X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;f=pxe-server;h=5507e5d1196ba6b219916f2774be16b3d4759dd1;hb=5177fb7a211b9056ad8f0df41371bbeaac25ed32;hp=1664253761ae818d846d07521291214a0a42f64b;hpb=a8ec695d6a39792133a21e9eca70e69f9fab107b;p=automated-distro-installer

diff --git a/pxe-server b/pxe-server
index 1664253..5507e5d 100755
--- a/pxe-server
+++ b/pxe-server
@@ -1,44 +1,137 @@
-#!/bin/bash -x
+#!/bin/bash
 
 # Setup dhcp server to point to tftp server,
 # and depending on the type, setup the tftp server.
 
 # usage: $0 TYPE
-# default distro is the base debian/fedora type. others are fai &  arch
+# 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
 
-if [[ ! $1 ]]; then
+
+usage() {
+    cat <<EOF
+Usage: ${0##*/} [OPTIONS] TYPE [HOST]
+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
+
+-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.
+EOF
+    exit $1
+}
+
+##### begin command line parsing ########
+
+persist=false
+args=()
+redep=true
+while [[ $1 ]]; do
+    case $1 in
+        --) shift; break ;;
+        -h|--help) usage ;;
+        -r) redep=false; shift ;;
+        -p) persist=true; shift ;;
+        *) args+=("$1"); shift ;;
+    esac
+done
+args+=("$@")
+
+
+read type host <<<"${args[@]}"
+
+if [[ ! $type ]]; then
     echo "$0: error: exptected 1 argument of type"
+    usage 1
+fi
+
+if [[ $host ]]; then
+    host_tag="tag:$host,"
 fi
-action=$1
+
+case $type in
+    :|true) persist=true ;;
+esac
+
+##### end command line parsing ########
+
+sv() {
+    echo "$@"
+    "$@"
+}
 
 arch() {
-    default
-    cat <<'EOF'
+    cat <<EOF
 dhcp-option-force=209,boot/syslinux/archiso.cfg
 dhcp-option-force=210,/arch/
-dhcp-boot=/arch/boot/syslinux/lpxelinux.0
+dhcp-boot=${host_tag}/arch/boot/syslinux/lpxelinux.0
 EOF
 }
 
-plain-tftp() {
+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=pxelinux.0
+    cat <<EOF
+dhcp-boot=${host_tag}pxelinux.0
 EOF
 }
 
 fai() {
-    cat <<'EOF'
-dhcp-boot=fai/pxelinux.0,faiserver.lan,faiserver.lan
+    cat <<EOF
+$set_host_tag
+dhcp-boot=${host_tag}fai/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)
+    sv sleep 5
+}
 
-$action | ssh wrt "cedit pxe-server /etc/dnsmasq.conf || /etc/init.d/dnsmasq restart
-if [[ $action == arch ]]; then arch-pxe-mount; fi"
+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"
+}
+
+set-pxe
+
+if [[ $type == fai ]]; then
+    if $redep; then
+        fai-redep
+    fi
+    faiserver-enable
+fi
+
+if ! $persist; 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
+fi