How Multi-Region Consensus Checks Eliminate False Uptime Alerts

A development team built a multi-region uptime monitoring system using Cloudflare Durable Objects to solve the long-standing problem of false outage alerts. Traditional monitors check endpoints from a single location, making it impossible to distinguish a real service failure from a network path issue between the prober and the server. The new architecture deploys seven geographically separated probe instances, each egressing from a different part of Cloudflare's network, and requires a quorum of them to agree before triggering an alert. A key design decision was treating probe results as three states — success, failure, or no answer — rather than a simple binary up/down, preventing inconclusive responses from skewing the verdict. The team notes that Cloudflare's pricing model made this consensus-based approach viable for small teams, whereas it previously required enterprise-level infrastructure budgets.