We let dockershim implement the kubelet's internal (CRI) API as an
intermediary step before transitioning fully to communicate using gRPC.
Now that kubelet has been communicating to the runtime over gRPC for
multiple releases, we can safely retire the extra interface in
dockershim.
Implement CRI stats for dockershim using docker stats. This enables use
of the summary api to get container metrics on Windows where CRI stats
are enabled.
Automatic merge from submit-queue
use make slice to store objects to improve efficiency
Signed-off-by: allencloud <allen.sun@daocloud.io>
**What this PR does / why we need it**:
we we know the slice length in advance, I think we had better use make to create the specified length of slice. This will improve some kind of performance. Since if we create a slice with []type{}, we did not know how much space runtime should reserve, since slice implementation should be continuous in memory. While when we make a slice with specified length, runtime would reserve a continuous memory space which will not result in slice movement in case of current space is not enough.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
NONE
**Special notes for your reviewer**:
NONE
**Release note**:
```release-note
NONE
```
Previously we exported many constants and functions in dockertools to
share with the dockershim package. This change moves such
constants/functions to dockershim and unexport them.
This change involves only mechnical changes and should not have any
functional impact.
Add a new docker integration with kubelet using the new runtime API.
This change adds the package with some skeletons, and implements some
of the basic operations.
Yu-Ju Hong