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Merge pull request #10427 from jfrazelle/option-to-disable-systemd-cgroups

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Option to configure cgroup manager (adds --exec-opt)
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Jessie Frazelle
2015-04-29 10:00:41 -07:00
parent 44f8c44e5f 2afcd10202
commit 53bef64804
8 changed files with 75 additions and 5 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`.
@@ -452,6 +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.
#### Options for the native execdriver
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