Kubernetes Submit Queue 76e2bed9b1 Merge pull request #55810 from abhi/cri_stats
Automatic merge from submit-queue (batch tested with PRs 54843, 55810). 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>.

Integrating cadvisor stats to CRI Pod stats collection

For kubernetes-incubator/cri-containerd#341



**What this PR does / why we need it**:
This PR contains changes to update kubelet to consume metrics from both CRI and cadvisor for Pod stats. The corresponding cadvisor changes are here https://github.com/google/cadvisor/pull/1795.
Today CRI stats provides only core metrics such as CPU Usage, Memory Usage, Disk Usage. However the stats exposed by kubelet which is a superset of core metrics and Network, User Defined Metrics are not provided by CRI stats. Hence kubelet stats are extracted from 2 sources , CRI stats and cadvisor stats. 
After the change the summary stats for a CRI based runtime (containerd) is as show here:
https://gist.github.com/abhi/d7351861df6430eb4bc5d711d274ec35

This PR also contains test case change to reflect the stats for cri stats provider. 

**Which issue(s) this PR fixes** :
Fixes # https://github.com/kubernetes-incubator/cri-containerd/issues/341

**Special notes for your reviewer**:
https://docs.google.com/presentation/d/1Os3nyMRBlFuiBLCjPgeaPv6jXylrZW5jiDXJejlA3Wg/edit#slide=id.g27cb4cb6d8_0_0

Godep will be updated to main tree after https://github.com/google/cadvisor/pull/1795 PR is merged.

**Release note**:

```release-note
Kubelet can provide full summary api support except container log stats for CRI container runtime now.
```
cc @Random-Liu
2017-11-23 01:13:18 -08:00
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2017-11-09 12:14:08 +01:00
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2017-09-09 13:38:29 +08:00
2017-10-11 17:04:47 -04:00
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2017-03-08 09:59:30 -08:00
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