# 1st version was relying on virsh net-dhcp-leases
# however this was too fragile, would not work for fedora14 containers
# WARNING: this code is duplicated in lbuild-initvm.sh
-function guest_ipv4() {
+function guest_ipv4_old() {
lxc=$1; shift
mac=$(virsh -c lxc:/// domiflist $lxc | grep -E 'network|bridge' | awk '{print $5;}')
- [ -z "$mac" ] && { echo 1>&2 guest_ipv4 cannot find mac; return 1; }
+ [ -z "$mac" ] && { echo 1>&2 guest_ipv4_old cannot find mac; return 1; }
ip=$(arp -en | grep "$mac" | awk '{print $1;}')
# if not known: run a ping and try again
if [ -z $ip ]; then
ping -c1 -w1 -W1 $lxc.pl.sophia.inria.fr >& /dev/null
ip=$(arp -en | grep "$mac" | awk '{print $1;}')
fi
- [ -z "$ip" ] && { echo 1>&2 guest_ipv4 cannot find ip; return 1; }
+ [ -z "$ip" ] && { echo 1>&2 guest_ipv4_old cannot find ip; return 1; }
echo $ip
}
+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
+}
+
# wrap a quick summary of suspicious stuff
# this is to focus on installation that go wrong
# use with care, a *lot* of other things can go bad as well