[libvirt] Re: the <filesystem> tag (WAS: simple LXC/libvirt busybox container (Unable to get cgroup))

wow! i was starting to think i would never get past this problem! [root@PHS-001 ~]# echo $VIRSH_DEFAULT_CONNECT_URI lxc:/// [root@PHS-001 ~]# virsh create /vps/def/exec/sys/arch-nano.xml Domain arch-nano created from /vps/def/exec/sys/arch-nano.xml [root@PHS-001 ~]# virsh console arch-nano Connected to domain arch-nano Escape character is ^] # [root@PHS-001 ~]# grep cgroup /proc/mounts none /cgroup cgroup rw,relatime,devices,memory,cpuacct,cpu 0 0 everything seems to be working fine now after disabling "ns" from cgroup mount; thank you very much Ryota and Daniel for you time and assistance. i must have sunk 40+ hours into this, but i learned a tremendous amount, so nothing is lost. :-) this is somewhat of a digression, and i can submit a new thread if need be, but my last remaining question is about the <filesystem> tag/root mounting. i have not found any mention of the <filesystem> tag in the docs or how to work with it... i want to have libvirt mount a specified device (a btrfs subvolume) and use it for the root filesystem of the created LXC container. is there a way to do this? perhaps <source dev="/dev/sdb" options="subvol....."/>, or do i need to use the storage XML? i didnt see a way to use a storage/device definition as the rootfs.