nuvolaris/templates/alert-manager-02-cm.yaml

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apiVersion: v1
kind: ConfigMap
metadata:
  annotations:
    meta.helm.sh/release-name: nuvolaris-prometheus
    meta.helm.sh/release-namespace: nuvolaris  
  labels:
    app.kubernetes.io/instance: nuvolaris-prometheus    
    app.kubernetes.io/name: alertmanager
  name: nuvolaris-prometheus-alertmanager
  namespace: nuvolaris
data:
  alertmanager.yml: |
    global:
      {% if slack %}
      slack_api_url: '{{slack_api_url}}'
      {% endif %}

    receivers:
    {% if gmail %}
    - name: email-receiver
      email_configs:
      - to: '{{email_recipients}}'
        from: '{{email_from}}'
        smarthost: smtp.gmail.com:587
        auth_username: '{{gmail_username}}'
        auth_identity: '{{gmail_username}}'
        auth_password: '{{gmail_password}}'
    {% endif %}      
    
    {% if slack %}
    - name: slack-notifications
      slack_configs:
      - channel: '{{slack_channel_name}}'
        send_resolved: true
        icon_url: https://avatars3.githubusercontent.com/u/3380462
        {% raw %}
        title: |-
          [{{ .Status | toUpper }}{{ if eq .Status "firing" }}:{{ .Alerts.Firing | len }}{{ end }}] {{ .CommonLabels.alertname }} for {{ .CommonLabels.job }}
          {{- if gt (len .CommonLabels) (len .GroupLabels) -}}
            {{" "}}(
            {{- with .CommonLabels.Remove .GroupLabels.Names }}
              {{- range $index, $label := .SortedPairs -}}
                {{ if $index }}, {{ end }}
                {{- $label.Name }}="{{ $label.Value -}}"
              {{- end }}
            {{- end -}}
            )
          {{- end }}
        text: >-
          {{ range .Alerts -}}
          *Alert:* {{ .Annotations.title }}{{ if .Labels.severity }} - `{{ .Labels.severity }}`{{ end }}
          {{ if .Annotations.description }}
          *Description:* {{ .Annotations.description }}
          {{ end }}
          *Details:*
            {{ range .Labels.SortedPairs }} • *{{ .Name }}:* `{{ .Value }}`
            {{ end }}
          {{ end }}
        {% endraw %}
    {% endif %}    

    route:
      group_interval: 5m
      group_wait: 10s
      {% if slack and slack_default %}
      receiver: slack-notifications
      {% endif %}
      {% if gmail and gmail_default %}
      receiver: email-receiver
      {% endif %}      
      repeat_interval: 10m

      {% if slack or gmail %}
      # All the above attributes are inherited by all child routes and can
      # overwritten on each.
      routes:
        {% if slack %}
        - receiver: slack-notifications
          group_wait: 10s
          match_re:
            severity: critical|warning
          continue: true
        {% endif %}  

        {% if gmail %}
        - receiver: email-receiver
          group_wait: 10s
          match_re:
            severity: critical
          continue: true            
        {% endif %}  
      {% endif %}        

    templates:
    - /etc/alertmanager/*.tmpl