Files
Checkmate/server
gorkem-bwl 84cac870d5 fix: set DNS cache TTL to prevent stale lookups
CacheableLookup defaults to maxTtl=Infinity, meaning successful DNS
lookups are cached forever until process restart. This causes monitors
to fail permanently if DNS changes or if a resolver outage causes
ENOTFOUND errors to persist after recovery.

Set maxTtl=300s (5 min) for successful lookups and errorTtl=30s for
failed lookups so the cache recovers automatically.
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Checkmate backend

The backend service for Checkmate, an open source uptime and infrastructure monitoring application

This directory contains the backend of Checkmate, which handles data processing, storage, and API services for the Checkmate monitoring tool. The backend is responsible for managing uptime checks, handling real-time alerts, and storing historical monitoring data.

Checkmate's backend is designed to be lightweight and scalable, ensuring reliable performance even with a high number of active monitors.

Installation & documentation

For setup instructions, configuration details, and deployment guidelines, please visit our official documentation at docs.checkmate.so.