Alertmanager email template (help)
Jseb Tarot
Hello,
I'm trying to change the Alertmanager email template.
I can't seem to adapt an email template to make it work the way my boss wants. Personally, I find the default template to be quite good. However, my boss finds it a bit messy, which is not entirely untrue. In case of an issue, a misinterpretation can be dangerous, especially in a production environment! Anyway, I know that the template is in the binary of the prom/alertmanager container. However, it is possible to redefine the template to replace the default one. I've tested this method:
https://velenux.wordpress.com/2021/04/23/how-to-change-prometheus-alertmanager-e-mail-template/
And it works! But I must admit that, despite my efforts, I can't seem to modify this template because even the slightest error results in an empty email, but that's normal ;). I know that the developers have defined a large number of functions (https://prometheus.io/docs/alerting/latest/notifications/). So, in theory, we should be able to customize the templates. However, I don't know the list of variables I can use, nor the structure that the email template should have.
Can someone help me?
Thank you,
Best regards,
JsT
Adrian Popa
because it needs to be written in the Go templating language - which I
was unfamiliar with.
But - there is a way to "dump" all the attributes of the alert to
figure out what the structure is and how you can write the template. I
do this inside a hidden DIV inside the email, so I can view it if
necessary by looking at the source of the email:
```
<div name="GLOBAL DEBUG" style="display: none;">
<!-- Print the data structure we've been handed for
debugging -->
<br>
{{ printf "%#v" . }}
<br>
</div>
```
I generally don't use aggregation for email alerts, because I prefer
to see one email per alert.
I've linked my alertmanager/config/template-email-slack.tmpl , for
reference: https://pastebin.com/ufjyZJhm
I'd also like to learn how to best tune the email template.
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