67 lines
2.5 KiB
Bash
67 lines
2.5 KiB
Bash
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#!/bin/bash
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SCRIPT_ABS_LOCATION=$(realpath "$(dirname "${0}")")
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source $SCRIPT_ABS_LOCATION/duplicati-backup.env
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source $SCRIPT_ABS_LOCATION/../logger.sh
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# Container Name
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CONTAINER="duplicati"
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SOURCE_DIR="/mnt/data/duplicati"
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SSH_DESTINATION="$SSH_DESTINATION"
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BACKUP_ENCR_PASSPHRASE="$BACKUP_ENCR_PASSPHRASE"
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# Cloud Storage Authentication
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SSH_USERNAME="$SSH_USERNAME"
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SSH_PASSWORD="$SSH_PASSWORD"
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SSH_KEY="$SSH_KEY"
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# Set default values for parameters
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MAX_BACKUPS=7
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BACKUP_FOLDER=""
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# Log file
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LOG_FILE="$SCRIPT_ABS_LOCATION/duplicati-backup.log"
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# Override default values with command-line arguments
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while getopts ":f:h:u:p:m:b:" opt; do
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case $opt in
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f) SOURCE_DIR="$OPTARG";;
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h) SSH_DESTINATION="$OPTARG";;
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u) SSH_USERNAME="$OPTARG";;
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p) SSH_PASSWORD="$OPTARG";;
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m) MAX_BACKUPS="$OPTARG";;
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b) BACKUP_FOLDER="$OPTARG";;
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\?) echo "Invalid option: -$OPTARG"; exit 1;;
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esac
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done
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# Create a temporary file for the encrypted archive
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TMP_FILENAME=duplicati_db-$(date +"%Y%m%d").bak &&
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TMP_FILEPATH=$SCRIPT_ABS_LOCATION || { log "Error: Failed to create a temporary file."; exit 1; }
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# Create the encrypted archive using tar and openssl
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log "Compressing and excrypting the Duplicati Databases"
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sudo tar -czf - "$SOURCE_DIR" | openssl enc -aes-256-cbc -pbkdf2 -pass pass:$BACKUP_ENCR_PASSPHRASE > $TMP_FILEPATH/$TMP_FILENAME || { log "Error: Failed to create encrypted archive."; exit 1; }
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# Connect to the backup host and count the number of existing backups
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log "Fetching number of backups in destination folder"
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EXISTING_BACKUPS=$(ssh $SSH_USERNAME@$SSH_DESTINATION -p 23 -i $SSH_KEY "ls" | sudo wc -l) || { log "Error: Failed to count existing backups."; exit 1; }
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# Remove old backups if there are too many
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if (( $EXISTING_BACKUPS > $MAX_BACKUPS )); then
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log "Removing old backups in order to save space"
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ssh $SSH_USERNAME@$SSH_DESTINATION -p 23 -i $SSH_KEY "ls -t $BACKUP_FOLDER | tail -n +$((MAX_BACKUPS+1)) | xargs rm" || { log "Error: Failed to remove old backups."; exit 1; }
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fi
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# Transfer the encrypted archive to the backup host using scp
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log "Transfering archive to SSH Destination"
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scp -v -P 23 -i "$SSH_KEY" "$TMP_FILEPATH/$TMP_FILENAME" "$SSH_USERNAME@$SSH_DESTINATION:$BACKUP_FOLDER$TMP_FILENAME" || { log "Error: Failed to transfer the encrypted archive."; exit 1; }
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# Remove the temporary file
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log "Cleaning up files"
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rm "$TMP_FILEPATH/$TMP_FILENAME" || { log "Error: Failed to remove the temporary file."; exit 1; }
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log "Backup completed successfully."
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