Prometheus的Recording rules實踐

​​Recording rules官方文檔​​

如圖：

 recording_rules.yml内容如下：

groups:
  - name: my_first_recording_rule
    rules:
    - record: node_cpu_total_used_rate
      expr: (1 - sum(increase(node_cpu_seconds_total{mode="idle"}[1m])) by (instance_id) / sum(increase(node_cpu_seconds_total[1m])) by (instance_id) ) * 100      

prometheus.yml配置recording rules檔案路徑：

可以檢視，已經預計算出名額，如圖：