#! /bin/bash
+# modified from upstream fai example
error=0; trap 'error=$(($?>$error?$?:$error))' ERR # save maximum error code
-if ifclass DHCPC && [ $FAI_ACTION = "install" ]
-then
- cat > $target/etc/network/interfaces <<-EOF
+newnicnames() {
+
+ # determine predictable network names only for stretch and above
+
+ [ $do_init_tasks -eq 0 ] && return
+
+ ver=$($ROOTCMD dpkg-query --showformat='${Version}' --show udev)
+ if dpkg --compare-versions $ver lt 220-7; then
+ return
+ fi
+
+ [ -z "$NIC1" ] && return
+
+ fields="ID_NET_NAME_FROM_DATABASE ID_NET_NAME_ONBOARD ID_NET_NAME_SLOT ID_NET_NAME_PATH"
+ for field in $fields; do
+ name=$(udevadm info /sys/class/net/$NIC1 | sed -rn "s/^E: $field=(.+)/\1/p")
+ if [[ $name ]]; then
+ NIC1=$name
+ break
+ fi
+ done
+ # This condition is only needed because the nfsroot I use
+ # is based on Jessie, which has an old udev which can't
+ # figure out the persistent interface name used in stretch.
+ if ifclass VM; then NIC1=ens3; return; fi
+ if [[ ! $name ]]; then
+ echo "$0: error: could not find systemd predictable network name. Using $NIC1."
+ fi
+}
+
+if [ -z "$NIC1" ]; then
+ echo "ERROR: \$NIC1 is not defined. Cannot configure /etc/network/interfaces properly."
+fi
+newnicnames
+CIDR=$(ip -o -f inet addr show $NIC1 | awk '{print $4}')
+if ifclass DHCPC && [ $FAI_ACTION = "install" -o $FAI_ACTION = "dirinstall" ]; then
+
+ if ifclass VM; then
+ # note, this condition would apply to the elif below too,
+ # but I don't specify a static ip in fai, so not bothering
+ cat > $target/etc/network/interfaces <<-EOF
# generated by FAI
auto lo $NIC1
iface lo inet loopback
iface $NIC1 inet dhcp
EOF
-elif [ $FAI_ACTION = "install" ]
-then
- [ -n "$IPADDR" ] && cat > $target/etc/network/interfaces <<-EOF
+ else
+ cat > $target/etc/network/interfaces <<-EOF
+ # generated by FAI
+ auto lo br0
+ iface lo inet loopback
+ iface $NIC1 inet manual
+ # make a bridge by default so we can have bridged vms.
+ # Some example I read had stp on, but i don't need stp,
+ # and it causes a vm to fail pxe boot, presumably unless
+ # you add some delay.
+ # http://wiki.libvirt.org/page/PXE_boot_%28or_dhcp%29_on_guest_failed
+ iface br0 inet dhcp
+ bridge_ports $NIC1
+ bridge_stp off
+ bridge_maxwait 0
+EOF
+ fi
+elif [ $FAI_ACTION = "install" -o $FAI_ACTION = "dirinstall" ]; then
+ [ -n "$CIDR" ] && cat > $target/etc/network/interfaces <<-EOF
# generated by FAI
auto lo $NIC1
iface lo inet loopback
iface $NIC1 inet static
- address $IPADDR
- netmask $NETMASK
- broadcast $BROADCAST
+ address $CIDR
gateway $GATEWAYS
EOF
[ -n "$NETWORK" ] && echo "localnet $NETWORK" > $target/etc/networks