backup/backup.sh
2017-08-06 22:31:16 +02:00

164 lines
6.4 KiB
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Executable file

#!/bin/bash
## Create by Stefan Sterz <hi@sterzy.com> in 2017
## General Settings
SOURCES=(/root /etc /home /boot) # What folder should be saved?
TARGET="/home/sterzy/backup" # Where should they be saved? (absolute path!)
EXCLUDEFROM="" # What files are supposed to be excluded?
MAILADRESS="" # To which email adress should the logs be sent?
LISTPACKAGES="" # Change to non empty string to save a list of
# installed packages!
LOG=$0.log # Log file name & location
RSYNCCONF=(--delete) # Additional rsync flags
## SSH Settings
TOSSH="" # What ssh server stores the backups?
FROMSSH="" # From what ssh server should the files be
# backuped?
# For several reasons TOSSH and FROMSSH cannot
# be used at the same time!
TOSSHUSER="" # The ssh user of the system on which the
# backup will be created
TOSSHPORT=22 # The ssh port of the system on which the
# backup will be created
FROMSSHUSER="" # The ssh user of the system from which the
# files will be backed up
FROMSSHPORT=22 # The ssh port of the system from which the
# files will be backed up
## Command variables,
# These should be fine, but if something doesn't work these can be adjusted
MOUNT="/bin/mount"; FGREP="/bin/fgrep"; SSH="/usr/bin/ssh"
LN="/bin/ln"; ECHO="/bin/echo"; DATE="/bin/date"; MKDIR="/bin/mkdir"
DPKG="/usr/bin/dpkg"; AWK="/usr/bin/awk"; MAIL="/usr/bin/mail"
CUT="/usr/bin/cut"; TR="/usr/bin/tr"; RSYNC="/usr/bin/rsync"
## Helpers
LAST="last"; INC="--link-dest=$TARGET/$LAST"
# Format log information
function formatLog ()
{
while IFS= read -r line; do
printf "$($DATE):\t$line\n"
done
}
# Backup function
# Creates a backup of the folders provides by $SOURCES in $TARGET in the sub
# directory provided by the first parameter ($1)
function backup ()
{
$ECHO "Creating backup in \"$TOSSH:$TARGET$1\"..." 2>&1 | formatLog >> $LOG
if [ -n "$LISTPACKAGES" ] && [ -z "$FROMSSH" ]; then
$ECHO "$DPKG --get-selections | $AWK '!/deinstall|purge|hold/'|$CUT -f1 | $TR '\n' ' '" 2>&1 | formatLog >> $LOG
$DPKG --get-selections | $AWK '!/deinstall|purge|hold/'|$CUT -f1 |$TR '\n' ' ' 2>&1 | formatLog >> $LOG 2>&1
fi
# Create folders that don't exist
if [ -n "$S" ] && [ -n "$TOSSH" ] && [ -z "$FROMSSH" ]; then
$ECHO "$S $TOSSH $MKDIR -p $TARGET$1" 2>&1 | formatLog >> $LOG
$S $TOSSH "$MKDIR -p \"$TARGET\"$1" 2>&1 | formatLog >> $LOG 2>&1
if [ $? -ne 0 ]; then
ERROR=1
fi
elif ( [ -n "$S" ] && [ -n "$FROMSSH" ] && [ -z "$TOSSH" ] ) || ( [ -z "$S" ] ); then
$ECHO "$MKDIR -p $TARGET$1" 2>&1 | formatLog >> $LOG
$MKDIR -p "$TARGET"$1 2>&1 | formatLog >> $LOG 2>&1
if [ $? -ne 0 ]; then
ERROR=1
fi
fi
# Backup files
for SOURCE in "${SOURCES[@]}"
do
if [ -n "$S" ] && [ -n "$TOSSH" ] && [ -z "$FROMSSH" ]; then
$ECHO "$RSYNC -e \"$S\" -avR \"$SOURCE\" ${RSYNCCONF[@]} \"$TOSSH:$TARGET$1\" $INC --exclude-from=\"$EXCLUDEFROM\"" 2>&1 | formatLog >> $LOG
$RSYNC -e "$S" -avR "$SOURCE" "${RSYNCCONF[@]}" "$TOSSH:\"$TARGET\"$1" $INC --exclude-from="$EXCLUDEFROM" 2>&1 | formatLog >> $LOG 2>&1
if [ $? -ne 0 ]; then
ERROR=1
fi
elif [ -n "$S" ] && [ -z "$TOSSH" ] && [ -n "$FROMSSH" ]; then
$ECHO "$RSYNC -e \"$S\" -avR \"$FROMSSH:$SOURCE\" ${RSYNCCONF[@]} $TARGET$1 $INC --exclude-from=\"$EXCLUDEFROM\"" 2>&1 | formatLog >> $LOG
$RSYNC -e "$S" -avR "$FROMSSH:\"$SOURCE\"" "${RSYNCCONF[@]}" "$TARGET"$1 $INC --exclude-from="$EXCLUDEFROM" 2>&1 | formatLog >> $LOG 2>&1
if [ $? -ne 0 ]; then
ERROR=1
fi
elif [-z "$S"] && [ -z "$TOSSH" ] && [ -z "$FROMSSh" ]; then
$ECHO "$RSYNC -avR \"$SOURCE\" ${RSYNCCONF[@]} $TARGET$1 $INC --exclude-from=\"$EXCLUDEFROM\"" 2>&1 | formatLog >> $LOG
$RSYNC -avR "$SOURCE" "${RSYNCCONF[@]}" "$TARGET"$1 $INC --exclude-from="$EXCLUDEFROM" 2>&1 | formatLog >> $LOG 2>&1
if [ $? -ne 0 ]; then
ERROR=1
fi
fi
done
# Create a link to the latest backup
if [ -n "$S" ] && [ -n "$TOSSH" ] && [ -z "$FROMSSH" ]; then
$ECHO "$S $TOSSH $LN -nsf $TARGET$1 $TARGET$LAST" 2>&1 | formatLog >> $LOG
$S $TOSSH "$LN -nsf \"$TARGET\"$1 \"$TARGET\"$LAST" 2>&1 | formatLog >> $LOG 2>&1
if [ $? -ne 0 ]; then
ERROR=1
fi
elif ( [ -n "$S" ] && [ -n "$FROMSSH" ] && [ -z "$TOSSH" ] ) || ( [ -z "$S" ] ); then
$ECHO "$LN -nsf $TARGET$1 $TARGET$LAST" 2>&1 | formatLog >> $LOG
$LN -nsf "$TARGET"$1 "$TARGET"$LAST 2>&1 | formatLog >> $LOG 2>&1
if [ $? -ne 0 ]; then
ERROR=1
fi
fi
$ECHO "Done creating backup in \"$TOSSH:$TARGET$1\"" 2>&1 | formatLog >> $LOG
}
# Clear log
$ECHO -n "" > $LOG
# Make sure the provided path is absolute
if [ "${TARGET:${#TARGET}-1:1}" != "/" ]; then
TARGET=$TARGET/
fi
# Handle SSH info
if [ -n "$TOSSH" ] && [ -z "$FROMSSH" ]; then
S="$SSH -p $TOSSHPORT -l $TOSSHUSER"
elif [ -z "$TOSSH" ] && [ -n "$FROMSSH" ]; then
S="$SSH -p $FROMSSHPORT -l $FROMSSHUSER"
elif [ -n "$TOSSH" ] && [ -n "$FROMSSH" ]; then
ERROR=1
$ECHO "Plese don't provide to and from ssh information!" 2>&1 | formatLog >> $LOG
$ECHO "No backup performed!" 2>&1 | formatLog >> $LOG
exit 1
fi
# Get date etc.
WEEKDAY=$($DATE +"%u") # %a = weekday as number
DAY=$($DATE +"%d") # %d = day in month as number
MONTH=$($DATE +%m) # %m = month as number
HOUR=$($DATE +"%H") # %H = hour as number
# Create a backup every first day in a month
if [[ $DAY = 01 ]]; then
backup "monthly/$MONTH-$($DATE +"%B")"
fi
# Create a special backup approx every week
if [[ $WEEKDAY = 7 ]]; then
let WEEK=$($DATE +"%W")%5 # save past 5 weeks
backup "weekly/$WEEK"
fi
# Create daily backups
backup "daily/$WEEKDAY-$($DATE +"%A")/$HOUR"
# Send email if an adress was provided
if [ -n "$MAILADRESS" ]; then
if [ $ERROR ]; then
$MAIL -s "[Backup] error occured during backup - $LOG" $MAILADRESS < $LOG
else
$MAIL -s "[Backup] backup created successfully - $LOG" $MAILADRESS < $LOG
fi
fi