Slack template

alert.txt

{{ define "alert" }}
{{ if eq .Status "firing" }}:fire: {{ else }}:white_check_mark: {{ end -}}
*{{ .Labels.alertname }}* {{ if .Annotations.summary }} ({{ .Annotations.summary }}){{ end }}
{{- if eq .Status "firing" }}
> ```{{ .ValueString}}```
{{- end -}}
{{- if gt (len .Labels) 1 }}
> {{ range .Labels.SortedPairs }} *{{ .Name }}:* {{ .Value }}  {{ end }}
{{ end }}
{{- if gt (len .Annotations) 0 }}
> {{ range .Annotations.SortedPairs }} *{{ .Name }}:* {{ .Value }}  {{ end }}
{{ end -}}
>  {{ if gt (len .GeneratorURL ) 0 }}<{{ .GeneratorURL }}|:pencil2: Alert>{{ end }}       {{ if gt (len .SilenceURL ) 0 }}<{{ .SilenceURL }}|:no_bell: Silence>{{ end }}      {{ if gt (len .DashboardURL ) 0 }}<{{ .DashboardURL }}|:earth_americas: Dashboard>{{ end }}      {{ if gt (len .PanelURL ) 0 }}<{{ .PanelURL }}|:bar_chart: Panel>{{ end }}
{{ end }}

message.txt

{{ define "message" }}
  {{- if gt (len .Alerts.Firing) 0 -}}
    {{ len .Alerts.Firing }} firing:
    {{- range .Alerts.Firing -}} {{ template "alert" .}} {{- end -}}
  {{ end }}
  {{- if gt (len .Alerts.Resolved) 0 -}}
    {{ len .Alerts.Resolved }} resolved:
    {{- range .Alerts.Resolved -}} {{ template "alert" .}} {{- end -}}
  {{ end }}
{{ end }}