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| 1 | #!/bin/bash | |
| 2 | # | |
| 3 | # --------------------------- | |
| 4 | # Snapshot - Rollback - Btrfs | |
| 5 | # --------------------------- | |
| 6 | # | |
| 7 | # readonly-Snapshot + inkrementelles Backup von /home auf eine externe verschlüsselte USB-Backup-Festplatte | |
| 8 | # | |
| 9 | declare -i fertig=0 | |
| 10 | - | [[ -z "$1" ]] && . ../backup_all_to_local_USB-Drive.conf 2>/dev/null |
| 10 | + | |
| 11 | MAXBACKUPFILES=23 | |
| 12 | RemoteCryptPartition='/dev/disk/by-id/usb-WD_My_Passport_25EA_595832314131384C4A527034-0:0-part1' | |
| 13 | RemoteCryptDeviceTarget=backupdrive | |
| 14 | RemoteBackupDrive="/dev/disk/by-id/dm-uuid-CRYPT-LUKS2-8bcd8784c8c04d294d6e064268723d3a-${RemoteCryptDeviceTarget}"
| |
| 15 | RemoteBackupMountpoint=/backup | |
| 16 | remoteSubvolume=@LENOVO_T61_xxxx | |
| 17 | # | |
| 18 | ZuSicherndesVerzeichnis=/home | |
| 19 | RemoteBackupFolder=${RemoteBackupMountpoint}/home_backups
| |
| 20 | RemotehomeBackupName=home_backup_RO | |
| 21 | remotehomebackup=${RemoteBackupFolder}/${RemotehomeBackupName}
| |
| 22 | remoteNEWhomebackup=${RemoteBackupFolder}/NEW_${RemotehomeBackupName}
| |
| 23 | LocalhomeBackupName=${RemotehomeBackupName}
| |
| 24 | localhomebackup=/home/.home_snapshots/${LocalhomeBackupName}
| |
| 25 | localNEWhomebackup=/home/.home_snapshots/NEW_${LocalhomeBackupName}
| |
| 26 | ScriptName=`basename $0` | |
| 27 | # | |
| 28 | # | |
| 29 | #==== Funktionen ================================================================================================================================================ | |
| 30 | function UnmountCryptedDevice {
| |
| 31 | umount ${RemoteBackupDrive}
| |
| 32 | cryptsetup luksClose ${RemoteCryptDeviceTarget}
| |
| 33 | } | |
| 34 | # | |
| 35 | [ -f /root/${ScriptName}.tmp ] && rm /root/${ScriptName}.tmp
| |
| 36 | touch /root/${ScriptName}.tmp
| |
| 37 | if [ ! -f /root/${ScriptName}.tmp ] ; then
| |
| 38 | echo "" | |
| 39 | echo "Abbruch, keine root-rechte !" | |
| 40 | echo 'Bitte dieses Script mit "sudo" oder als user "root" ausführen !' | |
| 41 | exit 1 | |
| 42 | fi | |
| 43 | rm /root/${ScriptName}.tmp
| |
| 44 | # | |
| 45 | if [ ! -e ${RemoteCryptPartition} ] ; then
| |
| 46 | echo "" | |
| 47 | echo "Abbruch, keine USB-Backup-Festplatte angeschlossen !" | |
| 48 | exit 1 | |
| 49 | fi | |
| 50 | # | |
| 51 | if [ ! -e /dev/mapper/${RemoteCryptDeviceTarget} ]
| |
| 52 | then | |
| 53 | cryptsetup luksOpen ${RemoteCryptPartition} ${RemoteCryptDeviceTarget}
| |
| 54 | mount -o rw,noatime,compress=lzo,space_cache=v2,subvol=${remoteSubvolume} ${RemoteBackupDrive} ${RemoteBackupMountpoint}
| |
| 55 | elif grep "/dev/mapper/${RemoteCryptDeviceTarget} ${RemoteBackupMountpoint} btrfs rw" /proc/mounts
| |
| 56 | then | |
| 57 | sleep 0 | |
| 58 | else | |
| 59 | mount -o rw,noatime,compress=lzo,space_cache=v2,subvol=${remoteSubvolume} ${RemoteBackupDrive} ${RemoteBackupMountpoint}
| |
| 60 | fi | |
| 61 | # | |
| 62 | if [ -f /tmp/timestamp.txt ] | |
| 63 | then | |
| 64 | TIMESTAMP=`cat /tmp/timestamp.txt` | |
| 65 | else | |
| 66 | TIMESTAMP=`ls -l --time-style=+%Y-%m-%d-%H%M ${RemoteBackupFolder} | grep -w "NEW_${RemotehomeBackupName}" | awk {'print $6'}`
| |
| 67 | fi | |
| 68 | # | |
| 69 | mountstate=`grep "/dev/mapper/${RemoteCryptDeviceTarget} ${RemoteBackupMountpoint} btrfs rw" /proc/mounts`
| |
| 70 | if [[ -z "${mountstate}" ]]
| |
| 71 | then | |
| 72 | echo "" | |
| 73 | echo $mountstate | |
| 74 | echo "BTRFS-Backup-Datentraeger ist nicht eingebunden !" | |
| 75 | echo "ENDE !" | |
| 76 | UnmountCryptedDevice | |
| 77 | exit 1 | |
| 78 | else | |
| 79 | # echo "mountstate: $mountstate" | |
| 80 | if [ ! -d $localhomebackup ] && [ $fertig -eq 0 ] | |
| 81 | then | |
| 82 | echo "localhomebackup fehlt - vollständiges Backup wird ausgeführt !" | |
| 83 | btrfs subvolume snapshot -r ${ZuSicherndesVerzeichnis} $localhomebackup
| |
| 84 | if [ -d $remotehomebackup ] ; then | |
| 85 | [ -d ${RemoteBackupFolder}/${TIMESTAMP}_${RemotehomeBackupName} ] && btrfs subvolume delete ${RemoteBackupFolder}/${TIMESTAMP}_${RemotehomeBackupName}
| |
| 86 | mv $remotehomebackup ${RemoteBackupFolder}/${TIMESTAMP}_${RemotehomeBackupName}
| |
| 87 | fi | |
| 88 | [ -d $localNEWhomebackup ] && btrfs subvolume delete $localNEWhomebackup | |
| 89 | [ -d $remoteNEWhomebackup ] && btrfs subvolume delete $remoteNEWhomebackup | |
| 90 | btrfs send $localhomebackup | btrfs receive ${RemoteBackupFolder}
| |
| 91 | btrfs subvolume snapshot -r ${ZuSicherndesVerzeichnis} $localNEWhomebackup
| |
| 92 | fertig=1 | |
| 93 | elif [ ! -d $remotehomebackup ] && [ $fertig -eq 0 ] | |
| 94 | then | |
| 95 | echo "remotehomebackup fehlt - vollständiges Backup wird ausgeführt !" | |
| 96 | [ -d $localhomebackup ] && btrfs subvolume delete $localhomebackup | |
| 97 | btrfs subvolume snapshot -r ${ZuSicherndesVerzeichnis} $localhomebackup
| |
| 98 | [ -d $localNEWhomebackup ] && btrfs subvolume delete $localNEWhomebackup | |
| 99 | [ -d $remoteNEWhomebackup ] && btrfs subvolume delete $remoteNEWhomebackup | |
| 100 | btrfs send $localhomebackup | btrfs receive ${RemoteBackupFolder}
| |
| 101 | btrfs subvolume snapshot -r ${ZuSicherndesVerzeichnis} $localNEWhomebackup
| |
| 102 | fertig=1 | |
| 103 | elif [ ! -d $localNEWhomebackup ] && [ $fertig -eq 0 ] | |
| 104 | then | |
| 105 | echo "localNEWhomebackup fehlt und wird erneuert - inkrementelles Backup wird versucht !" | |
| 106 | [ -d $remoteNEWhomebackup ] && btrfs subvolume delete $remoteNEWhomebackup | |
| 107 | btrfs subvolume snapshot -r ${ZuSicherndesVerzeichnis} $localNEWhomebackup
| |
| 108 | fertig=1 | |
| 109 | elif [ -d $localhomebackup ] && [ -d $localNEWhomebackup ] && [ -d $remotehomebackup ] && [ ! -d $remoteNEWhomebackup ] && [ $fertig -eq 0 ] | |
| 110 | then | |
| 111 | echo "remoteNEWhomebackup fehlt - inkrementelles Backup wird versucht !" | |
| 112 | btrfs send -p $localhomebackup $localNEWhomebackup | btrfs receive ${RemoteBackupFolder}
| |
| 113 | if [ "$?" = "0" ] | |
| 114 | then | |
| 115 | fertig=2 | |
| 116 | else | |
| 117 | echo "inkrementelles Backup fehlgeschlagen - vollständiges Backup wird ausgeführt !" | |
| 118 | [ -d $localhomebackup ] && btrfs subvolume delete $localhomebackup | |
| 119 | btrfs subvolume snapshot -r ${ZuSicherndesVerzeichnis} $localhomebackup
| |
| 120 | if [ -d $remotehomebackup ] ; then | |
| 121 | [ -d ${RemoteBackupFolder}/${TIMESTAMP}_${RemotehomeBackupName} ] && btrfs subvolume delete ${RemoteBackupFolder}/${TIMESTAMP}_${RemotehomeBackupName}
| |
| 122 | mv $remotehomebackup ${RemoteBackupFolder}/${TIMESTAMP}_${RemotehomeBackupName}
| |
| 123 | fi | |
| 124 | [ -d $localNEWhomebackup ] && btrfs subvolume delete $localNEWhomebackup | |
| 125 | [ -d $remoteNEWhomebackup ] && btrfs subvolume delete $remoteNEWhomebackup | |
| 126 | btrfs send $localhomebackup | btrfs receive ${RemoteBackupFolder}
| |
| 127 | btrfs subvolume snapshot -r ${ZuSicherndesVerzeichnis} $localNEWhomebackup
| |
| 128 | fertig=1 | |
| 129 | fi | |
| 130 | elif [ -d $localhomebackup ] && [ -d $localNEWhomebackup ] && [ -d $remotehomebackup ] && [ -d $remoteNEWhomebackup ] && [ $fertig -eq 0 ] | |
| 131 | then | |
| 132 | echo "normales inkrementelles Backup" | |
| 133 | btrfs subvolume delete $localhomebackup | |
| 134 | mv $localNEWhomebackup $localhomebackup | |
| 135 | [ -d ${RemoteBackupFolder}/${TIMESTAMP}_${RemotehomeBackupName} ] && btrfs subvolume delete ${RemoteBackupFolder}/${TIMESTAMP}_${RemotehomeBackupName}
| |
| 136 | mv $remotehomebackup ${RemoteBackupFolder}/${TIMESTAMP}_${RemotehomeBackupName}
| |
| 137 | mv $remoteNEWhomebackup $remotehomebackup | |
| 138 | btrfs subvolume snapshot -r ${ZuSicherndesVerzeichnis} $localNEWhomebackup
| |
| 139 | fertig=1 | |
| 140 | fi | |
| 141 | fi | |
| 142 | # | |
| 143 | [ $fertig -ne 2 ] && btrfs send -p $localhomebackup $localNEWhomebackup | btrfs receive ${RemoteBackupFolder}
| |
| 144 | sync | |
| 145 | # | |
| 146 | typeset -i FILECOUNT | |
| 147 | FILECOUNT=0 | |
| 148 | for file in `ls -r ${RemoteBackupFolder}` ; do
| |
| 149 | FILECOUNT=$FILECOUNT+1 | |
| 150 | [ $FILECOUNT -le $MAXBACKUPFILES ] && continue | |
| 151 | [ "$file" = "${RemotehomeBackupName}" ] && continue
| |
| 152 | [ "$file" = "NEW_${RemotehomeBackupName}" ] && continue
| |
| 153 | btrfs subvolume delete ${RemoteBackupFolder}/${file}
| |
| 154 | echo "deleting snapshot ${RemoteBackupFolder}/${file}"
| |
| 155 | done | |
| 156 | # | |
| 157 | btrfs balance start -dusage=5 /btrfs | |
| 158 | btrfs balance start -dusage=5 ${RemoteBackupMountpoint}
| |
| 159 |
