X-Git-Url: https://iankelling.org/git/?p=automated-distro-installer;a=blobdiff_plain;f=pxe-server;h=6137386a1188d9ab9c50e4bee783e7ee57dfc053;hp=3abb1bac0876916751ef25604c2205a25bb47602;hb=HEAD;hpb=ef0a70393a38632614fa6382f52546b1177b9f28

diff --git a/pxe-server b/pxe-server
index 3abb1ba..1e99b03 100755
--- a/pxe-server
+++ b/pxe-server
@@ -16,32 +16,44 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 
+[[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
 
-x="$(readlink -f "$BASH_SOURCE")"; source "${x%/*}/bash-trace"
+readonly this_file="$(readlink -f -- "${BASH_SOURCE[0]}")"
+script_dir="${this_file%/*}"
+# shellcheck source=./bash-trace
+source "${script_dir}/bash-trace"
+cd $script_dir
+PATH="$PATH:$PWD"
 
 
 usage() {
   cat <<EOF
-Usage: ${0##*/} [OPTIONS] [HOST TYPE]
-Configure dnsmasq boot options and fai-chboot if appropriate.
+Usage: ${0##*/} [OPTIONS] [HOST] [TYPE]
+Configure dnsmasq boot options and fai-chboot if appropriate. This is
+not general purpose, it has code specific to dhcp servers I run.
 
-Without HOST TYPE, disable  server and fai server.
+Without TYPE, disable  server and fai server. In that case, HOST is only
+needed for fsf office network.
 
-HOST       A hostname known to the dhcp server, or default for all.
-TYPE       One of arch, parabola, plain, fai.
+HOST       Only do dhcp pxe for HOST. The hostname must be known to the dhcp
+           server to target its mac. Use "default" for all hosts.
+           Required in fsf office environment.
 
--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.
+TYPE       One of arch, parabola, plain, fai.
 
 -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.
+-d         Don't alter dhcp config. Only make sense for fai type, and on network
+           other than home or fsf, when using fai-cd, or pxe-kexec.
 -k         Pass -k to myfai-chboot.
+--no-r     Pass --no-r to myfai-chboot.
+-r         Don't redeploy fai config. For example, if there is a different host
+           that is mid-install.
+
+-S         sets FAI_ACTION=sysinfo, see myfai-chboot for more info.
 -w         Setup pxe, then wait like -a.
 -h|--help  Print help and exit
 
@@ -54,27 +66,56 @@ rm tftpboot
 ln -s <arch/parabola/debian iso dir> tftpboot
 
 
+Notes on debugging pxe dhcp tftp:
+
+For debugging dhcp, add to /etc/dnsmasq.conf: log-dhcp
+
+Newer openwrt runs dnsmasq with a whitelist of readable files and dirs:
+
+ps ww :
+/sbin/ujail -t 5 -n dnsmasq -u -l -r /bin/ubus -r /etc/TZ -r /etc/dnsmasq.conf -r /etc/ethers -r /etc/group -r /etc/hosts -r /etc/passwd -w /tmp/dhcp.leases -r /tmp/dnsmasq.d -r /tmp/hosts -r /tmp/resolv.conf.d -r /usr/bin/jshn -r /usr/lib/dnsmasq/dhcp-script.sh -r /usr/share/dnsmasq/dhcpbogushostname.conf -r /usr/share/dnsmasq/rfc6761.conf -r /usr/share/dnsmasq/trust-anchors.conf -r /usr/share/libubox/jshn.sh -r /var/etc/dnsmasq.conf.cfg01411c -w /var/run/dnsmasq/ -- /usr/sbin/dnsmasq -C /var/etc/dnsmasq.conf.cfg01411c -k -x /var/run/dnsmasq/dnsmasq.cfg01411c.pid
+
+logging tftp requests:
+/etc/default/tftpd-hpa:
+add -vv:
+TFTP_OPTIONS="--secure -vv"
+jr -u tftpd-hpa -f
+
 Note: Uses GNU getopt options parsing style
 EOF
   exit $1
 }
 
+pre="${0##*/}:"
+m() { printf "$pre %s\n"  "$*"; "$@"; }
+e() { printf "$pre %s\n"  "$*"; }
+err() { echo "[$(date +'%Y-%m-%d %H:%M:%S%z')]: $pre: $*" >&2; }
+
+PATH="/a/exe:$PATH"
+
 ##### begin command line parsing ########
 
 dhcp=true
 redep=true
 acks=2
 wait=false
+fsf_office=false
+
+case $HOSTNAME in
+  x3|kw) fsf_office=true ;;
+esac
+
 chboot_args=()
-temp=$(getopt -l help adrSkwh "$@") || usage 1
+temp=$(getopt -l no-r,help adkrSwh "$@") || usage 1
 eval set -- "$temp"
 while true; do
   case $1 in
     -a) wait=true; set=false; shift ;;
     -d) dhcp=false; shift ;;
+    -k) chboot_args+=(-k); shift ;;
+    --no-r) chboot_args+=(--no-r); shift ;;
     -r) redep=false; shift ;;
     -S) chboot_args+=(-S); shift ;;
-    -k) chboot_args+=(-k); shift ;;
     -w) wait=true; set=true; shift ;;
     -h|--help) usage ;;
     --) shift; break ;;
@@ -85,7 +126,7 @@ done
 read -r host type <<<"$@"
 
 case $# in
-  0);;
+  [01]);;
   2)
     case $type in
       arch|parabola) cmd=archlike ;;
@@ -98,7 +139,7 @@ case $# in
     esac
     ;;
   *)
-    echo "$0: error: expected 0 or 2 arguments"
+    echo "$0: error: expected 0-2 arguments"
     echo
     usage 1
     ;;
@@ -106,10 +147,14 @@ esac
 
 
 if $wait && ! $dhcp; then
-  echo "$0: error -w conflicts with -d, choose one or other"
+  echo "$0: error -w conflicts with -d, choose one or other" >&2
   exit 1
 fi
 
+if $fsf_office && [[ ! $host ]]; then
+  echo "$0: at fsf_office, provide HOST arg" >&2
+  exit 1
+  fi
 
 if [[ $host && $host != default ]]; then
   host_tag="tag:$host,"
@@ -117,16 +162,11 @@ 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
+${host_tag}209,boot/syslinux/${type}iso.cfg
+${host_tag}210,/${type}/
+${host_tag}option:bootfile-name,/${type}/boot/syslinux/lpxelinux.0
 EOF
 }
 
@@ -134,52 +174,91 @@ plain() {
   # if arch based was used before, this additionally needs
   # the tftp link in /mnt/usb to be changed.
   cat <<EOF
-dhcp-boot=${host_tag}pxelinux.0
+${host_tag}option:bootfile-name,pxelinux.0
 EOF
 }
 
 fai() {
   cat <<EOF
-dhcp-boot=${host_tag}pxelinux.0,faiserver.b8.nz,faiserver.b8.nz
+${host_tag}option:bootfile-name,pxelinux.0
+${host_tag}option:server-ip-address,$faiserverip
+${host_tag}option:tftp-server,$faiserverip
 EOF
+  # Note, previously used normal dnsmasq option, but it requires dnsmasq
+  # restart, which causes momentary dns failures, which can bork an
+  # install.
+  #
+  # dhcp-boot=${host_tag}pxelinux.0,faiserver.b8.nz,faiserver.b8.nz
 }
 
 ack-wait() {
+  if $fsf_office; then
+    wait_cmd="ssh tarantula.office.fsf.org tail -n0 -f /var/log/syslog"
+  else
+    wait_cmd="ssh cmc logread -f"
+  fi
   wait_count=$1
   if [[ $host ]]; then
-    host_regex=" $host"
+    if $fsf_office; then
+      host_regex=" $(getent hosts kw | awk '{print $1}' | sed 's/\./\\./g')"
+    else
+      host_regex=" $host"
+    fi
   fi
-  regex=".*DHCPACK.*$host_regex$"
+  regex=".*DHCPACK.*$host_regex\b"
   i=0
   while (( i != wait_count )) && read -r line; do
     if [[ $line =~ $regex ]]; then
       i=$((i+1))
       echo $line
     fi
-  done < <(ssh wrt logread -f)
-  e sleep 20
+  done < <($wait_cmd ||:) # tail returns 2 it seems
+  m 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
+  if $fsf_office; then
+    if [[ ! $cmd ]]; then
+      e "removing pxe for $host on tarantula"
+      ssh tarantula.office.fsf.org bash -e <<EOF
+sed -ri 's/^( *host +$host *\{).*/\1/' /etc/dhcp/dhcpd.conf
+systemctl restart isc-dhcp-server
+EOF
+    elif [[ $cmd == fai ]]; then
+      e "adding pxe for $host on tarantula"
+      ssh tarantula.office.fsf.org bash -e <<EOF
+sed -ri 's/^( *host +$host *\{).*/\1 next-server faiserver.office.fsf.org; filename "pxelinux.0";/' /etc/dhcp/dhcpd.conf
+systemctl restart isc-dhcp-server
+EOF
+    fi
+  else
+    e "updating dnsmasq.conf:"
+    m $cmd
+    ${cmd:-:}|ssh cmc "dd of=/var/run/dnsmasq/dhcpopts.conf; /etc/init.d/dnsmasq reload
 $([[ $type == arch || $type == parabola ]] && echo archlike-pxe-mount)"
+  fi
 }
 
+type -t host &>/dev/null || sudo apt-get -y install dnsutils
+faiserverip=$(host faiserver | sed -rn 's/^\S+ has address //p;T;q' ||:)
+if [[ ! $faiserverip || $faiserverip =~ [[:space:]] ]]; then
+  echo "$0: error: failed to get \$faiserverip, got: $faiserverip"
+  exit 1
+fi
+
 
 if $set; then
   set-pxe
   if [[ $type == fai ]]; then
-    e myfai-chboot ${chboot_args[@]} $host
     if $redep; then
-      e fai-redep
+      m fai-redep
     fi
+    m myfai-chboot ${chboot_args[@]} $host
   else
     # This will fail if faiserver is not setup, so ignore any
     # failure and don't bother us about it.
-    myfai-chboot &>/dev/null ||:
+    m myfai-chboot &>/dev/null ||:
   fi
 fi