Grafana Discord Component Custom Webhook Implementation

grafana-discord-components.tpl

{{- /* Create a custom webhook, and point it to your Discord webhook, make sure you append ?with_components=true to your webhook */ -}}

{{ define "__discord_values_list" }}{{ if len .Values }}{{ $first := true }}{{ range $refID, $value := .Values -}}
{{ if $first }}{{ $first = false }}{{ else }}, {{ end }}{{ $refID }}={{ $value }}{{ end -}}
{{ else }}[no value]{{ end }}{{ end }}

{{ define "__discord_labels_list" }}{{ if len .Values }}{{ $first := true }}{{ range $refID, $value := .Labels -}}
{{ if $first }}{{ $first = false }}{{ else }}, {{ end }}{{ $refID }}={{ $value }}{{ end -}}
{{ else }}[no value]{{ end }}{{ end }}

{{ define "discord.payload" -}}
  {{ coll.Dict
  "flags" 32768
  "components" (tmpl.Exec "discord.payload.alerts" .Alerts | data.JSON)
  | data.ToJSONPretty " "}}
{{- end }}

{{ define "discord.payload.alerts" -}}
  {{- $alerts := coll.Slice -}}
  
  {{- range . -}}

    {{ if eq .Status "firing" }}
      {{ $accent_color := 16711680 }}
    {{ else }}
      {{ $accent_color := 65280 }}
    {{ end }}

    {{ $alerts = coll.Append (coll.Dict
    "type" 17
    "accent_color" 65280
    "components" (tmpl.Exec "discord.payload.alert" . | data.JSON)
    ) $alerts}}
  {{- end -}}
  {{- $alerts | data.ToJSON -}}
{{- end }}

{{ define "discord.payload.alert" -}}
  {{- $alert := coll.Slice -}}

  {{ if .Annotations.summary}}
    {{ if eq .Status "firing" }}
      {{ $alert = coll.Append (coll.Dict
      "type" 10
      "content" (tmpl.Inline "## Alert: {{.Annotations.summary}}" .)
      ) $alert}}
    {{ else }}
      {{ $alert = coll.Append (coll.Dict
      "type" 10
      "content" (tmpl.Inline "## Resolved: {{.Annotations.summary}}" .)
      ) $alert}}
    {{ end }}
  {{else}}
    {{ if eq .Status "firing" }}
      {{ $alert = coll.Append (coll.Dict
      "type" 10
      "content" "## Alert"
      ) $alert}}
    {{ else }}
      {{ $alert = coll.Append (coll.Dict
      "type" 10
      "content" "## Resolved"
      ) $alert}}
    {{ end }}
  {{ end }}

  {{ $alert = coll.Append (coll.Dict
  "type" 10
  "content" (tmpl.Inline "-# Values: {{ template \"__discord_values_list\" . }}" .)
  ) $alert}}

  {{ $alert = coll.Append (coll.Dict
  "type" 10
  "content" (tmpl.Inline "-# Labels: {{ template \"__discord_labels_list\" . }}" .)
  ) $alert}}

  {{ $alert = coll.Append (coll.Dict
  "type" 1
  "components" (tmpl.Exec "discord.payload.alert.buttons" . | data.JSON)
  ) $alert}}
  {{- $alert | data.ToJSON -}}
{{- end }}

{{ define "discord.payload.alert.buttons" }}
  {{- $buttons := coll.Slice -}}

  {{- /* GeneratorURL typically is only the query params and Discord will reject it. */ -}}
  
  {{ if .SilenceURL }}
      {{ $buttons = coll.Append (coll.Dict
      "type" 2
      "style" 5
      "label" "Silence"
      "url" .SilenceURL
      ) $buttons}}
  {{ end -}}
  
  {{ if .DashboardURL }}
      {{ $buttons = coll.Append (coll.Dict
      "type" 2
      "style" 5
      "label" "Dashboard"
      "url" .DashboardURL
      ) $buttons}}
  {{ end -}}
  
  {{ if .PanelURL }}
      {{ $buttons = coll.Append (coll.Dict
      "type" 2
      "style" 5
      "label" "Panel"
      "url" .PanelURL
      ) $buttons}}
  {{ end -}}
  {{- $buttons | data.ToJSON -}}
{{ end }}

Alerts will look like this: