Dynamic volume support

[fawzibr]

I was interested sharing USB drives connected to the machine automatically without having to stop/start the container. I created an issue for it.

After working on it I think its ready.

The compose file I'm using:

services:
  samba:
    container_name: samba
    image: ghcr.io/fawzibr/samba
    restart: always
    network_mode: host
    cap_add:
      - CAP_NET_ADMIN
    environment:
      SAMBA_CONF_WORKGROUP: <workgroup>
      SAMBA_CONF_SERVER_STRING: Samba Server (Docker)
      SAMBA_CONF_SERVER_ROLE: standalone server
      SAMBA_CONF_MAP_TO_GUEST: Bad User
      SAMBA_CONF_LOG_LEVEL: 1
      SAMBA_GLOBAL_CONFIG_wins_SPACE_support: 'yes'
      SAMBA_GLOBAL_CONFIG_follow_SPACE_symlinks: 'yes'
      SAMBA_DYNAMIC_VOLUMES: "yes"
      SAMBA_DYNAMIC_INTERVAL: 1
      SAMBA_DYNAMIC_WEBHOOK_PORT: 9000
    volumes:
      - /etc/avahi/services/:/external/avahi
      - ./dynamic-shares:/dynamic-volumes # directory monitored for changes
      - /media:/media  # directory where USB drives are mounted

New environment variables:

• SAMBA_DYNAMIC_VOLUMES: Enable dynamic volumes. Default: disabled. Values: enabled/yes/true
• SAMBA_DYNAMIC_INTERVAL: Monitoring interval in minutes. Default: 1 (0 to disable monitoring)
• SAMBA_DYNAMIC_WEBHOOK_PORT: Port to manually refresh dynamic volumes. If monitoring is disabled this is the only way to refresh volumes. Address is http://server/hooks/refresh

Creating directories in ./dynamic-shares are automatically mounted. You can create a file named directory.template in ./dynamic-shares with the following:

[global]
browsable = yes
guest ok = yes
create mask = 0777
directory mask = 0777

The keys will be added when mounting the directory. If you want to add specific keys to a directory just create a section with the same name as the directory (Keys in [global] will be added first).

Creating a file with extension '.share' will add the shares in the file. For example, USB.share:

[MY_USB_DRIVE]
path=/media/MY_USB_DRIVE
browsable = yes
guest ok = yes
create mask = 0777
directory mask = 0777

[MY_USB_DRIVE_2]
path=/media/MY_USB_DRIVE_2
browsable = yes
guest ok = yes
create mask = 0777
directory mask = 0777

[MarvAmBass]

Hi, thanks for the work, I won't merge it, as it's somewhat special right - but I'd keep this pull request open in case another user has this need.