#!/bin/bash
-err-bash-trace() {
- local -i argc_index=0 frame i start=${1:-0} max_indent=8 indent
- local source
- local extdebug=false
- if [[ $(shopt -p extdebug) == *-s* ]]; then
- extdebug=true
- fi
- for ((frame=0; frame < ${#FUNCNAME[@]}-1; frame++)); do
- argc=${BASH_ARGC[frame]}
- argc_index+=$argc
- ((frame < start)) && continue
- if (( ${#BASH_SOURCE[@]} > 1 )); then
- source="${BASH_SOURCE[frame+1]}:${BASH_LINENO[frame]}:"
- fi
- indent=$((frame-start + 1))
- indent=$((indent < max_indent ? indent : max_indent))
- printf "%${indent}s↳%sin \`%s" '' "$source" "${FUNCNAME[frame]}"
- if $extdebug; then
- for ((i=argc_index-1; i >= argc_index-argc; i--)); do
- printf " %s" "${BASH_ARGV[i]}"
- done
- fi
- echo \'
- done
- return 0
-}
-
-
-err-catch() {
- set -E; shopt -s extdebug
- _err-trap() {
- err=$?
- exec >&2
- set +x
- echo "${BASH_SOURCE[1]}:${BASH_LINENO[0]}: \`$BASH_COMMAND' returned $err"
- err-bash-trace 2
- set -e # err trap does not work within an error trap
- "${_errcatch_cleanup[@]:-:}" # note :-: is to be compatible with set -u
- echo "$0: exiting with code $err"
- exit $err
- }
- trap _err-trap ERR
- set -o pipefail
-}
-err-catch
+source /usr/local/lib/err
usage() {
cat <<EOF
-Usage: ${0##*/} OLD_HOST NEW_HOST
+Usage: ${0##*/} 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
restore_new_btrbk=false
restore_old_btrbk=false
-cleanup() {
+err-cleanup() {
if $restore_new_btrbk; then
- $new_shell sudo systemctl start btrbk.timer
+ e WARNING: due to failure, btrbk.timer may need manual restoration:
+ e $new_shell sudo systemctl start btrbk.timer
fi
if $restore_old_btrbk; then
- $old_shell sudo systemctl start btrbk.timer
+ e WARNING: due to failure, btrbk.timer may need manual restoration:
+ e $old_shell sudo systemctl start btrbk.timer
fi
}
-_errcatch_cleanup=cleanup
pre="${0##*/}:"
m() { printf "$pre %s\n" "$*"; "$@"; }
e() { printf "$pre %s\n" "$*"; }
+err() { echo "$pre ERROR: $*" >&2; }
+mexit() { echo "$pre exiting with status $1"; exit $1; }
##### begin command line parsing ########
-temp=$(getopt -l help owh "$@") || usage 1
+force=false
mp_args="-m /o,/q,/a"
+temp=$(getopt -l force,help owh "$@") || usage 1
eval set -- "$temp"
while true; do
case $1 in
+ --force) force=true ;;
-o) mp_args="-m /o"; shift ;;
-h|--help) usage ;;
--) shift; break ;;
- *) echo "$0: Internal error! unexpected args: $*" ; exit 1 ;;
+ *) echo "$0: Internal error! unexpected args: $*" ; mexit 1 ;;
esac
done
(( $# == 2 )) || usage 1
-old_host=$1
-new_host=$2
-source /a/bin/bash_unpublished/source-state
-
-if [[ $old_host != $MAIL_HOST ]]; then
- read -p "warning: \$old_host != \$MAIL_HOST: $old_host != $MAIL_HOST, proceed? y/N "
- if [[ $REPLY != [yY] ]]; then
- exit 1
- fi
+if [[ ! $HOSTNAME ]]; then
+ err '$HOSTNAME is unset'
+ mexit 1
fi
-if [[ $new_host == "$HOSTNAME" ]]; then
- localhost_new=true
- new_shell=
-else
- localhost_new=false
- new_shell="ssh $new_host"
-fi
+case $1 in
+ push)
+ old_host=$HOSTNAME
+ old_hostname=$HOSTNAME
+ new_host=$2
+ bbk_args="-t $new_host"
+ new_shell="ssh $new_host"
+ new_hostname=$($new_shell hostname)
+ ;;
+ pull)
+ old_host=$2
+ new_host=$HOSTNAME
+ new_hostname=$HOSTNAME
+ bbk_args="-s $old_host"
+ old_shell="ssh $old_host"
+ # tests ssh connection
+ old_hostname=$($old_shell hostname)
+ ;;
+ *)
+ err invalid first argument
+ mexit 1
+ ;;
+esac
-old_shell="ssh $old_host"
-if [[ $old_host == "$HOSTNAME" ]]; then
- old_shell=
+source /a/bin/bash_unpublished/source-state
+
+if [[ $old_hostname != "$MAIL_HOST" ]] && ! $force; then
+ err "\$old_hostname($old_hostname) != \$MAIL_HOST($MAIL_HOST). Rerun with --force if you really want this."
+ mexit 1
fi
if [[ ! $new_host || ! $old_host ]]; then
echo "$0: bad args. see script"
- exit 1
+ mexit 1
fi
-source /a/bin/bash_unpublished/source-state
-
-
-new_hostname=$($new_shell hostname)
-
########### end initial processing, begin actually modifying things ##########
if $new_shell systemctl is-active btrbk.timer; then
fi
btrbk_test="systemctl is-active btrbk.service"
-while [[ $($new_shell $btrbk_test) != inactive ]] || [[ $($old_shell $btrbk_test) != inactive ]]; do
- echo "$0: btrbk is running on new or old host. sleeping for 8 seconds"
- sleep 6
- echo "$0: testing for btrbk activity in 2 seconds"
- sleep 2
+active=true
+while $active; do
+ active=false
+ for shell in "$new_shell" "$old_shell"; do
+ e $shell $btrbk_test
+ status=$($shell $btrbk_test) ||:
+ case $status in
+ inactive|failed) : ;;
+ *)
+ # This covers conditions like "activating", which still return 3 from
+ # systemctl is-active.
+ active=true
+ e "btrbk active on shell:$shell, status:$status, sleeping 8 seconds"
+ sleep 8
+ break
+ ;;
+ esac
+ done
done
# ensure these are unused before doing anything
# I think exim will try ipv6 first, so no need to disable
# ipv6 i think.
+
+e Running initial btrbk
+if ! m btrbk-run -v $bbk_args $mp_args; then
+ ret=$?
+ err "failed initial btrbk"
+ mexit $ret
+fi
+
m $old_shell /a/exe/primary-setup $new_hostname
-if $localhost_new; then
- m btrbk-run -v -s $old_host $mp_args
-else
- m btrbk-run -v -t $new_host $mp_args
+e Running main btrbk
+m btrbk-run -v $bbk_args -m /o || ret=$?
+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
+ m $old_shell /a/exe/primary-setup localhost
+ mexit $ret
fi
-m $new_shell /a/exe/primary-setup $new_hostname
+m $new_shell /a/exe/primary-setup localhost
+
+mexit 0
iankelling.org / git / distro-setup / blobdiff