trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
usage() {
- cat <<EOF
+ cat <<EOF
Usage: ${0##*/} OLD_HOST NEW_HOST
Adjust home network dns so NEW_HOST resolves locally if it is on the
local network. Turn off mail receiving on OLD_HOST, run btrbk to move
mail to NEW_HOST, turn on mail receiving on NEW_HOST.
+-o Only btrbk /o, instead of all filesystems.
-w Don't try to ssh to wrt. Should only be used in unusual network situation.
-h|--help Print help and exit.
Note: Uses GNU getopt options parsing style
EOF
- exit $1
+ exit $1
}
##### begin command line parsing ########
update_wrt=true # default
-temp=$(getopt -l help wh "$@") || usage 1
+temp=$(getopt -l help owh "$@") || usage 1
+mp_args=
eval set -- "$temp"
while true; do
- case $1 in
- -w) update_wrt=false; shift ;;
- -h|--help) usage ;;
- --) shift; break ;;
- *) echo "$0: Internal error! unexpected args: $*" ; exit 1 ;;
- esac
+ case $1 in
+ -o) mp_args="-m /o"; shift ;;
+ -w) update_wrt=false; shift ;;
+ -h|--help) usage ;;
+ --) shift; break ;;
+ *) echo "$0: Internal error! unexpected args: $*" ; exit 1 ;;
+ esac
done
source /a/bin/bash_unpublished/source-semi-priv
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
+ read -p "warning: \$old_host != \$MAIL_HOST: $old_host != $MAIL_HOST, proceed? y/N "
+ if [[ $REPLY != [yY] ]]; then
+ exit 1
+ fi
fi
if [[ $new_host == "$HOSTNAME" ]]; then
- localhost_new=true
- new_shell=
+ localhost_new=true
+ new_shell=
else
- localhost_new=false
- new_shell="ssh $new_host"
+ localhost_new=false
+ new_shell="ssh $new_host"
fi
old_shell="ssh $old_host"
if [[ $old_host == "$HOSTNAME" ]]; then
- old_shell=
+ old_shell=
fi
if [[ ! $new_host || ! $old_host ]]; then
- echo "$0: bad args. see script"
- exit 1
+ echo "$0: bad args. see script"
+ exit 1
fi
at_home=false
-if [[ $HOSTNAME == tp ]] || [[ $HOSTNAME == frodo ]] || timeout -s 9 5 ssh wrt.b8.nz :; then
- at_home=true
+if timeout -s 9 5 ssh-keyscan -p 2220 -t rsa 10.0.0.1 2>/dev/null | grep -qFx '[10.0.0.1]:2220 ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCH+/h1dGEfKEusBblndU2e6QT4wLCm5+yqr/sqh/0X9YfjR7BfWWm8nNmuP55cYc+Wuf5ljB1H1acXEcsl1y8e0j3agHfF0V74FE1N1zz5nn2Ep8NHnmqgEhza38ZxMPh+4p3X7zklEKU7+3SzybKBi8sg0wLzlS2LM0JaUN80zR2sK11Kye3dURUXPk78u5wodOkgcEYRwSYaDMJlUzWP+poRXIDJwFaMQnwmxbl/c84yOyaU0x/d6hFwoRscWecihX+vvBNeSyxR4xr2HDOyUWwJkctyAgt2p7w3tfkXOKcCRzTAjGVIMQLTvo0sG/yJbcyHoEFdFybCsgDvfyYn'; then
+ at_home=true
fi
echo "$0: at_home = $at_home"
# because our port forward is not robust enough, we can't use proxy command,
# todo: setup vpn so this is all taken care of.
if ! $update_wrt; then
- wrt_shell=:
-elif $at_home; then
- wrt_shell="ssh wrt.b8.nz"
+ wrt_shell=:
else
- if [[ $old_host == iank.vpn.office.fsf.org || $new_host == iank.vpn.office.fsf.org ]]; then
- wrt_shell="ssh iank.vpn.office.fsf.org ssh wrt.b8.nz"
- else
- wrt_shell="ssh $HOME_DOMAIN ssh wrt.b8.nz"
- fi
+ wrt_shell="ssh wrt.b8.nz"
fi
btrbk_test="systemctl is-active btrbk.service"
while $new_shell $btrbk_test || $old_shell $btrbk_test; 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
+ echo "$0: btrbk is running on new or old host. sleeping for 8 seconds"
+ sleep 6
+ echo "$0: testing for btrbk activity in 2 seconds"
+ sleep 2
done
new_hostname=$($new_shell hostname)
restore_new_btrbk=false
if $new_shell systemctl is-active btrbk.timer; then
- $new_shell sudo systemctl stop btrbk.timer
- restore_new_btrbk=true
+ $new_shell sudo systemctl stop btrbk.timer
+ restore_new_btrbk=true
fi
restore_old_btrbk=false
if $old_shell systemctl is-active btrbk.timer; then
- $old_shell sudo systemctl stop btrbk.timer
- restore_old_btrbk=true
+ $old_shell sudo systemctl stop btrbk.timer
+ restore_old_btrbk=true
fi
if mountpoint -q /o; then sudo umount /o; fi
EOF
-# if new_host is not on home network, make mail.iankelling.org not resolve
-# on the home network.
-if [[ $new_host == $HOSTNAME ]] && ! $at_home; then
- echo | $wrt_shell cedit mail_host /etc/hosts || [[ $? == 1 ]] # 1 means file changed.
-else
- $wrt_shell bash -xs $new_host <<'EOFOUTER'
-new_host=$1
-cedit mail_host /etc/hosts <<EOF || /etc/init.d/dnsmasq restart
-$(grep "\b$new_hostname\b" /etc/hosts | awk '{print $1}') mail.iankelling.org
-EOF
-EOFOUTER
-fi
+# previously, I was checking to see if the new mail host
+# is on my home network, then changing my home dns
+# to resolve on the local network, so that I didnt
+# have to send traffic out to the internet or rely
+# on that. However, that breaks for a laptop that roams.
+# So, we could have a cronjob that updates that dns,
+# however, another solution is to just use ipv6,
+# and I prefer that.
+#
+# TODO: enable ipv6 for email. exim config setting disables it.
+# need to add vpn support. need to add firewall / routing.
+# I think exim will try ipv6 first, so no need to disable
+# ipv6 i think.
-$old_shell /a/bin/distro-setup/install-my-scripts
$old_shell primary-setup $new_hostname
-sudo dd of=/etc/btrbk.conf <<'EOF'
-ssh_identity /root/.ssh/home
-# Just a guess that local7 is a good facility to pick.
-# It's a bit odd that the transaction log has to be logged to
-# a file or syslog, while other output is sent to std out.
-# The man does not mention a way for them to be together, but
-# I dunno if setting a log level like warn might also output
-# transaction info.
-transaction_syslog local7
-
-# so we only run one at a time
-lockfile /var/lock/btrbk.lock
-
-# default format of short does not accomidate hourly preservation setting
-timestamp_format long-iso
-
-# only make a snapshot if things have changed
-snapshot_create onchange
-# I could make this different from target_preserve,
-# if one disk had less space.
-# for now, keeping them equal.
-snapshot_preserve 36h 14d 8w 24m
-snapshot_preserve_min 4h
-snapshot_dir btrbk
-
-# so, total backups = ~89
-target_preserve 36h 14d 8w 24m
-target_preserve_min 4h
-
-# if something fails and it's not obvious, try doing
-# btrbk -l debug -v dryrun
-
-
-EOF
-
-
if $localhost_new; then
- btrbk_src=ssh://$old_host/mnt/root
- btrbk_dst=/mnt/root/btrbk
+ btrbk-run -s $old_host $mp_args
else
- btrbk_src=/mnt/root
- btrbk_dst=ssh://$new_host/mnt/root/btrbk
+ btrbk-run -t $new_host $mp_args
fi
-sudo tee -a /etc/btrbk.conf <<EOF
-volume $btrbk_src
-subvolume o
-target send-receive $btrbk_dst
-EOF
-
-
-sudo btrbk -l debug --progress run
-$new_shell /a/bin/distro-setup/install-my-scripts
-$new_shell mount-latest-subvol
$new_shell primary-setup $new_hostname
if $restore_new_btrbk; then
- $new_shell sudo systemctl start btrbk.timer
+ $new_shell sudo systemctl start btrbk.timer
fi
if $restore_old_btrbk; then
- $old_shell sudo systemctl start btrbk.timer
+ $old_shell sudo systemctl start btrbk.timer
fi
iankelling.org / git / distro-setup / blobdiff