FreeBSD下的ZFS备份脚本

这个脚本使用ZFS快照进行增量备份，并可以将备份存储在多个远程服务器中。它可以保证数据的完整性，并具有自动化清理功能，以节省存储空间。

#!/bin/sh

    # 设置变量
    ZPOOL_POOL="tank"
    ZFS_DATA_SETS=$(zfs list -H -o name -r $ZPOOL_POOL)
    ZFS_SNAP_PREFIX="backup-$(hostname)-"
    ZFS_SNAP_DATE_FMT="%Y-%m-%d_%H:%M:%S"

    REMOTE_SERVERS="backup1.example.com backup2.example.com"
    REMOTE_USER="backupuser"
    REMOTE_PATH="/backups"

    DAYS_TO_KEEP=7
    WEEKS_TO_KEEP=4

    # 创建快照并发送到远程服务器
    for data_set in $ZFS_DATA_SETS; do
        snap_name="${ZFS_SNAP_PREFIX}$(date +${ZFS_SNAP_DATE_FMT})"
        zfs snapshot "$data_set@$snap_name"
        for server in $REMOTE_SERVERS; do
            zfs send "$data_set@$snap_name" | ssh "$REMOTE_USER@$server" "cat > $REMOTE_PATH/${data_set}.zfs.gz"
        done
    done

    # 清理旧的备份
    for server in $REMOTE_SERVERS; do
        ssh "$REMOTE_USER@$server" "cd $REMOTE_PATH && find . -mtime +$DAYS_TO_KEEP -type f -delete"
        ssh "$REMOTE_USER@$server" "cd $REMOTE_PATH && find . -mtime +$WEEKS_TO_KEEP -type f -name '*.gz' -delete"
    done

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