Package: lxc Version: 1:4.0.6-2+deb11u1 Severity: important Tags: newcomer X-Debbugs-Cc: linasveps...@gmail.com
Dear Maintainer, Hit the bug described here: https://github.com/systemd/systemd/issues/13477 and also here: https://github.com/lxc/lxc/issues/4072 According the the first github report, sometime around 2019 or earlier, 'systemd now defaults to the "unified" cgroup hierarchy setup' as explained in the second comment. This means that the directory entry `/sys/fs/cgroup/systemd` is now missing. This prevents LXC containers from booting, as explained in the second github report. Running `lxc-start -F <my-container>` reveals the error message: ``` Failed to mount cgroup at /sys/fs/cgroup/systemd: Operation not permitted ``` There are two known work-arounds, I can confirm that both work. One is to create the missing cgroup entry mainually: ``` mkdir -p /sys/fs/cgroup/systemd && mount -t cgroup cgroup -o none,name=systemd /sys/fs/cgroup/systemd ``` which is stunningly hacky and inadvisable, but it does confirm the root cause of the problem: that directory is missing. The other work-around is to boot the host and disable the unified hierarchy, like so: ``` # echo 'GRUB_CMDLINE_LINUX=systemd.unified_cgroup_hierarchy=false' > /etc/default/grub.d/cgroup.cfg # update-grub # shutdown -r now ``` Both of these work for me. LXC is 100% unusable without this. How is it possible that this has not been reported to Debian before? Am I the only person on the planet using LXC on Debian??? -- System Information: Debian Release: 11.6 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 6.0.0-0.deb11.6-amd64 (SMP w/4 CPU threads; PREEMPT) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages lxc depends on: ii bridge-utils 1.7-1 ii debconf [debconf-2.0] 1.5.77 ii dnsmasq-base [dnsmasq-base] 2.85-1 ii iproute2 5.10.0-4 ii iptables 1.8.7-1 ii libc6 2.31-13+deb11u5 ii libcap2 1:2.44-1 ii libgcc-s1 10.2.1-6 ii liblxc1 1:4.0.6-2+deb11u1 ii libseccomp2 2.5.1-1+deb11u1 ii libselinux1 3.1-3 ii lsb-base 11.1.0 Versions of packages lxc recommends: ii apparmor 2.13.6-10 ii debootstrap 1.0.123+deb11u1 ii dirmngr 2.2.27-2+deb11u2 ii gnupg 2.2.27-2+deb11u2 ii libpam-cgfs 1:4.0.6-2+deb11u1 ii lxc-templates 3.0.4-5 ii lxcfs 4.0.7-1 ii openssl 1.1.1n-0+deb11u3 ii rsync 3.2.3-4+deb11u1 ii uidmap 1:4.8.1-1 ii wget 1.21-1+deb11u1 Versions of packages lxc suggests: ii btrfs-progs 5.10.1-2 pn lvm2 <none> pn python3-lxc <none> -- debconf information: lxc/auto_update_config:
