docker mounting volumes on host

Question

I have successfully been able to share folders between a docker container with volumes using

docker run -v /host/path:/container/path ...

B

Answer 1

VOLUME is used in Dockerfile to expose the volume to be used by other containers. Example, create Dockerfile as:

FROM ubuntu:14.04

RUN mkdir /myvol  
RUN echo "hello world" > /myvol/greeting  
VOLUME /myvol

build the image:

$ docker build -t testing_volume .

Run the container, say container1:

$ docker run -it bash

Now run another container with volumes-from option as (say-container2)

$ docker run -it --volumes-from ubuntu:14.04 bash

You will get all data from container1 /myvol directory into container2 at same location.

-v option is given at run time of container which is used to mount container's directory on host. It is simple to use, just provide -v option with argument as :. The whole command may be as $ docker run -v :