How to display host lable in alerting

Grafana Alerting
, ,
1

Grafana version:v9.2.4

I am using grafana to send an alerting message to slack, and I can get the value of the lable of host in the description:

Values:
{{ with $values }}
{{ range $k, $v := . }}

  host: 
{{ $v.Labels.host }}
 uptime:  
{{ $v.Value | printf "%.0f" }} 
{{ end }}
{{ end }}

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image1238×1144 124 KB

I want it to display the label of the host when it is alerting, so that I can only silence the alert rule of host=xxx instead of all the memory alerting of all the host.
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image2654×1080 174 KB

2

Hi! You will either need to create a custom label called Host, or get your datasource to return a Host label. It looks like you might have some of this information available looking at the Description annotation, can you share the template for it?

3

Thank your reply.
Yes,I can add a host label, but this alert rule contains multiple servers, and I’m not sure how to set the value of this host as a variable.

And the follow is my message template:

{{ define "default.alert" }}
  Labels:
  {{- range .Labels.SortedPairs }}
    `{{ .Name }}`: {{ .Value -}}
  {{ end }}

  {{- if gt (len .Annotations) 0 }}
  Annotations:
  {{- range .Annotations.SortedPairs }}
    `{{ .Name }}`: {{ .Value -}}
  {{ end }}
  {{ end -}}

  {{ if gt (len .SilenceURL ) 0 }}- <{{ .SilenceURL }}|Silence Alert> {{ end }}
  {{ if gt (len .DashboardURL ) 0 }}- <{{ .DashboardURL }}|Dashboard> {{ end }}
  {{ if gt (len .PanelURL) 0 }}- <{{ .PanelURL }}|Panel> {{ end }}
  {{ if gt (len .GeneratorURL) 0 }}- <{{ .GeneratorURL }}|Generator> {{ end }}
{{ end }}

I’m not sure how it get the host label in the description.

4

Hi! With multi-dimensional alerting, provided each server has a different host or instance label, then each server will create a separate alert. All alerts have their own set of labels and annotations which you print in your default.alert template.

The Host should be set as a Custom Label or an annotation in your alert rule. Your message template doesn’t need to be changed as it prints all labels and annotations for every alert.