initial commit

borgbackup.sh

+#!/bin/bash
+set -euo pipefail
+
+# some helpers and error handling:
+info() { printf "\n%s %s\n\n" "$( date )" "$*" >&2; }
+trap 'echo $( date ) Backup interrupted >&2; exit 2' INT TERM
+
+# load config
+source ./borgbackup.config.sh
+
+# borg backup
+info "Starting backup"
+TMPFILE1="$(tempfile)"
+borg create \
+     --verbose \
+     --stats \
+     --compression "$COMPRESS" \
+     $BORG_PARAMS \
+     '::{hostname}-{now}' \
+     $BORG_PATHS \
+     2>&1 | tee "$TMPFILE1"
+backup_exit=$?
+
+
+# Use the `prune` subcommand to maintain 7 daily, 4 weekly and 12 monthly
+# archives of THIS machine. --prefix `hostname`- is very important to
+# limit prune's operation to this machine's archives and not apply to
+# other machine's archives also.
+info "Pruning repository"
+TMPFILE2="$(tempfile)"
+borg prune \
+     --prefix '{hostname}-' \
+     --verbose \
+     --list \
+     --show-rc \
+     --keep-daily 30 \
+     --keep-weekly 4 \
+     --keep-monthly 12 \
+     2>&1 | tee "$TMPFILE2"
+prune_exit=$?
+
+# Dump the exit codes to /var/log. Icinga2 checks the location to examine the backup results
+log_dir="/var/log/borg"
+mkdir -p "$log_dir" || (info "Failed to \`mkdir -p $log_dir\`" && global_exit=1)
+echo -e "create: $backup_exit\nprune: $prune_exit" > "$log_dir/borg-rc.log"
+
+# use highest exit code as global exit code
+global_exit=$(( backup_exit > prune_exit ? backup_exit : prune_exit ))
+
+
+# error mail sending
+if [ $global_exit != 0 ]; then
+    /usr/bin/logger -t backup "Exited abnormally with [$backup_exit][$prune_exit]"
+    MAIL="# borg create:\n"
+    MAIL+="$(cat '$TMPFILE1')\n\n"
+    MAIL+="# borg prune:\n"
+    MAIL+="$(cat '$TMPFILE2')\n\n"
+    MAIL+="# borg list:\n"
+    MAIL+="$(borg list)\n\n"
+    MAIL+= "Cheers,\n$HOSTNAME"
+    echo -e "$MAIL" | mail -a "Content-Type: text/plain; charset=UTF-8" -s "$HOSTNAME: borgbackup failed!" "$ADMINMAIL"
+fi
+rm -f "$TMPFILE1" "$TMPFILE2"
+
+
+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
+exit ${global_exit}
+