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May 2024
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Mysql backup using samba

#!/bin/bash

        # This script creates a copy of the /opt/zimbra folder and then compress
        # it localy before sending it over the nework so make sure there is enough space
        # left on your local hard drive ($parentfold variable).

        # A samba share is used in this script, fill the ## NETWORKING ## section
        # and the $pathfold variable with your info.

        # sendEmail is used in this script, if you wish to use it, fill the ## MAILING ## section
        # with your info.

dateformat=$(date +\%d-\%m-\%Y)        # Format of the date used in the script.
datebegin=$(date)            # Date when the backup begins its routine.
beginjob=$(date +%s)            # Second at which the routine starts.
remotename=mremote            # Name of the temporary local folder where to mount the Samba share.
pathfold=//PATH/TO/SHARE/MYSQL        # Network folder for the backup; **folder must exist remotely**.
parentfold=/tmp                # Where it all begins.
basefold=$parentfold/.mysql        # Local parent folder created for the script usage.
remotefold=$basefold/$remotename    # Path of local folder to mount the remote Samba share.
muser=root                # User that launch the backup routine (root).
mpass='ROOT-PASSWORD'            # Password of the user that launch the backup routine.
mserver='localhost'            # Mysql server being backed up.
bakname=mysql_$dateformat.bak.db.sql    # Actual backup name.
archname=mysql_$dateformat.tgz        # Archive name that will be created.
logpath=$basefold/            # Log file path.
logfile=mysql_backup_LOGS_$dateformat.txt    # Log file name.
logging=$parentfold/$logfile        # Complete log path.
returns=''                # Simple line return for the logs.
mysqlv=$(mysql -V)            # MySQL version
uname=$(uname -a)            # Kernel version
lsb=$(lsb_release -d | cut -f2)        # OS version

## INFO ##

echo "========================================================
MySql Backup Summary - $(date +%d-%m-%Y)
========================================================
$returns" > $logging

# Declaring mysql server version.
echo "MySQL version:
---------------
$mysqlv
$returns" >> $logging

# Declaring Operating System version.
echo "Operating system version:
--------------------------
$lsb
$returns
Kernel version:
----------------
$uname
$returns" >> $logging

echo "** The backup job started on: $datebegin.
$returns
* Initializing...
" >> $logging

## LOCAL WORKING FOLDER ##

# Creating the backup structure.
echo '* Creating the temporary directory structure for the backup...' >> $logging
if [ ! -d "$remotefold" ]; then
        mkdir -p $remotefold
        echo " - Successfully created the local working directory under $remotefold." >> $logging
else
        echo " - Directory $remotefold exist, attempting to continue." >> $logging
fi

## NETWORKING ##

# Mounting the network folder where the backup will be sent.
echo $returns >> $logging
echo '* Attempting to Mount the Network Backup Folder...' >> $logging
mount -t cifs $pathfold $remotefold -o user='USERNAME',pass='PASSWORD',domain='WORKGROUP' >> $logging

if [ $? -eq 0 ]; then
        echo " - Remote path $pathfold successfully mounted." >> $logging
else
        echo " - Error encountered while mounting remote path $pathfold." >> $logging

# Creating a subfolder with the date as name on the remote foler.
cd $remotefold
#mkdir $dateformat

if [ ! -d "$dateformat" ]; then
        mkdir $dateformat
        echo " - Successfully created a subfolder called $dateformat in the remote folder"  >> $logging
else
        echo " - Could not create a sub-directory called $dateformat as it already exists, continuing...." >> $logging
fi

## MYSQL Backup ##

# Backup command
echo $returns >> $logging
echo '* Taking the backup of ALL databases...' >> $logging
cd $basefold
mysqldump -u $muser -h $mserver --password="$mpass" --all-databases > $bakname

if [ $? -eq 0 ]; then
        echo " - Successful dump of ALL databases in $basefold as $bakname." >> $logging
else
        echo " - Mysqldump task encountered an error, please review your server logs." >> $logging
fi

rawsize=$(du -sh $bakname | cut -f1)

## COMPRESSION ##

# Compressing the backup into a tar.gz archive
echo $returns >> $logging
echo '* Compressing the backup into a .tgz archive...' >> $logging
tar cfz $archname $bakname > /dev/null 2>&1

if [ $? -eq 0 ]; then
        echo " - Successfully compressed the backup as $archname." >> $logging
else
        echo " - Compression task encountered an error, please review your server logs." >> $logging
fi

# Calculating the size of the backup once compressed.
compsize=$(du -sh $archname | cut -f1)

## REMOTE COPY ##

# Copying the MySql backup archive from the local backup folder to the remote backup folder.
echo $returns >> $logging
echo "* Copying the Backup to the Network folder..." >> $logging
cd $basefold
cp $archname $remotefold/$dateformat
cd ~

if [ $? -eq 0 ]; then
        echo " - Backup successfully transfered to $pathfold/$dateformat." >> $logging
else
        echo " - Error encountered while transfering the backup, review your server logs." >> $logging
fi

## VERIFICATION ##

# Checking that the MySql service is still running.
chkserv=$(ps aux | grep /usr/sbin/mysqld | grep -v grep)
echo "
* Querying the MySql service to ensure it is running...
$chkserv
$returns" >> $logging

echo "Native database(s) size: $rawsize
Compressed database(s) size: $compsize
$returns" >> $logging

# Ending  stopwatch, calculating time difference and announcing it.
dateend=$(date)
echo "** The backup job ended on: $dateend.
$returns" >> $logging

endjob=$(date +%s)
elapsed=$(( $endjob - $beginjob ))
hours=$(( $elapsed / 3600 ))
elapsed=$(( $elapsed - $hours * 3600 ))
minutes=$(( $elapsed / 60 ))
seconds=$(( $elapsed - $minutes * 60 ))

echo "The backup routine took: $hours hours $minutes minutes $seconds seconds to complete.
$returns" >> $logging

wpath=$(echo $pathfold | sed -e 's/\//\\/g')
echo "A copy of the present log can be found along with the backup at:
Linux:          smb:$pathfold
Windows:        $wpath" >> $logging
echo "$returns
$returns
Backup routine completed.
" >> $logging

## MAILING ##

# Once completed, the log can be emailed easily by installing the sendEmail package. Comment out the next line
# if you do not want to use sendEmail or change information accordingly.
esender=mysql-backups@testdomain.com
erecipient=admin@testdomain.com
esubject='MySQL backup logs'
ebody='This is the Backup Log of the MySQL server. Please review the attached document for detailed information.'

sendemail -q -f $esender -t $erecipient -u $esubject -m $ebody -a $logging

# Copying the logs over the network folder.
cp $logging $remotefold/$dateformat

# Unmount the remote backup folder.
umount $remotefold

## CLEANING AND EXITING ##

# Cleaning the server of the backup files/folders we created.
rm -rf $basefold
rm $logging

exit

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