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handle symlinks for Docker's root dir & TMPDIR 

This removes the incomplete symlink handling from engine.go and it adds
it one place in docker.go.

It also enables handling symlinks for TMPDIR.

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
This commit is contained in:
unclejack 2014-02-24 23:10:06 +02:00 committed by Tibor Vass
parent 87b94808dc
commit 7bce027176
1 changed files with 8 additions and 4 deletions
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12
docs/sources/reference/commandline/cli.rst
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@ -112,11 +112,15 @@ Using ``fd://`` will work perfectly for most setups but you can also specify ind
If the specified socket activated files aren't found then docker will exit. If the specified socket activated files aren't found then docker will exit.
You can find examples of using systemd socket activation with docker and systemd in the `docker source tree <https://github.com/dotcloud/docker/blob/master/contrib/init/systemd/socket-activation/>`_. You can find examples of using systemd socket activation with docker and systemd in the `docker source tree <https://github.com/dotcloud/docker/blob/master/contrib/init/systemd/socket-activation/>`_.
.. warning:: Docker supports softlinks for the Docker data directory (``/var/lib/docker``) and for ``/tmp``.
Docker and LXC do not support the use of softlinks for either the Docker data directory (``/var/lib/docker``) or for ``/tmp``. TMPDIR and the data directory can be set like this:
If your system is likely to be set up in that way, you can use ``readlink -f`` to canonicalise the links:
``TMPDIR=$(readlink -f /tmp) /usr/local/bin/docker -d -D -g $(readlink -f /var/lib/docker) -H unix:// $EXPOSE_ALL > /var/lib/boot2docker/docker.log 2>&1`` ::
TMPDIR=/mnt/disk2/tmp /usr/local/bin/docker -d -D -g /var/lib/docker -H unix:// > /var/lib/boot2docker/docker.log 2>&1
# or
export TMPDIR=/mnt/disk2/tmp
/usr/local/bin/docker -d -D -g /var/lib/docker -H unix:// > /var/lib/boot2docker/docker.log 2>&1
.. _cli_attach: .. _cli_attach: