Test if docker volume mounts are working

If you need some quick commands to paste to check if your docker volume mounting is working correctly here you go!

Commands below!

Test a file mount

echo foo > /tmp/docker-test
docker run --rm -it -v /tmp/docker-test:/tmp/docker-test alpine cat /tmp/docker-test
Code language: JavaScript (javascript)

You should see this output.

foo

Test a directory mount

mkdir /tmp/docker-test-dir
echo bar > /tmp/docker-test-dir/test
docker run --rm -it -v /tmp/docker-test-dir:/tmp/docker-test-dir alpine ls -lahr /tmp/docker-test-dir && cat /tmp/docker-test-dir/test
Code language: JavaScript (javascript)

You should see this output like this.

total 12K
-rw-r--r--    1 1000     1000           4 Jan  5 19:33 test
drwxrwxrwt    1 root     root        4.0K Jan  5 19:33 ..
drwxr-xr-x    2 1000     1000        4.0K Jan  5 16:52 .
bar
Code language: CSS (css)

Cleanup

To clean everything up you can run these commands.

rm /tmp/docker-test
rm /tmp/docker-test-dir/test
rmdir /tmp/docker-test-dir

And if you no longer want the image.

docker image rm alpine