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Clarify the fact that VOLUME does not support host-dir #476

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Merged
mdlinville merged 2 commits into from
Dec 19, 2016
Merged

Clarify the fact that VOLUME does not support host-dir #476

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b01714f
Clarify the fact that VOLUME does not support host-dir
alexisbellido Nov 6, 2016
8a7af7a
move note about VOLUME and host-dir to existing note
alexisbellido Dec 11, 2016
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4 changes: 3 additions & 1 deletion engine/tutorials/dockervolumes.md
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Expand Up @@ -154,10 +154,12 @@ Here you've mounted the same `/src/webapp` directory but you've added the `ro`
option to specify that the mount should be read-only.

>**Note**: The host directory is, by its nature, host-dependent. For this
>reason, you can't mount a host directory from `Dockerfile` because built images
>reason, you can't mount a host directory from `Dockerfile`, the `VOLUME`
instruction does not support passing a `host-dir`, because built images
>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
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