How would I graph cpu usage in grafana using Prometheus and the collectd exporter?

Question

New to promql and I'm trying to graph cpu usage over time and I've found the following example getting a static percent of usage but how would I convert it to a rate for grafana?

100 * (1 - sum(collectd_cpu_total{type="idle"}) by (exported_instance) / sum(collectd_cpu_total) by (exported_instance))

I got this example from https://github.com/Naugrimm/promql-examples

Answer 1

Since you are using Prometheus already, why don't you use Prometheus' node_exporter? https://www.robustperception.io/understanding-machine-cpu-usage

100 - (avg by (instance) (irate(node_cpu_seconds_total{job="node",mode="idle"}[5m])) * 100)