usage() {
cat <<EOF
-Usage: ${0##*/} [OPTIONS] push|pull HOST
+Usage: switch-mail-host|switch-host2 [OPTIONS] push|pull HOST
Turn off mail receiving on OLD_HOST, run btrbk to move mail to NEW_HOST,
turn on mail receiving on NEW_HOST. Assumes we want to move all
-i Disallow incremental backup.
-o Only btrbk /o, instead of all filesystems.
+--force Run even though our local state does not say that MAIL_HOST is
+ us when pushing or HOST when pulling.
-h|--help Print help and exit.
I used to adjust home network dns so NEW_HOST resolves locally if it is
exit $1
}
+script_name="${BASH_SOURCE[0]}"
+script_name="${script_name##*/}"
restore_new_btrbk=false
restore_old_btrbk=false
fi
}
-pre="${0##*/}:"
+pre="${SSH_CLIENT:+$HOSTNAME} $script_name:"
m() { printf "$pre %s\n" "$*"; "$@"; }
e() { printf "$pre %s\n" "$*"; }
err() { echo "$pre ERROR: $*" >&2; }
##### begin command line parsing ########
+mail_only=false
+host2_only=false
force=false
mp_args="-m /o,/q,/a"
temp=$(getopt -l force,help ioh "$@") || usage 1
case $1 in
--force) force=true ;;
-i) incremental_arg="-i" ;;
- -o) mp_args="-m /o" ;;
+ -o)
+ mail_only=true ;;
-h|--help) usage ;;
--) shift; break ;;
*) echo "$0: Internal error! unexpected args: $*" ; exit 1 ;;
exit 1
fi
-case $1 in
+source /a/bin/bash_unpublished/source-state
+
+direction=$1
+host=$2
+case $direction in
push)
old_host=$HOSTNAME
old_hostname=$HOSTNAME
- new_host=$2
+ new_host=$host
bbk_args="-t $new_host"
new_shell="ssh -F $HOME/.ssh/confighome root@$new_host"
- $new_shell -v hostname
- new_hostname=$($new_shell hostname)
+ if ! new_hostname=$($new_shell hostname); then
+ echo "$pre: error: failed ssh. retrying failed $new_shell with -v for more info:"
+ $new_shell -v hostname
+ fi
;;
pull)
- old_host=$2
+ old_host=$host
new_host=$HOSTNAME
new_hostname=$HOSTNAME
bbk_args="-s $old_host"
old_shell="ssh -F $HOME/.ssh/confighome root@$old_host"
- # tests ssh connection
- if ! old_hostname=$($old_shell hostname); then
- echo "retrying failed $old_shell with -v"
+ old_shelliank="ssh -F $HOME/.ssh/confighome iank@$old_host"
+ # tests ssh connection. crafted this to not need to do escape chars
+ f=/a/bin/bash_unpublished/source-state
+ if ! old_info=($($old_shell "hostname; sed -n s,.*MAIL_HOST=,,p $f; sed -n s,.*HOST2=,,p $f")); then
+ echo "$pre: error: failed ssh. retrying failed $old_shell with -v for more info:"
$old_shell -v hostname
exit 1
fi
+ old_hostname=${old_info[0]}
+ MAIL_HOST=${old_info[1]}
+ HOST2=${old_info[2]}
;;
*)
err invalid first argument
;;
esac
-source /a/bin/bash_unpublished/source-state
+case $script_name in
+ switch-mail-host)
+ if [[ $MAIL_HOST != "$HOST2" ]]; then
+ mail_only=true
+ fi
+ ;;
+ switch-host2)
+ host2_only=true
+ ;;
+ *)
+ err unexpected script name
+ ;;
+esac
+
+if $mail_only; then
+ mp_args="-m /o"
+elif $host2_only; then
+ mp_args="-m /a,/ar,/q,/qr"
+fi
-if [[ $old_hostname != "$MAIL_HOST" ]] && ! $force; then
+
+if $host2_only; then
+ if [[ $old_hostname != "$HOST2" ]]; then
+ err "\$old_hostname($old_hostname) != \$HOST2($HOST2). Rerun with --force if you really want this."
+ exit 1
+ fi
+elif [[ $old_hostname != "$MAIL_HOST" ]] && ! $force; then
err "\$old_hostname($old_hostname) != \$MAIL_HOST($MAIL_HOST). Rerun with --force if you really want this."
exit 1
fi
done
# ensure these are unused before doing anything
-
e "On $new_host: umounting /m and /o, checking emacs"
-$new_shell bash -s <<'EOF'
+{
+ cat <<'EOF'
set -eE
-if pgrep -f 'emacs --daemon' &>/dev/null; then
- bufs="$(emacsclient --eval "$(cat /a/bin/ds/unsaved-buffers.el)"| sed '/^"nil"$/d;s/^"(/E: /;s/)"$//')"
+if pgrep -G iank -u iank -f 'emacs --daemon' &>/dev/null; then
+ bufs="$(sudo -u iank env XDG_RUNTIME_DIR=/run/user/1000 emacsclient --eval "$(cat /a/bin/ds/unsaved-buffers.el)"| sed '/^"nil"$/d;s/^"(/E: /;s/)"$//')"
if [[ $bufs ]]; then
echo "error: on $HOSTNAME, unsaved emacs files: $bufs" >&2
exit 1
fi
fi
+EOF
+ if ! $host2_only; then
+ cat <<EOF
for dir in m o; do
- if mountpoint -q /$dir; then
- echo On $new_host: umount /$dir
- umount /$dir
+ if mountpoint -q /\$dir; then
+ echo On $new_host: umount /\$dir
+ umount /\$dir
fi
done
EOF
+ fi
+} | $new_shell bash -s
$old_shell bash -s <<'EOF'
-if pgrep -f 'emacs --daemon' &>/dev/null; then
- bufs="$(emacsclient --eval "$(cat /a/bin/ds/unsaved-buffers.el)"| sed '/^"nil"$/d;s/^"(/E: /;s/)"$//')"
+if pgrep -G iank -u iank -f 'emacs --daemon' &>/dev/null; then
+ bufs="$(sudo -u iank env XDG_RUNTIME_DIR=/run/user/1000 emacsclient --eval "$(cat /a/bin/ds/unsaved-buffers.el)"| sed '/^"nil"$/d;s/^"(/E: /;s/)"$//')"
if [[ $bufs ]]; then
echo "error: on $HOSTNAME, unsaved emacs files: $bufs" >&2
exit 1
exit $ret
fi
+if ! $mail_only; then
+ m $old_shell sed -ri "s/HOST2=.*/HOST2=$new_hostname/" /a/bin/bash_unpublished/source-state
+ m $new_shell sed -ri "s/HOST2=.*/HOST2=$new_hostname/" /a/bin/bash_unpublished/source-state
+fi
+
+if $host2_only; then
+ if [[ $old_hostname != "$MAIL_HOST" && $old_hostname != kd ]]; then
+ m $old_shell systemctl --now disable btrbk.timer
+ fi
+ m $new_shell systemctl --now enable btrbk.timer
+ exit 0
+fi
+
if ! m $old_shell /a/exe/primary-setup $new_hostname; then
ret=$?
- err "failed \$old_shell primary-setup \$new_hostname. fix and rerun switch-mail-host"
+ err "failed \$old_shell primary-setup \$new_hostname. fix and rerun $script_name"
exit $ret
fi
m $new_shell killall -q emacs ||:
e Running main btrbk
-m btrbk-run -v $bbk_args $incremental_arg -m /o || ret=$?
+m btrbk-run -v --fast $bbk_args $incremental_arg -m /o || ret=$?
if (( ret )); then
bang="$(printf "$(tput setaf 5)█$(tput sgr0)%.0s" 1 2 3 4 5 6 7)"
e $bang failed btrbk of /o. restoring old host as primary
exit $ret
fi
+# new system is usable at this point
+printf "$(tput setaf 5 2>/dev/null ||:)█$(tput sgr0 2>/dev/null||:)%.0s" $(eval echo "{1..${COLUMNS:-60}}")
+echo
+
# once I accidentally accepted incoming mail on old host. I used this script to copy over that mail:
#
# die=false; for d in o.leaf.2021-05-29T10:02:08-0400/m/{4e,md,4e2}/{,l/}!(*myarchive)/new; do if $die; then break; fi; find $d -type f -mtime -5 | while read -r f; do dir="${f%new/*}"; dir="btrbk/o.20210530T000011-0400/${dir#*/}"; fname="${f##*/}"; [[ -e $dir/new/$fname || -e $dir/cur/$fname ]] && continue; if ! e cp -a $f /${dir#*/*/}new; then echo failed cp; die=true; break; fi ; done; done
iankelling.org / git / distro-setup / blobdiff