iankelling.org Git - automated-distro-installer/blob - fai/config/files/root/fai-check/VOL_BULLSEYE_BOOTSTRAP

   1 #!/bin/bash
   2
   3 set -eE -o pipefail
   4 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
   5
   6
   7
   8 usage() {
   9   cat <<EOF
  10 Usage: ${0##*/} [OPTION] [HOST]
  11 If grub var set, act like pxe rom and pxe-kexec to faiserver
  12
  13 -f|--force  do kexec if we can reach faiserver
  14 -h|--help  Print help and exit.
  15
  16 Note: Uses GNU getopt options parsing style
  17 EOF
  18   exit $1
  19 }
  20
  21
  22
  23 # Keep it short so we don't delay too much wnen we don't have networking.
  24 # In practice, on my home network, on an x200, it took 15 seconds, so
  25 # give it an extra 10 seconds, which seems fairly short as I write this.
  26 NETWORK_TIMOUT_SECS=25
  27 did_fai_check=false
  28
  29 m() { printf "%s\n" "$*";  "$@"; }
  30
  31 try-kexec() {
  32   deadline=$(( `date +%s` + NETWORK_TIMOUT_SECS ))
  33   while ! timeout -s 9 3 nc -zu $faiserver 69; do
  34     if (( `date +%s` > deadline )); then
  35       echo "fai-check: hit $NETWORK_TIMOUT_SECS s tftp server timeout"
  36       return 0
  37     fi
  38     sleep 1
  39   done
  40   m pxe-kexec -n --ignore-whitelist -l fai-generated $faiserver ||:
  41 }
  42
  43 force=false
  44 case $1 in
  45   -h|--help)
  46     usage
  47     ;;
  48   -f|--force)
  49     force=true
  50     shift
  51     ;;
  52 esac
  53
  54 faiserver=${1:-faiserver.b8.nz}
  55
  56
  57 if $force; then
  58   try-kexec
  59   exit
  60 fi
  61
  62 first=true
  63 for dev in $(btrfs fi show / | sed -rn 's#^\s*devid\s.*\s([^0-9 ]+)\S+$#\1#p' \
  64                |sort); do
  65
  66   found=false
  67   # Decide which is my grub_ext partition. see partition.DEFAULT file
  68   # for details. currently it is 4
  69   for (( i=4; i<=7; i++ )); do
  70     if [[ $(blockdev --getsize64 ${dev}$i) == 8388608 ]]; then
  71       grub_extn=${dev}$i
  72       found=true
  73       break
  74     fi
  75   done
  76   if ! $found; then
  77     echo "$0: error: failed to find grub_ext partition."
  78     exit 1
  79   fi
  80   mount $grub_extn /mnt
  81   if $first; then
  82     if [[ -e /mnt/grubenv ]]; then
  83       set -x
  84       source <(grub-editenv /mnt/grubenv list)
  85       set +x
  86     fi
  87     first=false
  88     # we could just as well check if last_boot != /debianbullseye_bootstrap
  89     # the intent with this one is just a little clearer.
  90     if [[ $did_fai_check == true ]]; then
  91       grub-editenv /mnt/grubenv set did_fai_check=os_true
  92       # our service does not wait for network-online.target,
  93       # because it will wait for too long when we don't have a network
  94       # connection. So, we wait for 10 seconds.
  95       # ref: https://www.freedesktop.org/wiki/Software/systemd/NetworkTarget/
  96       try-kexec ||:
  97     fi
  98   else
  99     # we make sure there is only 1 grubenv,
 100     # so grub can just find the first one, in whatever order
 101     # if looks at them, which may not be the same as us.
 102     # If the disk dies, we just lose the default boot option,
 103     # we will have to do manual steps to replace it anyways.
 104     rm -f /mnt/gruvenv
 105   fi
 106   umount /mnt
 107 done
 108
 109 # the check for last_boot is not needed afaik, just sanity check.
 110 if [[ $did_fai_check == true && $last_boot != /debianbullseye_bootstrap ]]; then
 111   # no need to reboot if we actually want to boot into this os.
 112   reboot
 113 fi