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    mysql主主同步实现

1,基本的思路是排除数据库单点故障,保障数据高可用性。

2,前期对于要求不高的话可以用主主同步来实现,后期如果不能满足要求可以在后面加从数据库。

3,实验需要的环境及数据库的版本如下表格:

序号

名称

IP地址

数据库版本

系统版本

1

MySQL-Master01

10.93.58.72

mysql-5.5.32

CentOS release 6.9

2

MySQL-Master02

10.93.58.73

mysql-5.5.32

CentOS release 6.9

3

Test

10.93.58.70

CentOS release 6.9

4

virtual IP

10.93.58.74

4,正式安装数据步骤:

1)我是用了一个脚本来安装这个Mysql-5.5.32数据库,脚本如下:

#!/bin/bash

#auto_install_mysql

#auth by tony date 2018-07-31

yum -y install gcc gcc-c++ make ncurses ncurses-devel libaio-devel cmake

groupadd mysql

useradd mysql -s/sbin/nologin -M -g mysql

mkdir /application

wget http://10.93.58.70/lamp/mysql-5.5.32.tar.gz

tar xvf mysql-5.5.32.tar.gz

cd mysql-5.5.32

cmake . -DCMAKE_INSTALL_PREFIX=/application/mysql-5.5.32

-DMYSQL_DATADIR=/data/mysql

-DMYSQL_UNIX_ADDR=/application/mysql-5.5.32/tmp/mysql.sock

-DDEFAULT_CHARSET=utf8

-DDEFAULT_COLLATION=utf8_general_ci

-DEXTRA_CHARSETS=gbk,gb2312,utf8,ascii

-DENABLED_LOCAL_INFILE=ON

-DWITH_INNOBASE_STORAGE_ENGINE=1

-DWITH_FEDERATED_STORAGE_ENGINE=1

-DWITH_BLACKHOLE_STORAGE_ENGINE=1

-DWITHOUT_EXAMPLE_STORAGE_ENGINE=1

-DWITHOUT_PARTITION_STORAGE_ENGINE=1

-DWITH_FAST_MUTEXES=1

-DWITH_ZLIB=bundled

-DENABLED_LOCAL_INFILE=1

-DWITH_READLINE=1

-DWITH_EMBEDDED_SERVER=1

-DWITH_DEBUG=0

if [ $? -eq 0 ];then

    make && make install

        ln -s /application/mysql-5.5.32/ /application/mysql

        /bin/cp support-files/mysql.server /etc/init.d/mysqld

        chmod +x /etc/init.d/mysqld

        chown mysql.mysql /application/mysql

        chown mysql.mysql /data

        echo 'export PATH=/application/mysql/bin:$PATH '>>/etc/profile

        source /etc/profile

        mv /etc/my.cnf /etc/my.cnf.bak

        cat >/etc/my.cnf <<EOF

[mysqld]

port            = 3306

socket          = /application/mysql-5.5.32/tmp/mysql.sock

datadir         =/data/mysql

user            =mysql

# Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

log-bin=mysql-bin

server-id = 1

auto_increment_offset=1

auto_increment_increment=2

[mysqld_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

replicate-do-db =all

EOF

/application/mysql/scripts/mysql_install_db --basedir=/application/mysql/ --datadir=/data/mysql --user=mysql

/etc/init.d/mysqld start

chkconfig mysqld on

mysqladmin -uroot password 'hwg123'

                         echo -e " 33[32m-----------------------------------------------33[0m"

                echo -e "33[32mThe $M_FILES_DIR Server Install Success !33[0m"

        else

                echo -e "33[32mThe $M_FILES_DIR Make or Make install ERROR,Please Check......"

                exit 0

        fi


"mysqlset.sh" 66L, 2228C written                                                                              

[[email protected] ~]# cat mysqlset.sh 

#!/bin/bash

#auto_install_mysql

#auth by tony date 2018-07-31

yum -y install gcc gcc-c++ make ncurses ncurses-devel libaio-devel cmake

groupadd mysql

useradd mysql -s/sbin/nologin -M -g mysql

mkdir /application

wget http://10.93.58.70/lamp/mysql-5.5.32.tar.gz

tar xvf mysql-5.5.32.tar.gz

cd mysql-5.5.32

cmake . -DCMAKE_INSTALL_PREFIX=/application/mysql-5.5.32

-DMYSQL_DATADIR=/data/mysql

-DMYSQL_UNIX_ADDR=/application/mysql-5.5.32/tmp/mysql.sock

-DDEFAULT_CHARSET=utf8

-DDEFAULT_COLLATION=utf8_general_ci

-DEXTRA_CHARSETS=gbk,gb2312,utf8,ascii

-DENABLED_LOCAL_INFILE=ON

-DWITH_INNOBASE_STORAGE_ENGINE=1

-DWITH_FEDERATED_STORAGE_ENGINE=1

-DWITH_BLACKHOLE_STORAGE_ENGINE=1

-DWITHOUT_EXAMPLE_STORAGE_ENGINE=1

-DWITHOUT_PARTITION_STORAGE_ENGINE=1

-DWITH_FAST_MUTEXES=1

-DWITH_ZLIB=bundled

-DENABLED_LOCAL_INFILE=1

-DWITH_READLINE=1

-DWITH_EMBEDDED_SERVER=1

-DWITH_DEBUG=0

if [ $? -eq 0 ];then

    make && make install 

        ln -s /application/mysql-5.5.32/ /application/mysql

        /bin/cp support-files/mysql.server /etc/init.d/mysqld

        chmod +x /etc/init.d/mysqld

        chown mysql.mysql /application/mysql

        chown mysql.mysql /data

        echo 'export PATH=/application/mysql/bin:$PATH '>>/etc/profile

        source /etc/profile

        mv /etc/my.cnf /etc/my.cnf.bak

        cat >/etc/my.cnf <<EOF

[mysqld]

port            = 3306

socket          = /application/mysql-5.5.32/tmp/mysql.sock

datadir         =/data/mysql

user            =mysql

# Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

log-bin=mysql-bin

server-id = 1

auto_increment_offset=1

auto_increment_increment=2

[mysqld_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

replicate-do-db =all

EOF

/application/mysql/scripts/mysql_install_db --basedir=/application/mysql/ --datadir=/data/mysql --user=mysql

/etc/init.d/mysqld start

chkconfig mysqld on

mysqladmin -uroot password 'hwg123'

                         echo -e " 33[32m-----------------------------------------------33[0m"

                echo -e "33[32mThe $M_FILES_DIR Server Install Success !33[0m"

        else

                echo -e "33[32mThe $M_FILES_DIR Make or Make install ERROR,Please Check......"

                exit 0

        fi

2)查看my.cnf配置文件

[[email protected] ~]# cat /etc/my.cnf

[mysqld]

port            = 3306

socket          = /application/mysql-5.5.32/tmp/mysql.sock

datadir         =/data/mysql

user            =mysql

# Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

log-bin=mysql-bin

binlog_format = mixed

server-id = 1

auto_increment_offset=1

auto_increment_increment=2

[mysqld_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

replicate-do-db =all

3)进入数据库Master01:

[[email protected] ~]# mysql -uroot  -p

Enter password: 

输入密码:hwg123

4)给数据库授权:mysql>  grant replication slave on *.* to 'rep'@'10.93.58.73' identified by "hwg123";

技术分享图片

5)查看主库状态;mysql> show master status;

技术分享图片

6)在mater02上要做如下几步操作;

7)进入数据库;输入密码hwg123

[[email protected] ~]# mysql -uroot -p

Enter password: 

8)根据mysql-bind和post点来授权同步库和post点位。

mysql> change master to master_host='10.93.58.73',master_user='rep',master_password='hwg123',master_log_file='mysql-bin.000014',master_log_pos=263;

Query OK, 0 rows affected (0.06 sec)

9)开启slave同步

mysql> start slave;

Query OK, 0 rows affected (0.00 sec)

10)查看同步结果如果是两个YES;证明同步成功:

mysql> show slave statusG;

技术分享图片

5,切换到Master02上正式安装mysql-5.5.32。

1)使用脚本安装这里略过

2)查看配置文件,这里注意标红的地方:

[[email protected] ~]# cat /etc/my.cnf

[mysqld]

port            = 3306

socket          = /application/mysql-5.5.32/tmp/mysql.sock

datadir         =/data/mysql

user            =mysql

# Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

log-bin=mysql-bin

binlog_format = mixed

server-id = 2

auto_increment_offset=2

auto_increment_increment=2

[mysqld_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

replicate-do-db =all

3)进入数据库:输入密码hwg123

[[email protected] ~]# mysql -uroot -p

Enter password:

4)给数据库授权:mysql> grant replication slave on *.* to 'rep'@'10.93.58.72' identified by "hwg123";

技术分享图片

5)查看数据库状态:mysql> show master status;

技术分享图片

6)切换到master01上授权;

mysql> change master to master_host='10.93.58.73',master_user='rep',master_password='hwg123',master_log_file='mysql-bin.000006',master_log_pos=263;

7)开启slave同步

mysql> slave start;

8)查询同步状态:mysql> show slave statusG;

技术分享图片

7)这样主主同步就好了

6,安装keepalived来做高可用。我用的是keepalived-1.2.20.tar.gz

在Master01上操作如下:

yum –y install openssl openssl-devel

tar xf keepalived-1.2.20.tar.gz

cd keepalived-1.2.20

./configure --with-kernel-dir=/usr/src/kernels/2.6.32-696.el6.x86_64

make && make install

cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/

cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/

cp /usr/local/sbin/keepalived /usr/sbin/

mkdir /etc/keepalived

cd /etc/keepalived/

添加keepalived配置文件

[[email protected] ~]# vim /etc/keepalived/keepalived.conf

#####MASTER keepalived配置文件######

! Configuration File for keepalived 

global_defs { 

   notification_email { 

      [email protected] 

   } 

   notification_email_from [email protected]

   smtp_server 127.0.0.1 

   smtp_connect_timeout 30 

   router_id LVS_DEVEL 

# VIP1 

vrrp_instance VI_1 { 

    state MASTER   

    interface eth0 

    lvs_sync_daemon_inteface eth0 

    virtual_router_id 50 

    priority 50

    advert_int 1 

    nopreempt 

    authentication { 

        auth_type PASS 

        auth_pass 1111 

    } 

    virtual_ipaddress { 

        10.93.58.74

    } 

virtual_server 10.93.58.74 3306 { 

    delay_loop 6    

    lb_algo wrr    

    lb_kind DR   

    persistence_timeout 60    

    protocol TCP         

    real_server 10.93.58.72 3306 { 

        weight 1   

        notify_down /root/mysql.sh 

        TCP_CHECK { 

        connect_timeout 10 

        nb_get_retry 3 

        delay_before_retry 3 

        connect_port 3306 

        } 

    } 

[[email protected] ~]# vim mysql.sh vim  mysql.sh

#!/bin/bash

/etc/init.d/keepalived stop

[[email protected] ~]# chmod +x mysql.sh

在Master02上操作基本和Master01类似,只需要改keepalived.conf,配置如下,注意标红的地方:

#####SLAVE keepalived配置文件#####

! Configuration File for keepalived

global_defs {

   notification_email {

      [email protected]

   }

   notification_email_from [email protected]

   smtp_server 127.0.0.1

   smtp_connect_timeout 30

   router_id LVS_DEVEL

}

# VIP1

vrrp_instance VI_1 {

    state SLAVE

    interface eth0

    lvs_sync_daemon_inteface eth0

    virtual_router_id 50

    priority 30

    advert_int 5

#    nopreempt

    authentication {

        auth_type PASS

        auth_pass 1111

    }

    virtual_ipaddress {

        10.93.58.74

    }

}

virtual_server 10.93.58.74 3306 {

    delay_loop 6

    lb_algo wrr

    lb_kind DR

    persistence_timeout 60

    protocol TCP

    real_server 10.93.58.73 3306 {

        weight 1

        notify_down /root/mysql.sh

        TCP_CHECK {

        connect_timeout 10

        nb_get_retry 3

        delay_before_retry 3

        connect_port 3306

        }

    }

7,最后测试一下,停掉Master01主库;没有停主库前的ip。

技术分享图片

停了数据库后,看看日志显示;

[[email protected] ~]# /etc/init.d/mysqld stop 

Shutting down MySQL. SUCCESS! 

[[email protected] ~]# tail -fn20 /var/log/messages

技术分享图片

随后查看Master02上面的ip看看VIP有没有漂移过来。

[[email protected] ~]# ip a

技术分享图片

最后可以看出来IP已经漂移过来了,实验成功了。

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