Verified Commit e91c7469 authored by Ben Kochie's avatar Ben Kochie
Browse files

Update example Prometheus queries 

* Update metric names to match current release.
* Improve descriptions.
* Improve examples to show more query language functionality.

Memory:
* Show use of `or` function.
* Automatically select "MemAvailable" kernel metric if possible.

CPU:
* Show use of `avg without ...`.
* Show CPU utilization per node.

Network:
* Show use of `!=` label matching.
* Don't show "localhost" metrics.
parent a3c3776b

doc/administration/monitoring/prometheus/index.md

+4 −4
Original line number Diff line number Diff line
@@ -97,10 +97,10 @@ For a more fully featured dashboard, Grafana can be used and has 


Sample Prometheus queries:



- **% Memory used:** `(1 - ((node_memory_MemFree + node_memory_Cached) / node_memory_MemTotal)) * 100`

- **% CPU load:** `1 - rate(node_cpu{mode="idle"}[5m])`

- **Data transmitted:** `irate(node_network_transmit_bytes[5m])`

- **Data received:** `irate(node_network_receive_bytes[5m])`

- **% Memory available:** `((node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes) or ((node_memory_MemFree_bytes + node_memory_Buffers_bytes + node_memory_Cached_bytes) / node_memory_MemTotal_bytes)) * 100`

- **% CPU utilization:** `1 - avg without (mode,cpu) (rate(node_cpu_seconds_total{mode="idle"}[5m]))`

- **Data transmitted:** `rate(node_network_transmit_bytes_total{device!="lo"}[5m])`

- **Data received:** `rate(node_network_receive_bytes_total{device!="lo"}[5m])`



## Configuring Prometheus to monitor Kubernetes