Docker container volume doesn't write to host

Question

Hi i try to generate some assets within a docker container and put it to a host. All that is running within a docker-machine environment initialised with virtualbox driver.

for example i run:

docker run -it -v $PWD/testfolder:/var/www:rw ubuntu /bin/bash

and then

root@b9e73827bc3c:/var/www touch dummy.txt

from that point i actually have to see dummy.txt in my host's $PWD/testfolder folder, but there is neither a folder testfolder nor dummy.txt in it(logicly).

The weired thing, the same setup works correct on MacOSX and creates files on a host end, but when i tried it Ubuntu:14.04 it stopped working. here are both container inspect on

MacOSX host: https://gist.github.com/zavalit/65e8a260866f834223616c1b59e4ce7d
Ubuntu:14.04 host: https://gist.github.com/zavalit/40bd3ce8629ad81fcd6793ca63f99491

as far as i can see, they are both quite identical.

it tried it with both docker-machine version 0.7.0-rc2 and 0.6.0, docker version is 1.10.3

did anyone experienced, stuff like that? i'm pretty much appreciate any possible tipps. thx.

Community · Accepted Answer · 2017-05-23 12:00:43Z

1

you will need to manually setuo your VM to bind folders with your local machine. You can follow these instructions : Docker + Ubuntu + Virtualbox: "volumes" directive in dockerfile not working

But, why are you using a VM under ubuntu? You can use docker without any VM under Linux systems.

edited May 23, 2017 at 12:00

CommunityBot

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answered Apr 6, 2016 at 9:54

Sabmit

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1 Comment

zavalit Over a year ago

thx, but it didn't really help a lot: i runned VBoxManage sharedfolder add "VM name" --name "Users" --hostpath "/home" and then symlinked it in a VM as it was in a linked example, it got complete access to my host user, but it still doesn't mount properly.

Titouan Freville · Accepted Answer · 2016-10-14 15:17:02Z

0

You must not run docker inside docker machine if you are on linux. You can install it using apt https://docs.docker.com/engine/installation/linux/ubuntulinux/.

It does not required docker-machine and it is not a good idea to use it.

What you want to do works fine using docker on linux (without docker machine).

answered Oct 14, 2016 at 15:17

Titouan Freville

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Comments

Carlos Rafael Ramirez · Accepted Answer · 2016-10-14 18:09:11Z

0

Probably you are running the docker run after you issue a docker-machine ssh

In that case your files are inside the VM.

If running docker run in your host gives you error or doesn't run the engine in your VM, you must issue first:

. docker-machine env

Regards

answered Oct 14, 2016 at 18:09

Carlos Rafael Ramirez

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