XtraBackup备份笔记

安装

rpm -Uhv http://www.percona.com/downloads/percona-release/percona-release-0.0-1.x86_64.rpm

yum install xtrabackup

备份

innobackupex /backup/xtrabackup/

预备

innobackupex --apply-log /backup/xtrabackup/全备

还原

service mysqld stop

删除原来的mysql文件夹，创建一个新的mysql文件夹

innobackupex --copy-back /backup/xtrabackup/全备

chown –R mysql.mysql /var/lib/mysql

增量备份

先弄个全备

innobackupex /home/db_backup/

做第一个增量

innobackupex --incremental /backup/xtrabackup/ --incremental-basedir=/backup/xtrabackup/全备

做第二个增量

innobackupex --incremental /backup/xtrabackup/ --incremental-basedir=/backup/xtrabackup/增量1

预备增量

innobackupex --apply-log --redo-only /backup/xtrabackup/全备

innobackupex --apply-log --redo-only /backup/xtrabackup/全备 --incremental-dir=/backup/xtrabackup/增量1

innobackupex --apply-log /backup/xtrabackup/增量1 --incremental-dir=/backup/xtrabackup/增量2

还原

service mysqld stop

删除原来的mysql文件夹，创建一个新的mysql文件夹

innobackupex --copy-back /backup/xtrabackup/全备

chown –R mysql.mysql /var/lib/mysql

最后放个异地备份的脚本

#!/bin/sh

# xtrabackup的相关配置

INNOBACKUPEX="innobackupex "

MY_CNF="/etc/my.cnf"

MY_USER="xtrabackup"

MY_PASSWORD="xtrabackup"

MY_SOCKET="/var/lib/mysql/mysql.sock"

# 远程备份机 文件名配置

REMOTE_HOST="testa"

REMOTE_DIR="/backup/xtrabackup"

LOCAL_LSN_FILE="/backup/xtrabackup/.to_lsn_important"

DATE_NAME=`date +%Y-%m-%d-%H-%M-%S`

REMOTE_FILE=$DATE_NAME.tar.gz

LOCK_FILE="/backup/xtrabackup/.mysql.backup.lock"

LOCAL_BACKUP_DIR="/backup/xtrabackup/$DATE_NAME"

# 输出帮助信息

function usage()

{

echo "Usage:"

echo "-f db will be backuped fully with this parameter. If not , incrementally. "

}

#防止同时执行两个备份命令，发生冲突

if [ -f $LOCK_FILE ] ;then

echo 'Mysql backup lockfile is locked!'

exit 

fi

full=

while getopts "fh" arg #选项后面的冒号表示该选项需要参数

do

case $arg in

f)

full=

;;

h) # 输出帮助信息

usage

exit 

;;

esac

done

echo "backup dir is $REMOTE_DIR/$REMOTE_FILE"

# backup up db to remote host

echo "start to backup db!"`date +%Y-%m-%d-%H-%M-%S`

"x ] ;then

# 全量备份

' > $LOCK_FILE

$INNOBACKUPEX --defaults-file=$MY_CNF --user=$MY_USER --password=$MY_PASSWORD --socket=$MY_SOCKET ./ --stream=tar | gzip | ssh $REMOTE_HOST "cat - > $REMOTE_DIR/FULL-$REMOTE_FILE"

ssh $REMOTE_HOST "cd $REMOTE_DIR;rm -f xtrabackup_checkpoints;tar zxfi $REMOTE_DIR/FULL-$REMOTE_FILE xtrabackup_checkpoints "

toLSN=$( ssh $REMOTE_HOST "cat $REMOTE_DIR/xtrabackup_checkpoints|grep to_lsn|awk -F= '{gsub(/ /,\"\",\$2);print \$2}'" )

if [ $toLSN ] ;then

echo $toLSN > $LOCAL_LSN_FILE

else

echo 'no lsn from remote host!please check!'

fi

else

# 增量备份

if [ -f $LOCAL_LSN_FILE ] ;then

toLSN=`cat $LOCAL_LSN_FILE`

fi

if [ ! $toLSN ] ;then

echo 'last LSN is not set !please check!'

exit 

fi

' > $LOCK_FILE

mkdir -p $LOCAL_BACKUP_DIR

echo "last to lsn is "$toLSN

$INNOBACKUPEX --parallel= --defaults->/tmp/innobackexLog

toLSN=$( cd $LOCAL_BACKUP_DIR/*; cat xtrabackup_checkpoints|grep to_lsn|awk -F= '{gsub(/ /,"",$2);print $2}' )

echo "new to lsn is "$toLSN;

if [ $toLSN ] ;then

echo $toLSN > $LOCAL_LSN_FILE

cd $LOCAL_BACKUP_DIR/*;tar zc .|ssh $REMOTE_HOST "cat - > $REMOTE_DIR/$REMOTE_FILE"

echo "save file to $REMOTE_HOST @ $REMOTE_DIR/$REMOTE_FILE"

else

echo 'no lsn from local backup file!delete remote backup file!'$LOCAL_BACKUP_DIR/$REMOTE_FILE

fi

echo "remove $LOCAL_BACKUP_DIR"

rm -rf $LOCAL_BACKUP_DIR

fi

rm -f $LOCK_FILE

echo "end to backup db!"`date +%Y-%m-%d-%H-%M-%S`