring, external health checking, structured logging, and integration with monitoring services.

Prerequisites

• Replit app deployed (Autoscale or Reserved VM)
• Health endpoint implemented (/health)
• External monitoring service (UptimeRobot, Better Stack, or Prometheus)

Instructions

Step 1: Health Endpoint with Detailed Metrics

// src/routes/health.ts — comprehensive health check
import { Router } from 'express';
import { pool } from '../services/postgres';