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move note about VOLUME and host-dir to existing note

This commit is contained in:
Alexis Bellido 2016-12-11 11:23:44 -05:00
parent b01714f7f5
commit 8a7af7a037
1 changed files with 3 additions and 5 deletions
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engine/tutorials/dockervolumes.md
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@ -108,10 +108,6 @@ The `host-dir` can either be an absolute path or a `name` value. If you
supply an absolute path for the `host-dir`, Docker bind-mounts to the path supply an absolute path for the `host-dir`, Docker bind-mounts to the path
you specify. If you supply a `name`, Docker creates a named volume by that `name`. you specify. If you supply a `name`, Docker creates a named volume by that `name`.
> **Note:**
> The `VOLUME` instruction in a `Dockerfile` does not support
> passing a `host-dir`.
A `name` value must start with an alphanumeric character, A `name` value must start with an alphanumeric character,
followed by `a-z0-9`, `_` (underscore), `.` (period) or `-` (hyphen). followed by `a-z0-9`, `_` (underscore), `.` (period) or `-` (hyphen).
An absolute path starts with a `/` (forward slash). An absolute path starts with a `/` (forward slash).
@ -158,10 +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. option to specify that the mount should be read-only.
>**Note**: The host directory is, by its nature, host-dependent. For this >**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 >should be portable. A host directory wouldn't be available on all potential
>hosts. >hosts.
### Mount a shared-storage volume as a data volume ### Mount a shared-storage volume as a data volume
In addition to mounting a host directory in your container, some Docker In addition to mounting a host directory in your container, some Docker