152 lines
4.4 KiB
Bash
Executable file
152 lines
4.4 KiB
Bash
Executable file
#!/usr/bin/env bash
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# Performs borgmatic backups and checks, given that
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# enough time has elapsed since the last one performed.
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# cerberus, 2022-02-03-1
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set -o pipefail
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[ -f /opt/borg/bin/borg ] && borg=/opt/borg/bin/borg || borg="$(command -v borg)"
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[ -f /opt/borg/bin/borgmatic ] && borgmatic=/opt/borg/bin/borgmatic || borgmatic="$(command -v borgmatic)"
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export LOG_FILE="/var/log/borgmatic-wrapper.log"
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export STATE_DIR="/var/tmp/borgmatic-wrapper"
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LIB_DIR="${LIB_DIR:-/usr/local/jilits}"
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script_name="$(basename -- "$0")"
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max_minutes_since_last_backup=""
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max_minutes_since_last_check=720
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. "$LIB_DIR/libverbosity.sh" || exit 127
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. "$LIB_DIR/libcommon.sh" || exit 127
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. "$LIB_DIR/libdatatype.sh" || exit 127
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. "$LIB_DIR/libdatetime.sh" || exit 127
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. "$LIB_DIR/libstate.sh" || exit 127
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eggsit() {
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rc=$?
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[ $rc -eq 0 ] && echlog "Script exiting ($rc)..."
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[ $rc -ne 0 ] && errlog "Script exiting ($rc)..."
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exit $rc
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}
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trap "eggsit" EXIT
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get_last_backup_ts() {
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local ts state_ttl="$((6 * 60 * 60))"
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ts="$(get_state CachedLastBackupTimestamp)"
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if [ -n "$ts" ]; then
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echo "$ts"
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return 0
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fi
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ts="$(sudo "$borgmatic" list --last 1 --successful --json | jq -r '.[0].archives[0].start')"
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set_state CachedLastBackupTimestamp "$ts" "$state_ttl"
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echo "$ts"
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}
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minutes_since_last_backup() {
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local ue
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ue="$(dt_to_ue "$(get_last_backup_ts)")"
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echo "$((($(current_ue) - ue) / 60))"
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}
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remote_is_online() {
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local host port
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host="$(cut -d: -f1 <<<"$1")"
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port="$(cut -d: -f2 <<<"$1")"
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nc -zvw1 "${host:?Missing remote host}" "${port:?Missing remote port}" | tee -a "$LOG_FILE" >/dev/null
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}
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perform_backup() {
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echlog "Running backup."
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rm_state CachedLastBackupTimestamp
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rm_state LastBackupPrettyTimestamp
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"$borgmatic" create --files --stats --verbosity 2 --syslog-verbosity -1 2>&1 | tee -a "$LOG_FILE" || return 1
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set_state LastBackupPrettyTimestamp "$(dt_to_pretty "$(get_last_backup_ts)")" "$((4 * 60 * 60))"
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"$borgmatic" prune --stats --verbosity 2 --syslog-verbosity -1 2>&1 | tee -a "$LOG_FILE" || return 2
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}
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perform_check() {
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echlog "Running check."
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rm_state LastCheckUnixEpoch
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"$borgmatic" check --progress --verbosity 2 --syslog-verbosity -1 2>&1 | tee -a "$LOG_FILE" || return 1
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set_state LastCheckUnixEpoch "$(current_ue)" "$((24 * 60 * 60))"
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}
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function usage() {
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echo "Usage: $script_name [OPTIONS]"
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echo
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echo "Options:"
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echo " -h Display help."
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echo " -b [MINUTES] Max minutes since last backup. "
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echo " -c [MINUTES] Max minutes since last check."
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echo " -r [HOST:PORT] Ensure remote is online before running actions."
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}
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while getopts ":b:c:r:h" arg; do
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case $arg in
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b) max_minutes_since_last_backup=$OPTARG ;;
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c) max_minutes_since_last_check=$OPTARG ;;
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r) remote_host_port=$OPTARG ;;
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h)
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usage
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exit 0
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;;
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:)
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echo "$script_name: Must supply a value with -$OPTARG." >&2
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usage
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exit 1
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;;
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?)
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echo "Invalid option: -${OPTARG}."
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echo
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usage
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exit 2
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;;
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esac
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done
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rotlog 10000000
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if ! is_int "$max_minutes_since_last_backup"; then
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usage
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echlog
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echxit "ERROR: Invalid or unset value for argument -b: '$max_minutes_since_last_backup'" 2
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fi
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for bin in jq nc; do
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if ! command -v "$bin" >/dev/null; then
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echxit "ERROR: '$bin' not installed" 3
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fi
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done
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if ! im_root; then
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echxit "ERROR: This script must be run as root" 1
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elif pgrep -f "$borg" >/dev/null; then
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echxit "ERROR: Borg seems to be active already" 11
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elif [ -n "$remote_host_port" ]; then
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if ! remote_is_online "$remote_host_port"; then
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echxit "ERROR: Unable to reach $remote_host_port" 12
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fi
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fi
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echlog "The last backup was carried out $(minutes_since_last_backup) minutes ago (>=$max_minutes_since_last_backup)."
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if [[ "$(minutes_since_last_backup)" -ge "$max_minutes_since_last_backup" ]]; then
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perform_backup || echxit "ERROR: Backup returned errors" 21
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fi
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last_check_unixepoch="$(get_state LastCheckUnixEpoch)" || last_check_unixepoch=0
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minutes_since_last_check="$((($(current_ue) - last_check_unixepoch) / 60))"
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echo "The last check was carried out $minutes_since_last_check minutes ago (>=$max_minutes_since_last_check)." | tee -a "$LOG_FILE"
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if [[ "$minutes_since_last_check" -ge "$max_minutes_since_last_check" ]]; then
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perform_check || echxit "ERROR: Check returned errors" 21
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fi
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echo "Script finished."
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