X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;f=pxe-server;h=9c3f917fcaceee7a488453759aa6eed44b528250;hb=43480add5b3ab6f4e407065454bd6be1d1fe1870;hp=574a896f05ea3e19bb73590655f5b8e816772252;hpb=c8bd51084bc4d90b9653d521e7cb05e17e417d97;p=automated-distro-installer

diff --git a/pxe-server b/pxe-server
index 574a896..9c3f917 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.
@@ -13,54 +28,65 @@ trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
 
 usage() {
     cat <<EOF
-Usage: ${0##*/} [OPTIONS] TYPE [HOST]
+Usage: ${0##*/} [OPTIONS] [HOST TYPE]
 One line description
 
-TYPE is one of arch, plain, fai, or : for no pxe server.
-HOST makes the pxe server only for that specific host
-
+TYPE is one of arch, plain, fai.
+HOST is a hostname known to the dhcp server, or default for all, or none to disable
+
+-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
---         Subsequent arguments are never treated as options
--p         Persist. Otherwise, wait for 2 dhcp acks then remove.
+
+
+Note: Uses GNU getopt options parsing style
 EOF
     exit $1
 }
 
 ##### begin command line parsing ########
 
-persist=false
 args=()
-redep=false
-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 ;;
-        -r) redep=true; shift ;;
-        -p) persist=true; shift ;;
-        *) args+=("$1"); shift ;;
+        --) shift; break ;;
+        *) echo "$0: Internal error!" ; exit 1 ;;
     esac
 done
-args+=("$@")
-
 
-read type host <<<"${args[@]}"
+read host type <<<"$@"
 
-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,"
 fi
 
-case $type in
-    :|true) persist=true ;;
-esac
-
 ##### end command line parsing ########
 
-sv() {
+e() {
     echo "$@"
     "$@"
 }
@@ -84,32 +110,63 @@ 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
 }
 
-echo "setting config type: $type"
-$type | ssh wrt "cedit pxe-server /etc/dnsmasq.conf || /etc/init.d/dnsmasq restart #
-if [[ $type == arch ]]; then arch-pxe-mount; fi"
-
-
-if $redep && [[ $type == fai ]]; then
-    fai-redep
-fi
-if ! $persist; then
-    echo "waiting for 2 dhcp acks then disabling pxe"
+ack-wait() {
+    wait_count=$1
     if [[ $host ]]; then
         host_regex=" $host"
     fi
     regex=".*DHCPACK.*$host_regex$"
     i=0
     tmp=$(mktemp)
-    while (( i != 2 )) && read line; do
+    while (( i != wait_count )) && read line; do
         if [[ $line =~ $regex ]]; then
             i=$((i+1))
             echo $line
         fi
     done < <(ssh wrt logread -f)
-    sv sleep 5
-    sv "$BASH_SOURCE" :
+    e sleep 20
+}
+
+set-pxe() {
+    ${type:-:}|ssh wrt "cedit pxe /etc/dnsmasq.conf || /etc/init.d/dnsmasq restart
+$([[ $type == arch ]] && echo arch-pxe-mount)"
+}
+
+
+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