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1.3. prometheus 配置

1.3.1. rules 规则配置

prometheus.yml 配置文件

			
rule_files:
  - "rules/node.yml"	# 载入单个配置文件
  - "rules/*.rules"		# 通过通配符载入文件
			
			

prometheus 支持两种 rules

  • recording rules
  • alerting rules

1.3.1.1. recording rules

			
groups:
- name: cpu-node
  rules:
  - record: job_instance_mode:node_cpu_seconds:avg_rate5m
    expr: avg by (job, instance, mode) (rate(node_cpu_seconds_total[5m]))			
			
				

1.3.1.2. alerting rules

			
groups:
- name: example
  rules:

  # Alert for any instance that is unreachable for >5 minutes.
  - alert: InstanceDown
    expr: up == 0
    for: 5m
    labels:
      severity: page
    annotations:
      summary: "Instance {{ $labels.instance }} down"
      description: "{{ $labels.instance }} of job {{ $labels.job }} has been down for more than 5 minutes."

  # Alert for any instance that has a median request latency >1s.
  - alert: APIHighRequestLatency
    expr: api_http_request_latencies_second{quantile="0.5"} > 1
    for: 10m
    annotations:
      summary: "High request latency on {{ $labels.instance }}"
      description: "{{ $labels.instance }} has a median request latency above 1s (current value: {{ $value }}s)"