LTO-Backup-script

backups your data to a multiple LTO tapes while they are encrypted and compressed.

SETUP

change the config file for your needs in the head of the start script Keep in mind to install the following software applications:

 ###############################
 # nas backup connections
 NAS=nas
 NAS_IP=192.168.178.10
 MOUNT_NFS="$NAS_IP:pool0"
 MOUNT_LOCAL="/data/pool0"

 ###############################
 # mail options
 MAIL_PREFRACE="[nas-backup]"

 ###############################
 # Backup dirs; relative from Mount or full path
 NAS_MOUNT_DIR=$PWD/nasmount
 BACKUP_DIRS="homes photo docs docker cloud video /etc"
 KEYFILE="$PWD/key.txt"

 ###############################
 # Backup Log folder
 LOGBASE=$PWD/backup.log
 LOGFILE=$LOGBASE/$NOW.backup.log
 FILELIST=$LOGBASE/$NOW.tar.list
 TAPENAMES=$LOGBASE/$NOW.backup.tapenames.txt

 ###############################
 # Tape devie name
 TAPE="/dev/st0"
 TAPESIZE="400*1000*1000*1000"
 TAPESPEED="70*1000*1000"
 BLOCKSIZE="512K"

 ###############################
 # Tar options
 TAR_ARGS="-b 1024"
 TAPE_BUFF="3g"

 ###############################
 #compression
 # please add the pipe in order to also diable this compression completely
 #COMPRESSION_CMD="pigz -3 -p 32 "
 #DECOMPRESSION_CMD="pigz -dc -3 -p 32"
 COMPRESSION_CMD="zstd -3"
 DECOMPRESSION_CMD="zstd -3 -d"

 ###############################
 # Path to binaries
 TAR=/bin/tar
 MT=/usr/bin/mt-st
 MKDIR=/bin/mkdir
 MBUFFER=/usr/bin/mbuffer
 OPENSSL=/usr/bin/openssl
 PIPEMETER=/usr/bin/pipemeter
 COMPRESSION=/usr/bin/zstd
 UUENCODE=/usr/bin/uuencode

Encrytion setup

For encryption aes-256-cbc is used. In order for this to work you have to generate a key.txt file next to the start script. I prefer openssl to generate one for me

openssl rand 512 > $KEYFILE

email setup

In oder to receive emails postfix has to be configured in the way that your emails get forwarded from root to a real email address.

you can test this if you received an email with the following command

echo "foo" | mail root --subject="test"

If this works and you did receive an email you should also receive a email via this script.

Usage

full backup

For a full backup just run the script like this:

sudo start backup-full

Tape number estimation

For estimation of time and number of tapes needed for your backup you can execute the estimation.

sudo start estimate-tapes

Tape print content

If you have a backup and you want to get the content of this tapes you can execute this command:

sudo start tape-list

You will be asked what number tapes your backup is utilizing.

Tape restore content

If you want to recover some or all of the files you can use this command.

for a special file

sudo start recover-data <output dir> <a special file>

or for all files

sudo start recover-data <output dir>

You will be asked what number tapes your backup is utilizing.