Duplicity backup script

backup.sh

#!/bin/bash
set -euo pipefail
IFS=$'\n\t'

BASE_DIR='[REDACTED]'
mkdir -p "${BASE_DIR}"

STATUS_FILE="${BASE_DIR}/duplicity.running"
function finish {
  rm "${STATUS_FILE}"
}
trap finish EXIT

LOG_DIR="${BASE_DIR}/logs"
mkdir -p "${LOG_DIR}"

LOCAL_SOURCE_DIR='[REDACTED]'
SFTP_CONNECTION='[REDACTED]'
SFTP_DIRECTORY='[REDACTED]'

export PASSPHRASE='[REDACTED]'

echo "obtaining collection status" > "${STATUS_FILE}"
set +e  # In case we need to wake up the remote SFTP server
duplicity \
  collection-status \
  --log-file "${LOG_DIR}/$( date --utc '+%Y%m%d-%H%M%S' )-status.log" \
  --verbosity 'notice' \
  "paramiko+sftp://${SFTP_CONNECTION}/${SFTP_DIRECTORY}"
set -e

echo "running backup" > "${STATUS_FILE}"
duplicity \
  --full-if-older-than '3M' \
  --include-filelist "${BASE_DIR}/config/include.txt" \
  --log-file "${LOG_DIR}/$( date --utc '+%Y%m%d-%H%M%S' )-backup.log" \
  --verbosity 'notice' \
  "${LOCAL_SOURCE_DIR}" \
  "paramiko+sftp://${SFTP_CONNECTION}/${SFTP_DIRECTORY}"

echo "removing outdated backups" > "${STATUS_FILE}"
duplicity \
  remove-all-but-n-full '2' \
  --force \
  --log-file "${LOG_DIR}/$( date --utc '+%Y%m%d-%H%M%S' )-remove.log" \
  --verbosity 'notice' \
  "paramiko+sftp://${SFTP_CONNECTION}/${SFTP_DIRECTORY}"

echo "cleaning up unnecessary backup files" > "${STATUS_FILE}"
duplicity \
  cleanup \
  --force \
  --log-file "${LOG_DIR}/$( date --utc '+%Y%m%d-%H%M%S' )-cleanup.log" \
  --verbosity 'notice' \
  "paramiko+sftp://${SFTP_CONNECTION}/${SFTP_DIRECTORY}"

echo "done" > "${STATUS_FILE}"