Learn Docker - Fundamentals of Docker 18.x

Mounting a volume

Once we have created a named volume, we can mount it into a container. For this, we can use the -v parameter in the docker container run command:

$ docker container run --name test -it \     -v my-data:/data alpine /bin/sh

The preceding command mounts the  my-data volume to the /data folder inside the container. Inside the container, we can now create files in the /data folder and then exit:

# / cd /data 
# / echo "Some data" > data.txt 
# / echo "Some more data" > data2.txt 
# / exit 

If we navigate to the host folder that contains the volume data and list its content, we should see the two files we just created inside the container:

$ cd /mnt/sda1/var/lib/docker/volumes/my-data/_data $ ls -l total 8 -rw-r--r-- 1 root root 10 ...