This is apparently related to Ubuntu's apparmor confinement of the LXC process. Running containers unconfined seems to help:
``` sudo apparmor_parser -R /etc/apparmor.d/usr.bin.lxc-start sudo ln -s /etc/apparmor.d/usr.bin.lxc-start /etc/apparmor.d/disable/ echo "lxc.apparmor.profile = unconfined" | sudo tee -a /etc/lxc/default.conf ``` See: https://discourse.ubuntu.com/t/containers-lxc/11526 (Apparmor section) -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1950787 Title: systemd-sysusers cannot mount /dev in privileged containers (to pass credentials) Status in lxd package in Ubuntu: Invalid Status in systemd package in Ubuntu: Fix Released Bug description: systemd-sysusers.service/systemd.exec fails to start in privileged containers, due to being unable to properly mount /dev for passing credentials, caused by the following config in the .service unit: ``` # Optionally, pick up a root password and shell for the root user from a # credential passed to the service manager. This is useful for importing this # data from nspawn's --set-credential= switch. LoadCredential=passwd.hashed-password.root LoadCredential=passwd.plaintext-password.root LoadCredential=passwd.shell.root ``` Reproducer: $ lxc profile set default security.privileged "true" $ lxc launch ubuntu-daily:jammy test $ lxc exec test bash # add-apt-repository ppa:ci-train-ppa-service/4704 # apt install systemd # install systemd 249.5-2ubuntu1 # systemctl restart systemd-sysusers # systemctl status systemd-sysusers # system --status=failed $ lxc profile set default security.privileged "false" A workaround is to disable it via: $ cat /etc/systemd/system/systemd-sysusers.service.d/override.conf: [Service] LoadCredential= Interesting logs: Nov 12 12:09:44 test systemd[1]: systemd-journald.service: Added fd 42 (n/a) to fd store. Nov 12 12:09:44 test systemd[431]: Mounting /dev (MS_REC|MS_SLAVE "")... Nov 12 12:09:44 test systemd[431]: Failed to mount n/a (type n/a) on /dev (MS_REC|MS_SLAVE ""): Permission denied Nov 12 12:09:44 test systemd[430]: (sd-mkdcreds) failed with exit status 1. Nov 12 12:09:44 test systemd[430]: systemd-sysusers.service: Failed to set up credentials: Protocol error Nov 12 12:09:44 test systemd[430]: systemd-sysusers.service: Failed at step CREDENTIALS spawning To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/1950787/+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
