docker-documentation/FAQ.md

FAQ

Here will some Frequently Asked Questions reside

My host is incompatible with images based on Ubuntu Focal

This seems to only affect armhf.

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, some are short-term.

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 recive the same care as latest for the foreseeable future.

2. 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 install -t buster-backports libseccomp2
   

3. Manually install a 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 -o libseccomp2.deb
   sudo dpkg -i libseccomp2.deb
   

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

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.

Symptoms of this can be:

• 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
• docker exec <container-name> date returns 1970