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[Grafana] Design chart Gause Bar – Grafana with Metrics Sum

Posted on October 25, 2021October 26, 2021 By nim No Comments on [Grafana] Design chart Gause Bar – Grafana with Metrics Sum

Contents

Toggle
  • 1) Case Study
  • 2) Learning – Query PromQL
    • 2.1) increase( [])

1) Case Study

Trong istio mình cần vẽ chart dựa trên các metrics có type là Sum

Mục đích mình có 1 metrics sum độ thị trên grafana nó sẽ tăng dần theo thời gian.
Mình vẽ 1 chart trên grafana và show ra được trong 1h hay 2h thì metríc đã tăng bao nhiêu giá trị

sum by(type) (increase(pilot_push_triggers[$__range]))

2) Learning – Query PromQL

2.1) increase( [])

https://prometheus.io/docs/prometheus/latest/querying/functions/#increase

increase(v range-vector) calculates the increase in the time series in the range vector

Mình sẽ biết được metrics tăng bao nhiêu trong khoảng thời gian
(increase(pilot_push_triggers[1h]))

Mình sẽ sum các metrics cùng type
sum by(type) (increase(pilot_push_triggers[1h]))

chỗ time range đang bị fix cứng và mình muốn nó nhận giá trị thời gian trên menu dropdown và trả về câu query.

Mình cần thêm giá trị: $__range

Khi bạn chọn time range trên grafana trong ô last o hourse ví dụ là 5h thì câu lệnh sẽ là:
-> sum by(type) (increase(pilot_push_triggers[$__range]))
-> sum by(type) (increase(pilot_push_triggers[5h]))
-> sum by(type): cống các thằng có type giống nhau.

Bạn thấy các line nó hiển thị không được đẹp

Đẹp trai hơn rồi.


OK kết thúc bài ở đây.

Grafana, Log, Monitor & Tracing

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