Hello,
Just spend Hours trying tho make apcupsd run in a LXC.
I've an APC USB UPS connected on the host
I've passed the usb to the LXC this way in the LXC conf:
lxc.cgroup.devices.allow: c 189:* rwm
lxc.mount.entry: /dev/bus/usb/001 dev/bus/usb/001 none bind,optional,create=dir
and run this on...