Ability to disable "mount hostfs" in command line

[kvnull]

Version of Singularity:

What version of Singularity are you using? Run:

$ singularity version
3.5.3-1.1.fc31

Expected behavior

On a machine with multiple users, some users need mount hostfs on, some need it off.

Since a security policy may require it off, but probably won't require it on, please implement --no-hostfs as a command line option.

Actual behavior

This can only be set in /etc/singularity/singularity.conf which means disturbing the sysadmin.

What OS/distro are you running

$ cat /etc/os-release
NAME=Fedora
VERSION="31 (Thirty One)"

How did you install Singularity

From the Fedora repository.

[dtrudg]

This sounds reasonable 👍