gentoo-overlay/sys-fs/lxcfs/files/lxcfs-4.0.0.service

[Unit]
Description=FUSE filesystem for LXC
ConditionVirtualization=!container
Before=lxc.service
Documentation=man:lxcfs(1)

[Service]
ExecStartPre=/sbin/modprobe -q fuse
ExecStartPre=install -d /var/lib/lxcfs
ExecStart=/usr/bin/lxcfs /var/lib/lxcfs
KillMode=process
Restart=on-failure
ExecStopPost=-/usr/bin/fusermount -u /var/lib/lxcfs
Delegate=yes
ExecReload=/bin/kill -USR1 ${MAINPID}

[Install]
WantedBy=multi-user.target