X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;f=switch-mail-host;h=32642240dd17cf4e4978accfa2f4a27ea92cc14c;hb=6561b24248188e5bce423acab25c2c14c7e5ce6d;hp=61e8966f52aa3fa25ae84e4992e16a24e8e164ea;hpb=ebd0ea323de3eacc11e1a624f8cc4f961d8bdb6c;p=distro-setup

diff --git a/switch-mail-host b/switch-mail-host
old mode 100755
new mode 100644
index 61e8966..3264224
--- a/switch-mail-host
+++ b/switch-mail-host
@@ -4,147 +4,157 @@ set -eE -o pipefail
 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 ########
 
-if (( $# != 2 )) || [[ $1 == -* || $2 == -* ]]; then
-    usage 1
-fi
+update_wrt=true # default
+temp=$(getopt -l help owh "$@") || usage 1
+mp_args=
+eval set -- "$temp"
+while true; do
+  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
+
+
+(( $# == 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
+  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
-    ssh_prefix=ssh
+  localhost_new=true
+  new_shell=
 else
-    localhost_new=false
-    ssh_prefix=
+  localhost_new=false
+  new_shell="ssh $new_host"
+fi
+
+old_shell="ssh $old_host"
+if [[ $old_host == "$HOSTNAME" ]]; then
+  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 timeout -s 9 10 ssh root@wrt.lan :; 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"
 
-source /a/bin/bash_unpublished/source-semi-priv
+source /a/bin/bash_unpublished/source-state
 #### begin convert private hostnames to public hostnames ####
-if ! $at_home; then
-    for var in old_host new_host; do
-        case ${!var} in
-            treetowl)
-                eval $var=$HOME_DOMAIN
-                ;;
-        esac
-    done
-fi
+#if ! $at_home; then
+#    for var in old_host new_host; do
+#        case ${!var} in
+#            tp)
+#                eval $var=$HOME_DOMAIN
+#                ;;
+#        esac
+#    done
+#fi
 ####  end convert private hostnames to public hostnames ####
 
 
 # because our port forward is not robust enough, we can't use proxy command,
-# todo: just open an ssh port to the world on wrt
-if ! $at_home; then
-    ssh_cmd="ssh $HOME_DOMAIN ssh wrt"
+# todo: setup vpn so this is all taken care of.
+if ! $update_wrt; then
+  wrt_shell=:
 else
-    ssh_cmd="ssh wrt"
-fi
-# 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 | $ssh_cmd cedit mail_host /etc/hosts
-else
-    $ssh_cmd bash -s <<EOFOUTER
-    cedit mail_host /etc/hosts <<'EOF' || /etc/init.d/dnsmasq restart
-\$(grep "\b$new_host\b" /etc/hosts | awk '{print $1}') mail.iankelling.org
-EOF
-EOFOUTER
+  wrt_shell="ssh wrt.b8.nz"
 fi
 
-mail-setup() {
-    shell="$1"
-    $shell sed -ri "s/MAIL_HOST=.*/MAIL_HOST=$new_host/" /a/bin/bash_unpublished/source-semi-priv
-    $shell /a/bin/distro-setup/mail-setup exim4
-}
-
-mail-setup "ssh $old_host"
-
-sudo dd of=/etc/btrbk.conf <<'EOF'
-ssh_identity /root/.ssh/id_rsa
-# Just a guess that local7 is a good facility to pick.
-# It's a bit odd that the transaction log has to be logged to
-# a file or syslog, while other output is sent to std out.
-# The man does not mention a way for them to be together, but
-# I dunno if setting a log level like warn might also output
-# transaction info.
-transaction_syslog local7
+new_hostname=$($new_shell hostname)
 
-# so we only run one at a time
-lockfile                   /var/lock/btrbk.lock
+########### end initial processing, begin actually modifying things ##########
 
-# 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
+restore_new_btrbk=false
+if $new_shell systemctl is-active btrbk.timer; then
+  $new_shell sudo systemctl stop btrbk.timer
+  echo "$0: note: stopped btrbk.timer on $new_host"
+  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
+  echo "$0: note: stopped btrbk.timer on $old_host"
+  restore_old_btrbk=true
+fi
 
-# if something fails and it's not obvious, try doing
-# btrbk -l debug -v dryrun
+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
+done
 
 
+$new_shell bash -xs <<'EOF'
+set -eE
+if mountpoint -q /m; then sudo umount /m; fi
+if mountpoint -q /o; then sudo umount /o; fi
 EOF
 
+# 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/exe/primary-setup $new_hostname
 
 if $localhost_new; then
-    btrbk_src=ssh://$old_host/mnt/root
-    btrbk_dst=/mnt/root/btrbk
+  btrbk-run -s $old_host $mp_args
 else
-    btrbk_src=/mnt/root
-    btrbk_dst=ssh://$old_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 $btrbk_dst
-EOF
-
+$new_shell /a/exe/primary-setup $new_hostname
 
-sudo btrbk --progress run
-$ssh_prefix $new_host mount-latest-subvol
-
-mail-setup
+if $restore_new_btrbk; then
+  $new_shell sudo systemctl start btrbk.timer
+fi
+if $restore_old_btrbk; then
+  $old_shell sudo systemctl start btrbk.timer
+fi