How to mount Docker container volumes to different path?

Container #1 runs with a volume defined for /data, and I’d like to use the run option --volumes-from to mount this volume to another container, but I’d like to change the path for the second container.

In other words /data from container #1 should be mounted to /custom/data inside container #2.

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  • One Solution collect form web for “How to mount Docker container volumes to different path?”

    It is currently not possible to add custom options to --volumes-from.

    There are two possible solutions. However, neither is perfect…

    Solution 1

    Personally, I do not like this as it only works in Linux. It will not work with Boot2Docker. How to map volume paths using Docker's –volumes-from?

    Solution 2

    The second solution is to use a sym-link. This works pretty great but there is a caveat at the end.

    Run a docker container with an interactive shell and the volumes from container #1; busybox is ideal for this:

    docker run --rm -it --volumes-from container-1-name busybox

    where container-1-name is the name of container#1.

    Within the shell that opens, you can create a symbolic link that points from /custom/data to /data. Assuming that the root to /custom already exists (use mkdir first if not), type:

    ln -s /data /custom/data

    Now you can check this link exists. You should see something like this:

    / # ls -l custom/
    total 0
    lrwxrwxrwx    1 root     root             5 Mar  4 08:09 data -> /data

    Then you are done with this container. Exit. Now, if you create a new container than uses --volumes-from container-1-name, it can access the contents of /data via /custom/data.

    Caveat: You should note that containers using --volumes-from container-1-name will have both /data and /custom/data. There is no way around that using this solution. In most situations, I imagine this is fine. However, if this no good for you, you will need to find another solution.

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