Customize "OPEN IN GRAFANA" widget in Google Chat about alerting

[JacobsonMT]

This change is likely caused by the automatic upgrade to Unified Alerting in 9.x. It should be possible to template the direct link to the alert by using the {{ .GeneratorURL }} field of an individual alert. Something like:

{{ range .Alerts }}
{{ .GeneratorURL }}
{{ end }}

Or if you know the alerts are all from the same rule you can just use the first one:

{{ (index .Alerts 0).GeneratorURL }}

You can find more information here: https://grafana.com/docs/grafana/latest/alerting/configure-notifications/template-notifications/

If this isn't enough we can consider creating a feature request to have this value in the default template similar to Slack.

[williancolognesitrimble]

This change is likely caused by the automatic upgrade to Unified Alerting in 9.x. It should be possible to template the direct link to the alert by using the {{ .GeneratorURL }} field of an individual alert. Something like:

I'm talking about the button that's currently hardcoded in Google Chat receiver https://github.com/grafana/alerting/blob/main/receivers/googlechat/googlechat.go#L67

The workaround to put a link in the alert message is ok, but having a way to customize the button url would be better (to keep the previous behaviour)