`docker stats --no-stream` always print zero values.
```
$ docker stats --no-stream
CONTAINER CPU % MEM USAGE / LIMIT MEM %
NET I/O BLOCK I/O
7f4ef234ca8c 0.00% 0 B / 0 B 0.00%
0 B / 0 B 0 B / 0 B
f05bd18819aa 0.00% 0 B / 0 B 0.00%
0 B / 0 B 0 B / 0 B
```
This commit will let docker client wait until it gets correct stat
data before print it on screen.
Signed-off-by: Zhang Wei <zhangwei555@huawei.com>
Upstream-commit: ea86c30a4acd53ef626d4c53aaf8f91134173948
Component: engine
In situations where a client is called like `docker stats` with no
arguments or flags, if a container which was already created but not
started yet is then subsequently started it will not be added to the
stats list as expected.
Also splits some of the stats helpers to a separate file from the stats
CLI which is already quite long.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: df95474885aeaaa77eeea4c4b31a92b58fc2a67c
Component: engine
