Example Dockerfile of application with autofs (automount)

Use case

We have applications which move files from SMB servers. This configuration allow using autofs (automount) as background process in container.

Base image

This example use centos:7 base image, but principle this works on all base images.

The most important part is install autofs and cifs-utils packages and configure it:

echo -e "+auto.master\n/net\t/etc/auto.cifs\t--timeout 60" > /etc/auto.master; \
echo -e "*\t-fstype=autofs,-Dhost=&\tfile:/etc/auto.cifs.sub" > /etc/auto.cifs; \
echo -e "*\t-fstype=cifs,user=${user},pass=${pass},domain=${domain},uid=${uid},gid=${gid}\t://\${host}/&" > /etc/auto.cifs.sub

For background run of automount is used own entrypoint.sh

docker run

docker run --rm -it --cap-add ALL autofs_docker_example bash To mount a FUSE based filesystem, you need set right --cap-add (https://docs.docker.com/engine/reference/run/#/runtime-privilege-and-linux-capabilities)