Hello Brian,
I have edited the default template as below.
{{ define "__subject" }}[{{ if eq .Status "firing" }} "DOWN" {{ else }}
"UP" {{ end }}] {{ .GroupLabels.SortedPairs.Values | join " " }} {{ if gt
(len .CommonLabels) (len .GroupLabels) }}({{ with .CommonLabels.Remove
.GroupLabels.Names }}{{ .Values | join " " }}{{ end }}){{ end }}{{ end }}
{{ define "__description" }}{{ end }}
But am getting the below error.
./amtool check-config /home/sam_r/alertmanager.yml
Checking '/home/snr_r/alertmanager.yml' SUCCESS
Found:
- global config
- route
- 0 inhibit rules
- 2 receivers
- 1 templates
FAILED: template: statuspal.tmpl:4: function "DOWN" not defined
amtool: error: failed to validate 1 file(s)
Could you please help me?
Best Regards,
Suman
On Friday, November 19, 2021 at 3:03:08 PM UTC+5:30 Brian Candler wrote:
> To replace any header with a new template, follow the documentation of
> email_config here
> <https://prometheus.io/docs/alerting/latest/configuration/#email_config>.
>
> # Further headers email header key/value pairs. Overrides any headers #
> previously set by the notification implementation. [ headers: { <string>
> <https://prometheus.io/docs/alerting/latest/configuration/#string>:
> <tmpl_string>
> <https://prometheus.io/docs/alerting/latest/configuration/#tmpl_string>,
> ... } ]
>
> The default value comes from here
> <https://github.com/prometheus/alertmanager/blob/main/template/default.tmpl#L80>
> which
> sets:
> {{ define "email.default.subject" }}{{ template "__subject" . }}{{ end }}
> That is, if you don't override it, then it uses the value of the
> "__subject" variable, the definition of which I pointed you to before.
>
> On Friday, 19 November 2021 at 06:58:08 UTC [email protected] wrote:
>
>>
>> Hi Brian,
>>
>> Thanks for you inputs. Could you please help me where to add in and what
>> to modify in the below line of code to get the email subject with the
>> keyword "DOWN" for firing alerts and "UP" for resolved alerts.
>>
>> {{ define "__subject" }}[{{ .Status | toUpper }}{{ if eq .Status "firing"
>> }}:{{ .Alerts.Firing | len }}{{ end }}] {{ .GroupLabels.SortedPairs.Values
>> | join " " }} {{ if gt (len .CommonLabels) (len .GroupLabels) }}({{ with
>> .CommonLabels.Remove .GroupLabels.Names }}{{ .Values | join " " }}{{ end
>> }}){{ end }}{{ end }}
>>
>> Best Regards,
>> Suman
>> On Thursday, November 18, 2021 at 5:24:53 PM UTC+5:30 Brian Candler wrote:
>>
>>> This is already done for you. With the default templates, the subject
>>> line has a prefix like [FIRING:2] or [RESOLVED].
>>>
>>> However if your alerts are being grouped, and let's say one alert
>>> resolves, then you might then get an E-mail with subject [FIRING:1] which
>>> shows one alert still firing and one alert resolved. That is: a single
>>> E-mail may contain both "DOWN" and "UP" notifications.
>>>
>>> You can change the templates if you like. There is documentation here
>>> <https://prometheus.io/docs/alerting/latest/notifications/>. The
>>> default subject line is created here
>>> <https://github.com/prometheus/alertmanager/blob/main/template/default.tmpl#L4>
>>> and
>>> you can override this with your own template string.
>>>
>>> But to be honest, I've switched off all "resolved" notifications now.
>>> There's a good explanation why here:
>>>
>>> https://www.robustperception.io/running-into-burning-buildings-because-the-fire-alarm-stopped
>>>
>>> In short: the fact that an alert condition has ceased is not an excuse
>>> to your staff to say "oh that's OK, the problem has gone; I can ignore it
>>> now". There *was* a problem and it *still* needs to be investigated. You
>>> can use an alert to open a ticket, but you should close the ticket manually.
>>>
>>> This document is also *very* well worth reading:
>>>
>>> https://docs.google.com/document/d/199PqyG3UsyXlwieHaqbGiWVa8eMWi8zzAn0YfcApr8Q/edit
>>>
>>> On Thursday, 18 November 2021 at 08:54:08 UTC [email protected] wrote:
>>>
>>>> Hi Team,
>>>>
>>>> I want to set the subject line in alertmanager based on send_resolved
>>>> status. I mean before resolving the alert subject line should be "DOWN"
>>>> and
>>>> after resolving the alert subject line should be set to "UP".
>>>>
>>>> Could someone please guide me how to achieve this or provide me syntax
>>>> please?
>>>>
>>>> Best Regards,
>>>> Sriman
>>>>
>>>
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