This commit fixes panic when execute stats command:
* use --format {{.Name}} with --all when there're exited containers.
* use --format {{.Name}} while stating exited container.
The root cause is when stating an exited container, the result from the
api didn't contain the Name and ID field, which will make format
process panic.
Panic log is like this:
```
panic: runtime error: slice bounds out of range [recovered]
panic: runtime error: slice bounds out of range
goroutine 1 [running]:
panic(0xb20f80, 0xc420014110)
/usr/local/go/src/runtime/panic.go:500 +0x1a1
text/template.errRecover(0xc4201773e8)
/usr/local/go/src/text/template/exec.go:140 +0x2ad
panic(0xb20f80, 0xc420014110)
/usr/local/go/src/runtime/panic.go:458 +0x243
github.com/docker/docker/cli/command/formatter.(*containerStatsContext).Name(0xc420430160,
0x0, 0x0)
/go/src/github.com/docker/docker/cli/command/formatter/stats.go:148
+0x86
reflect.Value.call(0xb9a3a0, 0xc420430160, 0x2213, 0xbe3657, 0x4,
0x11bc9f8, 0x0, 0x0, 0x4d75b3, 0x1198940, ...)
/usr/local/go/src/reflect/value.go:434 +0x5c8
reflect.Value.Call(0xb9a3a0, 0xc420430160, 0x2213, 0x11bc9f8, 0x0, 0x0,
0xc420424028, 0xb, 0xb)
/usr/local/go/src/reflect/value.go:302 +0xa4
text/template.(*state).evalCall(0xc420177368, 0xb9a3a0, 0xc420430160,
0x16, 0xb9a3a0, 0xc420430160, 0x2213, 0x1178fa0, 0xc4203ea330,
0xc4203de283, ...)
/usr/local/go/src/text/template/exec.go:658 +0x530
```
Signed-off-by: Zhang Wei <zhangwei555@huawei.com>
This fix is an attempt to fix issue raised in #28005 where
`docker stats` on Windows shows Linux headers if there is
no containers in stats.
The reason for the issue is that, in case there is no container,
a header is faked in:
https://github.com/docker/docker/blob/v1.13.0/cli/command/formatter/formatter.go#L74-L78
which does not know OS type information (as OS was stored with container stat entries)
This fix tries to fix the issue by moving OS type information
to stats context (instead of individual container stats entry).
Additional unit tests have been added.
This fix fixes#28005.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
How to test (it should not print `{}`, and just returns JSON with the actual data):
$ docker images --format '{{json .}}'
$ docker container stats --format '{{json .}}'
Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
This adds support to display names or id of container instead of what
was provided in the request.
This keeps the default behavior (`docker stats byname` will display
`byname` in the `CONTAINER` colmun and `docker stats byid` will display
the id in the `CONTAINER` column) but adds two new format directive.
Signed-off-by: Vincent Demeester <vincent@sbr.pm>
The formatter.ContainerStats struct exposes its Mutex.
This is a bad design and should be fixed.
To fix that, I separated the statistics
attributes from ContainerStats to StatsEntry and
hid the mutex. Notice that the mutex protects both
the `err` field and the statistics attributes.
Then, implemented SetStatistics, SetError, GetStatistics
and GetError to avoid races.
Moreover, to make this less granular, I decided to
replace the read-write mutex with the regular mutex and
to pass a StatsEntry slice to formatter.ContainerStatsWrite
Signed-off-by: Boaz Shuster <ripcurld.github@gmail.com>
