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#!/bin/bash
# Adapted from https://borgbackup.readthedocs.io/en/stable/quickstart.html#automating-backups
export SSH_SERVER="<%= @user %>@<%= @host %>"
export SSH_PORT="<%= @port %>"
export HOSTNAME=`cat /etc/hostname`
# Setting this, so the repo does not need to be given on the commandline:
export BORG_REPO=ssh://$SSH_SERVER:$SSH_PORT//var/backups/remote/$HOSTNAME/borg
# Setting this, so you won't be asked for your repository passphrase:
export BORG_PASSPHRASE='<%= @password %>'
# or this to ask an external program to supply the passphrase:
#export BORG_PASSCOMMAND='pass show backup'
# Custom keyfile support
if [ "<%= @encryption %>" == "keyfile" ] && [ ! -z "<%= @keyfile %>" ]; then
if [ ! -e "<%= @keyfile %>" ]; then
fatal "Keyfile not found: <%= @keyfile %>. Please create it manually."
fi
export BORG_KEY_FILE="<%= @keyfile %>"
fi
# some helpers and error handling:
#info() { printf "\n%s %s\n\n" "$( date )" "$*" >&2; }
trap 'info $( date ) Backup interrupted >&2; exit 2' INT TERM
# Check
if [ "$1" == "--check" ]; then
borg list
exit $?
fi
# Initialize
if ! ssh $SSH_SERVER -p $SSH_PORT test -f /var/backups/remote/$HOSTNAME/borg/config; then
info "Initializing borg repository at ssh://$SSH_SERVER:$SSH_PORT//var/backups/remote/$HOSTNAME/borg..."
borg init --encryption=<%= @encryption %> ssh://$SSH_SERVER:$SSH_PORT//var/backups/remote/$HOSTNAME/borg
init_exit=$?
if [ "$init_exit" != "0" ]; then
fatal "Error initializing repository"
fi
fi
# Backup the most important directories into an archive named after
# the machine this script is currently running on:
info "Starting backup..."
borg create \
--verbose \
--filter AME \
--list \
--stats \
--show-rc \
--compression lz4 \
--exclude-caches \
--exclude '/home/*/.cache/*' \
--exclude '/var/cache/*' \
--exclude '/var/tmp/*' \
<% @exclude_unencrypted.each do |del| -%>
--exclude <%= del %> \
<% end -%>
::'{hostname}-{now}' \
<% @include_unencrypted.each do |add| -%>
<%= add %> \
<% end -%>
backup_exit=$?
#if [ "$backup_exit" != "0" ]; then
# fatal "Error creating snapshot"
#fi
info "Pruning repository..."
# Use the `prune` subcommand to maintain 7 daily, 4 weekly and 6 monthly
# archives of THIS machine. The '{hostname}-' prefix is very important to
# limit prune's operation to this machine's archives and not apply to
# other machines' archives also:
borg prune \
--list \
--prefix '{hostname}-' \
--show-rc \
--keep-daily <%= @keepdaily %> \
--keep-weekly <%= @keepweekly %> \
--keep-monthly <%= @keepmonthly %> \
prune_exit=$?
#if [ "$prune_exit" != "0" ]; then
# fatal "Error pruning repository"
#fi
# Use highest exit code as global exit code
global_exit=$(( backup_exit > prune_exit ? backup_exit : prune_exit ))
if [ ${global_exit} -eq 1 ]; then
info "Backup and/or Prune finished with a warning"
fi
if [ ${global_exit} -gt 1 ]; then
info "Backup and/or Prune finished with an error"
fi
if [ "${global_exit}" != "0" ]; then
fatal "Error completing borg action: exit code ${global_exit}"
fi
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