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Add info about warnings in docker info (#5048)

This commit is contained in:
Misty Stanley-Jones 2017-10-20 09:48:10 -07:00 committed by GitHub
parent 02e0a52010
commit ea6f50b761
3 changed files with 50 additions and 1 deletions
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20
edge/engine/reference/commandline/info.md
View File

@ -8,9 +8,27 @@ Sorry, but the contents of this page are automatically generated from
Docker's source code. If you want to suggest a change to the text that appears
here, you'll need to find the string by searching this repo:
https://github.com/docker/cli
https://www.github.com/docker/cli
-->
{% if page.datafolder contains '-edge' %}
{% include edge_only.md section="cliref" %}
{% endif %}
{% include cli.md datafolder=page.datafolder datafile=page.datafile %}
## Warnings about kernel support
If your operating system does not enable certain capabilities, you may see
warnings such as one of the following, when you run `docker info`:
```none
WARNING: Your kernel does not support swap limit capabilities. Limitation discarded.
```
```none
WARNING: No swap limit support
```
You can ignore these warnings unless you actually need the ability to
[limit these resources](/engine/admin/resource_constraints.md), in which case you
should consult your operating system's documentation for enabling them.
[Learn more](/engine/installation/linux/linux-postinstall.md#your-kernel-does-not-support-cgroup-swap-limit-capabilities).

13
engine/admin/resource_constraints.md
View File

@ -12,6 +12,19 @@ to control how much memory, CPU, or block IO a container can use, setting runtim
configuration flags of the `docker run` command. This section provides details
on when you should set such limits and the possible implications of setting them.
Many of these features require your kernel to support Linux capabilities. To
check for support, you can use the
[`docker info`](/engine/reference/commandline/info.md) command. If a capability
is disabled in your kernel, you may see a warning at the end of the output like
the following:
```none
WARNING: No swap limit support
```
Consult your operating system's documentation for enabling them.
[Learn more](/engine/installation/linux/linux-postinstall.md#your-kernel-does-not-support-cgroup-swap-limit-capabilities).
## Memory
### Understand the risks of running out of memory

18
engine/reference/commandline/info.md
View File

@ -14,3 +14,21 @@ https://www.github.com/docker/cli
{% include edge_only.md section="cliref" %}
{% endif %}
{% include cli.md datafolder=page.datafolder datafile=page.datafile %}
## Warnings about kernel support
If your operating system does not enable certain capabilities, you may see
warnings such as one of the following, when you run `docker info`:
```none
WARNING: Your kernel does not support swap limit capabilities. Limitation discarded.
```
```none
WARNING: No swap limit support
```
You can ignore these warnings unless you actually need the ability to
[limit these resources](/engine/admin/resource_constraints.md), in which case you
should consult your operating system's documentation for enabling them.
[Learn more](/engine/installation/linux/linux-postinstall.md#your-kernel-does-not-support-cgroup-swap-limit-capabilities).