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dockercadvisor

What's the unit of latest_usage.cpu?

I want to get a metric of the cpu usage of my docker-containers. Therefor I consume

/api/v2.0/summary/<container-name>?type=docker

The response looks like

{
  "/docker/...": {
    "timestamp": "2018-03-20T10:07:31.606821474Z",
    "latest_usage": {
       "cpu": 8,
       "memory": 1769402368
    }
  }
}

My idea was to use the latest_usage.cpu. But what is the unit of this field? Percent?

Is this field the right choice to monitor the cpu usage?

Solution

  • It's percentage.

    From cAdvisor source code:

    cpuRate := (latest.Cpu - previous.Cpu) * secondsToMilliSeconds / uint64(elapsed)
LatestUsage.cpu = cpuRate