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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
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]))
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)"