Get Docker Container CPU Usage as Percentage

Question

Docker provides an interactive stats command, docker stats [cid] which gives up to date information on the CPU usage, like so:

CONTAINER      CPU         


        

Answer 1

So I need this also, and the following gives me the correct CPU usage, factoring in number of cores.

var cpuDelta = metric.cpu_stats.cpu_usage.total_usage -  metric.precpu_stats.cpu_usage.total_usage;
var systemDelta = metric.cpu_stats.system_cpu_usage - metric.precpu_stats.system_cpu_usage;
var RESULT_CPU_USAGE = cpuDelta / systemDelta * metric.cpu_stats.cpu_usage.percpu_usage.length * 100;

console.log(RESULT_CPU_USAGE);