usage() {
cat <<EOF
-Usage: ${0##*/} [OPTIONS] push|pull HOST
+Usage: switch-mail-host|switch-host2 [OPTIONS] push|pull HOST
Turn off mail receiving on OLD_HOST, run btrbk to move mail to NEW_HOST,
turn on mail receiving on NEW_HOST. Assumes we want to move all
filesystems unless passing -o.
+-a Avoid snapshot /a, /q, and similar. If we haven't
+ made any changes in the last hour, there is no
+ need to snapshot anything but /o, and we will
+ just do that once.
-i Disallow incremental backup.
-o Only btrbk /o, instead of all filesystems.
--force Run even though our local state does not say that MAIL_HOST is
fi
}
-pre="$script_name:"
+pre="${SSH_CLIENT:+$HOSTNAME} $script_name:"
m() { printf "$pre %s\n" "$*"; "$@"; }
e() { printf "$pre %s\n" "$*"; }
err() { echo "$pre ERROR: $*" >&2; }
mail_only=false
host2_only=false
force=false
-mp_args="-m /o,/q,/a"
-temp=$(getopt -l force,help ioh "$@") || usage 1
+mp_args="-m /o,/a,/ar,/q,/qd,/qr"
+temp=$(getopt -l force,help aioh "$@") || usage 1
eval set -- "$temp"
while true; do
case $1 in
+ -a) snapshot_arg=resume ;;
--force) force=true ;;
-i) incremental_arg="-i" ;;
-o)
new_host=$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:"
+ $new_shell -v hostname
+ fi
;;
pull)
old_host=$host
new_hostname=$HOSTNAME
bbk_args="-s $old_host"
old_shell="ssh -F $HOME/.ssh/confighome root@$old_host"
+ 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
;;
esac
-
if $mail_only; then
mp_args="-m /o"
elif $host2_only; then
- mp_args="-m /a,/ar,/q,/qr"
+ mp_args="-m /a,/ar,/q,/qd,/qr"
fi
-
-
-if [[ $old_hostname != "$MAIL_HOST" ]] && ! $force; then
- err "\$old_hostname($old_hostname) != \$MAIL_HOST($MAIL_HOST). Rerun with --force if you really want this."
- exit 1
+if ! $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" ]]; then
+ err "\$old_hostname($old_hostname) != \$MAIL_HOST($MAIL_HOST). Rerun with --force if you really want this."
+ exit 1
+ fi
fi
if [[ ! $new_host || ! $old_host ]]; then
cat <<'EOF'
set -eE
if pgrep -G iank -u iank -f 'emacs --daemon' &>/dev/null; then
- export XDG_RUNTIME_DIR=/run/user/1000
- bufs="$(emacsclient --eval "$(cat /a/bin/ds/unsaved-buffers.el)"| sed '/^"nil"$/d;s/^"(/E: /;s/)"$//')"
+ bufs="$(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
EOF
if ! $host2_only; then
- cat <<'EOF'
+ cat <<EOF
for dir in m o; do
- if mountpoint -q /$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
$old_shell bash -s <<'EOF'
if pgrep -G iank -u iank -f 'emacs --daemon' &>/dev/null; then
- export XDG_RUNTIME_DIR=/run/user/1000
- bufs="$(emacsclient --eval "$(cat /a/bin/ds/unsaved-buffers.el)"| sed '/^"nil"$/d;s/^"(/E: /;s/)"$//')"
+ bufs="$(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
e Running initial btrbk
-if ! m btrbk-run -v $bbk_args $incremental_arg $mp_args; then
- ret=$?
+m btrbk-run -v $bbk_args $incremental_arg $mp_args $snapshot_arg || ret=$?
+if (( ret )); then
err "failed initial btrbk"
exit $ret
fi
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 $new_hostname; then
- ret=$?
+m $old_shell /a/exe/primary-setup $new_hostname || ret=$?
+if (( ret )); then
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
#
# shopt -s nullglob; find . -type f -mtime -2 | while read -r f; do a=( /m/4e/Sent/cur/${f%,*}* ); if (( ${#a[@]} )); then e exists $a; else m cp -a $f /m/4e/Sent/cur; fi; done
-if ! m $new_shell /a/exe/primary-setup localhost; then
- ret=$?
+m $new_shell /a/exe/primary-setup localhost || ret=$?
+if (( ret )); then
err "failed final primary-setup, just fix and rerun: $new_shell /a/exe/primary-setup localhost"
exit $ret
fi
iankelling.org / git / distro-setup / blobdiff