Unable to mount CDROM from custom add-on

Development
1

I am trying to take a page from filebrowser add-on which exposes local drives to a web browser.

However despite

  • setting apparmor policy
  • expose SYS_ADMIN capabilities to docker
  • include devices in map

I still get a permission denied attempting to mount it.

config.yaml

name: "CD Reader"
description: "Allows mounting of CD drive to read mp3s for plex, etc"
version: "1.0.0"
slug: "cd_reader"
init: false
arch:
  - amd64
options:
  mp3_path: /media/music
schema:
  mp3_path: str
privileged: 
  - SYS_ADMIN
  - DAC_READ_SEARCH
map:
  - media:rw
  - share:rw
boot: manual
devices:
  - /dev/sr0
  - /dev/cdrom
apparmor: true

Dockerfile

ARG BUILD_FROM
FROM $BUILD_FROM



# Set S6 wait time
ENV S6_CMD_WAIT_FOR_SERVICES=1 \
    S6_CMD_WAIT_FOR_SERVICES_MAXTIME=0 \
    S6_SERVICES_GRACETIME=0

# Copy data for add-on
COPY run.sh /
RUN chmod a+x /run.sh

# Corrects permissions for s6 v3
RUN if [ -d /etc/cont-init.d ]; then chmod -R 755 /etc/cont-init.d; fi && \
    if [ -d /etc/services.d ]; then chmod -R 755 /etc/services.d; fi && \
    if [ -f /run.sh ]; then chmod 755 /entrypoint.sh; fi



CMD [ "/run.sh" ]

run.sh

#!/bin/bash

PUID="0"
GUID="0"

echo hello

blkid || echo "blkid not found"

mkdir /mnt/sr0
chown "$PUID:$PGID" /mnt/sr0
mkdir /mnt/cdrom
chown "$PUID:$PGID" /mnt/cdrom
mount /dev/sr0 -o "uid=$PUID,gid=$PGID"  /mnt/sr0 || echo "could not mount sr0"
mount /dev/cdrom -o "uid=$PUID,gid=$PGID" /mnt/cdrom || echo "could not mount cdrom"


ls /dev/disk/by-label

df -h

Error (*logs)

...
hello
mount: mounting /dev/sr0 on /mnt/sr0 failed: Permission denied
could not mount sr0
mount: mounting /dev/cdrom on /mnt/cdrom failed: Permission denied
could not mount cdrom
hassos-boot
hassos-data
hassos-overlay
...
2

Hi,
Any news on this ? I’m trying to expose /dev/sr0 or /dev/cdrom to a vlc player docker to play my old CD and I have this denied issue.
Note : if there is any other simple way to achieve this, please tell me too !

3 

environment:
  PGID: '0'
  PUID: '0'

in config i think was fix, sorry tis been a while

4

Could you please make a detailed tutorial of this? I run my Home Assistant on an old lenovo laptop with a dvdrom drive and i’m very interested to cast cds on my smart speakers.

5

I’m not sure I’ll get to that, but here is the full source of my app that reads audio cds and dvds. home-assistant-addons/cd_reader at main · eddiewebb/home-assistant-addons · GitHub

1 Like