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 netplan_yaml() {
   7     # network configuration using ubuntu's netplan.io
   8     local IFNAME="$1"
   9     local METHOD="$2"
  10     echo     "Generating netplan configuration for $IFNAME ($METHOD)" >&2
  11     echo     "# generated by FAI"
  12     echo     "network:"
  13     echo     "  version: 2"
  14     echo     "  renderer: $RENDERER"
  15     case "$RENDERER" in
  16       networkd)
  17         echo     "  ethernets:"
  18         echo     "    $IFNAME:"
  19         case "$METHOD" in
  20           dhcp)
  21             echo "      dhcp4: true"
  22             ;;
  23           static)
  24             echo "      addresses: [$CIDR]"
  25             echo "      gateway4: $GATEWAYS_1"
  26             echo "      nameservers:"
  27             echo "        search: [$DOMAIN]"
  28             echo "        addresses: [${DNSSRVS// /, }]"
  29             ;;
  30         esac
  31     esac
  32 }
  33
  34 iface_stanza() {
  35     # classic network configuration using /etc/network/interfaces
  36     local IFNAME="$1"
  37     local METHOD="$2"
  38     echo "Generating interface configuration for $IFNAME ($METHOD)" >&2
  39     echo "# generated by FAI"
  40     echo "auto $IFNAME"
  41     echo "iface $IFNAME inet $METHOD"
  42     case "$METHOD" in
  43       static)
  44         echo "    address $IPADDR"
  45         echo "    netmask $NETMASK"
  46         echo "    broadcast $BROADCAST"
  47         echo "    gateway $GATEWAYS"
  48         ;;
  49     esac
  50 }
  51
  52 newnicnames() {
  53
  54     # determine predictable network names only for stretch and above
  55
  56     [ $do_init_tasks -eq 0 ] && return
  57     [ -z "$NIC1" ] && return
  58     ver=$($ROOTCMD dpkg-query --showformat='${Version}' --show udev)
  59     if dpkg --compare-versions $ver lt 220-7; then
  60         return
  61     fi
  62
  63
  64     fields="ID_NET_NAME_FROM_DATABASE ID_NET_NAME_ONBOARD ID_NET_NAME_SLOT ID_NET_NAME_PATH"
  65     for field in $fields; do
  66         name=$(udevadm info /sys/class/net/$NIC1 | sed -rn "s/^E: $field=(.+)/\1/p")
  67         if [[ $name ]]; then
  68             NIC1=$name
  69             break
  70         fi
  71     done
  72     # This condition is only needed because the nfsroot I use
  73     # is based on Jessie, which has an old udev which can't
  74     # figure out the persistent interface name used in stretch.
  75     if ifclass VM; then NIC1=ens3; return; fi
  76     if [[ ! $name ]]; then
  77         echo "$0: error: could not find systemd predictable network name. Using $NIC1."
  78     fi
  79 }
  80
  81 if [ -z "$NIC1" ]; then
  82     echo "WARNING: \$NIC1 is not defined. Cannot add ethernet to /etc/network/interfaces."
  83 fi
  84 CIDR=$(ip -o -f inet addr show $NIC1 | awk '{print $4}')
  85 newnicnames
  86
  87 case "$FAI_ACTION" in
  88   install|dirinstall)
  89     ifclass DHCPC && METHOD=dhcp || METHOD=static
  90     ifclass XORG && RENDERER=NetworkManager || RENDERER=networkd
  91
  92     if [ -d $target/etc/netplan ]; then
  93         # Ubuntu >= 17.10 with netplan.io
  94         if [ -n "$NIC1" ]; then
  95             netplan_yaml $NIC1 $METHOD > $target/etc/netplan/01-${NIC1}.yaml
  96         fi
  97     elif [ -d $target/etc/network/interfaces.d ]; then
  98         # ifupdown >= 0.7.41 (Debian >= 8, Ubuntu >= 14.04)
  99
 100       if ifclass VM; then
 101         # note, this condition would apply to the elif below too,
 102         # but I don't specify a static ip in fai, so not bothering
 103         cat > $target/etc/network/interfaces <<-EOF
 104         # generated by FAI
 105         auto lo $NIC1
 106         iface lo inet loopback
 107         iface $NIC1 inet dhcp
 108 EOF
 109       else
 110         cat > $target/etc/network/interfaces <<-EOF
 111         # generated by FAI
 112         auto lo br0
 113         iface lo inet loopback
 114         iface $NIC1 inet manual
 115         # make a bridge by default so we can have bridged vms.
 116         # Some example I read had stp on, but i don't need stp,
 117         # and it causes a vm to fail pxe boot, presumably unless
 118         # you add some delay.
 119         # http://wiki.libvirt.org/page/PXE_boot_%28or_dhcp%29_on_guest_failed
 120         iface br0 inet dhcp
 121           bridge_ports $NIC1
 122           bridge_stp off
 123           bridge_maxwait 0
 124 EOF
 125       fi
 126     else
 127       (
 128         iface_stanza lo loopback
 129         iface_stanza $NIC1 $METHOD
 130       ) > $target/etc/network/interfaces
 131     fi
 132
 133     if ! ifclass DHCPC ; then
 134         [ -n "$NETWORK" ] && echo "localnet $NETWORK" > $target/etc/networks
 135         if [ ! -L $target/etc/resolv.conf -a -e /etc/resolv.conf ]; then
 136             cp -p /etc/resolv.conf $target/etc
 137         fi
 138     fi
 139     ;;
 140 esac
 141
 142 # here fcopy is mostly used, when installing a client for running in a
 143 # different subnet than during the installation
 144 fcopy -iM /etc/resolv.conf
 145 fcopy -iM /etc/network/interfaces /etc/networks
 146
 147 exit $error