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     if [[ ! $name ]]; then
  73         echo "$0: error: could not find systemd predictable network name. Using $NIC1."
  74     fi
  75 }
  76
  77 if [ -z "$NIC1" ]; then
  78     echo "WARNING: \$NIC1 is not defined. Cannot add ethernet to /etc/network/interfaces."
  79 fi
  80 CIDR=$(ip -o -f inet addr show $NIC1 | awk '{print $4}')
  81 newnicnames
  82
  83 case "$FAI_ACTION" in
  84   install|dirinstall)
  85     ifclass DHCPC && METHOD=dhcp || METHOD=static
  86     ifclass XORG && RENDERER=NetworkManager || RENDERER=networkd
  87
  88     if [ -d $target/etc/netplan ]; then
  89         # Ubuntu >= 17.10 with netplan.io
  90         if [ -n "$NIC1" ]; then
  91             netplan_yaml $NIC1 $METHOD > $target/etc/netplan/01-${NIC1}.yaml
  92         fi
  93     elif [ -d $target/etc/network/interfaces.d ]; then
  94         # ifupdown >= 0.7.41 (Debian >= 8, Ubuntu >= 14.04)
  95
  96       if ifclass VM; then
  97         # note, this condition would apply to the elif below too,
  98         # but I don't specify a static ip in fai, so not bothering
  99         cat > $target/etc/network/interfaces <<-EOF
 100 # generated by FAI
 101 auto lo $NIC1
 102 iface lo inet loopback
 103 iface $NIC1 inet dhcp
 104 iface $NIC1 inet6 auto
 105 EOF
 106
 107       elif ifclass LINODE; then
 108            # NIC1 is wrong, probably because the installer distro
 109            # is stretch and the installed one is buster.
 110            # todo: after upgrading installer to buster,
 111            # try removing this condition
 112         cat > $target/etc/network/interfaces <<EOF
 113 # generated by FAI
 114 auto lo $linode_if
 115 iface lo inet loopback
 116 iface $linode_if inet dhcp
 117 iface $linode_if inet6 auto
 118 EOF
 119
 120       else
 121         cat > $target/etc/network/interfaces <<EOF
 122 # generated by FAI
 123 auto lo br0
 124 iface lo inet loopback
 125 iface $NIC1 inet manual
 126 # make a bridge by default so we can have bridged vms.
 127 # Some example I read had stp on, but i don't need stp,
 128 # and it causes a vm to fail pxe boot, presumably unless
 129 # you add some delay.
 130 # http://wiki.libvirt.org/page/PXE_boot_%28or_dhcp%29_on_guest_failed
 131 iface br0 inet dhcp
 132   bridge_ports $NIC1
 133   bridge_stp off
 134   bridge_maxwait 0
 135 EOF
 136       fi
 137
 138       if ifclass LINODE; then
 139         mkdir -p $target/etc/initramfs-tools/conf.d
 140         cat >$target/etc/initramfs-tools/conf.d/mine <<EOF
 141 # dhcp in initramfs doesn't work on linode. i dunno why, whatever.
 142 # man 5 initramfs.conf
 143 # /usr/share/doc/klibc-utils/README.ipconfig.gz
 144 # /usr/share/initramfs-tools/scripts/functions
 145 IP=$linode_ip::$linode_gw:255.255.255.0::$linode_if:off
 146 EOF
 147       fi
 148
 149     else
 150       (
 151         iface_stanza lo loopback
 152         iface_stanza $NIC1 $METHOD
 153       ) > $target/etc/network/interfaces
 154     fi
 155
 156     if ! ifclass DHCPC ; then
 157         [ -n "$NETWORK" ] && echo "localnet $NETWORK" > $target/etc/networks
 158         if [ ! -L $target/etc/resolv.conf -a -e /etc/resolv.conf ]; then
 159             cp -p /etc/resolv.conf $target/etc
 160         fi
 161     fi
 162     ;;
 163
 164 esac
 165
 166 # here fcopy is mostly used, when installing a client for running in a
 167 # different subnet than during the installation
 168 fcopy -iM /etc/resolv.conf
 169 fcopy -iM /etc/network/interfaces /etc/networks
 170
 171 exit $error