samba - (ghcr.io/servercontainers/samba) [x86 + arm]

samba on alpine

with timemachine, zeroconf (avahi) and WSD (Web Services for Devices) (wsdd2) support.

IMPORTANT!

New Registry: ghcr.io/servercontainers/samba

In March 2023 - Docker informed me that they are going to remove my organizations servercontainers and desktopcontainers unless I'm upgrading to a pro plan.

I'm not going to do that. It's more of a professionally done hobby then a professional job I'm earning money with.

In order to avoid bad actors taking over my org. names and publishing potenial backdoored containers, I'd recommend to switch over to my new github registry: ghcr.io/servercontainers.

Build & Variants

You can specify DOCKER_REGISTRY environment variable (for example my.registry.tld) and use the build script to build the main container and it's variants for x86_64, arm64 and arm

You'll find all images tagged like a3.15.0-s4.15.2 which means a<alpine version>-s<samba version>. This way you can pin your installation/configuration to a certian version. or easily roll back if you experience any problems.

To build a latest tag run ./build.sh release

For builds without specified registry you can use the generate-variants.sh script to generate variations of this container and build the repos yourself.

all of those variants are automatically build and generated in one go

• latest or a<alpine version>-s<samba version>
  • main version of this repo
  • includes everything (smbd, avahi, wsdd2)
  • not all services need to start/run -> use ENV variables to disable optional services
• smbd-only-latest or smbd-only-a<alpine version>-s<samba version>
  • this will only include smbd and my scripts - no avahi, wsdd2 installed
• smbd-avahi-latest or smbd-avahi-a<alpine version>-s<samba version>
  • this will only include smbd, my scripts and avahi
  • optional service can still be disabled using ENV variables
• smbd-wsdd2-latest or smbd-wsdd2-a<alpine version>-s<samba version>
  • this will only include smbd, my scripts and wsdd2
  • optional service can still be disabled using ENV variables

Changelogs

• 2023-04-20
  • added testparm -s to check config before starting - closes issue #81
  • removed socket options, let the systems negotiate
• 2023-04-11
  • fixed pid bug on container restarts
• 2023-03-20
  • github action to build container
  • implemented ghcr.io as new registry
• 2023-03-15
  • switched from docker hub to a build-yourself container
• 2023-02-06
  • fixed capitalization of username while hashing - convert to lowercase
• 2022-12-05
  • fixed SAMBA_GLOBAL_CONFIG_... with colon in the key.
• 2022-05-31
  • support for server role as ENV parameter
• 2022-01-31
  • support for global settings via stanza (similar to volume config)
• 2022-01-28
  • removed old chmod 777, chown nodboy:nogroup statements on multi user shares
• 2022-01-20
  • fixed healthcheck for container avahi
• 2022-01-08
  • better build script

older changelogs -> CHANGELOGS.md

Info

This is a Samba Server Container running on _/alpine.

Troubleshooting

If you experience Problems, take a look at this file: TROUBLESHOOTING.md

Environment variables and defaults

Samba

• SAMBA_GLOBAL_STANZA

  • optional
  • default not set
  • use it to manage multiple global settings in one place
  • seperate multiple settings/lines using ; which will be automatically translated to \n

• SAMBA_GLOBAL_CONFIG_someuniquevalue

  • add any global samba config to smb.conf
  • example value: key = value
  • important if the SAMBA key contains a space replace it with _SPACE_
    • e.g. foo_SPACE_bar
  • important if the SAMBA key contains a : space replace it with _COLON_
    • e.g. foo_COLON_bar

• ACCOUNT_username

  • multiple variables/accounts possible
  • adds a new user account with the given username and the env value as password or samba hash
    • either you add a simple plaintext password as value (can't start with :username:[0-9]*: or it will be detected as hash)
    • to add a samba hash e.g. user:1002:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:8846F7EAEE8FB117AD06BDD830B7586C:[U ]:LCT-5FE1F7DF: (user: user / password: password) add the line from /var/lib/samba/private/smbpasswd
    • create hash using this command docker run -ti --rm --entrypoint create-hash.sh servercontainers/samba
    • see docker-compose.yml user foo for an example how it's used/configured.
    • the hashing script needs an all lowercase username - it will therefore automatically lowercase given username
  • to restrict access of volumes you can add the following to your samba volume config:
    • valid users = alice; invalid users = bob;

• UID_username

  • optional
  • specify the uid explicitly for each user account.
  • the username part must match to a specified ACCOUNT_username environment variable

• GROUP_groupname

  • optional
  • value will be gid
  • example: GROUP_devops=1500 will create group devops with id 1500

• GROUPS_username

  • optional
  • additional groups for the user
  • to create groups look at GROUP_groupname or mount/inject /etc/groups file (can cause problems)
  • the username part must match to a specified ACCOUNT_username environment variable
  • one or more groups to add seperated by a ,
  • example: GROUPS_johndoe=musican,devops

• MODEL

  • optional model value of avahi samba service
  • default: TimeCapsule
  • some available options are Xserve, PowerBook, PowerMac, Macmini, iMac, MacBook, MacBookPro, MacBookAir, MacPro, MacPro6,1, MacPro7,1 (Tower), MacPro7,1@ECOLOR=226,226,224 (Rack), TimeCapsule, AppleTV1,1 and AirPort.

• AVAHI_NAME

  • optional name of avahi samba service
  • default: hostname

• AVAHI_DISABLE

  • optional
  • default not set - set to any value to disable avahi Service

• SAMBA_CONF_SERVER_ROLE

  • default: standalone server
  • note: $ is an invalid symbol in this env

• SAMBA_CONF_LOG_LEVEL

  • default: 1

• SAMBA_CONF_WORKGROUP

  • default: WORKGROUP

• SAMBA_CONF_SERVER_STRING

  • default: Samba Server

• SAMBA_CONF_MAP_TO_GUEST

  • default: Bad User

• SAMBA_VOLUME_CONFIG_myconfigname

  • adds a new samba volume configuration
  • multiple variables/confgurations possible by adding unique configname to SAMBA_VOLUME_CONFIG_
  • take a look at https://wiki.samba.org/index.php/Configure_Samba_to_Work_Better_with_Mac_OS_X -> EXPLANATION OF VOLUME PARAMETERS
  • seperate multiple lines using ; which will be automatically translated to \n
  • if your path variable ends with %U e.g. path = /shares/homes/%U; multi user mode gets activated and each user gets their own subdirectory for their own share. (great for timemachine - every user get's his own personal share)
  • for timemachine only add fruit:time machine = yes and all other needed settings are automatically added
    • you can also use fruit:time machine max size = 500G; to limit max size of time machine volume

• WSDD2_DISABLE

  • optional
  • default not set - set to any value to disable wsdd2 Service

• WSDD2_PARAMETERS

  • optional specify parameters for wsdd2
  • default not set - wsdd2 starts without any parameters
  • e.g. -l

Volumes

• your shares

  • by default I recommend mounting all shares beneath /shares and configure them using the path property

• /external/avahi

  • mount your avahi service folder e.g. /etc/avahi/services/ to this spot
  • the container now maintains the service file samba.service for you - it will be overwritten!
  • when mounted, the internal avahi daemon will be disabled

Some helpful indepth informations about TimeMachine and Avahi / Zeroconf

General Infos

• Samba

  • https://github.com/willtho89/docker-samba-timemachine/
  • https://github.com/sp00ls/SambaConfigs very interessting multi user timemachine setup
  • https://wiki.samba.org/index.php/Configure_Samba_to_Work_Better_with_Mac_OS_X
  • https://serverfault.com/questions/1010822/samba4-issues-with-time-machine-cannot-create-new-backup-on-samba-share

• Avahi

  • https://openwrt.org/docs/guide-user/services/nas/samba_configuration#zeroconf_advertising
  • http://samba.sourceforge.net/wiki/index.php/Bonjour_record_adisk_adVF_values
  • https://linux.die.net/man/5/avahi.service

You can't proxy the zeroconf inside the container to the outside, since this would need routing and forwarding to your internal docker0 interface from outside. So you need to use the network=host mode to enable zeroconf from within the container

You can just expose the needed Port 548 to the docker hosts port and install avahi. After that just add a new service which fits to your config.

My personal TimeMachine recommendation

If you have a more sophisticated network setup (vpn, different networks etc.) you might want to avoid using zeroconfig + avahi in combination with TimeMachine.

Zeroconf limits you to the autodiscovered mdns names ($AVAHI_NAME + .local). So whenever your mac can't pic up this zeroconf configuration TimeMachine will not backup your machine. This is not bad in a normal guy's personal homenetwork. Here it would backup everytime the user is at home and has all devices (and his backup nas) in one LAN.

To overcome this issue, I'd suggest to connect your NAS/Samba Server manually using Finder -> Go -> Connect to Server (or shortcut ⌘k). Enter the FQDN or IP of the server and the path to your timemachine share you want to connect to and establish the connection.

Once the connection is established, you can open Settings -> TimeMachine and add/choose this newly connected share as your place to store your backups. You'll notice that it now shows the FQDN or IP you choose. If you already used this NAS but with zeroconf it should detect that there are already backups for your mac and asks/continues using them - so a full backup shouldn't be required if you switch your connection method.

After you made this more explicit network configuration it will backup as soon as your device is reachable - so if a connection via VPN or cause of network cascading is possible. this way you can backup from any network as long as routing works :)

Windows 10 Network Discovery

For the Windows 10 Network Discovery the hostname of the container is used. If you use network_mode: host then it's the docker-host hostname.

If you use any other network_mode and want to avoid the autogenerated cryptic hostname of the container, you can specify a explicit hostname using: hostname: my-samba-containers-hostname

• WSD
  • https://devanswers.co/discover-ubuntu-machines-samba-shares-windows-10-network/
  • https://github.com/Netgear/wsdd2

Note: This wsdd2 service seems to need CAP_NET_ADMIN as a capability. (more info: ServerContainers#50)

    cap_add:
      - CAP_NET_ADMIN