PromQL if/else like表达式
PromQL if/else like表达式
提问于 2020-10-05 16:21:57
我正在尝试使用 Gauss's Easter algorithm在PromQL中计算复活节星期天(我需要忽略一些公共假日的警报规则)。
我可以计算日期，但是月份有问题，因为我需要一个if/else表达式。如果东部时间在4月，我的记录规则easter_sunday_in_april返回1，如果时间在3月，则返回0。
(如何)我可以在PromQL中表达以下内容？
if(easter_sunday_in_april > 0)
return 4
else
return 3为了完整起见，我在这里附加了我的录制规则：
- record: a
expr: year(europe_time) % 4
- record: b
expr: year(europe_time) % 7
- record: c
expr: year(europe_time) % 19
- record: d
expr: (19*c + 24) % 30
- record: e
expr: (2*a + 4*b + 6*d + 5) % 7
- record: f
expr: floor((c + 11*d + 22*e)/451)
- record: easter_sunday_day_of_month_temp
expr: 22 + d +e - (7*f)
- record: easter_sunday_day_of_month_in_april
expr: easter_sunday_day_of_month_temp > bool 31
- record: easter_sunday_day_of_month
expr: easter_sunday_day_of_month_temp % 31回答 2
Stack Overflow用户
回答已采纳
发布于 2020-10-05 16:30:44
我想我找到了一个方法：
((easter_sunday_day_of_month_temp > bool 31 ) +3)easter_sunday_day_of_month_temp返回复活节周日月份的“原始”日期(1- 31 :三月的一天，四月的> 31天，我们必须计算模数31才能得到四月的日期)。
因此，如果easter_sunday_day_of_month_temp > bool 31为真，则返回1，然后我将3加到4(4月)，否则，我将返回3作为3月。
编辑:请证明我错了，或者给我一个更好的解决方案:-)否则我会在两天内接受我的方案。
Stack Overflow用户
发布于 2020-10-23 23:49:17
来自Julien Pivotto的PromCon talk：https://promcon.io/2019-munich/talks/improved-alerting-with-prometheus-and-alertmanager/
groups:
- name: Easter Meeus/Jones/Butcher Algorithm
interval: 60s
rules:
- record: easter_y
expr: year(belgium_localtime)
- record: easter_a
expr: easter_y % 19
- record: easter_b
expr: floor(easter_y / 100)
- record: easter_c
expr: easter_y % 100
- record: easter_d
expr: floor(easter_b / 4)
- record: easter_e
expr: easter_b % 4
- record: easter_f
expr: floor((easter_b +8 ) / 25)
- record: easter_g
expr: floor((easter_b - easter_f + 1 ) / 3)
- record: easter_h
expr: (19*easter_a + easter_b - easter_d - easter_g + 15 ) % 30
- record: easter_i
expr: floor(easter_c/4)
- record: easter_k
expr: easter_c%4
- record: easter_l
expr: (32 + 2*easter_e + 2*easter_i - easter_h - easter_k) % 7
- record: easter_m
expr: floor((easter_a + 11*easter_h + 22*easter_l) / 451)
- record: easter_month
expr: floor((easter_h + easter_l - 7*easter_m + 114) / 31)
- record: easter_day
expr: ((easter_h + easter_l - 7*easter_m + 114) %31) + 1
- record: public_holiday
expr: |
vector(1) and
day_of_month(belgium_localtime-86400) == easter_day
and month(belgium_localtime-86400) == easter_month
labels:
name: Easter Monday
- record: public_holiday
expr: |
vector(1) and
day_of_month(belgium_localtime-40*86400) == easter_day
and month(belgium_localtime-40*86400) == easter_month
labels:
name: Feast of the Ascension页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/64204913
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