Example of volume mounting in Docker

volume-mount.log

[ian@ianbook docker] $ cat > Dockerfile
FROM alpine:latest
CMD  cat /mounted-file.txt
[ian@ianbook docker] $ docker build -t voltest .
Sending build context to Docker daemon  2.048kB
Step 1/2 : FROM alpine:latest
 ---> caf27325b298
Step 2/2 : CMD  cat /mounted-file.txt
 ---> Running in b0d00cf05b6f
Removing intermediate container b0d00cf05b6f
 ---> daf551c6dc74
Successfully built daf551c6dc74
Successfully tagged voltest:latest
[ian@ianbook docker] $ echo "This should display from within Docker" > file-to-mount.txt
[ian@ianbook docker] $ docker run --rm -v $PWD/file-to-mount.txt:/mounted-file.txt voltest
This should display from within Docker
[ian@ianbook docker] $