Alertmanager Config Generator

1global:
2  resolve_timeout: 5m
3  smtp_smarthost: 'smtp.example.com:587'
4  smtp_from: 'alertmanager@example.com'
5  smtp_auth_username: 'alertmanager@example.com'
6  smtp_auth_password: 'password'
7  smtp_require_tls: true
8
9route:
10  receiver: 'slack-general'
11  group_by: ['alertname', 'cluster', 'service']
12  group_wait: 30s
13  group_interval: 5m
14  repeat_interval: 4h
15  routes:
16    -
17      receiver: 'pagerduty-critical'
18      group_by: ['alertname', 'cluster']
19      group_wait: 30s
20      group_interval: 5m
21      repeat_interval: 4h
22      matchers:
23        - severity='critical'
24    -
25      receiver: 'slack-warning'
26      group_by: ['alertname', 'service']
27      group_wait: 30s
28      group_interval: 5m
29      repeat_interval: 4h
30      matchers:
31        - severity='warning'
32
33receivers:
34  - name: 'slack-receiver'
35    slack_configs:
36      - api_url: 'https://hooks.slack.com/services/...'
37        channel: '#alerts'
38        title: '{{ .GroupLabels.alertname }}'
39        text: '{{ range .Alerts }}{{ .Annotations.description }}{{ end }}'
40  - name: 'pagerduty-receiver'
41    pagerduty_configs:
42      - service_key: 'your-pagerduty-integration-key'
43        severity: 'critical'
44        description: '{{ .GroupLabels.alertname }}'
45
46inhibit_rules:
47  - source_matchers:
48      - severity='critical'
49    target_matchers:
50      - severity='warning'
51    equal: ['alertname', 'instance']
52
53templates:
54  - '/etc/alertmanager/templates/*.tmpl'
55
56# Template: /etc/alertmanager/templates/slack.tmpl
57{{ define "slack.custom.title" }}
58[{{ .Status | toUpper }}{{ if eq .Status "firing" }}:{{ .Alerts.Firing | len }}{{ end }}] {{ .GroupLabels.SortedPairs.Values | join " | " }}
59{{ end }}
60
61{{ define "slack.custom.message" }}
62{{ range .Alerts }}
63*Alert:* {{ .Labels.alertname }}{{ if .Labels.severity }} - `{{ .Labels.severity }}`{{ end }}
64*Description:* {{ .Annotations.description }}
65*Details:*
66{{ range .Labels.SortedPairs }}  • *{{ .Name }}:* `{{ .Value }}`
67{{ end }}{{ end }}
68{{ end }}