iankelling.org Git - automated-distro-installer/blob - fai/config/files/root/fai-check/VOL_BUSTER_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]
  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 case $1 in
  44   -f|--force)
  45     try-kexec
  46     exit
  47     ;;
  48 esac
  49
  50
  51 first=true
  52 for dev in $(btrfs fi show / | sed -rn 's#^\s*devid\s.*\s([^0-9 ]+)\S+$#\1#p' \
  53                |sort); do
  54
  55   if [[ $(blockdev --getsize64 ${boot_disk}4) == 8388608 ]]; then
  56     # old partition scheme
  57     dev+=4
  58   else
  59     dev+=5
  60   fi
  61   mount $dev /mnt
  62   if $first; then
  63     if [[ -e /mnt/grubenv ]]; then
  64       set -x
  65       source <(grub-editenv /mnt/grubenv list)
  66       set +x
  67     fi
  68     first=false
  69     # we could just as well check if last_boot != /debianbuster_boostrap
  70     # the intent with this one is just a little clearer.
  71     if [[ $did_fai_check == true ]]; then
  72       grub-editenv /mnt/grubenv set did_fai_check=os_true
  73       # our service does not wait for network-online.target,
  74       # because it will wait for too long when we don't have a network
  75       # connection. So, we wait for 10 seconds.
  76       # ref: https://www.freedesktop.org/wiki/Software/systemd/NetworkTarget/
  77       try-kexec ||:
  78     fi
  79   else
  80     # we make sure there is only 1 grubenv,
  81     # so grub can just find the first one, in whatever order
  82     # if looks at them, which may not be the same as us.
  83     # If the disk dies, we just lose the default boot option,
  84     # we will have to do manual steps to replace it anyways.
  85     rm -f /mnt/gruvenv
  86   fi
  87   umount /mnt
  88 done
  89
  90 # the check for last_boot is not needed afaik, just sanity check.
  91 if [[ $did_fai_check == true && $last_boot != /debianbuster_boostrap ]]; then
  92   # no need to reboot if we actually want to boot into this os.
  93   reboot
  94 fi