Alerting

Monitra emits an alert when a monitor’s evaluated status changes. The engine formats a transition message, passes it to the configured notifier, and records an alert event with the monitor ID, new status, time, attempted sink, and delivery outcome.

monitra alert list

The default notifier logs messages. A configured webhook://hooks.example.com/path sends a JSON message over HTTPS. With the slack Cargo feature, slack://hooks.example.com/services/path sends a Slack text payload. See Providers.

The alert request channel holds 256 entries; if full, it drops the newest request and logs a warning. The notifier retry queue also holds 256 entries; on overflow it drops the oldest and logs it. Failed deliveries are recorded as queued for retry, with retries on a 30-second interval. Alert history remains queryable even when delivery fails. monitra alert list shows all recorded events, newest first; monitor detail also has per-monitor alert history.