X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;f=pxe-server;h=944620ecc6647a2b20295b3d28c6576c1deafc9a;hb=8d5ef1a7a61d7475823452f47f5b4cd7a06722e8;hp=2e8b2a40c267dcb6cdd8e79390b625e423a03583;hpb=a43d3eec943c5f0491b300214a3c744d31a6e542;p=automated-distro-installer

diff --git a/pxe-server b/pxe-server
index 2e8b2a4..944620e 100755
--- a/pxe-server
+++ b/pxe-server
@@ -1,36 +1,206 @@
-#!/bin/bash -x
+#!/bin/bash
+# Copyright (C) 2016 Ian Kelling
 
-# usage: $0 [TYPE]
-# default distro is the base debian/fedora type. others are fai &  arch
+# 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.
 
-set -eE -o pipefail
-trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?"' ERR
+# 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.
 
-action=${1:-default}
+# 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.
 
-arch() {
-    default
-    cat <<'EOF'
-dhcp-option-force=209,boot/syslinux/archiso.cfg
-dhcp-option-force=210,/arch/
-dhcp-boot=/arch/boot/syslinux/lpxelinux.0
+
+
+x="$(readlink -f "$BASH_SOURCE")"; source "${x%/*}/bash-trace"
+
+
+usage() {
+  cat <<EOF
+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, parabola, 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.
+-k         Pass -k to myfai-chboot.
+-w         Setup pxe, then wait like -a.
+-h|--help  Print help and exit
+
+
+Note, when switching between plain and arch or parabola, you will need to
+do something like:
+ssh wrt
+cd /mnt/usb
+rm tftpboot
+ln -s <arch/parabola/debian iso dir> tftpboot
+
+
+Note: Uses GNU getopt options parsing style
 EOF
+  exit $1
 }
 
-default() {
-    cat <<'EOF'
-enable-tftp
-tftp-root=/mnt/usb/tftpboot
-dhcp-boot=pxelinux.0
+##### begin command line parsing ########
+
+dhcp=true
+redep=true
+acks=2
+wait=false
+chboot_args=()
+temp=$(getopt -l help adrSkwh "$@") || usage 1
+eval set -- "$temp"
+while true; do
+  case $1 in
+    -a) wait=true; set=false; shift ;;
+    -d) dhcp=false; shift ;;
+    -r) redep=false; shift ;;
+    -S) chboot_args+=(-S); shift ;;
+    -k) chboot_args+=(-k); shift ;;
+    -w) wait=true; set=true; shift ;;
+    -h|--help) usage ;;
+    --) shift; break ;;
+    *) echo "$0: Internal error!" ; exit 1 ;;
+  esac
+done
+
+read -r host type <<<"$@"
+
+case $# in
+  0);;
+  2)
+    case $type in
+      arch|parabola) cmd=archlike ;;
+      fai) cmd=fai ;;
+      *)
+        echo "$0: error expected type of arch|parabola|fai"
+        echo
+        usage 1
+        ;;
+    esac
+    ;;
+  *)
+    echo "$0: error: expected 0 or 2 arguments"
+    echo
+    usage 1
+    ;;
+esac
+
+
+if $wait && ! $dhcp; then
+  echo "$0: error -w conflicts with -d, choose one or other"
+  exit 1
+fi
+
+
+if [[ $host && $host != default ]]; then
+  host_tag="tag:$host,"
+fi
+
+##### end command line parsing ########
+
+e() {
+  echo "$@"
+  "$@"
+}
+
+archlike() {
+  cat <<EOF
+dhcp-option-force=209,boot/syslinux/${type}iso.cfg
+dhcp-option-force=210,/${type}/
+dhcp-boot=${host_tag}/${type}/boot/syslinux/lpxelinux.0
+EOF
+}
+
+plain() {
+  # if arch based was used before, this additionally needs
+  # the tftp link in /mnt/usb to be changed.
+  cat <<EOF
+dhcp-boot=${host_tag}pxelinux.0
 EOF
 }
 
 fai() {
-    cat <<'EOF'
-dhcp-boot=fai/pxelinux.0,faiserver.lan,faiserver.lan
+  cat <<EOF
+dhcp-boot=${host_tag}pxelinux.0,faiserver.b8.nz,faiserver.b8.nz
 EOF
 }
 
+ack-wait() {
+  wait_count=$1
+  if [[ $host ]]; then
+    host_regex=" $host"
+  fi
+  regex=".*DHCPACK.*$host_regex$"
+  i=0
+  while (( i != wait_count )) && read -r line; do
+    if [[ $line =~ $regex ]]; then
+      i=$((i+1))
+      echo $line
+    fi
+  done < <(ssh wrt logread -f)
+  e sleep 20
+}
+
+set-pxe() {
+  $dhcp || return 0
+  echo "$0: updating dnsmasq.conf:"
+  $cmd
+  ${cmd:-:}|ssh wrt "cedit pxe /etc/dnsmasq.conf || /etc/init.d/dnsmasq restart
+$([[ $type == arch || $type == parabola ]] && echo archlike-pxe-mount)"
+}
+
+
+if $set; then
+  set-pxe
+  if [[ $type == fai ]]; then
+    e myfai-chboot ${chboot_args[@]} $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
+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.
 
-$action | ssh wrt "cedit pxe-server /etc/dnsmasq.conf || /etc/init.d/dnsmasq restart
-if [[ $action == arch ]]; then arch-pxe-mount; fi"
+  # if [[ $type == fai ]]; then
+  #     echo "waiting for 1 dhcp ack then disabling fai server"
+  #     ack-wait 1
+  #     faiserver-disable
+  # fi
+fi