要配置Prometheus告警规则,需要创建一个名为prometheus.rules
的YAML文件,然后在该文件中定义告警规则。以下是一个示例配置文件:
groups:
- name: example_rules
rules:
- alert: HighRequestRate
expr: sum(rate(http_requests_total[5m])) > 100
for: 1m
labels:
severity: critical
annotations:
summary: High request rate detected
description: The HTTP request rate is above the threshold
- alert: HighCPUUsage
expr: node_cpu_seconds_total / node:capacity:cpu > 0.8
for: 5m
labels:
severity: warning
annotations:
summary: High CPU usage detected
description: The CPU usage is above 80%
在这个配置文件中,我们定义了两个告警规则:HighRequestRate
和HighCPUUsage
。每个规则包含了表达式expr
、持续时间for
、标签labels
和注释annotations
等属性。
配置完成后,将该文件保存到Prometheus的/etc/prometheus/
目录下,并在Prometheus的配置文件prometheus.yml
中添加以下内容来加载这些告警规则:
rule_files:
- /etc/prometheus/prometheus.rules
最后,重新加载Prometheus配置或重启Prometheus服务以使告警规则生效。告警规则配置完成后,Prometheus将监控指标并根据规则定义发送警报通知。