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Thread: Mysql Backup Edits
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10-18-2009, 11:58 AM #1Web Hosting Evangelist
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Mysql Backup Edits
hello,
im currently running the shell script below on my server to backup the databases every 6 hours (couple of fairly mission critical sites so need recent backups) via a cron job, the script works fine but i keep havign to login and delete old backups every week or two as the script just constantly add new ones, what edit could i make to just have the script leave say 2 days worth of backups per database (so 4 files) ?
Code:#!/bin/bash # Username to access the MySQL server e.g. dbuser USERNAME=**** # Username to access the MySQL server e.g. password PASSWORD=**** # Host name (or IP address) of MySQL server e.g localhost DBHOST=**** # List of DBNAMES for Daily/Weekly Backup e.g. "DB1 DB2 DB3" DBNAMES="all" # Backup directory location e.g /backups BACKUPDIR="/sqlback" # Mail setup # What would you like to be mailed to you? # - log : send only log file # - files : send log file and sql files as attachments (see docs) # - stdout : will simply output the log to the screen if run manually. # - quiet : Only send logs if an error occurs to the MAILADDR. MAILCONTENT="quiet" # Set the maximum allowed email size in k. (4000 = approx 5MB email [see docs]) MAXATTSIZE="4000" # Email Address to send mail to? (user@domain.com) MAILADDR="***" # ============================================================ # === ADVANCED OPTIONS ( Read the doc's below for details )=== #============================================================= # List of DBBNAMES for Monthly Backups. MDBNAMES="mysql $DBNAMES" # List of DBNAMES to EXLUCDE if DBNAMES are set to all (must be in " quotes) DBEXCLUDE="" # Include CREATE DATABASE in backup? CREATE_DATABASE=yes # Separate backup directory and file for each DB? (yes or no) SEPDIR=yes # Which day do you want weekly backups? (1 to 7 where 1 is Monday) DOWEEKLY=6 # Choose Compression type. (gzip or bzip2) COMP=gzip # Compress communications between backup server and MySQL server? COMMCOMP=no # Additionally keep a copy of the most recent backup in a seperate directory. LATEST=no # The maximum size of the buffer for client/server communication. e.g. 16MB (maximum is 1GB) MAX_ALLOWED_PACKET= # For connections to localhost. Sometimes the Unix socket file must be specified. SOCKET= # Command to run before backups (uncomment to use) #PREBACKUP="/etc/mysql-backup-pre" # Command run after backups (uncomment to use) #POSTBACKUP="/etc/mysql-backup-post" #===================================================================== PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/mysql/bin DATE=`date +%Y-%m-%d_%Hh%Mm` # Datestamp e.g 2002-09-21 DOW=`date +%A` # Day of the week e.g. Monday DNOW=`date +%u` # Day number of the week 1 to 7 where 1 represents Monday DOM=`date +%d` # Date of the Month e.g. 27 M=`date +%B` # Month e.g January W=`date +%V` # Week Number e.g 37 VER=2.5 # Version Number LOGFILE=$BACKUPDIR/$DBHOST-`date +%N`.log # Logfile Name LOGERR=$BACKUPDIR/ERRORS_$DBHOST-`date +%N`.log # Logfile Name BACKUPFILES="" OPT="--quote-names --opt" # OPT string for use with mysqldump ( see man mysqldump ) # Add --compress mysqldump option to $OPT if [ "$COMMCOMP" = "yes" ]; then OPT="$OPT --compress" fi # Add --compress mysqldump option to $OPT if [ "$MAX_ALLOWED_PACKET" ]; then OPT="$OPT --max_allowed_packet=$MAX_ALLOWED_PACKET" fi # Create required directories if [ ! -e "$BACKUPDIR" ] # Check Backup Directory exists. then mkdir -p "$BACKUPDIR" fi if [ ! -e "$BACKUPDIR/daily" ] # Check Daily Directory exists. then mkdir -p "$BACKUPDIR/daily" fi if [ ! -e "$BACKUPDIR/weekly" ] # Check Weekly Directory exists. then mkdir -p "$BACKUPDIR/weekly" fi if [ ! -e "$BACKUPDIR/monthly" ] # Check Monthly Directory exists. then mkdir -p "$BACKUPDIR/monthly" fi if [ "$LATEST" = "yes" ] then if [ ! -e "$BACKUPDIR/latest" ] # Check Latest Directory exists. then mkdir -p "$BACKUPDIR/latest" fi eval rm -fv "$BACKUPDIR/latest/*" fi # IO redirection for logging. touch $LOGFILE exec 6>&1 # Link file descriptor #6 with stdout. # Saves stdout. exec > $LOGFILE # stdout replaced with file $LOGFILE. touch $LOGERR exec 7>&2 # Link file descriptor #7 with stderr. # Saves stderr. exec 2> $LOGERR # stderr replaced with file $LOGERR. # Functions # Database dump function dbdump () { mysqldump --user=$USERNAME --password=$PASSWORD --host=$DBHOST $OPT $1 > $2 return 0 } # Compression function plus latest copy SUFFIX="" compression () { if [ "$COMP" = "gzip" ]; then gzip -f "$1" echo echo Backup Information for "$1" gzip -l "$1.gz" SUFFIX=".gz" elif [ "$COMP" = "bzip2" ]; then echo Compression information for "$1.bz2" bzip2 -f -v $1 2>&1 SUFFIX=".bz2" else echo "No compression option set, check advanced settings" fi if [ "$LATEST" = "yes" ]; then cp $1$SUFFIX "$BACKUPDIR/latest/" fi return 0 } # Run command before we begin if [ "$PREBACKUP" ] then echo ====================================================================== echo "Prebackup command output." echo eval $PREBACKUP echo echo ====================================================================== echo fi if [ "$SEPDIR" = "yes" ]; then # Check if CREATE DATABSE should be included in Dump if [ "$CREATE_DATABASE" = "no" ]; then OPT="$OPT --no-create-db" else OPT="$OPT --databases" fi else OPT="$OPT --databases" fi # Hostname for LOG information if [ "$DBHOST" = "localhost" ]; then HOST=`hostname` if [ "$SOCKET" ]; then OPT="$OPT --socket=$SOCKET" fi else HOST=$DBHOST fi # If backing up all DBs on the server if [ "$DBNAMES" = "all" ]; then DBNAMES="`mysql --user=$USERNAME --password=$PASSWORD --host=$DBHOST --batch --skip-column-names -e "show databases"| sed 's/ /%/g'`" # If DBs are excluded for exclude in $DBEXCLUDE do DBNAMES=`echo $DBNAMES | sed "s/\b$exclude\b//g"` done MDBNAMES=$DBNAMES fi echo ====================================================================== echo AutoMySQLBackup VER $VER echo http://sourceforge.net/projects/automysqlbackup/ echo echo Backup of Database Server - $HOST echo ====================================================================== # Test is seperate DB backups are required if [ "$SEPDIR" = "yes" ]; then echo Backup Start Time `date` echo ====================================================================== # Monthly Full Backup of all Databases if [ $DOM = "01" ]; then for MDB in $MDBNAMES do # Prepare $DB for using MDB="`echo $MDB | sed 's/%/ /g'`" if [ ! -e "$BACKUPDIR/monthly/$MDB" ] # Check Monthly DB Directory exists. then mkdir -p "$BACKUPDIR/monthly/$MDB" fi echo Monthly Backup of $MDB... dbdump "$MDB" "$BACKUPDIR/monthly/$MDB/${MDB}_$DATE.$M.$MDB.sql" compression "$BACKUPDIR/monthly/$MDB/${MDB}_$DATE.$M.$MDB.sql" BACKUPFILES="$BACKUPFILES $BACKUPDIR/monthly/$MDB/${MDB}_$DATE.$M.$MDB.sql$SUFFIX" echo ---------------------------------------------------------------------- done fi for DB in $DBNAMES do # Prepare $DB for using DB="`echo $DB | sed 's/%/ /g'`" # Create Seperate directory for each DB if [ ! -e "$BACKUPDIR/daily/$DB" ] # Check Daily DB Directory exists. then mkdir -p "$BACKUPDIR/daily/$DB" fi if [ ! -e "$BACKUPDIR/weekly/$DB" ] # Check Weekly DB Directory exists. then mkdir -p "$BACKUPDIR/weekly/$DB" fi # Weekly Backup if [ $DNOW = $DOWEEKLY ]; then echo Weekly Backup of Database \( $DB \) echo Rotating 5 weeks Backups... if [ "$W" -le 05 ];then REMW=`expr 48 + $W` elif [ "$W" -lt 15 ];then REMW=0`expr $W - 5` else REMW=`expr $W - 5` fi echo dbdump "$DB" "$BACKUPDIR/weekly/$DB/${DB}_week.$W.$DATE.sql" compression "$BACKUPDIR/weekly/$DB/${DB}_week.$W.$DATE.sql" BACKUPFILES="$BACKUPFILES $BACKUPDIR/weekly/$DB/${DB}_week.$W.$DATE.sql$SUFFIX" echo ---------------------------------------------------------------------- # Daily Backup else echo Daily Backup of Database \( $DB \) echo Rotating last weeks Backup... echo dbdump "$DB" "$BACKUPDIR/daily/$DB/${DB}_$DATE.$DOW.sql" compression "$BACKUPDIR/daily/$DB/${DB}_$DATE.$DOW.sql" BACKUPFILES="$BACKUPFILES $BACKUPDIR/daily/$DB/${DB}_$DATE.$DOW.sql$SUFFIX" echo ---------------------------------------------------------------------- fi done echo Backup End `date` echo ====================================================================== else # One backup file for all DBs echo Backup Start `date` echo ====================================================================== # Monthly Full Backup of all Databases if [ $DOM = "01" ]; then echo Monthly full Backup of \( $MDBNAMES \)... dbdump "$MDBNAMES" "$BACKUPDIR/monthly/$DATE.$M.all-databases.sql" compression "$BACKUPDIR/monthly/$DATE.$M.all-databases.sql" BACKUPFILES="$BACKUPFILES $BACKUPDIR/monthly/$DATE.$M.all-databases.sql$SUFFIX" echo ---------------------------------------------------------------------- fi # Weekly Backup if [ $DNOW = $DOWEEKLY ]; then echo Weekly Backup of Databases \( $DBNAMES \) echo echo Rotating 5 weeks Backups... if [ "$W" -le 05 ];then REMW=`expr 48 + $W` elif [ "$W" -lt 15 ];then REMW=0`expr $W - 5` else REMW=`expr $W - 5` fi echo dbdump "$DBNAMES" "$BACKUPDIR/weekly/week.$W.$DATE.sql" compression "$BACKUPDIR/weekly/week.$W.$DATE.sql" BACKUPFILES="$BACKUPFILES $BACKUPDIR/weekly/week.$W.$DATE.sql$SUFFIX" echo ---------------------------------------------------------------------- # Daily Backup else echo Daily Backup of Databases \( $DBNAMES \) echo echo Rotating last weeks Backup... echo dbdump "$DBNAMES" "$BACKUPDIR/daily/$DATE.$DOW.sql" compression "$BACKUPDIR/daily/$DATE.$DOW.sql" BACKUPFILES="$BACKUPFILES $BACKUPDIR/daily/$DATE.$DOW.sql$SUFFIX" echo ---------------------------------------------------------------------- fi echo Backup End Time `date` echo ====================================================================== fi echo Total disk space used for backup storage.. echo Size - Location echo `du -hs "$BACKUPDIR"` echo echo ====================================================================== echo If you find AutoMySQLBackup valuable please make a donation at echo http://sourceforge.net/project/project_donations.php?group_id=101066 echo ====================================================================== # Run command when we're done if [ "$POSTBACKUP" ] then echo ====================================================================== echo "Postbackup command output." echo eval $POSTBACKUP echo echo ====================================================================== fi #Clean up IO redirection exec 1>&6 6>&- # Restore stdout and close file descriptor #6. exec 1>&7 7>&- # Restore stdout and close file descriptor #7. if [ "$MAILCONTENT" = "files" ] then if [ -s "$LOGERR" ] then # Include error log if is larger than zero. BACKUPFILES="$BACKUPFILES $LOGERR" ERRORNOTE="WARNING: Error Reported - " fi #Get backup size ATTSIZE=`du -c $BACKUPFILES | grep "[[:digit:][:space:]]total$" |sed s/\s*total//` if [ $MAXATTSIZE -ge $ATTSIZE ] then BACKUPFILES=`echo "$BACKUPFILES" | sed -e "s# # -a #g"` #enable multiple attachments mutt -s "$ERRORNOTE MySQL Backup Log and SQL Files for $HOST - $DATE" $BACKUPFILES $MAILADDR < $LOGFILE #send via mutt else cat "$LOGFILE" | mail -s "WARNING! - MySQL Backup exceeds set maximum attachment size on $HOST - $DATE" $MAILADDR fi elif [ "$MAILCONTENT" = "log" ] then cat "$LOGFILE" | mail -s "MySQL Backup Log for $HOST - $DATE" $MAILADDR if [ -s "$LOGERR" ] then cat "$LOGERR" | mail -s "ERRORS REPORTED: MySQL Backup error Log for $HOST - $DATE" $MAILADDR fi elif [ "$MAILCONTENT" = "quiet" ] then if [ -s "$LOGERR" ] then cat "$LOGERR" | mail -s "ERRORS REPORTED: MySQL Backup error Log for $HOST - $DATE" $MAILADDR cat "$LOGFILE" | mail -s "MySQL Backup Log for $HOST - $DATE" $MAILADDR fi else if [ -s "$LOGERR" ] then cat "$LOGFILE" echo echo "###### WARNING ######" echo "Errors reported during AutoMySQLBackup execution.. Backup failed" echo "Error log below.." cat "$LOGERR" else cat "$LOGFILE" fi fi if [ -s "$LOGERR" ] then STATUS=1 else STATUS=0 fi # Clean up Logfile eval rm -f "$LOGFILE" eval rm -f "$LOGERR" exit $STATUS
any help appreciated
thanks
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10-18-2009, 12:36 PM #2
Here's a cut from the one I use (shell script, via cron), maybe that will help.
Code:# Get the Day of the Week (0-6) # This allows to save one backup for each day of the week # Just alter the date command if you want to use a timestamp DOW=`date +%w` # Dump all of our databases echo "Dumping MySQL Databases" for database in $databases do $mysqldumpcmd $userpassword $dumpoptions $database > ${backupdir}/${DOW}-${database}.sql done # Compress all of our backup files echo "Compressing Dump Files" for database in $databases do rm -f ${backupdir}/${DOW}-${database}.sql.gz $gzip ${backupdir}/${DOW}-${database}.sql done
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10-18-2009, 12:58 PM #3Web Hosting Evangelist
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Maybe you can add a few lines in the script which will run the find command on the backup directory, and delete the files which are modified earlier than 2 days. (+mtime).
Alternately, you can write down a separate cronjob which can take care of this task once the backup script finish execution.
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