kubernetes - 将kubernetes kublet API的useNanoCore或usageCoreNanoSeconds转换为CPU利用率％Kubernetes kublet API

Question

我正在查询Kubernetes kubelet API(curl -s http://localhost:10255/stats/summary)以获得CPU /内存统计信息，并且CPU信息显示如下。

        "cpu": {
            "time": "2016-08-04T22:48:22Z",
            "usageNanoCores": 6392499,
            "usageCoreNanoSeconds": 3270519504746
        },

如何将usageNanoCores或usageCoreNanoSeconds转换为CPU利用率百分比？

Answer 1

If a process were to run on one cpu continuously for a second, its usage will be 1e+9 nanoseconds. If it ran on n cores continuously its usage will n * 1e+9 nanoseconds.

Percentage will be usage_in_nanoseconds / (capacity_in_absolute_cores * 1e+9).

*来源: https://github.com/kubernetes/heapster/issues/650#issuecomment-147795824