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intro volume plugins in userguide volumes

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NOTE should be lowercase

Signed-off-by: Ryan Wallner <ryan.wallner@clusterhq.com>

add link to list of plugins

Signed-off-by: Ryan Wallner <ryan.wallner@clusterhq.com>

address changres

Signed-off-by: Ryan Wallner <ryan.wallner@clusterhq.com>
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Ryan Wallner 2016-02-23 14:43:37 -05:00
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docs/userguide/containers/dockervolumes.md
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@ -159,6 +159,48 @@ user with access to host and its mounted directory.
>should be portable. A host directory wouldn't be available on all potential
>hosts.
### Mount a shared-storage volume as a data volume
In addition to mounting a host directory in your container, some Docker
[volume plugins](../../extend/plugins_volume.md) allow you to
provision and mount shared storage, such as iSCSI, NFS, or FC.
A benefit of using shared volumes is that they are host-independent. This
means that a volume can be made available on any host that a container is
started on as long as it has access to the shared storage backend, and has
the plugin installed.
One way to use volume drivers is through the `docker run` command.
Volume drivers create volumes by name, instead of by path like in
the other examples.
The following command creates a named volume, called `my-named-volume`,
using the `flocker` volume driver, and makes it available within the container
at `/opt/webapp`:
```bash
$ docker run -d -P \
--volume-driver=flocker \
-v my-named-volume:/opt/webapp \
--name web training/webapp python app.py
```
You may also use the `docker volume create` command, to create a volume before
using it in a container.
The following example also creates the `my-named-volume` volume, this time
using the `docker volume create` command.
```bash
$ docker volume create -d flocker --name my-named-volume -o size=20GB
$ docker run -d -P \
-v my-named-volume:/opt/webapp \
--name web training/webapp python app.py
```
A list of available plugins, including volume plugins, is available
[here](../../extend/plugins.md).
### Volume labels
Labeling systems like SELinux require that proper labels are placed on volume