#!/bin/bash
+# Copyright (C) 2016 Ian Kelling
-# Setup dhcp server to point to tftp server,
-# and depending on the type, setup the tftp server.
+# 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.
-# usage: $0 TYPE
-# default distro is the base debian/fedora type. others are fai & arch.
-# for no pxe server, use a no-op like : or true.
+# 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.
-set -eE -o pipefail
-trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+
+
+x="$(readlink -f "$BASH_SOURCE")"; source "${x%/*}/bash-trace"
usage() {
cat <<EOF
-Usage: ${0##*/} [OPTIONS] TYPE [HOST]
-One line description
+Usage: ${0##*/} [OPTIONS] [HOST TYPE]
+Configure dnsmasq boot options and fai-chboot if appropriate.
+
+Without HOST TYPE, disable server and fai server.
+
+HOST A hostname known to the dhcp server, or default for all.
+TYPE One of arch, plain, fai.
+
+-d Don't alter dhcp config. Only make sense for fai type, and on network
+ other than home network.
+-r Don't redeploy fai config. For example, if there is a different host
+ that is mid-install.
+
+-a Don't setup pxe, just 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.
+-S sets FAI_ACTION=sysinfo, see myfai-chboot for more info.
+-w Setup pxe, then wait like -a.
+-h|--help Print help and exit
-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 2 dhcp acks then remove.
--r Don't redeploy fai config.
+Note, when switching between plain and arch, you will need to
+do something like:
+ssh wrt
+cd /mnt/usb
+rm tftpboot
+ln -s <arch/debian iso dir> tftpboot
+
+
+Note: Uses GNU getopt options parsing style
EOF
exit $1
}
##### begin command line parsing ########
-persist=false
-args=()
+dhcp=true
redep=true
-while [[ $1 ]]; do
+acks=2
+wait=false
+temp=$(getopt -l help adrSwh "$@") || usage 1
+eval set -- "$temp"
+while true; do
case $1 in
- --) shift; break ;;
- -h|--help) usage ;;
+ -a) wait=true; set=false; shift ;;
+ -d) dhcp=false; shift ;;
-r) redep=false; shift ;;
- -p) persist=true; shift ;;
- *) args+=("$1"); shift ;;
+ -S) chboot_arg=-S; shift ;;
+ -w) wait=true; set=true; shift ;;
+ -h|--help) usage ;;
+ --) shift; break ;;
+ *) echo "$0: Internal error!" ; exit 1 ;;
esac
done
-args+=("$@")
+read -r host type <<<"$@"
-read type host <<<"${args[@]}"
+case $# in
+ 0|2);;
+ *)
+ echo "$0: error: expected 0 or 2 arguments"
+ echo
+ usage 1
+ ;;
+esac
-if [[ ! $type ]]; then
- echo "$0: error: exptected 1 argument of type"
- usage 1
+if $wait && ! $dhcp; then
+ echo "$0: error -w conflicts with -d, choose one or other"
+ exit 1
fi
-if [[ $host ]]; then
+
+if [[ $host && $host != default ]]; then
host_tag="tag:$host,"
fi
-case $type in
- :|true) persist=true ;;
-esac
-
##### end command line parsing ########
-sv() {
+e() {
echo "$@"
"$@"
}
fai() {
cat <<EOF
-$set_host_tag
-dhcp-boot=${host_tag}fai/pxelinux.0,faiserver.lan,faiserver.lan
+dhcp-boot=${host_tag}pxelinux.0,faiserver.b8.nz,faiserver.b8.nz
EOF
}
fi
regex=".*DHCPACK.*$host_regex$"
i=0
- tmp=$(mktemp)
- while (( i != wait_count )) && read line; do
+ while (( i != wait_count )) && read -r line; do
if [[ $line =~ $regex ]]; then
i=$((i+1))
echo $line
fi
done < <(ssh wrt logread -f)
- sv sleep 5
+ e sleep 20
}
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"
+ $dhcp || return 0
+ echo "$0: updating dnsmasq.conf:"
+ $type
+ ${type:-:}|ssh wrt "cedit pxe /etc/dnsmasq.conf || /etc/init.d/dnsmasq restart
+$([[ $type == arch ]] && echo arch-pxe-mount)"
}
-set-pxe
-if [[ $type == fai ]]; then
- if $redep; then
- fai-redep
+if $set; then
+ set-pxe
+ if [[ $type == fai ]]; then
+ e myfai-chboot $chboot_arg $host
+ if $redep; then
+ e fai-redep
+ fi
+ else
+ # This will fail if faiserver is not setup, so ignore any
+ # failure and don't bother us about it.
+ myfai-chboot &>/dev/null ||:
fi
- faiserver-enable
fi
-if ! $persist; then
- echo "waiting for 2 dhcp acks then disabling pxe"
- ack-wait 2
- 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
+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
+ type=
+ 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