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Add a note to point out to new users that B2D bind-mounts are special-ish

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Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@docker.com> (github: SvenDowideit)

Signed-off-by: Sven Dowideit <SvenDowideit@docker.com>
This commit is contained in:
Sven Dowideit 2014-12-04 11:12:16 +10:00
parent 12fef2d8df
commit e52988528d
1 changed files with 11 additions and 3 deletions
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14
docs/sources/userguide/dockervolumes.md
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@ -47,7 +47,15 @@ This will create a new volume inside a container at `/webapp`.
### Mount a Host Directory as a Data Volume
In addition to creating a volume using the `-v` flag you can also mount a
directory from your own host into a container.
directory from your Docker daemon's host into a container.
> **Note:**
> If you are using Boot2Docker, your Docker daemon only has limited access to
> your OSX/Windows filesystem. Boot2Docker tries to auto-share your `/Users`
> (OSX) or `C:\Users` (Windows) directory - and so you can mount files or directories
> using `docker run -v /Users/<path>:/<container path> ...` (OSX) or
> `docker run -v /c/Users/<path>:/<container path ...` (Windows). All other paths
> come from the Boot2Docker virtual machine's filesystem.
$ sudo docker run -d -P --name web -v /src/webapp:/opt/webapp training/webapp python app.py
@ -67,8 +75,8 @@ create it for you.
> **Note:**
> This is not available from a `Dockerfile` due to the portability
> and sharing purpose of it. As the host directory is, by its nature,
> host-dependent, a host directory specified in a `Dockerfile` probably
> and sharing purpose of built images. The host directory is, by its nature,
> host-dependent, so a host directory specified in a `Dockerfile` probably
> wouldn't work on all hosts.
Docker defaults to a read-write volume but we can also mount a directory