The root cause of the problem [is in libseccomp When][1]. The newer version fixes the problem, but it is not yet available in Debian's stable repos. There are two way to fix this problem:
**Method 1** Start the container with `--privileged`. This bypasses docker's security measures, so it is not recommended. **Method 2** Upgrade libseccomp manually. Dowload version from unstable repos (I tested with 2.4.3-1) [here][2]. Uninstall the current version: `sudo dpkg --force-all -P libseccomp2` Install the new version: `sudo dpkg -i libseccomp2_2.4.3-1+b1_armhf.deb` [1]: https://github.com/moby/moby/issues/40734 [2]: https://packages.debian.org/sid/libseccomp2 ** Bug watch added: github.com/moby/moby/issues #40734 https://github.com/moby/moby/issues/40734 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apt in Ubuntu. https://bugs.launchpad.net/bugs/1890332 Title: apt update fails on docker arm container 20.04 Status in apt package in Ubuntu: New Bug description: Running `apt update` in a ubuntu:20.04 docker container on raspberry pi fails with GPG errors. Expected behaviour: Successfully update the system through `apt update` What happens instead: `Err:1 http://ports.ubuntu.com/ubuntu-ports focal InRelease At least one invalid signature was encountered.` Complete log: https://pastebin.com/sggGJcY1 How to reproduce: On a Raspberry Pi 3b or 4b (and maybe others ?), run the following command: `docker run ubuntu:latest apt update` or more specifically: `docker run arm32v7/ubuntu:20.04 apt update` More information: I can reproduce the bug on the following host systems: * Raspberry Pi 3b running HypriotOS * Raspberry Pi 4b running Raspbian GNU/Linux 10 (buster) The problem does not happens on the following host system: * Raspberry Pi 3b running Arch Linux Arm To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1890332/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
