Based on LinuxServer.io, with the addition of nzbToMedia and a cronbased finished downloads cleanup script.

Transmission is designed for easy, powerful use. Transmission has the features you want from a BitTorrent client: encryption, a web interface, peer exchange, magnet links, DHT, µTP, UPnP and NAT-PMP port forwarding, webseed support, watch directories, tracker editing, global and per-torrent speed limits, and more. Transmission

$ docker create --name=transmission \
  -v <path to data>:/config \
  -v <path to downloads>:/downloads \
  -v <path to watch folder>:/watch \
  -v <path to nzbtomedia config>:/nzbtomedia
  -e PGID=<gid> -e PUID=<uid> \
  -e TZ=<timezone> \
  -p 9091:9091 -p 51413:51413 \
  -p 51413:51413/udp \
  supmagc/transmission

The parameters are split into two halves, separated by a colon, the left hand side representing the host and the right the container side. For example with a port -p external:internal - what this shows is the port mapping from internal to external of the container. So -p 8080:80 would expose port 80 from inside the container to be accessible from the host's IP on port 8080 http://192.168.x.x:8080 would show you what's running INSIDE the container on port 80.

• -p 9091
• -p 51413 - the port(s)
• -v /config - where transmission should store config files and logs
• -v /downloads - local path for downloads
• -v /watch - watch folder for torrent files
• -v /nzbtomedia - local path for the nzbToMedia config files
• -e PGID for GroupID - see below for explanation
• -e PUID for UserID - see below for explanation
• -e TZ for timezone information, eg Europe/London

It is based on alpine linux with s6 overlay, for shell access whilst the container is running do docker exec -it transmission /bin/bash.

Sometimes when using data volumes (-v flags) permissions issues can arise between the host OS and the container. We avoid this issue by allowing you to specify the user PUID and group PGID. Ensure the data volume directory on the host is owned by the same user you specify and it will "just work" ™.

In this instance PUID=1001 and PGID=1001. To find yours use id user as below:

$ id <dockeruser>
  uid=1001(dockeruser) gid=1001(dockergroup) groups=1001(dockergroup)

Webui is on port 9091, the settings.json file in /config has extra settings not available in the webui. Stop the container before editing it or any changes won't be saved.

this requires 3 settings to be changed in the settings.json file.

Make sure the container is stopped before editing these settings.

"rpc-authentication-required": true, - check this, the default is false, change to true.

"rpc-username": "transmission", substitute transmission for your chosen user name, this is just an example.

rpc-password will be a hash starting with {, replace everything including the { with your chosen password, keeping the quotes.

Transmission will convert it to a hash when you restart the container after making the above edits.

This requires "blocklist-enabled": true, to be set. By setting this to true, it is assumed you have also populated blocklist-url with a valid block list.

You'll have to edit the scripts.cfg in the /config folder for these to work.

• To monitor the logs of the container in realtime docker logs -f transmission.
• container version number docker inspect -f '{{ index .Config.Labels "build_version" }}' transmission
• image version number docker inspect -f '{{ index .Config.Labels "build_version" }}' supmagc/transmission