A docker container to compile the lastest version of Netatalk in order to run a Time Machine server.
If you want to use this on an ARM-Device (like the Raspberry Pi), you have two options:
- Get the precompiled image (latest compilation on 11-07-2017):
$ docker run -h timemachine --name timemachine --restart=unless-stopped -d -v /external_volume:/timemachine -it -p 548:548 -p 636:636 odarriba/timemachine-rpi
- Build the image directly on your device:
$ docker build -t timemachine-rpi:latest -f Dockerfile.rpi . $ docker run -h timemachine --name timemachine --restart=unless-stopped -d -v /external_volume:/timemachine -it -p 548:548 -p 636:636 timemachine-rpi
docker-compose up -d
To add a user, run:
$ docker-compose exec add-account USERNAME PASSWORD VOL_NAME VOL_ROOT [VOL_SIZE_MB]
Or, if you want to add a user with a specific UID/GID, use the following format
$ docker-compose exec add-account -i 1000 -g 1000 USERNAME PASSWORD VOL_NAME VOL_ROOT [VOL_SIZE_MB]
But take care that:
VOL_NAME
will be the name of the volume shown on your OSX as the network driveVOL_ROOT
should be an absolute path, preferably a sub-path of/timemachine
(e.g.,/timemachine/backup
), so it will be stored in the according sub-path of your external volume.VOL_SIZE_MB
is an optional parameter. It indicates the max volume size for that user.
Now you have a docker instance running netatalk
.
Avahi daemon is commonly used to help your computers to find the services provided by a server.
Avahi isn't built into this Docker image because, due to Docker's networking limitations, Avahi can't spread it's messages to announce the services.
If you want to enable this feature, you can install Avahi daemon on your host following these steps (Ubuntu version):
- Install
avahi-daemon
: runsudo apt-get install avahi-daemon avahi-utils
- Copy the file from
avahi/nsswitch.conf
to/etc/nsswitch.conf
- Copy the service description file from
avahi/afpd.service
to/etc/avahi/services/afpd.service
- Restart Avahi's daemon:
sudo /etc/init.d/avahi-daemon restart
Make sure
-
your server can receive traffic on port
548
and636
(e.g.,ufw allow 548
, (636
respectively)). -
your Mac allows outgoing connections (Little Snitch?)
To start using it, follow these steps:
-
If you use Avahi, open Finder, go to Shared and connect to your server with your new username and password.
-
Alternatively (or if you don't use Avahi) from Finder press CMD-K and type
afp://your-server
whereyour-server
can be your server's name or IP address (e.g.,afp://my-server
orafp://192.168.0.5
). -
Go to System Preferences, and open Time Machine settings.
-
Open Add or Remove Backup Disk...
-
Select your new volume.
In the example below, the Docker instance is running on server central
. For USERNAME
the account Backup
along with a PASSWORD
was created. Once connected, the account Backup
is available in Time Machine settings:
You can configure the container using environment variables (for example, if you use a docker-compose
environment).
There are these environment variables:
- AFP_LOGIN: User name
- AFP_PASSWORD: User password
- AFP_NAME: Name of the volume
- AFP_SIZE_LIMIT: Size in MB of the volume (optional)
Using these variables, the container will create a user at boot time (only one per container) and the data will be stored directly in the volume /timemachine
, without subfolders.
I got Docker running, my firewall is configured, but I still don't find the service in Time Machine.
Make sure you actually mount the server volume (see Step 5) before trying to find it in Time Machine settingss.
-
The idea of using avahi-daemon installed in the bare metal server is to avoid having to execute the container with --net=host, which a potentially insecure flag. But, as the last option to check things out, it should be fine. You just should know what you are enabling.
-
A Time Machine network disk is just a disk image in an AFP volume that supports the correct level of encryption. So to be recognised by the TimeMachine daemon, you should mount the unit manually for the first time, configure TimeMachine on your computer, and then the OS will do that for you automatically.
Because if you don't do it this way, the discovery message won't be able to reach your computers.
- Óscar de Arriba ([email protected])
- Daniel Iñigo ([email protected])
- Josef Friedrich (@Josef-Friedrich)