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option to configure cgroups

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Signed-off-by: Jessica Frazelle <jess@docker.com>
This commit is contained in:
Jessica Frazelle
2017-06-02 00:06:55 +00:00
committed by Tibor Vass
parent 734430c44c
commit 109f9996a9
1 changed files with 13 additions and 19 deletions
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docs/sources/reference/commandline/cli.md
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@@ -442,7 +442,7 @@ Currently supported options are:
> Otherwise, set this flag for migrating existing Docker daemons to a
> daemon with a supported environment.
### Docker exec-driver option
### Docker execdriver option
The Docker daemon uses a specifically built `libcontainer` execution driver as its
interface to the Linux kernel `namespaces`, `cgroups`, and `SELinux`.
@@ -452,27 +452,21 @@ https://linuxcontainers.org/) via the `lxc` execution driver, however, this is
not where the primary development of new functionality is taking place.
Add `-e lxc` to the daemon flags to use the `lxc` execution driver.
#### Exec driver options
#### Options for the native execdriver
Particular exec-driver can be configured with options specified with
`--exec-opt` flags. The only driver accepting options is `native`
(libcontainer) as of now. All its options are prefixed with `native`.
Currently supported options are:
* `native.cgroupdriver`
Specifies the management of the container's cgroups. As of now the only
viable options are `cgroupfs` and `systemd`. The option will always
fallback to `cgroupfs`. By default, if no option is specified, the
execdriver will try `systemd` and fallback to `cgroupfs`. Same applies if
`systemd` is passed as the `cgroupdriver` but is not capable of being used.
Example use:
$ sudo docker -d --exec-opt native.cgroupdriver=cgroupfs
You can configure the `native` (libcontainer) execdriver using options specified
with the `--exec-opt` flag. All the flag's options have the `native` prefix. A
single `native.cgroupdriver` option is available.
The `native.cgroupdriver` option specifies the management of the container's
cgroups. You can specify `cgroupfs` or `systemd`. If you specify `systemd` and
it is not available, the system uses `cgroupfs`. By default, if no option is
specified, the execdriver first tries `systemd` and falls back to `cgroupfs`.
This example sets the execdriver to `cgroupfs`:
$ sudo docker -d --exec-opt native.cgroupdriver=cgroupfs
Setting this option applies to all containers the daemon launches.
### Daemon DNS options