【1】display some metrics value in alert email
（1.1）如何在告警中让其显示多个值？且只显示 value
在rule 规则中
groups:
- name: example
rules:
- alert: Load alert
expr: node_load1 > 1
for: 5s
labels:
severity: page
annotations:
title: 'load1: {{ $value }}, load5: {{ printf node_load5{instance="%s"} $labels.instance | query | first | value }}, load15: {{ printf node_load15{instance="%s"} $labels.instance | query | first | value}}'
summary: High load
After configuring alertmanager and adding webhook_configs, I can capture the result of alert as following:
{"receiver":"default","status":"firing","alerts":[{"status":"firing","labels":{"alertname":"Load alert","instance":"127.0.0.1:9100","job":"prometheus","severity":"page"},"annotations":{"summary":"High load","title":"load1: 60.1494140625, load5: 38.009765625, load15: 23.18359375"},"startsAt":"2018-07-15T22:59:09.508199934+08:00","endsAt":"0001-01-01T00:00:00Z","generatorURL":"http://bogon:9090/graph?g0.expr=node_load1+%3E+1\u0026g0.tab=1"}],"groupLabels":{},"commonLabels":{"alertname":"Load alert","instance":"127.0.0.1:9100","job":"prometheus","severity":"page"},"commonAnnotations":{"summary":"High load","title":"load1: 60.1494140625, load5: 38.009765625, load15: 23.18359375"},"externalURL":"http://bogon:9093","version":"4","groupKey":"{}:{}"}
最后的结果：
We can get the values of load average in annotations:
load1: 60.1494140625, load5: 38.009765625, load15: 23.18359375
Afert receiving the message, we know the detail of load average in a machine.
（1.2）如何计算
【2】告警结果如何对应多个 lables？
案例：
如下图，我们可以发现使用率和剩余空间根本对不上，也就是说，报警的磁盘分区，和我们显示总空间的磁盘分区根本不是同一个
修改后：
报警的磁盘分区，和我们显示总空间的磁盘分区已经是同一个了；
修改代码：
description: 'mountpoint:{{ $labels.mountpoint }}，device:{{ $labels.device }}，当前使用率 {{ $value }}% ，总空间：{{ printf node_filesystem_size_bytes{fstype=~"ext.?|xfs",instance="%s",mountpoint="%s"}/1024/1024/1024 $labels.instance $labels.mountpoint | query | first | value }} GB ，当前剩余 {{ printf node_filesystem_free_bytes{fstype=~"ext.?|xfs",instance="%s"}/1024/1024/1024 $labels.instance | query | first | value }} GB '
【3】结果值如何保留2位小数？
代码参考：’Very High memory usage on {{ $labels.instance }}: {{ $value | printf “%.2f” }}%’,
双引号需要转义：如描图
结合本文如下图：
操作前后：
【参考文档】
官网：https://github.com/prometheus/alertmanager/issues/549
本文转自：https://www.cnblogs.com/zhuangzebo/p/9315540.html
Original: https://www.cnblogs.com/gered/p/16308854.html
Author: 郭大侠1
Title: alertmanger告警输出多个值
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