How does the Prometheus system handle alerting and alarm management?

The Prometheus system uses Alertmanager for alert and alarm management. Alertmanager is a standalone component that processes alerts from the Prometheus server, categorizes, de-duplicates, groups, and routes these alerts based on predefined rules. Alertmanager can also send alert notifications through various methods such as email, Slack, PagerDuty, etc.

Specifically, the process for alerting and managing alerts in the Prometheus system is as follows:

1. Prometheus server monitors targets and generates alerts based on predefined rules.
2. The alert has been dispatched to the Alertmanager.
3. Alertmanager handles incoming alerts by categorizing, deduplicating, grouping, and routing them.
4. Alertmanager sends alert notifications to specified receivers according to the configured notification method.
5. The recipient received the alert notification and took appropriate action.

Alertmanager in Prometheus allows for flexible and efficient alert management, helping users promptly detect and resolve issues within the system.