Monitoring

📄️ OpenMetrics (e.g. Prometheus)

OpenMetrics is an open standard for exposing metrics data (numerical time series) in a text-based format over HTTP. Originally developed by the Prometheus community, several other observability platforms also accept this format, including Grafana Mimir, VictoriaMetrics, Thanos, InfluxDB, Datadog, and New Relic.

📄️ Custom metrics

Halon has a comprehensive set of standard metrics that are presented in OpenMetrics format.

📄️ Monitoring with Slack

You can use Slack to monitor for events that happen on the Halon MTA, like when rate limits are exceeded for example.

📄️ Monitoring with Amazon CloudWatch

This article describes how to configure Halon Engage & Protect (runnning in an EC2 instance) to publish custom metrics such as queue sizes to Amazon CloudWatch.