Manjaro-arm-installer on docker permission issues

[folaht]

I created a dockerfile so everyone could enjoy installing manjaro ARM quickly on servers,
but I’m running into permission issues:

FROM manjarolinux/base:latest
LABEL version="1.0"
LABEL maintainer="Folaht"
LABEL release-date="2021-07-19"

# Synchronize Manjaro Linux OS 
RUN pacman -Sy

# Install dependencies
RUN pacman --noconfirm -S btrfs-progs

# Install Manjaro Arm Installer
RUN pacman --noconfirm -S manjaro-arm-installer

# Run command on Docker launch
CMD ["manjaro-arm-installer"]

==> Proceeding....
  -> Getting package lists ready for rpi4 minimal edition...
==> Getting /dev/sdb ready with btrfs for rpi4...
Error: /dev/sdb: unrecognised disk label
mount: /var/tmp/manjaro-arm-installer/root: permission denied.
umount: /var/tmp/manjaro-arm-installer/root: must be superuser to unmount.
mount: /var/tmp/manjaro-arm-installer/root: permission denied.
mount: /var/tmp/manjaro-arm-installer/root/home: permission denied.
mount: /var/tmp/manjaro-arm-installer/boot: permission denied.
...

[Strit]

The installer requires to be run as root. Not as the docker user.

[folaht]

docker run -it -u root dockerfile

Still gives me the same error

[Strit]

Is the command manjaro-arm-installer being run as root or with sudo?

[folaht]

I’m pretty sure it’s run as root.
Hang on, because I’m going to try something that didn’t work before thanks to your suggestion.

[update]

docker run -it --cap-add SYS_ADMIN dockerfile

This doesn’t work either.

[folaht]

1. When I was asking the question, I was putting options after the image file like this:

docker run -it dockerfile --cap-add SYS_ADMIN

Resulting in errors.

2. Apparently privileged gives RW access to /dev/files, while --cap-add SYS_ADMIN only RO.

docker run -it --priveliged=true dockerfile

This works.