Prometheus Alert Manager -- Difference between group_wait, group_interval, and repeat_interval

Definition
group_interval：group_interval dictates how long to wait before sending notifications about new alerts that are added to a group of alerts that have been alerted on before。
repeat_interval：If there is nothing change in the Alert Group -- no new alert added or new old alert resolved, when will the next alert be sent out. 在Group没有发生更新的情况下重新发送通知的时间间隔

 

Test Setting
group_wait 1m
group_interval 10m
repeat_interval 60m
keep_firing_for 1d
Data Retention Period 2d

 

Testing Plan and Result

	Firing Time	1st Send Time	2nd Send Time	Last Send Time
Incident A	T0
Incident B	T0 + 30s	T1 = T0 + 1m / T0 + 10m?	T1 + 10m / T1 + 60m ?

	Firing Time	Send Time	2nd Send Time	Last Send Time
Incident A	T0	T0 + 1m
Incident B	T0 + 5m	T1 = T0 + 6m or T0 + 10m?

	Firing Time	Send Time	2nd Send Time	Last Send Time
Incident A	T0	T1 = T0 + 1m
Incident B	T0 + 5m	T2 = T1 + 5m or T1 + 10m?
Incident C	T0 + 30m	T3 = T0 +

 

Reference: 

Prometheus告警模型分析 - 姚灯灯! - 博客园

What’s the difference between group_interval, group_wait, and repeat_interval? – Robust Perception | Prometheus Monitoring Experts

Receiving alert more often then repeat interval · Issue #3326 · prometheus/alertmanager · GitHub