-#!/bin/bash -x
+#!/bin/bash
+# Copyright (C) 2016 Ian Kelling
+
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
# Setup dhcp server to point to tftp server,
# and depending on the type, setup the tftp server.
# usage: $0 TYPE
-# default distro is the base debian/fedora type. others are fai & arch
+# default distro is the base debian/fedora type. others are fai & arch.
+# for no pxe server, use a no-op like : or true.
set -eE -o pipefail
trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
-if [[ ! $1 ]]; then
+
+usage() {
+ cat <<EOF
+Usage: ${0##*/} [OPTIONS] TYPE [HOST]
+One line description
+
+TYPE is one of arch, plain, fai, or : for no pxe server.
+HOST makes the pxe server only for that specific host
+
+-h|--help Print help and exit
+-- Subsequent arguments are never treated as options
+-p Persist. Otherwise, wait for dhcp acks then remove.
+-r Don't redeploy fai config.
+-a Wait for 2 dhcp acks instead of the default 3. Some distros
+ do 2, some do 3.
+EOF
+ exit $1
+}
+
+##### begin command line parsing ########
+
+persist=false
+args=()
+redep=true
+acks=3
+while [[ $1 ]]; do
+ case $1 in
+ --) shift; break ;;
+ -h|--help) usage ;;
+ -r) redep=false; shift ;;
+ -p) persist=true; shift ;;
+ -a) acks=2; shift ;;
+ *) args+=("$1"); shift ;;
+ esac
+done
+args+=("$@")
+
+
+read type host <<<"${args[@]}"
+
+if [[ ! $type ]]; then
echo "$0: error: exptected 1 argument of type"
+ usage 1
fi
-action=$1
+
+if [[ $host ]]; then
+ host_tag="tag:$host,"
+fi
+
+case $type in
+ :|true) persist=true ;;
+ arch) acks=2 ;;
+esac
+
+##### end command line parsing ########
+
+sv() {
+ echo "$@"
+ "$@"
+}
arch() {
- plain-tftp
- cat <<'EOF'
+ cat <<EOF
dhcp-option-force=209,boot/syslinux/archiso.cfg
dhcp-option-force=210,/arch/
-dhcp-boot=/arch/boot/syslinux/lpxelinux.0
+dhcp-boot=${host_tag}/arch/boot/syslinux/lpxelinux.0
EOF
}
-plain-tftp() {
+plain() {
# if arch was used before, this additionally needs
# the tftp link in /mnt/usb to be changed.
- cat <<'EOF'
-enable-tftp
-tftp-root=/mnt/usb/tftpboot
-dhcp-boot=pxelinux.0
+ cat <<EOF
+dhcp-boot=${host_tag}pxelinux.0
EOF
}
fai() {
- cat <<'EOF'
-dhcp-boot=fai/pxelinux.0,faiserver.lan,faiserver.lan
+ cat <<EOF
+$set_host_tag
+dhcp-boot=${host_tag}fai/pxelinux.0,faiserver.lan,faiserver.lan
EOF
}
+ack-wait() {
+ wait_count=$1
+ if [[ $host ]]; then
+ host_regex=" $host"
+ fi
+ regex=".*DHCPACK.*$host_regex$"
+ i=0
+ tmp=$(mktemp)
+ while (( i != wait_count )) && read line; do
+ if [[ $line =~ $regex ]]; then
+ i=$((i+1))
+ echo $line
+ fi
+ done < <(ssh wrt logread -f)
+ sv sleep 5
+}
-$action | ssh wrt "cedit pxe-server /etc/dnsmasq.conf || /etc/init.d/dnsmasq restart
-if [[ $action == arch ]]; then arch-pxe-mount; fi"
+set-pxe() {
+ ${1:-$type} | ssh wrt "cedit pxe-server /etc/dnsmasq.conf || /etc/init.d/dnsmasq restart
+if [[ $type == arch ]]; then arch-pxe-mount; fi"
+}
+
+set-pxe
+
+if [[ $type == fai ]]; then
+ if $redep; then
+ fai-redep
+ fi
+ faiserver-enable
+fi
+
+if ! $persist; then
+ # fai's debian jessie 8.5ish does 2 dhcp requests when booting,
+ # roughly 4 seconds apart. Earlier
+ # versions did just 1. Now testing on a vm, it does 1.
+ # bleh.
+ echo "waiting for $acks dhcp acks then disabling pxe"
+ ack-wait $acks
+ set-pxe :
+ if [[ $type == fai ]]; then
+ # fai server can contain sensitive info, so turn it off
+ # when it's not in use.
+ echo "waiting for 1 dhcp ack then disabling fai server"
+ ack-wait 1
+ faiserver-disable
+ fi
+fi