Declarative HTTP, TCP, DNS, and ping checks with multi-environment support. Check metrics and pass/fail state available via Prometheus for visualization and alerting.

See demo/README.md for a demo.

Features

• Declarative YAML Configuration: Define checks with endpoints, assertions, and intervals in YAML.
• Multiple Check Types: HTTP, TCP, DNS, and ping checks supported.
• Multi-Environment Support: Run the same checks across prod, stage, dev, external, etc.
• Powerful Assertions: Uses CEL for asserting responses.
• Monitoring Integration: Check results are logged to stdout in JSON format and exposed as Prometheus metrics.

Configuration

See CONFIGURATION for detailed configuration instructions.

Commands

• evaluator - Run checks at their configured interval (default)
• evaluate-once <check-name> - Run a specific check once
• validate - Validate configuration file

Contributing

See CONTRIBUTING for details.