iankelling.org Git - automated-distro-installer/blob - myfai-chboot-local

   1 #!/bin/bash
   2
   3 # note, this script gets piped to bash, so cant cd to current dir
   4 set -eE -o pipefail
   5 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
   6
   7
   8 fai_action_arg=I
   9 fai_reboot_arg=,reboot
  10 case $1 in
  11     -h|--help)
  12         echo "see help from myfai-chboot"
  13         exit 0
  14         ;;
  15     -S)
  16         fai_action_arg=S
  17         fai_reboot_arg=
  18         shift
  19         ;;
  20 esac
  21
  22 [[ $EUID == 0 ]] || exec sudo "${BASH_SOURCE}" "$@"
  23
  24 e() {
  25     echo "$*"
  26     if ! "$@"; then
  27         echo "$0: error: exit code $? from: $*"
  28         exit 1
  29     fi
  30 }
  31
  32 host=$1
  33
  34 type -t host &>/dev/null || apt-get -y install dnsutils
  35 gateway_if=$(ip route | sed -rn 's/^default via \S+ dev (\S+) .*/\1/p')
  36 if [[ ! $gateway_if ]]; then
  37     echo "$0: failed to find gateway interface"
  38     exit 1
  39 fi
  40 # assuming ipv4, or else we might need to deal with multiple addresses
  41 # in an ipv4 + ipv6 network.
  42 network=$(ip -4 -o a show dev $gateway_if | sed -rn '/scope.*global/s/^(\S+\s+){3}(\S+)\s.*/\2/p')
  43 if [[ ! $network ]]; then
  44     echo "$0: failed to find network"
  45     exit 1
  46 fi
  47 my_ip=${network%/*}
  48 if [[ $host == default ]]; then
  49     ip=$network
  50 elif [[ $host == [0-9]*.[0-9]*.[0-9]*.[0-9]* ]]; then
  51     ip=$host
  52 else
  53     ip=$(host $host | sed -rn 's/^\S+ has address //p;T;q')/32
  54 fi
  55
  56
  57 # alternate way of getting my ip
  58 #gateway_ip=$(ip route | sed -rn 's/^default via (\S+) .*/\1/p')
  59 #my_ip=$(host faiserver $gateway_ip | sed -rn 's/^\S+ has address //p;T;q')
  60
  61 if modprobe nfsd &>/dev/null; then
  62     std_arg="-u nfs://faiserver/srv/fai/config"
  63     root_arg="$my_ip:/srv/fai/nfsroot"
  64     # fai-setup without -e sets the ip to the local_ip/local_network, eg 192.168.1.3/24
  65     # I restrict it to one ip as simple but imperfect access control.
  66     sed -ri --follow-symlinks '\%^/srv/fai/%d' /etc/exports
  67     cat >>/etc/exports <<EOF
  68 /srv/fai/config $ip(async,ro,no_subtree_check)
  69 /srv/fai/nfsroot $ip(async,ro,no_subtree_check,no_root_squash)
  70 EOF
  71     exportfs -ra
  72 else
  73     std_arg="-u http://faiserver:8080/config.tar.gz"
  74     root_arg="live:http://faiserver:8080/squash.img"
  75     /a/exe/web-conf -i -p 8080 - apache2 faiserver <<EOF
  76 <Location />
  77     Deny from all
  78     Allow from $ip
  79 </Location>
  80 EOF
  81 fi
  82
  83 rm -f /srv/tftp/fai/pxelinux.cfg/*
  84 if [[ ! $1 ]]; then
  85     exit 0
  86 fi
  87
  88
  89 # man page doesn't explain this, but this deletes & thus disables
  90 # all chboot systems.
  91 e fai-chboot -${fai_action_arg}v $std_arg default # set it to default to get a val out of it next
  92 kernel=$(fai-chboot -L '^default$' | awk '{print $3}')
  93 default_k_args=$(fai-chboot -L '^default$' | \
  94                      sed -r "s/^(\S+\s+){3}(.*)/\2/")
  95 # example of default_k_args
  96 # initrd=initrd.img-3.16.0-4-amd64 ip=dhcp root=192.168.1.3:/srv/fai/nfsroot aufs FAI_CONFIG_SRC=nfs://faiserver/srv/fai/config FAI_ACTION=install
  97
  98 k_args=()
  99 for arg in $default_k_args; do
 100     case $arg in
 101         # default root arg is /srv/fai/nfsroot
 102         root=*) k_args+=(root=$root_arg) ;;
 103         *) k_args+=($arg) ;;
 104     esac
 105 done
 106 rm -f /srv/tftp/fai/pxelinux.cfg/*
 107 e fai-chboot -k "${k_args[*]}" -v -f verbose,sshd,createvt$fai_reboot_arg $std_arg $kernel "$host"