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Added value format description for VOLUME instruction

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In the documentation was not mentioned explicitly that VOLUME value
shoud be a valid JSON array. Because of this I spent time to discovering
the problem with my image where I put `VOLUME ['/data']` (with single quotes).
The `['/data']` mount point was parsed and mounted whole as a string without
any errors and warnings.

Docker-DCO-1.1-Signed-off-by: Max Shytikov <mshytikov@gmail.com> (github: mshytikov)
This commit is contained in:
Max Shytikov 2014-05-09 14:42:27 +02:00
parent 79dc316a86
commit b5a37127aa
1 changed files with 3 additions and 2 deletions
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5
docs/sources/reference/builder.md
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@ -325,8 +325,9 @@ optional but default, you could use a CMD:
The `VOLUME` instruction will create a mount point with the specified name The `VOLUME` instruction will create a mount point with the specified name
and mark it as holding externally mounted volumes from native host or other and mark it as holding externally mounted volumes from native host or other
containers. For more information/examples and mounting instructions via docker containers. The value can be a JSON array, `VOLUME ["/var/log/"]`, or a plain
client, refer to [*Share Directories via Volumes*]( string, `VOLUME /var/log`. For more information/examples and mounting
instructions via the Docker client, refer to [*Share Directories via Volumes*](
/use/working_with_volumes/#volume-def) documentation. /use/working_with_volumes/#volume-def) documentation.
## USER ## USER