2021-01-18

Note

• Prometheus でAPIサーバの監視【HTTP】 - Carpe Diem
  • https://christina04.hatenablog.com/entry/prometheus-application-over-http
  • error rate のクエリの書き方が参考になった

sum by(handler, method)(rate(http_requests_total{code=~"4.."}[1m]))
/
sum by(handler, method)(rate(http_requests_total[1m]))

• Query functions | Prometheus
  • https://prometheus.io/docs/prometheus/latest/querying/functions/
  • 覚えられないシリーズ
• Prometheus Absent function - Stack Overflow
  • https://stackoverflow.com/questions/53191746/prometheus-absent-function
  • absent はグルーピングできないので下みたいなのを使うらしい

count(up{job="prometheus"} offset 1h) by (project) unless count(up{job="prometheus"} ) by (project)