Script to automate backups to BackBlaze B2 bucket

backup.sh

#!/bin/bash

YELLOW='\033[1;33m'
NOCOLOR='\033[0m'

# Backblaze B2 configuration variables
B2_ACCOUNT="ACCOUNT"
B2_KEY="KEY"
B2_BUCKET="BUCKET-NAME"

# Local directory to backup
LOCAL_DIR="/home/user/Documents"

# Log file
LOG_FILE="/var/log/backups.log"

# Threshold to remove files
OLDER_THAN="30D"

export PASSPHRASE="GPG-PASS"

notif_tag() {
  echo -e "${YELLOW}[?]${NOCOLOR} $1"
}

log() {
  date=$(date --rfc-3339=s)
  echo "[$date] - bucket: $B2_BUCKET - status: $1" >> $LOG_FILE
}

notif_tag "Removing files older than: $OLDER_THAN"
# Remove files older than 90 days
duplicity \
  remove-older-than ${OLDER_THAN} --force \
  b2://${B2_ACCOUNT}:${B2_KEY}@${B2_BUCKET}

notif_tag "Performing backup to bucket: $B2_BUCKET"
# Perform the backup
duplicity ${LOCAL_DIR} \
  b2://${B2_ACCOUNT}:${B2_KEY}@${B2_BUCKET}

if [ $? -eq 0 ]; then
    notify-send "Backup succeed on $B2_BUCKET"
    log "succeed"
else
    notify-send -u critical "Backup failed on $B2_BUCKET"
    log "failed"
fi

notif_tag "Cleaning failures"
# Cleanup failures
duplicity \
  cleanup --force \
  b2://${B2_ACCOUNT}:${B2_KEY}@${B2_BUCKET}

# Show collection-status
duplicity collection-status \
  b2://${B2_ACCOUNT}:${B2_KEY}@${B2_BUCKET}

unset YELLOW
unset NOCOLOR
unset LOG_FILE
unset OLDER_THAN
unset B2_ACCOUNT
unset B2_KEY
unset B2_BUCKET
unset LOCAL_DIR
unset PASSPHRASE