How to get the unique value from annotations in grafana alerting template

Grafana Alerting
,
1

Hi guys, Currently I am using the following template to show only datasource errors from my grafana instance.

  {{ range .Alerts.Firing }}
  {{ if gt (len .Annotations) 0 }}
  {{ .Annotations.Error }}
  {{ end }}
  {{ end }}

which gives the alerts as the following output

[plugin.downstreamError] failed to query data: Post "https://grafanaurl:3000/api/v1/query_range": dial tcp ip:3000: connect: connection refused

[plugin.downstreamError] failed to query data: Post "https://grafanaurl:3000/api/v1/query_range": dial tcp ip:3000: connect: connection refused

[plugin.downstreamError] failed to query data: Post "https://grafanaurl:3000/api/v1/query_range": dial tcp ip:3000: connect: connection refused

It’s basically showing error for each alert rule as I have currently three alert rules. Now I want to show only unique value of .Annotations.Error . that means from three alert rules if the errors are the same then only one error will be printed. So the above message will only be sent once. How can I achieve that guys? Thanks.

2

You could use the .CommonAnnotations property in the Notification data object, which includes the common annotations to all alerts in the notification.

{{ .CommonAnnotations.Error }}