Prometheus is a robust monitoring and alerting system widely used in cloud-native and Kubernetes environments. One of the critical features of Prometheus is its ability to create and trigger alerts based on metrics it collects from various sources. Additionally, you can analyze and filter the metrics to develop:
Complex incident response algorithms
Service Level Objectives
Error budget calculations
Post-mortem analysis or retrospectives
Runbooks to resolve common failures
In this article, we look at Prometheus alert rules in detail. We cover alert template fields, the proper syntax for writing a rule, and several Prometheus sample alert rules you can use as is. Additionally, we also cover some challenges and best practices in Prometheus alert rule management and response.