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Merge pull request #56206 from brancz/top-metrics-s
Automatic merge from submit-queue (batch tested with PRs 56206, 58525). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

kubectl: Use metrics-server for kubectl top commands

**What this PR does / why we need it**:

This PR implements support for the kubectl top commands to use the metrics-server as an aggregated API, instead of requesting the metrics from heapster directly. If the `metrics.k8s.io` API is not served by the apiserver, then this still falls back to the previous behavior.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:

Fixes #55489

**Special notes for your reviewer**:

As utilizing heapster as well as the v1alpha1 version of the metrics API is discouraged, I intentionally implemented the support very separated, so that once it is decided, that support is entirely removed, this will make it easy.

**Release note**:

```release-note
Support metrics API in `kubectl top` commands.
```

/cc @kubernetes/sig-instrumentation-pr-reviews @DirectXMan12 @fgrzadkowski @piosz
2018-01-23 13:17:31 -08:00
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api Merge pull request #58209 from NickrenREN/csi-fstype 2018-01-18 09:35:58 -08:00
build Force use of Makefile for update 2018-01-22 15:11:16 -08:00
cluster Merge pull request #58658 from roberthbailey/fluentd-gcp 2018-01-23 10:27:36 -08:00
cmd Merge pull request #58528 from deads2k/kubelet-02-mincipher 2018-01-22 20:49:35 -08:00
docs Merge pull request #58209 from NickrenREN/csi-fstype 2018-01-18 09:35:58 -08:00
examples Remove apiVersion from scheduler extender example configuration 2018-01-18 14:41:53 -08:00
Godeps Merge pull request #55918 from dougm/vcp-vcsim 2018-01-18 17:31:04 -08:00
hack Merge pull request #58539 from cblecker/update-use-make 2018-01-23 07:24:31 -08:00
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plugin Merge pull request #58595 from CaoShuFeng/LimitPodHardAntiAffinityTopology 2018-01-23 09:18:30 -08:00
staging Return ServiceUnavailable error consistently from proxy 2018-01-23 11:00:13 -05:00
test Skip unavailable services during e2e remaining content check 2018-01-23 10:26:10 -05:00
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vendor Merge pull request #55918 from dougm/vcp-vcsim 2018-01-18 17:31:04 -08:00
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