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 #set -x
   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 if ! dmidecode -t system | grep -F "Version: ThinkPad X200" &>/dev/null; then
  63   echo "not x200, exiting"
  64   exit 0
  65 fi
  66
  67 first=true
  68 for dev in $(btrfs fi show / | sed -rn 's#^\s*devid\s.*\s([^0-9 ]+)\S+$#\1#p' \
  69                |sort); do
  70   echo dev=$dev
  71   found=false
  72   # Decide which is my grub_ext partition. see partition.DEFAULT file
  73   # for details. currently it is 4
  74   for (( i=4; i<=7; i++ )); do
  75     if [[ $(blockdev --getsize64 ${dev}$i) == 8388608 ]]; then
  76       grub_extn=${dev}$i
  77       found=true
  78       echo grub_extn=$grub_extn
  79       break
  80     fi
  81   done
  82   if ! $found; then
  83     echo "$0: error: failed to find grub_ext partition."
  84     exit 1
  85   fi
  86   m mount $grub_extn /mnt
  87   if $first; then
  88     if [[ -e /mnt/grubenv ]]; then
  89       m grub-editenv /mnt/grubenv list
  90       source <(grub-editenv /mnt/grubenv list)
  91     fi
  92     first=false
  93     # we could just as well check if last_boot != /debianbullseye_bootstrap
  94     # the intent with this one is just a little clearer.
  95     if [[ $did_fai_check == true ]]; then
  96       m grub-editenv /mnt/grubenv set did_fai_check=os_true
  97       # our service does not wait for network-online.target,
  98       # because it will wait for too long when we don't have a network
  99       # connection. So, we wait for 10 seconds.
 100       # ref: https://www.freedesktop.org/wiki/Software/systemd/NetworkTarget/
 101       try-kexec ||:
 102     fi
 103   else
 104     # we make sure there is only 1 grubenv,
 105     # so grub can just find the first one, in whatever order
 106     # if looks at them, which may not be the same as us.
 107     # If the disk dies, we just lose the default boot option,
 108     # we will have to do manual steps to replace it anyways.
 109     m rm -f /mnt/gruvenv
 110   fi
 111   m umount /mnt
 112 done
 113
 114 # the check for last_boot is not needed afaik, just sanity check.
 115 case $did_fai_check in
 116   true|os_true)
 117     if [[ $last_boot != /debianbullseye_bootstrap ]]; then
 118       # no need to reboot if we actually want to boot into this os.
 119       echo "last_boot not debianbullseye_bootstrap, rebooting"
 120       reboot
 121     fi
 122 esac