kubelet does not report usageNanoCores for node on Windows

[yujuhong]

What happened:

usageNanoCores is not reported for node on Windows.

{ 
  "node": {
   "nodeName": "e2e-test-yjhong-windows-node-group-wv9b",
   "systemContainers": [
    {
     "name": "pods",
     "startTime": "2019-04-17T22:58:59Z",
     "cpu": {
      "time": null
     },
     "memory": {
      "time": null
     },
     "userDefinedMetrics": null
    }
   ],
   "startTime": "2019-04-17T22:24:57Z",
   "cpu": {
    "time": "2019-04-17T22:58:58Z",
    "usageCoreNanoSeconds": 55040000000
   },
   "memory": {
    "time": "2019-04-17T22:58:58Z",
    "availableBytes": 7619317760,
    "usageBytes": 1213886464,
    "workingSetBytes": 433328128,
    "rssBytes": 0,
    "pageFaults": 0,
    "majorPageFaults": 0
   },
...

Environment:

• Kubernetes version (use kubectl version): Kubernetes v1.15.0-alpha.1.76+d48509bdf01ee1-
• Cloud provider or hardware configuration: GCE
• OS (e.g: cat /etc/os-release): Windows 1809
• Kernel (e.g. uname -a):
• Install tools:
• Others:

/cc @dashpole @feiskyer

[zhiweiv]

I reported same issue a few days ago, no feedback yet, it makes metrics server 0.3.x not working with Windows nodes.
#75934

[feiskyer]

yep, only usageCoreNanoSeconds is reported for node CPU now. We should probably add a cache for usageCoreNanoSeconds and calculate usageNanoCores based on it.

[andyzhangx]

someone able to work on this? This is a blocking issue for upgrade to metrics server to v0.3.x if there is windows node

[yujuhong]

/cc @liyanhui1228