架構圖

1，官方下載編譯安裝

https://github.com/prometheus/alertmanager/releases/download/v0.23.0/alertmanager-0.23.0.linux-amd64.tar.gz

開機自啟配置

root@ceph-teamplate:/apps# cat /lib/systemd/system/alertmanager.service
[Unit]
Description=alertmanager
After=network.target

[Service]
ExecStart=/apps/alertmanager/alertmanager
WorkingDirectory
 
=/apps/alertmanager
Restart=on-failure

[Install]
WantedBy=multi-user.target

2，進入解壓後的alertmanager資料夾，修改alertmanager.yml檔案，配置報警資訊，alertmanager.yml 內容如下：

root@blackbox_exporter-189:/apps/alertmanager# cat alertmanager.yml 
global:
  resolve_timeout: 5m
  smtp_from: '[email protected]'   #用於傳送郵件的郵箱
  smtp_smarthost: 'smtp.qq.com:465'
  smtp_auth_username: '[email protected]'   #郵箱地址
  smtp_auth_password: 'xxxx'    #郵箱授權密碼
  smtp_require_tls: false
  smtp_hello: 'qq.com'
route:   #設定報警分發策略
  group_by: ['alertname']  #分組標籤
  group_wait: 8s    #告警等待時間，告警產生後等待8s,如果有相同告警一起發出
  group_interval: 3s  #兩組告警間隔時間
  repeat_interval: 2m  #重複告警的間隔時間，減少相同郵件傳送頻率，此處測試設定為2分鐘
  receiver: 'email'    #預設接收者
  #routes: #指定哪些組可以接受訊息
  #- receiver: mail
receivers:
- name: 'email'
  email_configs:
  - to: '[email protected]'  接受報警郵箱地址
    send_resolved: true
#inhibit_rules:
#  - source_match:
#      severity: 'critical'
#    target_match:
#      severity: 'warning'
#    equal: ['alertname', 'dev', 'instance']
 

檢查alertmanager.yml 配置是否正確

root@blackbox_exporter-189:/apps/alertmanager# ./amtool check-config alertmanager.yml
Checking 'alertmanager.yml'  SUCCESS
Found:
 - global config
 - route
 - 0 inhibit rules
 - 1 receivers
 - 0 templates

3，瀏覽器訪問： http://192.168.192.182:9090/rules:9093 (IP:9093)

4,進入Prometheus的安裝目錄下修改Prometheus配置，取消alertmanager有關注釋

root@pro182:/apps/prometheus# cat prometheus.yml 
# Alertmanager configuration
alerting:
  alertmanagers:
    - static_configs:
        - targets:
          - 192.168.192.189:9093

# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
  - "/apps/prometheus/*.yaml"  #配置告警規則
  # - "first_rules.yml"
  # - "second_rules.yml"

編寫告警規則檔案rule.yml

（此處用於測試，設定為當記憶體佔用高於1%時，就會告警）

root@pro182:/apps/prometheus# cat neicun.yaml 
groups:
- name: mem-rule
  rules:
  - alert: "記憶體報警"
    expr: (node_memory_MemTotal_bytes - (node_memory_MemFree_bytes+node_memory_Buffers_bytes+node_memory_Cached_bytes )) / node_memory_MemTotal_bytes * 100 > 1
    for: 5s
    labels:
      severity: warning
    annotations:
      summary: "服務名:{{$labels.alertname}} 記憶體報警"
      description: "{{ $labels.alertname }} 記憶體資源利用率大於 1%"
      value: "{{ $value }}"

瀏覽器訪問http://192.168.192.189:9093/#/alerts ，也能看到告警資訊

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