GreptimeDB Trigger Guide

Enterprise only. Triggers are available only in GreptimeDB Enterprise. For open-source deployments, fall back to Prometheus Alertmanager or an external scheduler.

Create GreptimeDB trigger definition as an alternative to Prometheus alerting rules. A trigger periodically runs a query — a SQL SELECT or a TQL EVAL block wrapping a PromQL expression — and turns each result row into an alert instance. Most concepts from Prometheus alerting rules map directly onto trigger DDL, and existing PromQL rules can be hosted as-is through TQL EVAL.

The workflow

To create a GreptimeDB trigger, we should follow these phases:

Phase 1. Understanding GreptimeDB Trigger

First, we should read the trigger reference from the documentation.