Package: lxc-templates Version: 3.0.4-5 Severity: normal Affects: openvpn Dear Maintainer,
After upgrading to bullseye, my container with openvpn failed to start. The syslog error message is: ERROR: Cannot open TUN/TAP dev /dev/net/tun: Operation not permitted (errno=1) and indeed "cat /dev/net/tun" fails with that same error. I traced the problem to cgroup2 migration. Adding lxc.cgroup2.devices.allow = c 10:200 rwm in my container config file fixed the issue. I believe cgroup2 support should be added generally in /usr/share/lxc/config/debian.common.conf with keys for both cgroup1 and cgroup2 in a way that is similar to /usr/share/lxc/config/common.conf Please add cgroup2 support. Thank you
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