Nextcloud

Le backup export en utilisant la commande Export du Snap vers le répertoire par défaut et non changeable /var/snap/nextcloud/common/backups. Celui si est "symlinké" avec un répertoire sur les disques grandes capacités /mnt/data/backup.

Le fichier obtenu est compressé et envoyé par rsync vers le NAS Synology FGM-ARBRE. Pour cela l'utilisateur rsync a été créé avec autorisation d'accès rsync, et répertoire de backup sur Arbre.

Le répertoire de données Nextcloud /data est directement synchronisé avec son propre répertoire sur le backup d'Arbre.

Les logs sont sauvegardés dans /var/log/.

Les répertoires intermédiaires sont vidés avant traitement, les logs sont limités ansi que le nombre de fichier compressé de Nexcloud (database, paramétrages...)

   #!/bin/bash

    # Variables
    NEXTCLOUD_EXPORT_DIR="/var/snap/nextcloud/common/backups"  # Default Nextcloud Snap export directory
    LOCAL_TEMP_DIR="/mnt/data/backup/temp"             # Temporary local storage
    NAS_USER="rsync"                                  # Synology NAS username
    NAS_HOST="192.168.1.41"                       # Synology NAS hostname or IP
    SRV_CERTIFICATE="~/.ssh/rsync_key"
    NAS_BACKUP_DIR="/volume1/NextcloudBackUp"              # Destination path on Synology NAS
    DATE=$(date +'%Y-%m-%d_%H-%M-%S')                         # Timestamp for backup
    LOG_DIR="/var/log"                                        # Log directory
    LOG_FILE="$LOG_DIR/nextcloud_backup_$DATE.log"             # New log file with date-based name
    MAX_BACKUPS=5                                             # Maximum number of backups to keep on NAS
    CONFIG_DB_ARCHIVE="$LOCAL_TEMP_DIR/nextcloud_config_db_$DATE.tar.gz" # Compressed export for config and DB
    DATA_DIR="/mnt/ncdata/data"      # Nextcloud data directory

    # Ensure local temporary storage directory exists
    mkdir -p "$LOCAL_TEMP_DIR"

    # Clean up old log files to keep only the latest 10
    echo "[$(date)] Cleaning up old log files..." | tee -a "$LOG_FILE"
    ls -t $LOG_DIR/nextcloud_backup*.log | tail -n +11 | xargs rm -f

    if [ $? -ne 0 ]; then
        echo "[$(date)] ERROR: Failed to clean up old log files." | tee -a "$LOG_FILE"
        exit 1
    fi
    echo "[$(date)] Old log files cleaned successfully." | tee -a "$LOG_FILE"

    # Clean up the Nextcloud export directory before starting
    echo "[$(date)] Cleaning up the Nextcloud export directory..." | tee -a "$LOG_FILE"
    sudo rm -rf -- "$NEXTCLOUD_EXPORT_DIR"/*
    if [ $? -ne 0 ]; then
        echo "[$(date)] ERROR: Failed to clean up the Nextcloud export directory." | tee -a "$LOG_FILE"
        exit 1
    fi
    sudo rm -rf -- "$LOCAL_TEMP_DIR"/*
    if [ $? -ne 0 ]; then
       echo "[$(date)] ERROR: Failed to clean up the Temporary Compress export directory." | tee -a "$LOG_FILE"
        exit 1
    fi
    echo "[$(date)] Nextcloud export directories cleaned successfully." | tee -a "$LOG_FILE"

    # Perform full export of config and database using Snap export
    echo "[$(date)] Starting full export of Nextcloud configuration and database..." | tee -a "$LOG_FILE"
    sudo nextcloud.export -abc > /dev/null 2>&1

    if [ $? -ne 0 ]; then
        echo "[$(date)] ERROR: Full export of Nextcloud configuration and database failed." | tee -a "$LOG_FILE"
        exit 1
    fi
    echo "[$(date)] Export completed successfully." | tee -a "$LOG_FILE"

    # Compress the exported config and database
    echo "[$(date)] Compressing exported configuration and database..." | tee -a "$LOG_FILE"
    tar -czf "$CONFIG_DB_ARCHIVE" -C "$NEXTCLOUD_EXPORT_DIR" .

    if [ $? -ne 0 ]; then
        echo "[$(date)] ERROR: Compression of configuration and database export failed." | tee -a "$LOG_FILE"
        exit 1
    fi

    # Transfer the compressed config and database archive to Synology NAS
    echo "[$(date)] Transferring compressed configuration and database to Synology NAS..." | tee -a "$LOG_FILE"
    rsync -a -e "ssh -i ~/.ssh/rsync_key" "$CONFIG_DB_ARCHIVE" "$NAS_USER@$NAS_HOST:$NAS_BACKUP_DIR/"

    if [ $? -ne 0 ]; then
        echo "[$(date)] ERROR: Transfer of configuration and database to Synology NAS failed." | tee -a "$LOG_FILE"
        exit 1
    fi

    # Sync the data directory directly to Synology NAS
    echo "[$(date)] Syncing data directory to Synology NAS..." | tee -a "$LOG_FILE"
    rsync -a -e "ssh -i ~/.ssh/rsync_key" --delete "$DATA_DIR/" "$NAS_USER@$NAS_HOST:$NAS_BACKUP_DIR/data/"

    if [ $? -ne 0 ]; then
        echo "[$(date)] ERROR: Sync of data directory to Synology NAS failed." | tee -a "$LOG_FILE"
        exit 1
    fi

    # Remove temporary local files to minimize space usage
    echo "[$(date)] Cleaning up local temporary files..." | tee -a "$LOG_FILE"
    rm -rf "$CONFIG_DB_ARCHIVE" "$LOCAL_TEMP_DIR"/*

    if [ $? -ne 0 ]; then
        echo "[$(date)] ERROR: Failed to clean up local temporary files." | tee -a "$LOG_FILE"
        exit 1
    fi

    # Rotate backups on the Synology NAS to keep only the latest $MAX_BACKUPS
    echo "[$(date)] Rotating backups on Synology NAS..." | tee -a "$LOG_FILE"
    ssh "$NAS_USER@$NAS_HOST" "ls -t $NAS_BACKUP_DIR | tail -n +$(($MAX_BACKUPS + 1)) | xargs -I {} rm -rf "$NAS_BACKUP_DIR/{}""

    if [ $? -ne 0 ]; then
        echo "[$(date)] ERROR: Backup rotation on Synology NAS failed." | tee -a "$LOG_FILE"
        exit 1
    fi

    echo "[$(date)] Backup process completed successfully." | tee -a "$LOG_FILE"
    exit 0