opentracker-docker

Docker image from scratch, customizable, simple and small, for the opentracker project, a open and free bittorrent tracker.

How to use this image

This image compile Opentracker following build instructions, but using GCC's -static link option. The -static option links a program statically, in other words it does not require a dependency on dynamic libraries at runtime in order to run.

This image is designed to be used in a micro-service environment. There are three versions of the image you can choose from.

The open tag contains a Opentracker builded with defaults options and run in open mode.

The blacklist and whitelist tags contains a Opentracker builded with -DWANT_ACCESSLIST_BLACK and -DWANT_ACCESSLIST_WHITE respectively and run in closed mode.

Using in open Mode

The image has /bin/opentracker binary as ENTRYPOINT and -f /etc/opentracker/opentracker.conf as default CMD.

So you can run:

docker run \
  --rm \
  -d \
  --name opentracker \
  -p 6969:6969/udp -p 6969:6969 \
  wiltonsr/opentracker:open

Or with docker-compose.yml file:

version: "3"

services:
  tracker:
    image: wiltonsr/opentracker:open
    container_name: opentracker
    restart: always
    ports:
      - 6969:6969/tcp
      - 6969:6969/udp

docker-compose up

Now you can access Opentracker Stats page at http://localhost:6969/stats from your host system.

Debug Mode

All tags also contains /bin/opentracker.debug binary. So you could run Opentracker in debug mode overriding default ENTRYPOINT.

docker run \
  --rm \
  -d \
  --name opentracker \
  -p 6969:6969/udp -p 6969:6969 \
  --entrypoint="/bin/opentracker.debug" \
  wiltonsr/opentracker:open \
  -f /etc/opentracker/opentracker.conf

It is also possible to override the default command with:

docker run \
  --rm \
  --name opentracker \
  -p 6969:6969/udp -p 6969:6969 \
  wiltonsr/opentracker:open \
  -h

You will get:

Usage: /bin/opentracker [-i ip] [-p port] [-P port] [-r redirect] [-d dir] [-u user] [-A ip] [-f config] [-s livesyncport]
        -f config include and execute the config file
        -i ip     specify ip to bind to (default: *, you may specify more than one)
        -p port   specify tcp port to bind to (default: 6969, you may specify more than one)
        -P port   specify udp port to bind to (default: 6969, you may specify more than one)
        -r redirecturlspecify url where / should be redirected to (default none)
        -d dir    specify directory to try to chroot to (default: ".")
        -u user   specify user under whose privileges opentracker should run (default: "nobody")
        -A ip     bless an ip address as admin address (e.g. to allow syncs from this address)

Example:   ./opentracker -i 127.0.0.1 -p 6969 -P 6969 -f ./opentracker.conf -i 10.1.1.23 -p 2710 -p 80

Configuration file

All tags use default configuration file from here.

Some adjusts are made:

• tracker.user is setted to opentracker USER in all tags.
• access.whitelist is setted to /etc/opentracker/whitelist in whitelist tag.
• access.blacklist is setted to /etc/opentracker/blacklist in blacklist tag.

You could override the default configuration using a VOLUME:

docker run \
  --rm \
  --name opentracker \
  -v $PWD/local-opentracker.conf:/etc/opentracker/opentracker.conf \
  -p 6969:6969/udp -p 6969:6969 \
  wiltonsr/opentracker:open

Using in closed Mode

If you want to control what torrents to track – or not to track. You could use opentracker with one of the accesslist-options tags, you can control which torrents are tracked by providing a file that contains a list of human readable info_hashes. An example whitelist file would look like

0123456789abcdef0123456789abcdef01234567
890123456789abcdef0123456789abcdef012345

Compilation

Opentracker provides accesslist options, -DWANT_ACCESSLIST_BLACK and -DWANT_ACCESSLIST_WHITE, but this options are exclusive. Trying to compile it with both options will resulte in this error:

cc -c -o opentracker.o -I../libowfat -Wall -pipe -Wextra  -O3 -DWANT_ACCESSLIST_BLACK -DWANT_ACCESSLIST_WHITE -DWANT_FULLSCRAPE opentracker.c
In file included from opentracker.c:36:
ot_accesslist.h:10:4: error: #error WANT_ACCESSLIST_BLACK and WANT_ACCESSLIST_WHITE are exclusive.
   10 | #  error WANT_ACCESSLIST_BLACK and WANT_ACCESSLIST_WHITE are exclusive.
      |    ^~~~~
make: *** [Makefile:81: opentracker.o] Erro 1

Because of that there are two another tags, blacklist and whitelist, which were compiled with the respective options.

Whitelist Mode

docker run \
  --rm \
  --name opentracker \
  -v $PWD/local-whitelist:/etc/opentracker/whitelist \
  -p 6969:6969/udp -p 6969:6969 \
  wiltonsr/opentracker:whitelist

Blacklist Mode

docker run \
  --rm \
  --name opentracker \
  -v $PWD/local-blacklist:/etc/opentracker/blacklist \
  -p 6969:6969/udp -p 6969:6969 \
  wiltonsr/opentracker:blacklist

Reloading file changes

To make opentracker reload it's white/blacklist after changes, send a SIGHUP unix signal.

docker kill --signal="SIGHUP" opentracker