1、编写脚本，支持让用户自主选择，使用mysqldump还是xtraback全量备份。

2、配置Mysql主从同步

3、使用MHA实现Mysql高可用。

1.编写脚本，支持让用户自主选择，使用mysqldump还是xtraback全量备份

思路：

mysqldump的备份分为全库备份-A和-B部分库备份 这个写两个函数

xtrabackup完全备份全库备份 写函数

定义彩色变量

while循环里面写，cat输入重定向打印彩色菜单提示符语句 read -p提示符，case语句菜单调用函数

image.png

复制可用，仅仅是全备份 没有考虑binlog备份。

下面注释的read -p的行 如果取消则变成交互式输入变量脚本

root@17 ~]# cat bk.sh

#!/bin/bash

. /etc/init.d/functions

. /etc/profile.d/path.sh

RED="echo -e \e[1;31m"

END="echo -e \e[0m"

TIME=`date +%F_%H-%M`

XBK=/backup/xbk

FULL_BK=/backup/full

#BIN_BK=/backup/binlog

BK_DIR=/backup

ETC="/mysql/3306/etc/my.cnf"

SOCK="/mysql/3306/sock/mysql.sock"

DB_LIST=$(mysql -e 'show databases'|grep -Ev 'information_schema|performance_schema|sys|Database')

USER=root

PASS=''

BK_USER=root

BK_IP=10.0.0.27

BK_PASS=123456

BK_PORT=22

#read -p "input the mysql_user: " USER

#read -p "input the mysql_passwd: " PASS

#read -p "input the bk_host user(like root): " BK_USER

#read -p "input the bk_host IP (like 10.0.0.8): " BK_IP

#read -p "input bk_host PASSWORD: " BK_PASS

test_connect_mysql(){

if [ -z $PASS ];then

mysql -u$USER -S $SOCK -e 'select @@hostname' &>/dev/null && action "connect mysql successful" || { action "connect to mysql failed,please check user,passd or host " false ;exit 3; }

else

mysql -u$USER -p${PASS} -S $SOCK -e 'select @@hostname' &>/dev/null && action "connect mysql successful" || { action "connect to mysql failed,please check user,passd or host " false ;exit 3; }

fi

}

dumpbk_B_mysql(){

[ -d ${FULL_BK} ] || mkdir -p ${FULL_BK}

#[ -d ${BIN_BK} ] || mkdir -p ${BIN_BK}

for DB in ${DB_LIST};do

if [ $PASS ! = "" ];then

mysqldump -u$USER -p${PASS} -S $SOCK -B $DB -F -E -R --triggers --single-transaction --master-data=2 -q | gzip > ${FULL_BK}/${DB}_dumpbk_${TIME}.sql.gz

else

mysqldump -u$USER -S $SOCK -B $DB -F -E -R --triggers --single-transaction --master-data=2 -q | gzip > ${FULL_BK}/${DB}_dumpbk_${TIME}.sql.gz

fi

[ $? -eq 0 ] && action "local ${DB} backup successful,see $FULL_BK" || { action "local backup failed" false;exit 3; }

done

}

dumpbk_A_mysql(){

[ -d ${FULL_BK} ] || mkdir -p ${FULL_BK}

#[ -d ${BIN_BK} ] || mkdir -p ${BIN_BK}

for DB in ${DB_LIST};do

if [ $PASS ! = "" ];then

mysqldump -u$USER -p${PASS} -S $SOCK -A -F --single-transaction --master-data=2 -q | gzip > ${FULL_BK}/ALL_dumpbk_${TIME}.sql.gz

else

mysqldump -u$USER -S $SOCK -A -F --single-transaction --master-data=2 -q | gzip > ${FULL_BK}/ALL_dumpbk_${TIME}.sql.gz

fi

[ $? -eq 0 ] && action "local backup successful,see backup dir $FULL_BK" ||{ action "local backup failed" false;exit 3; }

done

}

remote_bk (){

rpm -q sshpass &> /dev/null || yum -y install sshpass &>/dev/null

[ -f ~/.ssh/id_rsa ] || ssh-keygen -P "" -f /root/.ssh/id_rsa &>/dev/null

sshpass -p ${BK_PASS} ssh-copy-id -o StrictHostKeyChecking=no -i ~/.ssh/id_rsa.pub ${BK_USER}@${BK_IP} -p ${BK_PORT} &>/dev/null || { action "remote backup server message maybe incorrect" false;exit 3; }

sshpass -p ${BK_PASS} ssh -o StrictHostKeyChecking=no ${BK_USER}@${BK_IP} -p ${BK_PORT} mkdir -p ${BK_DIR}

rsync -auv -e "ssh -p $BK_PORT" ${BK_DIR}/* ${BK_USER}@${BK_IP}:${BK_DIR} &>/dev/null

[ $? -eq 0 ] && action "remote backup successful,see ${BK_USER}@${BK_IP}:${FULL_BK}" || { action "remote backup failed" false;exit3; }

}

xtrabackup_all (){

[ -d ${XBK} ] || mkdir -p ${XBK}

if [ $PASS ! = "" ];then

innobackupex --defaults-file=${ETC} --socket=${SOCK} --user=${BK_USER} --password=${BK_PASS} ${XBK}

else

innobackupex --defaults-file=${ETC} --socket=${SOCK} --user=${BK_USER} ${XBK} &>/dev/null

fi

[ $? -eq 0 ] && action "local backup successful,see backup dir $XBK" || { action "local backup failed" false;exit 3; }

}

while :;do

$RED

cat <

1)mysqldump全备份

2)mysqldump分库备份

3)xtrabackup全备份

4)退出

EOF

$END

read -p "please choose a backup method: " MENU

case $MENU in

1)

test_connect_mysql

dumpbk_A_mysql

remote_bk

;;

2)

test_connect_mysql

dumpbk_B_mysql

remote_bk

;;

3)

test_connect_mysql

xtrabackup_all

remote_bk

;;

4)

exit 0

;;

*)

action "please input correct value 1|2|3" false

exit 3

;;

esac

done

2.配置Mysql主从同步 我这里用GTID复制

主库10.0.0.8 master

从库10.0.0.18 slave

image.png

主库配置

更改master配置文件

# replication

server_id=8

# binlog

# sql_log_bin=ON #default ON

log_bin=/mysql/3306/binlog/mysql-bin

# sync_binlog=1

binlog_format=row # default row

gtid_mode=on

enforce-gtid-consistency=true #强制一致性

systemctl restart mysqld

创建复制用户并授权

mysql> create user repl@'10.0.0.%' identified by '123';

Query OK, 0 rows affected (0.01 sec)

mysql> grant replication slave on *.* to repl@'10.0.0.%';

Query OK, 0 rows affected (0.01 sec)

主库mysqldump全备份所有数据到从库slave1

# 如果是第一次配置主从，直接建立主从，不用此步骤

mysqldump -A --single-transaction --master-data=1 -F >/root/all.sql

scp /root/all.sql root@10.0.0.18:/root

从库配置

从库配置文件

# replication

server_id=18

# binlog

# sql_log_bin=ON #default ON

log_bin=/mysql/3306/binlog/mysql-bin

read-only #从库加只读

# sync_binlog=1

binlog_format=row # default row

gtid_mode=on

enforce-gtid-consistency=true #强制一致性

systemctl restart mysqld

还原数据库到从库

# 同样如果第一次建立主从 不用此步骤

root@18 ~]# mysql -e 'set sql_log_bin=0;source /root/all.sql;set sql_log_bin=1'

写change master to主库信息到master.info 注意此处写masterIP

CHANGE MASTER TO

MASTER_HOST='10.0.0.8',

MASTER_USER='repl',

MASTER_PASSWORD='123',

MASTER_PORT=3306,

MASTER_AUTO_POSITION=1;

启动从库IO和SQL线程并查看状态

start slave;

show slave status\G;

3.实现MHA高可用