-#!/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.
TYPE is one of arch, plain, fai, or : for no pxe server.
HOST makes the pxe server only for that specific host
+-r Don't redeploy fai config.
+-a Wait for 2 dhcp acks, then disable the pxe server after a delay.
+ First ack is for pxe boot, 2nd ack is for os boot. Sometimes
+ on debian, there is a 3rd one shortly after the 2nd. I can't remember
+ exactly why this caused a problem, but I'm hoping the sleep
+ will take care of it.
+-w Initially setup pxe, then wait like -a.
-h|--help Print help and exit
--- Subsequent arguments are never treated as options
+
+
+Note: Uses GNU getopt options parsing style
EOF
exit $1
}
##### begin command line parsing ########
-
args=()
-while [[ $1 ]]; do
+redep=true
+acks=2
+wait=false
+temp=$(getopt -l help harw "$@") || usage 1
+eval set -- "$temp"
+while true; do
case $1 in
- --) shift; break ;;
+ -a) wait=true; set=false; shift ;;
+ -r) redep=false; shift ;;
+ -w) wait=true; set=true; shift ;;
-h|--help) usage ;;
- *) args+=("$1"); shift ;;
+ --) shift; break ;;
+ *) echo "$0: Internal error!" ; exit 1 ;;
esac
done
-args+=("$@")
-
-read type host <<<"${args[@]}"
+read type host <<<"$@"
if [[ ! $type ]]; then
echo "$0: error: exptected 1 argument of type"
##### end command line parsing ########
+e() {
+ echo "$@"
+ "$@"
+}
+
arch() {
- plain
cat <<EOF
dhcp-option-force=209,boot/syslinux/archiso.cfg
dhcp-option-force=210,/arch/
# if arch was used before, this additionally needs
# the tftp link in /mnt/usb to be changed.
cat <<EOF
-enable-tftp
-tftp-root=/mnt/usb/tftpboot
dhcp-boot=${host_tag}pxelinux.0
EOF
}
fai() {
cat <<EOF
$set_host_tag
-dhcp-boot=${host_tag}fai/pxelinux.0,faiserver.lan,faiserver.lan
+dhcp-boot=${host_tag}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 $line
+ fi
+ done < <(ssh wrt logread -f)
+ e sleep 20
+}
-$type | ssh wrt "cedit pxe-server /etc/dnsmasq.conf || /etc/init.d/dnsmasq restart
+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"
+}
+
+
+if $set; then
+ set-pxe
+
+ if [[ $type == fai ]]; then
+ if $redep; then
+ fai-redep
+ fi
+ faiserver-enable
+ fi
+fi
+
+if $wait; 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 :
+
+ # previously tried waiting for one more ack then disabling faiserver,
+ # since it can contain sensitive info, so turn it off when not in use,
+ # but disabling that for now as it's inconvenient to clean this
+ # up and run it in the background etc.
+
+ # if [[ $type == fai ]]; then
+ # echo "waiting for 1 dhcp ack then disabling fai server"
+ # ack-wait 1
+ # faiserver-disable
+ # fi
+fi