docker-documentation/FAQ.md

FAQ

Here will some Frequently Asked Questions reside

My host is incompatible with images based on Ubuntu Focal and Alpine 3.13

This only affect 32 bit installs of distros based on Debian Buster.

This is due to a bug in the libseccomp2 library (dependency of docker itself), which is fixed. However it's not pushed to all the repositories.

A GitHub issue tracking this

You have a few options, 1 and 2 are short-term, 3 is to be considered the best option if you dont plan to reinstall the device.

Resolution

If you decide to do option 2 or 3, you should just need to restart the container after confirming you have libseccomp2.4.4 installed.

If 2 or 3 did not work, ensure you have an up-to-date install of Docker, refer to the official Docker docs for installation.

1. Use another tag, not based on Focal. At the time of writing we currently offer a bionic tag for Plex and Jellyfin that will receive the same care as latest for the foreseeable future.

2. Manually install an updated version of the library with dpkg.

   wget http://ftp.us.debian.org/debian/pool/main/libs/libseccomp/libseccomp2_2.4.4-1~bpo10+1_armhf.deb
   sudo dpkg -i libseccomp2_2.4.4-1~bpo10+1_armhf.deb
   

   Note this url may have been updated. Find the latest by browsing here.

3. Add the backports repo for DebianBuster. As seen here.

   sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 04EE7237B7D453EC 648ACFD622F3D138
   echo "deb http://deb.debian.org/debian buster-backports main" | sudo tee -a /etc/apt/sources.list.d/buster-backports.list
   sudo apt update
   sudo apt install -t buster-backports libseccomp2
   

4. Reinstall/update your OS to a version that still gets updates.

   • Any distro based on DebianStretch does not seem to have this package available
   • DebianBuster based distros can get the package trough backports, as outlined in point 2.

   RaspberryPI OS (formerly Raspbian) Can be upgraded to run with a 64bit kernel

Symptoms

• 502 errors in Jellyfin as seen in linuxserver/docker-jellyfin#71
• Error starting framework core messages in the docker log for Plex. linuxserver/docker-plex#247
• No WebUI for Radarr, even though the container is running. linuxserver/docker-radarr#118
• Images based on our Nginx base-image(Nextcloud, SWAG, Nginx, etc.) fails to generate a certificate, with a message similar to error getting time:crypto/asn1/a_time.c:330
• docker exec <container-name> date returns 1970