iankelling.org Git - distro-setup/blob - switch-primary-host

   1 #!/bin/bash
   2
   3 source /a/bin/errhandle/errcatch-function
   4 source /a/bin/errhandle/bash-trace-function
   5 errcatch
   6
   7 cd /
   8
   9 old=$1
  10 new=$HOSTNAME
  11
  12 if [[ ! $old ]]; then
  13     echo "$0: error: no \$1 given, should be old host"
  14     exit 1
  15 fi
  16
  17 if ! timeout -s 9 2 ssh $old : ; then
  18     echo "$0: error: can't ssh to $old"
  19 fi
  20
  21 for p in emacs firefox pidgin; do
  22     ssh $old killall $p ||:
  23 done
  24
  25 # note: duplicated in check-subvol-stale
  26 last_a=$(
  27     vol=a
  28     for s in /mnt/root/btrbk/$vol.*; do
  29         f=${s##*/}
  30         unix_time=$(date -d $(sed -r  's/(.{4})(..)(.{5})(..)(.*)/\1-\2-\3:\4:\5/' <<<${f#$vol.}) +%s)
  31         printf "%s\n" $unix_time
  32     done | sort -r | head -n 1
  33       )
  34
  35 if [[ $last_a != [0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9] ]]; then
  36     echo "$0: error: last_a bad value: $last_a"
  37     exit 1
  38 fi
  39
  40 # if last_a is recent enough, skip doing btrbk
  41 if  (( last_a < $(date +%s) - 60*60 )); then
  42     if ! ssh $old btrbk-run -pvt $new; then
  43         echo "$0: error: failed btrbk-run"
  44         exit 1
  45     fi
  46 fi
  47
  48 switch-mail-host $old $new