- local mac=$(virsh -c lxc:/// domiflist $lxc | egrep 'network|bridge' | awk '{print $5;}')
- # sanity check
- [ -z "$mac" ] && return 0
- arp -en | grep "$mac" | awk '{print $1;}'
+function guest_ipv4() {
+ lxc=$1; shift
+
+ # this gives us the libvirt_lxc pid for the container
+ local lxc_pid=$(virsh -c lxc:/// dominfo $lxc | grep '^Id:' | awk '{print $2;}' | sed -e "s|-||g")
+ [[ -z "$lxc_pid" ]] && { echo 1>&2 guest_ipv4 cannot find lxc pid; return 1; }
+ # but we need the systemd (pid=1) instance for the container
+ local systemd_pid=$(pgrep -P $lxc_pid systemd)
+ [[ -z "$systemd_pid" ]] && { echo 1>&2 guest_ipv4 cannot systemd pid; return 1; }
+ # from there we can inspect the network interfaces
+ local domip=$(nsenter -t $systemd_pid -n ip -br addr show eth0 \
+ | awk '{print $3}' \
+ | cut -d/ -f1 \
+ )
+ [ -z "$domip" ] && { echo 1>&2 guest_ipv4 cannot find ip; return 1; }
+ echo $domip