sabrytarek / docker-polaris

Small docker of Polaris based on Alpine Linux

Polaris docker

(c) 2018-2023 Óscar García Amor

Redistribution, modifications and pull requests are welcomed under the terms of GPLv3 license.

Polaris is a music streaming application, designed to let you enjoy your music collection from any computer or mobile device.

This docker packages Polaris under Alpine Linux, a lightweight Linux distribution.

Visit Docker Hub or Quay to see all available tags.

Run

To run this container, simply exec.

docker run -t -d \
  --name=polaris \
  -p 5050:5050 \
  ogarcia/polaris

This start polaris and publish the port to host. You can go to http://localhost:5050 to see it running.

Warning: this is a basic run, all data will be destroyed after container stop and rm.

Volumes

This container exports three volumes.

• /music: for store you music collection
• /var/cache/polaris: polaris cache
• /var/lib/polaris: polaris data like database

You can exec the following to mount your music dir, store cache and data.

docker run -t -d \
  --name=polaris \
  -p 5050:5050 \
  -v /my/music/directory:/music \
  -v /my/polaris/cache:/var/cache/polaris \
  -v /my/polaris/data:/var/lib/polaris \
  ogarcia/polaris

Take note that you must create before the cache directory /my/polaris/cache and data directory /my/polaris/data and set ownership to UID/GID 100 in both, otherwise the main proccess will crash.

mkdir -p /my/polaris/cache /my/polaris/data
chown -R 100:100 /my/polaris/cache /my/polaris/data

WARNING: Breaking changes in 0.13.x. The database is stored by default in /var/lib/polaris/db.sqlite. You must move your database from /my/polaris/data/.local/share/polaris to /my/polaris/data. The cache files are stored now in /var/cache/polaris.

Environment variables

The run-polaris command can use the following environment variables.

Variable	Used for	Default value
POLARIS_PORT	Define listen port	5050
POLARIS_CONFIG	Optional config file location
POLARIS_DB	Optional database file location
POLARIS_CACHE_DIR	Optional cache directory location	/var/cache/polaris
POLARIS_PIDFILE	Optional pid file location (see note)
POLARIS_LOGFILE	Optional log file location (see note)
POLARIS_LOGLEVEL	Optional log level between 0 (off) and 3 (debug)
POLARIS_DAEMONIZE	Run polaris as daemon in docker (see note)	false

Note: both POLARIS_PIDFILE and POLARIS_LOGFILE only apply if you set POLARIS_DAEMONIZE as true. This only have sense if you want use this image as base of your own modified one and you want run anything else.

Shell run

If you can run a shell instead run-polaris command, simply do.

docker run -t -i --rm \
  --name=polaris \
  -p 5050:5050 \
  -v /my/music/directory:/music \
  -v /my/polaris/data:/var/lib/polaris \
  --entrypoint=/bin/sh \
  ogarcia/polaris

Please note that the --rm modifier destroy the docker after shell exit.