X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;f=pxe-server;h=e59854a85e466be75cbad22733ded83cae6c077e;hb=a030c6b0d89340212d3c04023dcd1fe2a52d31d1;hp=4fcf40c134cd472d3ba50aaa26687298846c5da1;hpb=cbdfb4aeffe56f5a1f00a006e94d328653957770;p=automated-distro-installer

diff --git a/pxe-server b/pxe-server
index 4fcf40c..e59854a 100755
--- a/pxe-server
+++ b/pxe-server
@@ -1,4 +1,19 @@
-#!/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.
@@ -13,38 +28,66 @@ trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
 
 usage() {
     cat <<EOF
-Usage: ${0##*/} [OPTIONS] TYPE [HOST]
-One line description
+Usage: ${0##*/} [OPTIONS] [HOST TYPE]
+Configure dnsmasq pxe server options and fai-chboot if appropriate.
+
+
+Without HOST TYPE, disable pxe server and fai server.
+TYPE is one of arch, plain, fai.
+HOST is a hostname known to the dhcp server, or default for all
+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
+
+
+-r         Don't redeploy fai config. For example, if there is a different host
+           that is mid-install.
+-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
 
-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
+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 host type <<<"$@"
 
-read type host <<<"${args[@]}"
-
-if [[ ! $type ]]; then
-    echo "$0: error: exptected 1 argument of type"
-    usage 1
-fi
+case $# in
+    0|2);;
+    *)
+        echo "$0: error: expected 0 or 2 arguments"
+        echo
+        usage 1
+        ;;
+esac
 
 if [[ $host ]]; then
     host_tag="tag:$host,"
@@ -52,8 +95,12 @@ fi
 
 ##### end command line parsing ########
 
+e() {
+    echo "$@"
+    "$@"
+}
+
 arch() {
-    plain
     cat <<EOF
 dhcp-option-force=209,boot/syslinux/archiso.cfg
 dhcp-option-force=210,/arch/
@@ -65,8 +112,6 @@ 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=${host_tag}pxelinux.0
 EOF
 }
@@ -74,10 +119,63 @@ 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
+}
+
+set-pxe() {
+    ${type:-:}|ssh wrt "cedit pxe /etc/dnsmasq.conf || /etc/init.d/dnsmasq restart
+$([[ $type == arch ]] && echo arch-pxe-mount)"
+}
 
-$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
+        e myfai-chboot $host
+        if $redep; then
+            e fai-redep
+        fi
+    else
+        e myfai-chboot
+    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.
+
+    # if [[ $type == fai ]]; then
+    #     echo "waiting for 1 dhcp ack then disabling fai server"
+    #     ack-wait 1
+    #     faiserver-disable
+    # fi
+fi