X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;f=pxe-server;h=8b3399ea806f6147cb6608bfdcb5fd8305bf6c0d;hb=d29d21017de635db1d05769144db56f44addd055;hp=5507e5d1196ba6b219916f2774be16b3d4759dd1;hpb=5177fb7a211b9056ad8f0df41371bbeaac25ed32;p=automated-distro-installer

diff --git a/pxe-server b/pxe-server
index 5507e5d..8b3399e 100755
--- a/pxe-server
+++ b/pxe-server
@@ -1,4 +1,19 @@
 #!/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.
@@ -7,61 +22,84 @@
 # 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 $?" >&2' ERR
+
+x="$(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 pxe server options and fai-chboot if appropriate.
+
+Without HOST TYPE, disable pxe server and fai server.
+
+HOST       A hostname known to the dhcp server, or default for all.
+TYPE       One of arch, plain, fai.
 
-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. 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         Pass -S to fai-chboot.
+-w         Setup pxe, then wait like -a.
 -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=()
 redep=true
-while [[ $1 ]]; do
+acks=2
+wait=false
+temp=$(getopt -l help harSw "$@") || usage 1
+eval set -- "$temp"
+while true; do
     case $1 in
-        --) shift; break ;;
-        -h|--help) usage ;;
+        -a) wait=true; set=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[@]}"
-
-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
+if [[ $host && $host != default ]]; then
     host_tag="tag:$host,"
 fi
 
-case $type in
-    :|true) persist=true ;;
-esac
-
 ##### end command line parsing ########
 
-sv() {
+e() {
     echo "$@"
     "$@"
 }
@@ -84,8 +122,7 @@ 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
 }
 
@@ -96,42 +133,53 @@ ack-wait() {
     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"
+    ${type:-:}|ssh wrt "cedit pxe /etc/dnsmasq.conf || /etc/init.d/dnsmasq restart
+$([[ $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
+if $wait; then
     # fai's debian jessie 8.5ish does 2 dhcp requests when booting,
     # roughly 4 seconds apart. Earlier
-    # versions did just 1. Whatever.
-    echo "waiting for 3 dhcp acks then disabling pxe"
-    ack-wait 3
-    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
+    # 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