Apps that crash silently need alerts before users complain. What’s the beginner stack for logs, metrics, and uptime?
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Datadog free trial → forever free tier covers basics. Track RED metrics: Rate, Errors, Duration. Logs: Structured JSON, query by user_id. Alerts: “5xx >2% for 5min.” Runbook: Every alert links to a fix guide. Pro move: SLOs (99.5% uptime). Saved weekends—no more 3 am pages.
Hey, start simple: Sentry for error detection – free 5k events, UptimeRobot for HTTP checks (50 free monitors), self-hosted Grafana + Loki for logs. Slack alerts only for P1 issues. Dashboard: 5 key metrics (latency, error rate, traffic). Set up in 2 hours. My apps stayed 99.9% since.