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backup.sh
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backup.sh
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#!/bin/bash
#
#Virtualbox backup script
#
# Author
# |
# +-- Miguel Almeida (ITClinical)
#
# Last modified
# |
# +-- 19-07-2011
#
# Version
# |
# +-- 0.0.1
# ------------- system commands used by this script --------------------
ID=/usr/bin/id;
ECHO=/bin/echo;
MOUNT=/bin/mount;
RM=/bin/rm;
MV=/bin/mv;
CP=/bin/cp;
MKDIR=/bin/mkdir
SUDO='sudo -H -u'
start_time=$(date '+%s')
dayofweek=$(date '+%u')
#Things to configure:
USERNAME=youruser
vdipath='/path/to/VirtualBox VMs'
backupPath=/path/to/backup/auto
current_log=$backupPath/current.log
touch $current_log
setWeekNumber(){
if [ "$week" != "" ] ; then
previousWeek=$week
else
previousWeek="week0"
fi
day_num=$(date +%d)
day_num=$((10#$day_num))
if (( $day_num <= 7 )); then
week="week1"
elif (( $day_num > 7 && $day_num <= 14 )); then
week="week2"
elif (( $day_num > 14 && $day_num <= 21 )); then
week="week3"
elif (( $day_num > 21 && $day_num <= 28 )); then
week="week4"
elif (( $day_num > 28 )); then
week="week5"
fi
printf '%s (%s): Week number was set to %s \n' "$(date '+%Y-%m-%d %H:%M')" $virtualmachine $week >> $current_log
echo $week > $currentweekfile
}
moveWeekSnapshots(){
if [ "$week" = "week2" ] ; then
$CP -al $backupPath/$virtualmachine/week1/Snapshots/* $backupPath/$virtualmachine/$week/Snapshots;
elif [ "$week" = "week3" ] ; then
$CP -al $backupPath/$virtualmachine/week2/Snapshots/* $backupPath/$virtualmachine/$week/Snapshots;
elif [ "$week" = "week4" ] ; then
$CP -al $backupPath/$virtualmachine/week3/Snapshots/* $backupPath/$virtualmachine/$week/Snapshots;
elif [ "$week" = "week5" ] ; then
$CP -al $backupPath/$virtualmachine/week4/Snapshots/* $backupPath/$virtualmachine/$week/Snapshots;
fi
printf '%s (%s): Made weekly snapshots hardlink \n' "$(date '+%Y-%m-%d %H:%M')" $virtualmachine >> $current_log
}
copyBaseFiles(){
printf '%s (%s): Copying base files: moving monthly \n' "$(date '+%Y-%m-%d %H:%M')" $virtualmachine >> $current_log
# step 1: delete the oldest snapshot, if it exists:
if [ -d $backupPath/$virtualmachine/monthly.2 ] ; then \
$RM -rf $backupPath/$virtualmachine/monthly.2 ; \
fi ;
# step 2: shift the middle snapshots(s) back by one, if they exist
if [ -d $backupPath/$virtualmachine/monthly.1 ] ; then \
$MV $backupPath/$virtualmachine/monthly.1 $backupPath/$virtualmachine/monthly.2 ; \
fi;
if [ -d $backupPath/$virtualmachine/monthly.0 ] ; then \
$CP -al $backupPath/$virtualmachine/monthly.0 $backupPath/$virtualmachine/monthly.1; \
fi;
# step 3: Rsync the virtual machine to monthly.0
printf '%s (%s): Rsync the virtual machine to monthly.0 \n' "$(date '+%Y-%m-%d %H:%M')" $virtualmachine >> $current_log
if [[ -d $vdipath/$virtualmachine/ ]] ; then \
monthlyCopy
fi;
}
monthlyCopy(){
rsync -va --delete "$vdipath/$virtualmachine/" $backupPath/$virtualmachine/monthly.0
printf '%s (%s): Finished monthly rsync to backup \n' "$(date '+%Y-%m-%d %H:%M')" $virtualmachine >> $current_log ; \
}
dailyCopy(){
rsync -va --delete "$vdipath/$virtualmachine/Snapshots" $backupPath/$virtualmachine/$week
rsync -va "$vdipath/$virtualmachine/$virtualmachine.vbox" $backupPath/$virtualmachine/$week
printf '%s (%s): Finished daily copy to %s \n' "$(date '+%Y-%m-%d %H:%M')" $virtualmachine $backupPath/$virtualmachine/$week >> $current_log ; \
}
weeklyCopy(){
moveWeekSnapshots
rsync -va --delete "$vdipath/$virtualmachine/Snapshots" $backupPath/$virtualmachine/$1
rsync -va "$vdipath/$virtualmachine/$virtualmachine.vbox" $backupPath/$virtualmachine/$1
printf '%s (%s): Finished weekly copy to %s \n' "$(date '+%Y-%m-%d %H:%M')" $virtualmachine $backupPath/$virtualmachine/$1 >> $current_log ; \
}
dailySnapshot(){
snapshotLogger "daily" $dayofweek
$SUDO $USERNAME vboxmanage snapshot $virtualmachine take snapshot-$dayofweek --pause
# touch $vdipath/$virtualmachine/Snapshots/snapshot-$dayofweek
printf '%s (%s): Daily snapshot-%s created \n' "$(date '+%Y-%m-%d %H:%M')" $virtualmachine $dayofweek >> $current_log
}
weeklySnapshot(){
snapshotLogger "week" $1
$SUDO $USERNAME vboxmanage snapshot $virtualmachine take snapshot-$1 --pause
# touch $vdipath/$virtualmachine/Snapshots/snapshot-$week
printf '%s (%s): Weekly snapshot created for week %s \n' "$(date '+%Y-%m-%d %H:%M')" $virtualmachine $1 >> $current_log
}
snapshotDelete(){
type=$1;
linecnt=0;
while read -r line; do
((linecnt++))
array[$linecnt]="${line#*=\"}"
array[$linecnt]="${array[$linecnt]%\"}"
done < <($SUDO $USERNAME vboxmanage snapshot $virtualmachine list --machinereadable | grep "SnapshotName=*")
# use for loop to reverse the array
for (( j = $linecnt ; j > 0; j-- ));
do
if [[ ${array[$j]} =~ "week" && $type == "weekly" || ! ${array[$j]} =~ "week" && $type == "daily" ]]; then
$SUDO $USERNAME vboxmanage snapshot $virtualmachine delete ${array[$j]}
printf '%s (%s): Deleted snapshot %s \n' "$(date '+%Y-%m-%d %H:%M')" $virtualmachine ${array[$j]} >> $current_log
fi
done
}
snapshotLogger(){
printf '%s (%s) Logging message to host \n' "$(date '+%Y-%m-%d %H:%M')" $virtualmachine >> $current_log
}
createDirectories(){
$MKDIR -p $backupPath/$virtualmachine/week0/Snapshots/
$MKDIR -p $backupPath/$virtualmachine/week1/Snapshots/
$MKDIR -p $backupPath/$virtualmachine/week2/Snapshots/
$MKDIR -p $backupPath/$virtualmachine/week3/Snapshots/
$MKDIR -p $backupPath/$virtualmachine/week4/Snapshots/
}
backup(){
# Find which week of the month 1-5 it is.
#If the week hasn't been defined yet, define it and take the weekly snapshot
touch $currentweekfile
week=$(cat $currentweekfile)
firstRun=false
if [ "$week" = "" ] ; then
printf '%s Week not defined. Setting firstRun to true \n' "$(date '+%Y-%m-%d %H:%M')" >> $current_log
firstRun=true
setWeekNumber
copyBaseFiles
createDirectories
weeklySnapshot "week0"
fi
if [ "$dayofweek" = "7" ] ; then
#Sunday:
# 1) delete daily
# 2) Create weekly
# 3) Backup transfer
printf '%s: Deleting daily snapshots. Will keep weekly one \n' "$(date '+%Y-%m-%d %H:%M')" >> $current_log
snapshotDelete "daily"
if [ "$firstRun" = false ] ; then
weeklySnapshot $week
setWeekNumber
fi
weeklyCopy $previousWeek
#First sunday of the month: backup base
if [ "$week" = "week1" -a "$firstRun" = false ] ; then
snapshotDelete "weekly"
copyBaseFiles
weeklySnapshot "week0"
fi
else
dailySnapshot
dailyCopy
fi
}
##Running the script
FILE=$backupPath/backup.cfg
while read CMD; do
virtualmachine=$CMD
currentweekfile=$backupPath/$virtualmachine/currentweek
backup
done < "$FILE"