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This patch adds --tmpfs as a option for mounting tmpfs on directories

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It will Tar up contents of child directory onto tmpfs if mounted over

This patch will use the new PreMount and PostMount hooks to "tar"
up the contents of the base image on top of tmpfs mount points.

Signed-off-by: Dan Walsh <dwalsh@redhat.com>
Upstream-commit: b3e527dfd242ad30c0297c8b257862116cf2c50e
Component: engine
This commit is contained in:
Dan Walsh
2015-12-01 13:39:34 -05:00
parent 92e9c7bc6c
commit 71b21cf347
24 changed files with 248 additions and 11 deletions
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8
components/engine/docs/reference/commandline/run.md
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@ -152,6 +152,14 @@ flag exists to allow special use-cases, like running Docker within Docker.
The `-w` lets the command being executed inside directory given, here
`/path/to/dir/`. If the path does not exists it is created inside the container.
### mount tmpfs (--tmpfs)
$ docker run -d --tmpfs /run:rw,noexec,nosuid,size=65536k my_image
The --tmpfs flag mounts a tmpfs into the container with the rw,noexec,nosuid,size=65536k options.
Underlying content from the /run in the my_image image is copied into tmpfs.
### Mount volume (-v, --read-only)
$ docker run -v `pwd`:`pwd` -w `pwd` -i -t ubuntu pwd