告警规则rule - 监控相关

https://xie.infoq.cn/article/c4881c62faad173e017c58e01

---

#警报规则 Rules 的定义，格式为YAML。
    groups:
    - name: <string>
      rules:
      - alert: <string>
        expr: <string>
        for:  [ <duration> | default 0 ]
        labels:
          [ <lable_name>: <label_value> ]
        annotations:
          [ <lable_name>: <tmpl_string> ]

---
	#- name: <string>	警报规则组的名称
	#- alert: <string>	警报规则的名称
	#expr: <string	使用PromQL表达式完成的警报触发条件，用于计算是否有满足触发条件
	#<lable_name>: <label_value>	自定义标签，允许自行定义标签附加在警报上，比如high warning
	#annotations: <lable_name>: <tmpl_string>	用来设置有关警报的一组描述信息，其中包括自定义的标签，以及expr计算后的值。
	
---
#例子
    groups:
    - name: operations
      rules:
      - alert: node-down
        expr: up{env="operations"} != 1
        for: 5m
        labels:
          status: High
          team: operations
        annotations:
          description: "Environment: {{ $labels.env }} Instance: {{ $labels.instance }} is Down ! ! !"
          value: '{{ $value }}'
          summary:  "The host node was down 20 minutes ago"
		  
---
#常用rule规则
	https://awesome-prometheus-alerts.grep.to/rules