Migration to Linux: Backup

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Toolauswahl

• Bordmittel Pikabackup: Eher sehr spartanisch
• rsync: Klingt nach Mittel der Wahl
  • Könnte man Versionierung mit rsync machen? Snapshots wie bei TimeMachine?
    • Ja:
      • https://github.com/rsnapshot/rsnapshot <- Overengineered? Why Perl?
      • https://www.howtoforge.com/rsync_incremental_snapshot_backups <- KISS!!
      • http://www.mikerubel.org/computers/rsync_snapshots/ <- KISS!!
• https://github.com/rdiff-backup/rdiff-backup#1-installation <- Overengineered? Why Python?
• https://software.opensuse.org/package/rdiff-backup
• https://www.maketecheasier.com/time-machine-alternatives-linux/
• https://alternativeto.net/software/time-machine/?platform=linux

Tests

• Déjà Dup
• Cronopete
• Back in Time
• Timeshift
• Restic
• Rsync and cp: This works actually pretty good!

Solution

#!/bin/bash
#set -x
#
# Author: Heiko
# Source: TBD
# Purpose: Create Timemachine-Like Backups (like snapshots)

# Globals
GFOLDERSOURCEROOT01="/home/heiko"
GFOLDERSOURCEROOT02="/etc"
GFOLDERSOURCEROOT03="/var/lib/libvirt"
GFOLDERSOURCEROOT04="/usr"
GFOLDERSOURCEROOT05="/run/media/heiko/f595f49a-f483-4e65-9559-aef130f2a1a6"
GFILEEXCLUDES="/home/heiko/bin/etc/backup_exclude.cfg"
GTARGETFILESYSTEMID="c9be69cb-32b9-4ef8-8f02-5d3926bc49c2"
GFOLDERTARGETMOUNTPOINT="`mount | grep run/media/heiko | grep "${GTARGETFILESYSTEMID}" | awk '{printf $3}'`"
if [ -z "${GFOLDERTARGETMOUNTPOINT}" ]; then
        echo "Target \"${GTARGETFILESYSTEMID}\" not found." 
        exit 1
fi
GFOLDERTARGETROOT="${GFOLDERTARGETMOUNTPOINT}/_Backups"
GFOLDERTARGETCURRENT=${GFOLDERTARGETROOT}/current
echo "Backup source root 01: ${GFOLDERSOURCEROOT01}"
echo "Backup source root 02: ${GFOLDERSOURCEROOT02}"
echo "Backup source root 03: ${GFOLDERSOURCEROOT03}"
echo "Backup source root 04: ${GFOLDERSOURCEROOT04}"
echo "Backup source root 05: ${GFOLDERSOURCEROOT05}"
echo "Backup target root   : ${GFOLDERTARGETROOT}"
GMAXAGEDAYS=60  # The number of days after which old backups will be deleted
date

# Check user
if [ "`whoami`" != "root" ]; then
        echo "Not running as root."
        echo "Bailing out. Bye."
        exit 1
fi

# Check target
if [ ! -d "${GFOLDERTARGETROOT}" ]; then
        echo "Target \"${GFOLDERTARGETROOT}\" seems to be invalid."
        echo "Bailing out. Bye."
        exit 1
fi

# If missing, create current folder
test ! -d "${GFOLDERTARGETCURRENT}" && mkdir "${GFOLDERTARGETCURRENT}"

# Create new target folder (w/ date)
GDATENOW="`date '+%Y-%m-%d_%H-%M-%S'`"
GFOLDERTARGETNOW="${GFOLDERTARGETROOT}/${GDATENOW}"
mkdir "${GFOLDERTARGETNOW}"
echo "Backup target for this run: ${GFOLDERTARGETNOW}"
echo "Continuing in 5 seconds...(CTRL-C to cancel)"
sleep 5
date

# RUN RSYNC INTO CURRENT
echo "Syncing to ${GFOLDERTARGETCURRENT}..."
if [ 23 -eq 23 ]; then
    rsync -aR --delete --delete-excluded --exclude-from="${GFILEEXCLUDES}" "${GFOLDERSOURCEROOT01}" "${GFOLDERSOURCEROOT02}" "${GFOLDERSOURCEROOT03}" "${GFOLDERSOURCEROOT04}" "${GFOLDERSOURCEROOT05}" "${GFOLDERTARGETCURRENT}"
fi
# Output date to see how long it took
if [ "$?" -ne 0 -a 23 -eq 42 ]; then
        echo "Sync failed. Bailing out. Try again!" # TODO: Might try some times until bailing out?
        exit "$?"
fi
echo "Syncing to ${GFOLDERTARGETCURRENT}...DONE"

# UPDATE THE MTIME TO REFLECT THE SNAPSHOT TIME
touch "${GFOLDERTARGETCURRENT}"

# MAKE HARDLINK COPY
date
echo "Copying to ${GFOLDERTARGETNOW}..."
cp -al "${GFOLDERTARGETCURRENT}"/* "${GFOLDERTARGETNOW}/"
echo "Copying to ${GFOLDERTARGETNOW}...DONE"

# REMOVE OLD BACKUPS #TODO also make this disk space related, keep as much as you can. delet only when necessary!
for FILE in "$( find "${GFOLDERTARGETROOT}" -maxdepth 1 -type d -mtime +${GMAXAGEDAYS} | grep -v current)"
do
#       $RM -Rf $FILE
   echo "NOT REMOVING $FILE - FIX ME!"
done

# Output date to see how long it took
date

# EOF