Q1 - yes, each route can have separate group_by section, as shown in the
documentation:
https://prometheus.io/docs/alerting/latest/configuration/#route-related-settings
Note that if you do
*group_by: [instance]*
then you'll get one Opsgenie alert group for an instance, even if there are
multiple problems with that instance. If you want to disable grouping
completely, put a string with three dots between the square brackets:
*group_by: ['...']*
Q2 - I don't see why you want to put {{ $labels.instance }} in the alert
name. It's then no longer the name of the alert, it's a combination of the
name of the alert and the name of the instance; and to analyze the data by
instance you'd have to parse it out of the alert.
Put it in the alert description instead.
> Having host name tag will be helpful and we can know via JIRA integration
that how many incidents have occured for a host in past.
Surely it would be better to do this is analysis with alert labels, and
from what I can see of the POST content you showed, Opsgenie calls these
"tags" rather than "labels".
> It seems the alert manager needs to send another PUT request for updating
the opsgenie tags.
Are you saying that the problem is that Alertmanager isn't updating the
tags? But if these tags come from CommonLabels, and the alerts are part of
a group, then the CommonLabels are by definition those which are common to
all the alerts in the group.
It seems to me that there are two meaningful alternatives. Either:
1. multiple alerts from Prometheus are in the same group (in which case,
it's a single alert as far as Opsgenie is concerned, and the tags are the
labels common to all alerts in the group); or
2. you send separate alerts from Prometheus, each with their own tags, and
then you analyze and/or group them Opsgenie-side.
If host-by-host incident analysis is what you want, then option (2) seems
to be the way to go.
What version of Alertmanager are you running? Looking in the changelogs I
don't see any particular recent changes, and I notice you're already using
"update_alerts: true", but I thought it was worth checking.
## 0.25.0 / 2022-12-22
* [ENHANCEMENT] Support templating for Opsgenie's responder type. #3060
## 0.24.0 / 2022-03-24
* [ENHANCEMENT] Add `update_alerts` field to the OpsGenie configuration to
update message and description when sending alerts. #2519
* [ENHANCEMENT] Add `entity` and `actions` fields to the OpsGenie
configuration. #2753
* [ENHANCEMENT] Add `opsgenie_api_key_file` field to the global
configuration. #2728
* [ENHANCEMENT] Add support for `teams` responders to the OpsGenie
configuration. #2685
## 0.22.0 / 2021-05-21
* [ENHANCEMENT] OpsGenie: Propagate labels to Opsgenie details. #2276
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