本篇内容介绍了“MySQL的备份脚本分享”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
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#!/bin/bash
#################################################################
# #
# Purpose: MySQL backups #
# This script does a full or incremental backup #
# The full is done via mysqldump#
# The incremental is done via flush-logs option #
# with mysqladmin#
# #
# The script is also setup to email if a #
# failure occurs #
# #
# Assumptions: #
# 1. Database is in Binary Update Log mode #
# 2. The variables are set correctly #
##
#Usage:mysql_backup [full|incremental]#
##
# #
#################################################################
#################################################################
# INITILIAZE VARIABLES #
#################################################################
# Set the mode, full|incremental
# parameter is passed in
MODE=$1
# set the username to connect to mysql for the backup
MYSQLUSER=backup
# set the password to connect to mysql for the backup
MYSQLUSERPW=password
# set the Binary Update Logs Path
BINLOGPATH=/mysql/logs/emds01/mysql
# Set the binary Update Logs name
BINLOGNAME=viper2-bin
# set the backup path
BACKUPPATH=/export/home/mysql/backups
# set the email address for errors to be emailed to
EMAIL_ADDR=shenandoah.speers@cicadacorp.com
# set the log file
LOGFILE=$BACKUPPATH/logs/$HOSTNAME_$RUNDATE.log
# set the error log file
LOGERR=$BACKUPPATH/logs/ERRORS_$HOSTNAME_$RUNDATE.log
# set the number of days to keep the backups
DAYSTOKEEP=5
# set Run date
RUNDATE=`date +%Y%m%d%s`
# set hostname
HOSTNAME=`uname -n`
#################################################################
# GLOBAL FUNCTIONS #
#################################################################
copyBinlogs() {
# copy binlogs to backup dir
echo "Copying binlogs"
for FILE in `cat $BINLOGPATH/$BINLOGNAME.index`
do
SFILE=(${FILE/*//})
echo "- binlog $SFILE"
cp $FILE $BACKUPPATH/$SFILE_$RUNDATE
gzip $BACKUPPATH/$SFILE_$RUNDATE
done
}
removeOldBackups() {
# remove old backups
echo "Removing old backups greater then $DAYSTOKEEP days"
find $BACKUPPATH -type f -mtime +$DAYSTOKEEP -name *.gz -print -exec rm {} ;
find $BACKUPPATH/logs -type f -mtime +$DAYSTOKEEP -name *.log -print -exec rm {} ;
}
startlog() {
# 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 $LOGERR.
}
stoplog() {
#Clean up IO redirection
exec 1>&6 6>&- # Restore stdout and close file descriptor #6.
exec 1>&7 7>&- # Restore stdout and close file descriptor #7.
}
#################################################################
# START OF MAIN #
#################################################################
case "$MODE" in
'full')
# Daily backup
# - copy all bin logs to backup directory
# - remove old backups and logs
startlog;
echo "Start Mysql Daily backup `date +%c`"
mysqldump -u $MYSQLUSER -p$MYSQLUSERPW --single-transaction --flush-logs --master-data=2
--all-databases --delete-master-logs | gzip > $BACKUPPATH/$HOSTNAME_full_$RUNDATE.sql.gz
copyBinlogs;
removeOldBackups;
echo "Finish Mysql Daily backup `date +%c`"
stoplog;
email;
;;
'incremental')
# hourly backup
# - flush logs
# - copy all bin logs to backup directory if not already done
echo "Start Mysql hourly backup `date +%c`"
startlog;
mysqladmin -u $MYSQLUSER -p$MYSQLUSERPW flush-logs
copyBinlogs;
echo "Finish Mysql hourly backup `date +%c`"
stoplog;
;;
*)
echo "Usage: mysql_backup [full|incremental]"
;;
esac
# email any errors encountered
if [ -s "$LOGERR" ]
then
cat "$LOGERR" | mail -s "ERRORS REPORTED: MySQL Backup error Log for $HOSTNAME - $RUNDATE" $EMAIL_ADDR
cat "$LOGFILE" | mail -s "MySQL Backup Log for $HOSTNAME - $RUNDATE" $EMAIL_ADDR
STATUS=1
else
STATUS=0
fi
exit $STATUS
#################################################################
# END OF MAIN #
#################################################################“mysql的备份脚本分享”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注创新互联网站，小编将为大家输出更多高质量的实用文章！
