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 $NIC1."
  33     fi
  34 }
  35
  36 newnicnames
  37 CIDR=$(ip -o -f inet addr show $NIC1 | awk '{print $4}')
  38 if ifclass DHCPC && [ $FAI_ACTION = "install" -o $FAI_ACTION = "dirinstall" ]; then
  39
  40     if ifclass VM; then
  41         # note, this condition would apply to the elif below too,
  42         # but I don't specify a static ip in fai, so not bothering
  43         cat > $target/etc/network/interfaces <<-EOF
  44         # generated by FAI
  45         auto lo $NIC1
  46         iface lo inet loopback
  47         iface $NIC1 inet dhcp
  48 EOF
  49     else
  50         cat > $target/etc/network/interfaces <<-EOF
  51         # generated by FAI
  52         auto lo br0
  53         iface lo inet loopback
  54         iface $NIC1 inet manual
  55         # make a bridge by default so we can have bridged vms.
  56         # Some example I read had stp on, but i don't need stp,
  57         # and it causes a vm to fail pxe boot, presumably unless
  58         # you add some delay.
  59         # http://wiki.libvirt.org/page/PXE_boot_%28or_dhcp%29_on_guest_failed
  60         iface br0 inet dhcp
  61           bridge_ports $NIC1
  62           bridge_stp off
  63           bridge_maxwait 0
  64 EOF
  65     fi
  66 elif [ $FAI_ACTION = "install" -o $FAI_ACTION = "dirinstall" ]; then
  67     [ -n "$CIDR" ] && cat > $target/etc/network/interfaces <<-EOF
  68         # generated by FAI
  69         auto lo $NIC1
  70         iface lo inet loopback
  71         iface $NIC1 inet static
  72           address $CIDR
  73           gateway $GATEWAYS
  74 EOF
  75     [ -n "$NETWORK" ] && echo "localnet $NETWORK" > $target/etc/networks
  76     if [ ! -L $target/etc/resolv.conf -a -e /etc/resolv.conf ]; then
  77         cp -p /etc/resolv.conf $target/etc
  78     fi
  79 fi
  80
  81 # here fcopy is mostly used, when installing a client for running in a
  82 # different subnet than during the installation
  83 fcopy -iM /etc/resolv.conf
  84 fcopy -iM /etc/network/interfaces /etc/networks
  85
  86 exit $error