iankelling.org Git - automated-distro-installer/blob - fai/config/scripts/DEBIAN/30-interface

   1 #! /bin/bash
   2
   3 # modified from upstream fai example
   4 error=0; trap 'error=$(($?>$error?$?:$error))' ERR # save maximum error code
   5
   6 newnicnames() {
   7
   8     # determine predictable network names only for stretch and above
   9
  10     [ $do_init_tasks -eq 0 ] && return
  11
  12     ver=$($ROOTCMD dpkg-query --showformat='${Version}' --show udev)
  13     if dpkg --compare-versions $ver lt 220-7; then
  14         return
  15     fi
  16
  17     [ -z "$NIC1" ] && return
  18
  19     fields="ID_NET_NAME_FROM_DATABASE ID_NET_NAME_ONBOARD ID_NET_NAME_SLOT ID_NET_NAME_PATH"
  20     for field in $fields; do
  21         name=$(udevadm info /sys/class/net/$NIC1 | sed -rn "s/^E: $field=(.+)/\1/p")
  22         if [[ $name ]]; then
  23             NIC1=$name
  24             break
  25         fi
  26     done
  27     # This condition is only needed because the nfsroot I use
  28     # is based on Jessie, which has an old udev which can't
  29     # figure out the persistent interface name used in stretch.
  30     if ifclass VM; then NIC1=ens3; return; fi
  31     if [[ ! $name ]]; then
  32         echo "$0: error: could not find systemd predictable network name. Using $NIC1."
  33     fi
  34 }
  35
  36 if [ -z "$NIC1" ]; then
  37     echo "ERROR: \$NIC1 is not defined. Cannot configure /etc/network/interfaces properly."
  38 fi
  39 newnicnames
  40 CIDR=$(ip -o -f inet addr show $NIC1 | awk '{print $4}')
  41 if ifclass DHCPC && [ $FAI_ACTION = "install" -o $FAI_ACTION = "dirinstall" ]; then
  42
  43     if ifclass VM; then
  44         # note, this condition would apply to the elif below too,
  45         # but I don't specify a static ip in fai, so not bothering
  46         cat > $target/etc/network/interfaces <<-EOF
  47         # generated by FAI
  48         auto lo $NIC1
  49         iface lo inet loopback
  50         iface $NIC1 inet dhcp
  51 EOF
  52     else
  53         cat > $target/etc/network/interfaces <<-EOF
  54         # generated by FAI
  55         auto lo br0
  56         iface lo inet loopback
  57         iface $NIC1 inet manual
  58         # make a bridge by default so we can have bridged vms.
  59         # Some example I read had stp on, but i don't need stp,
  60         # and it causes a vm to fail pxe boot, presumably unless
  61         # you add some delay.
  62         # http://wiki.libvirt.org/page/PXE_boot_%28or_dhcp%29_on_guest_failed
  63         iface br0 inet dhcp
  64           bridge_ports $NIC1
  65           bridge_stp off
  66           bridge_maxwait 0
  67 EOF
  68     fi
  69 elif [ $FAI_ACTION = "install" -o $FAI_ACTION = "dirinstall" ]; then
  70     [ -n "$CIDR" ] && cat > $target/etc/network/interfaces <<-EOF
  71         # generated by FAI
  72         auto lo $NIC1
  73         iface lo inet loopback
  74         iface $NIC1 inet static
  75           address $CIDR
  76           gateway $GATEWAYS
  77 EOF
  78     [ -n "$NETWORK" ] && echo "localnet $NETWORK" > $target/etc/networks
  79     if [ ! -L $target/etc/resolv.conf -a -e /etc/resolv.conf ]; then
  80         cp -p /etc/resolv.conf $target/etc
  81     fi
  82 fi
  83
  84 # here fcopy is mostly used, when installing a client for running in a
  85 # different subnet than during the installation
  86 fcopy -iM /etc/resolv.conf
  87 fcopy -iM /etc/network/interfaces /etc/networks
  88
  89 exit $error