Radarr is an independent fork of Sonarr which is used to download movies via bittorent and UseNet. The fuss is because it the only platform where the user can schedule what movie he/she wants to download at which date and time and Radarr will automatically download it for you, you just have to add it to your schedule. Version log 1.5.0 Resolve issue: unable to select season in show view, if you have any issues please update to at least 2.0.0.3732 1.4.2 Resolved issue where options are not visible on smaller resolution screens 1.4.1 Added option to hide the badge if there are no wanted items available 1.4.0 Season 0 is called Specials now Options page will open automatically when extension is not configured.
Volumes and Paths
There are two common problems with Docker volumes: Paths that differ between the Radarr and download client container and paths that prevent fast moves and hard links.
The first is a problem because the download client will report a download's path as /torrents/My.Movie.2018/, but in the Radarr container that might be at /downloads/My.Movie.2018/. The second is a performance issue and causes problems for seeding torrents. Both problems can be solved with well planned, consistent paths.
Sonarr Utorrent Plex
Most Docker images suggest paths like /movies and /downloads. This causes slow moves and doesn't allow hard links because they are considered two different file systems inside the container. Some also recommend paths for the download client container that are different from the Radarr container, like /torrents.
The best solution is to use a single, common volume inside the containers, such as /data. Your Movies would be in /data/Movies, torrents in /data/downloads/torrents and/or usenet downloads in /data/downloads/usenet.
If this advice is not followed, you may have to configure a Remote Path Mapping in the Radarr web UI (Settings › Download Clients).
Ownership and Permissions
Sonarr Vs Radarr
Permissions and ownership of files is one of the most common problems for Radarr users, both inside and outside Docker. Most images have environment variables that can be used to override the default user, group and umask, you should decide this before setting up all of your containers. The recommendation is to use a common group for all related containers so that each container can use the shared group permissions to read and write files on the mounted volumes.
Keep in mind that Radarr will need read and write to the download folders as well as the final folders.
Sonarr For Linux
For a more detailed explanation of these issues, see The Best Docker Setup and Docker Guide wiki article.