How to set the maximum number of alertmanager group_by

[long]

When I set up group_by in alertmanager.yml, I have an alert manager with 25 alerts, but it will be split into 3 messages each with a maximum of 10 alerts. How do I set the maximum number of alerts in 1 message?

my alertmanager.yml :

route:

  group_by: ['alertname']

  group_wait: 1m

  group_interval: 5m

  repeat_interval: 1h

  receiver: 'msteams'  

  routes:

    - receiver: msteams

      match_re:

        severity: .*

[Christian Hoffmann]

Hi,

On 7/17/20 5:26 AM, long wrote:
> When I set up group_by in alertmanager.yml, I have an alert manager with
> 25 alerts, but it will be split into 3 messages each with a maximum of
> 10 alerts. How do I set the maximum number of alerts in 1 message?

I haven't heard of an alertmanager-side limitation. Could it be that
this is done on your msteams integration side?

Kind regards,
Christian

[Julien Pivotto]

What you can do is set a max_alerts:

The maximum number of alerts to include in a single webhook message.
Alerts above this threshold are truncated.
https://prometheus.io/docs/alerting/latest/configuration/#webhook_config

But then the other alerts won't be sent, they will be dropped of the
webhook.


>
> Kind regards,
> Christian
>
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Julien Pivotto
@roidelapluie