Files
kubernetes/pkg/kubelet/images
Kubernetes Submit Queue c7b3e163d3 Merge pull request #60448 from Random-Liu/image-cache-return-copy
Automatic merge from submit-queue (batch tested with PRs 59365, 60446, 60448, 55019, 60431). 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>.

Let image manager return a copy of image list.

Fixes https://github.com/kubernetes/kubernetes/issues/60443.
/cc @kubernetes/sig-node-pr-reviews 

**Release note**:

```release-note
none
```
2018-02-27 10:50:41 -08:00
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